/* ===== RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    user-select: none;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #1a1a2e;
    color: #fff;
    touch-action: manipulation;
}

/* ===== GAME CONTAINER ===== */
#game-container {
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
}

/* ===== SCREENS ===== */
.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: none;
    flex-direction: column;
}

.screen.active {
    display: flex;
}

.screen-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 20px;
    background: rgba(0,0,0,0.4);
    z-index: 10;
}

.screen-header h2 {
    font-size: 1.4rem;
    flex: 1;
    text-align: center;
}

/* ===== BUTTONS ===== */
.btn {
    border: none;
    border-radius: 16px;
    cursor: pointer;
    font-family: inherit;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: transform 0.1s, box-shadow 0.1s;
    -webkit-tap-highlight-color: transparent;
}

/* V28: Enhanced button press feedback */
.btn:active {
    transform: scale(0.93);
    filter: brightness(0.85);
    transition: transform 0.05s, filter 0.05s;
}

/* V18: Visible focus styles for keyboard navigation */
.btn:focus-visible,
.answer-btn:focus-visible,
.garage-tab:focus-visible,
.settings-item:focus-visible,
.grade-btn:focus-visible,
.upgrade-btn:focus-visible,
.mod-btn:focus-visible,
.mod-buy:focus-visible,
.topic-card:focus-visible,
.car-type-card:focus-visible,
.garage-item:focus-visible,
.map-stop:focus-visible {
    outline: 3px solid #ffd700;
    outline-offset: 2px;
}

/* V17: GPU acceleration hints for smoother animations on tablets */
.btn, .answer-btn { will-change: transform; }
.screen { will-change: opacity; }
#race-canvas { touch-action: none; }
#celebration-canvas { will-change: transform; }

.btn-primary {
    background: linear-gradient(135deg, #e94560, #c81d4e);
    color: #fff;
    padding: 16px 40px;
    font-size: 1.3rem;
    box-shadow: 0 4px 15px rgba(233, 69, 96, 0.4);
}

.btn-secondary {
    background: linear-gradient(135deg, #0f3460, #16213e);
    color: #fff;
    padding: 16px 40px;
    font-size: 1.3rem;
    border: 2px solid #e94560;
    box-shadow: 0 4px 15px rgba(15, 52, 96, 0.4);
}

.btn-small {
    background: rgba(255,255,255,0.1);
    color: #fff;
    padding: 12px 20px;
    font-size: 0.9rem;
    border: 1px solid rgba(255,255,255,0.2);
    min-height: 44px; /* V17: WCAG touch target minimum */
}

.btn-back {
    background: rgba(255,255,255,0.15);
    color: #fff;
    padding: 10px 16px;
    font-size: 1rem;
    min-height: 44px; /* V17: WCAG touch target minimum */
    display: inline-flex;
    align-items: center;
}

.btn-large {
    min-width: 220px;
    min-height: 60px;
    transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.2s;
}

/* V14: Title screen buttons breathe subtly */
.title-buttons .btn-primary {
    animation: btn-breathe 3s ease-in-out infinite;
    animation-delay: 0.3s;
}
.title-buttons .btn-secondary {
    animation: btn-breathe 3s ease-in-out infinite;
    animation-delay: 0.9s;
}

@keyframes btn-breathe {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

.btn-icon {
    margin-right: 8px;
}

/* ===== TITLE SCREEN ===== */
.title-bg {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    background: linear-gradient(180deg, #0f3460 0%, #1a1a2e 50%, #16213e 100%);
    padding: 20px;
    gap: 12px;
    position: relative;
    overflow: hidden;
}

/* V14: Floating sparkle particles on title screen */
.title-bg::before,
.title-bg::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
    background-image:
        radial-gradient(2px 2px at 15% 20%, rgba(255,215,0,0.6) 50%, transparent 100%),
        radial-gradient(2px 2px at 45% 60%, rgba(233,69,96,0.5) 50%, transparent 100%),
        radial-gradient(1px 1px at 70% 30%, rgba(255,255,255,0.5) 50%, transparent 100%),
        radial-gradient(2px 2px at 85% 75%, rgba(255,215,0,0.4) 50%, transparent 100%),
        radial-gradient(1px 1px at 30% 85%, rgba(233,69,96,0.4) 50%, transparent 100%),
        radial-gradient(2px 2px at 60% 15%, rgba(255,255,255,0.4) 50%, transparent 100%);
    background-size: 100% 100%;
    animation: sparkle-drift 8s ease-in-out infinite alternate;
}

.title-bg::after {
    background-image:
        radial-gradient(1px 1px at 25% 45%, rgba(255,255,255,0.5) 50%, transparent 100%),
        radial-gradient(2px 2px at 55% 25%, rgba(255,215,0,0.5) 50%, transparent 100%),
        radial-gradient(1px 1px at 80% 55%, rgba(233,69,96,0.4) 50%, transparent 100%),
        radial-gradient(2px 2px at 10% 70%, rgba(255,255,255,0.3) 50%, transparent 100%),
        radial-gradient(1px 1px at 90% 40%, rgba(255,215,0,0.4) 50%, transparent 100%);
    background-size: 100% 100%;
    animation: sparkle-drift 12s ease-in-out infinite alternate-reverse;
}

@keyframes sparkle-drift {
    0% { transform: translateY(0) translateX(0); opacity: 0.5; }
    50% { transform: translateY(-15px) translateX(8px); opacity: 1; }
    100% { transform: translateY(10px) translateX(-5px); opacity: 0.6; }
}

.game-title {
    font-size: 2.8rem;
    text-align: center;
    line-height: 1.1;
    text-shadow: 0 0 30px rgba(233, 69, 96, 0.6), 0 0 60px rgba(233, 69, 96, 0.2);
    letter-spacing: 4px;
    animation: title-glow 3s ease-in-out infinite alternate;
}

@keyframes title-glow {
    0% { text-shadow: 0 0 20px rgba(233, 69, 96, 0.4), 0 0 40px rgba(233, 69, 96, 0.1); }
    50% { text-shadow: 0 0 30px rgba(233, 69, 96, 0.7), 0 0 60px rgba(233, 69, 96, 0.3), 0 0 80px rgba(255, 215, 0, 0.15); }
    100% { text-shadow: 0 0 25px rgba(233, 69, 96, 0.5), 0 0 50px rgba(233, 69, 96, 0.2); }
}

.title-accent {
    color: #e94560;
    font-size: 2rem;
    animation: accent-pulse 2s ease-in-out infinite alternate;
}

@keyframes accent-pulse {
    0% { color: #e94560; transform: scale(1); }
    100% { color: #ff6b6b; transform: scale(1.03); }
}

.title-subtitle {
    font-size: 1rem;
    color: #bbb;
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 8px;
    animation: subtitle-fade 4s ease-in-out infinite alternate;
}

@keyframes subtitle-fade {
    0% { opacity: 0.7; }
    100% { opacity: 1; letter-spacing: 4px; }
}

/* V29: Zelda-inspired title decorations */
.zelda-title-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 18px;
    z-index: 1;
}
.zelda-title-center {
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* --- Triforce --- */
.zelda-triforce {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-top: 2px;
    filter: drop-shadow(0 0 8px rgba(255,215,0,0.6));
    animation: triforce-glow 3s ease-in-out infinite alternate;
}
@keyframes triforce-glow {
    0% { filter: drop-shadow(0 0 6px rgba(255,215,0,0.4)); }
    100% { filter: drop-shadow(0 0 14px rgba(255,215,0,0.8)); }
}
.triforce-top, .triforce-left, .triforce-right {
    width: 0; height: 0;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-bottom: 17px solid #ffd700;
}
.triforce-top { margin-bottom: -1px; }
.triforce-bottom {
    display: flex;
    gap: 1px;
}

/* --- Master Sword --- */
.zelda-sword {
    display: flex;
    flex-direction: column;
    align-items: center;
    transform: rotate(-15deg);
    filter: drop-shadow(0 0 6px rgba(120,180,255,0.5));
    animation: sword-shimmer 4s ease-in-out infinite alternate;
}
@keyframes sword-shimmer {
    0% { filter: drop-shadow(0 0 4px rgba(120,180,255,0.3)); }
    50% { filter: drop-shadow(0 0 10px rgba(180,220,255,0.7)); }
    100% { filter: drop-shadow(0 0 6px rgba(120,180,255,0.4)); }
}
.sword-blade {
    width: 6px;
    height: 52px;
    background: linear-gradient(180deg, #e8e8ff 0%, #b0c4de 40%, #8fa8c8 100%);
    clip-path: polygon(50% 0%, 100% 100%, 0% 100%);
    border-radius: 1px;
}
.sword-guard {
    width: 28px;
    height: 6px;
    background: linear-gradient(90deg, #4a69bd, #6a89cc, #4a69bd);
    border-radius: 2px;
    margin-top: -1px;
    position: relative;
}
.sword-guard::before, .sword-guard::after {
    content: '';
    position: absolute;
    top: 0;
    width: 5px;
    height: 5px;
    background: #ffd700;
    border-radius: 50%;
}
.sword-guard::before { left: -1px; }
.sword-guard::after { right: -1px; }
.sword-grip {
    width: 5px;
    height: 16px;
    background: linear-gradient(180deg, #4a3070 0%, #6b4c9a 50%, #4a3070 100%);
    border-radius: 1px;
}
.sword-pommel {
    width: 10px;
    height: 8px;
    background: linear-gradient(180deg, #ffd700, #daa520);
    border-radius: 0 0 5px 5px;
    clip-path: polygon(15% 0%, 85% 0%, 100% 60%, 50% 100%, 0% 60%);
}

/* --- Hylian Shield --- */
.zelda-shield {
    filter: drop-shadow(0 0 6px rgba(60,100,200,0.5));
    animation: shield-gleam 5s ease-in-out infinite alternate;
}
@keyframes shield-gleam {
    0% { filter: drop-shadow(0 0 4px rgba(60,100,200,0.3)); }
    50% { filter: drop-shadow(0 0 10px rgba(60,100,200,0.6)); }
    100% { filter: drop-shadow(0 0 5px rgba(60,100,200,0.4)); }
}
.shield-body {
    width: 50px;
    height: 62px;
    background: linear-gradient(180deg, #2a4694 0%, #1a3070 50%, #1e2d60 100%);
    clip-path: polygon(50% 0%, 100% 10%, 100% 55%, 50% 100%, 0% 55%, 0% 10%);
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding-top: 2px;
    box-shadow: inset 0 0 0 2px rgba(255,215,0,0.5);
}
.shield-body::before {
    content: '';
    position: absolute;
    inset: 3px;
    clip-path: polygon(50% 0%, 100% 10%, 100% 55%, 50% 100%, 0% 55%, 0% 10%);
    border: 1px solid rgba(255,215,0,0.3);
}
.shield-bird {
    width: 22px;
    height: 14px;
    position: relative;
    margin-bottom: 2px;
}
/* Hylian wingcrest — CSS chevron/bird */
.shield-bird::before {
    content: '';
    position: absolute;
    top: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 14px;
    height: 7px;
    border-top: 2px solid #c0392b;
    border-left: 2px solid #c0392b;
    border-right: 2px solid #c0392b;
    border-radius: 8px 8px 0 0;
}
.shield-bird::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 0; height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 4px solid #c0392b;
}
.shield-triforce-mini {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    width: 18px;
}
.mini-tri-top, .mini-tri-bl, .mini-tri-br {
    width: 0; height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-bottom: 7px solid #ffd700;
}
.mini-tri-top { margin-bottom: -1px; }

/* --- Responsive: compact on small screens --- */
@media (max-height: 650px) {
    .zelda-title-row { gap: 10px; }
    .zelda-sword { transform: rotate(-15deg) scale(0.7); }
    .zelda-shield { transform: scale(0.7); }
    .zelda-triforce { margin-top: 0; }
    .triforce-top, .triforce-left, .triforce-right {
        border-left-width: 8px;
        border-right-width: 8px;
        border-bottom-width: 14px;
    }
}
@media (max-width: 600px) {
    .zelda-sword, .zelda-shield { display: none; }
    .zelda-title-row { gap: 0; }
}

.title-corvette {
    width: 280px;
    height: 80px;
    margin: 8px 0;
    overflow: hidden;
}
.title-corvette canvas {
    width: 100%;
    height: 100%;
}

.title-buttons {
    display: flex;
    gap: 16px;
    margin-top: 8px;
    flex-wrap: wrap;
    justify-content: center;
    width: 100%;
    max-width: 540px;
    padding: 0 12px;
}

.title-bottom-buttons {
    display: flex;
    gap: 10px;
    margin-top: 12px;
    flex-wrap: wrap;
    justify-content: center;
}

/* ===== LEVEL BADGE (Title Screen) ===== */
.title-level-badge {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(0,0,0,0.4);
    border: 2px solid rgba(255,215,0,0.4);
    border-radius: 20px;
    padding: 6px 16px;
}

.level-badge-icon {
    font-size: 1.1rem;
    font-weight: 900;
    color: #ffd700;
}

.level-badge-rank {
    font-size: 0.9rem;
    font-weight: 700;
    color: #fff;
}

.level-badge-bar {
    width: 60px;
    height: 6px;
    background: rgba(255,255,255,0.2);
    border-radius: 3px;
    overflow: hidden;
}

.level-badge-fill {
    height: 100%;
    background: linear-gradient(90deg, #ffd700, #e94560);
    border-radius: 3px;
}

/* ===== TOPIC SELECT ===== */
/* V23: Game Mode Selection Bar */
.mode-bar {
    display: flex;
    gap: 8px;
    padding: 8px 20px 0;
    flex-wrap: wrap;
    justify-content: center;
}

.mode-btn {
    background: linear-gradient(135deg, #16213e, #0f3460);
    border: 2px solid rgba(233, 69, 96, 0.3);
    border-radius: 24px;
    color: #fff;
    padding: 8px 16px;
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.15s, border-color 0.15s, background 0.15s;
    font-family: inherit;
    white-space: nowrap;
}

.mode-btn:active {
    transform: scale(0.95);
}

.mode-btn.mode-active {
    background: linear-gradient(135deg, #e94560, #c73050);
    border-color: #ffd700;
    box-shadow: 0 0 12px rgba(233, 69, 96, 0.4);
}

.mode-btn.mode-locked {
    opacity: 0.45;
    cursor: not-allowed;
}

.mode-btn.mode-beaten {
    border-color: #4caf50;
}

.topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
    padding: 20px;
    overflow-y: auto;
    flex: 1;
}

.topic-card {
    background: linear-gradient(135deg, #16213e, #0f3460);
    border: 2px solid rgba(233, 69, 96, 0.3);
    border-radius: 16px;
    padding: 20px;
    text-align: center;
    cursor: pointer;
    transition: transform 0.15s, border-color 0.15s;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 100px;
    position: relative;
}

.topic-card:active {
    transform: scale(0.93);
    border-color: #e94560;
    filter: brightness(1.15);
}

.topic-card .topic-icon {
    font-size: 2rem;
}

.topic-card .topic-name {
    font-size: 1.1rem;
    font-weight: 700;
}

.topic-card.locked {
    opacity: 0.4;
    pointer-events: none;
}

.topic-suggested {
    position: absolute;
    top: -8px;
    right: -8px;
    background: #e94560;
    color: #fff;
    font-size: 0.65rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 8px;
    text-transform: uppercase;
}

/* ===== RACE SCREEN ===== */
#race-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

.race-hud {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 16px;
    background: rgba(0,0,0,0.5);
    z-index: 10;
}

.hud-position {
    font-size: 1.1rem;
    font-weight: 700;
    color: #ffd700;
}

.hud-progress {
    display: flex;
    align-items: center;
    gap: 8px;
}

.progress-bar {
    width: 120px;
    height: 12px;
    background: rgba(255,255,255,0.2);
    border-radius: 6px;
    overflow: visible;
    position: relative;
}
.progress-player-dot {
    position: absolute;
    top: -2px;
    width: 8px;
    height: 8px;
    background: #2ecc71;
    border: 2px solid #fff;
    border-radius: 50%;
    transform: translateX(-50%);
    z-index: 3;
    transition: left 0.3s;
}
.progress-opp-dot {
    position: absolute;
    top: 0;
    width: 6px;
    height: 6px;
    background: #e74c3c;
    border-radius: 50%;
    transform: translateX(-50%);
    z-index: 2;
    opacity: 0.8;
    transition: left 0.3s;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #e94560, #ffd700);
    border-radius: 6px;
    transition: width 0.3s;
    width: 0%;
    overflow: hidden;
}

.hud-streak {
    font-size: 1.4rem;
    font-weight: 900;
    color: #ffd700;
    min-width: 70px;
    text-align: right;
    text-shadow: 0 0 8px rgba(255, 215, 0, 0.6);
    transition: transform 0.2s;
}
.hud-streak.streak-pulse {
    animation: streak-grow 0.4s ease-out;
}
@keyframes streak-grow {
    0% { transform: scale(1); }
    40% { transform: scale(1.5); }
    100% { transform: scale(1); }
}

/* Power-up active indicator */
.hud-powerup {
    position: absolute;
    top: 40px;
    right: 12px;
    font-size: 1.5rem;
    padding: 4px 10px;
    border-radius: 16px;
    background: rgba(0, 0, 0, 0.5);
    color: #fff;
    font-weight: 700;
    z-index: 15;
    animation: powerup-glow 1s ease-in-out infinite alternate;
}
@keyframes powerup-glow {
    0% { box-shadow: 0 0 6px rgba(46, 204, 113, 0.4); }
    100% { box-shadow: 0 0 14px rgba(46, 204, 113, 0.8); }
}

/* ===== QUESTION OVERLAY ===== */
.question-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.6);
    z-index: 20;
    padding: 16px;
    overflow: hidden;
}

.question-box {
    background: linear-gradient(135deg, #16213e, #1a1a2e);
    border: 3px solid #e94560;
    border-radius: 24px;
    padding: 20px 24px;
    max-width: 550px;
    width: 90%;
    text-align: center;
    box-shadow: 0 0 40px rgba(233, 69, 96, 0.3);
    position: relative;
    max-height: 95vh;
    overflow-y: auto;
}

.question-text {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.4;
    min-height: 50px;
}

.btn-speaker {
    position: absolute;
    top: 12px;
    right: 16px;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.btn-speaker:active {
    opacity: 1;
    transform: scale(1.1);
}

.answers-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.answer-btn {
    background: linear-gradient(135deg, #0f3460, #16213e);
    border: 2px solid rgba(255,255,255,0.2);
    border-radius: 16px;
    color: #fff;
    padding: 14px 16px;
    font-size: 1.3rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.1s, background 0.2s, border-color 0.2s;
    min-height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: inherit;
}

.answer-btn:active {
    transform: scale(0.93);
    filter: brightness(0.85);
}

.answer-btn.correct {
    background: linear-gradient(135deg, #27ae60, #2ecc71);
    border-color: #2ecc71;
    animation: pulse-correct 0.4s;
}

.answer-btn.wrong {
    background: linear-gradient(135deg, #a0522d, #cd853f);
    border-color: #cd853f;
    animation: card-shake 0.4s;
}
.answer-btn.answered:not(.correct):not(.wrong) {
    opacity: 0.4;
    transform: scale(0.95);
}

@keyframes pulse-correct {
    0% { transform: scale(1); }
    50% { transform: scale(1.08); }
    100% { transform: scale(1); }
}

/* ===== EXPLANATION BUBBLE ===== */
.explanation-bubble {
    background: rgba(46, 204, 113, 0.15);
    border: 2px solid #2ecc71;
    border-radius: 12px;
    padding: 12px 16px;
    margin-top: 12px;
    font-size: 1rem;
    line-height: 1.4;
    color: #2ecc71;
    font-weight: 600;
    animation: bubble-in 0.3s ease-out;
}

@keyframes bubble-in {
    0% { opacity: 0; transform: translateY(10px); }
    100% { opacity: 1; transform: translateY(0); }
}

/* ===== RACE FEEDBACK ===== */
.race-feedback {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 2.5rem;
    font-weight: 900;
    z-index: 25;
    text-shadow: 0 0 20px rgba(0,0,0,0.8);
    pointer-events: none;
    animation: feedback-pop 0.8s forwards;
}

.race-feedback.correct-feedback {
    color: #2ecc71;
}

.race-feedback.wrong-feedback {
    color: #e74c3c;
}

@keyframes feedback-pop {
    0% { opacity: 0; transform: translate(-50%, -50%) scale(0.5); }
    30% { opacity: 1; transform: translate(-50%, -50%) scale(1.2); }
    70% { opacity: 1; transform: translate(-50%, -60%) scale(1); }
    100% { opacity: 0; transform: translate(-50%, -80%) scale(0.8); }
}

/* ===== V21: ARROW PAD ===== */
.arrow-pad {
    position: absolute;
    left: 12px;
    bottom: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    z-index: 15;
    pointer-events: auto;
}

.arrow-btn {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    border: 3px solid rgba(255,255,255,0.6);
    background: rgba(0,0,0,0.35);
    color: rgba(255,255,255,0.85);
    font-size: 1.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    transition: background 0.1s;
    line-height: 1;
    padding: 0;
}

.arrow-btn:active {
    background: rgba(233,69,96,0.6);
    border-color: #fff;
    transform: scale(0.92);
}

/* ===== PODIUM ===== */
.podium-container {
    display: flex;
    justify-content: center;
    align-items: flex-end;
    gap: 6px;
    margin-bottom: 8px;
}

.podium-col {
    display: flex;
    flex-direction: column;
    align-items: center;
    animation: podium-rise 0.6s ease-out both;
}

.podium-car {
    width: 70px;
    height: 35px;
    object-fit: contain;
    margin-bottom: 4px;
    opacity: 0;
    animation: podium-car-pop 0.4s ease-out forwards;
}

.podium-car.podium-player {
    filter: drop-shadow(0 0 6px rgba(255, 215, 0, 0.8));
}

.podium-label {
    font-size: 0.75rem;
    font-weight: 800;
    color: #ccc;
    margin-bottom: 2px;
}
.podium-name {
    font-size: 0.65rem;
    font-weight: 600;
    color: #aaa;
    margin-bottom: 0;
}

.podium-player-label {
    color: #ffd700;
    text-shadow: 0 0 6px rgba(255, 215, 0, 0.6);
}

.podium-block {
    width: 70px;
    border-radius: 6px 6px 0 0;
    animation: podium-rise 0.6s ease-out both;
}

.podium-block-1 {
    background: linear-gradient(180deg, #ffd700, #b8860b);
    box-shadow: 0 0 12px rgba(255, 215, 0, 0.4);
}

.podium-block-2 {
    background: linear-gradient(180deg, #c0c0c0, #808080);
}

.podium-block-3 {
    background: linear-gradient(180deg, #cd7f32, #8b4513);
}

@keyframes podium-rise {
    0% { transform: scaleY(0); transform-origin: bottom; }
    100% { transform: scaleY(1); transform-origin: bottom; }
}

@keyframes podium-car-pop {
    0% { opacity: 0; transform: translateY(10px); }
    100% { opacity: 1; transform: translateY(0); }
}

/* ===== RESULTS SCREEN ===== */
.results-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100%;
    background: linear-gradient(180deg, #0f3460, #1a1a2e);
    padding: 16px 20px;
    gap: 10px;
    z-index: 10;
    position: relative;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.results-title {
    font-size: 2.2rem;
    color: #ffd700;
    text-shadow: 0 0 20px rgba(255, 215, 0, 0.5);
}

.results-stars {
    font-size: 3rem;
    margin: 4px 0;
}

.results-stats {
    background: rgba(0,0,0,0.3);
    border-radius: 16px;
    padding: 12px 24px;
    text-align: center;
    font-size: 1.1rem;
    line-height: 1.8;
    animation: stats-slide-up 0.5s ease-out 0.3s both;
}

/* V14: Stats section slides up on appear */
@keyframes stats-slide-up {
    0% { opacity: 0; transform: translateY(20px); }
    100% { opacity: 1; transform: translateY(0); }
}

/* V14: Title drops in */
.results-title {
    animation: title-drop 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}
@keyframes title-drop {
    0% { opacity: 0; transform: translateY(-20px) scale(0.8); }
    100% { opacity: 1; transform: translateY(0) scale(1); }
}

/* V14: Buttons fade in last */
.results-buttons {
    animation: stats-slide-up 0.4s ease-out 0.8s both;
}
.results-answers {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin-bottom: 8px;
}
.answer-dot {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    font-size: 1.1rem;
    font-weight: bold;
    animation: dot-pop 0.4s ease-out both;
}
.correct-dot {
    background: #2ecc71;
    color: #fff;
    box-shadow: 0 0 8px rgba(46, 204, 113, 0.5);
}
.wrong-dot {
    background: #e74c3c;
    color: #fff;
    box-shadow: 0 0 8px rgba(231, 76, 60, 0.5);
}
@keyframes dot-pop {
    0% { transform: scale(0); opacity: 0; }
    70% { transform: scale(1.2); }
    100% { transform: scale(1); opacity: 1; }
}
.results-streak {
    font-size: 1.2rem;
    color: #ff9800;
}
.results-xp-section {
    text-align: center;
}
.results-xp {
    font-size: 1.4rem;
    font-weight: bold;
    color: #ffd700;
}
/* V14: XP progress bar */
.results-xp-bar {
    width: 200px;
    height: 8px;
    background: rgba(255,255,255,0.1);
    border-radius: 4px;
    margin: 4px auto;
    overflow: hidden;
}
.results-xp-fill {
    height: 100%;
    background: linear-gradient(90deg, #ffd700, #ff6b35);
    border-radius: 4px;
    transition: width 0.05s linear;
    box-shadow: 0 0 8px rgba(255,215,0,0.4);
}
.results-xp-label {
    font-size: 0.75rem;
    color: #aaa;
}
.results-bonus {
    color: #ffd700;
    font-size: 1.1rem;
    animation: level-up-glow 1s ease-in-out infinite alternate;
}
.results-time {
    font-size: 1rem;
    color: #aaa;
}
.new-best-badge {
    display: inline-block;
    background: linear-gradient(135deg, #ffd700, #ff6b35);
    color: #000;
    font-weight: 800;
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 10px;
    animation: new-best-pulse 0.6s ease-in-out 3;
    vertical-align: middle;
}
@keyframes new-best-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); }
}
.results-medal {
    font-size: 1.1rem;
    font-weight: 700;
    margin: 4px 0;
    animation: medal-shine 1s ease-in-out;
}
.results-medal.gold { color: #ffd700; text-shadow: 0 0 8px rgba(255,215,0,0.5); }
.results-medal.silver { color: #c0c0c0; text-shadow: 0 0 8px rgba(192,192,192,0.5); }
.results-medal.bronze { color: #cd7f32; text-shadow: 0 0 8px rgba(205,127,50,0.5); }
@keyframes medal-shine {
    0% { transform: scale(0.5); opacity: 0; }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); opacity: 1; }
}

.results-buttons {
    display: flex;
    gap: 16px;
    margin-top: 4px;
}

/* Level Up Banner */
.level-up-banner {
    background: linear-gradient(135deg, rgba(255,215,0,0.2), rgba(233,69,96,0.2));
    border: 2px solid #ffd700;
    border-radius: 16px;
    padding: 10px 24px;
    text-align: center;
    animation: level-up-glow 1s ease-in-out infinite alternate;
}

.level-up-text {
    font-size: 1.4rem;
    font-weight: 900;
    color: #ffd700;
    text-transform: uppercase;
    letter-spacing: 3px;
}

.level-up-level {
    font-size: 1rem;
    color: #fff;
    margin-top: 2px;
}

@keyframes level-up-glow {
    0% { box-shadow: 0 0 10px rgba(255,215,0,0.3); }
    100% { box-shadow: 0 0 25px rgba(255,215,0,0.6); }
}

/* V18: Removed dead .achievement-popup and .new-achievements (first copy) */

/* V8: Achievement toast */
.achievement-toast {
    display: flex;
    align-items: center;
    gap: 10px;
    background: linear-gradient(135deg, rgba(155,89,182,0.25), rgba(233,69,96,0.15));
    border: 2px solid #9b59b6;
    border-radius: 14px;
    padding: 10px 16px;
    margin-bottom: 6px;
    opacity: 0;
    transform: translateX(-30px);
    animation: ach-toast-in 0.5s ease-out forwards;
}
.achievement-toast-icon {
    font-size: 2rem;
    flex-shrink: 0;
    animation: ach-icon-bounce 0.6s ease-out 0.3s both;
}
.achievement-toast-info {
    text-align: left;
}
.achievement-toast-label {
    font-size: 0.6rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #9b59b6;
    font-weight: 700;
}
.achievement-toast-name {
    font-size: 1rem;
    font-weight: 800;
    color: #d4a5e8;
}
.achievement-toast-desc {
    font-size: 0.7rem;
    color: #aaa;
}
@keyframes ach-toast-in {
    0% { opacity: 0; transform: translateX(-30px) scale(0.9); }
    60% { transform: translateX(5px) scale(1.02); }
    100% { opacity: 1; transform: translateX(0) scale(1); }
}
@keyframes ach-icon-bounce {
    0% { transform: scale(0.3) rotate(-20deg); }
    50% { transform: scale(1.3) rotate(5deg); }
    100% { transform: scale(1) rotate(0); }
}

#celebration-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 15;
}

/* ===== GARAGE ===== */
.star-count {
    font-size: 1.2rem;
    font-weight: 700;
    color: #ffd700;
}

.garage-tabs {
    display: flex;
    gap: 0;
    background: rgba(0,0,0,0.3);
    padding: 0 20px;
}

.garage-tab {
    flex: 1;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    color: #aaa;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 700;
    padding: 10px 16px;
    cursor: pointer;
    transition: color 0.2s, border-color 0.2s;
}

.garage-tab.active {
    color: #fff;
    border-bottom-color: #e94560;
}

.garage-content {
    display: flex;
    flex: 1;
    padding: 16px 20px;
    gap: 20px;
    overflow: hidden;
}

.garage-preview {
    flex: 0 0 320px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.3);
    border-radius: 24px;
    padding: 16px;
}

.garage-stat-bars {
    display: flex;
    gap: 12px;
    margin-top: 8px;
}

.mini-stat {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.7rem;
    font-weight: 700;
    color: #aaa;
}

.mini-bar {
    width: 40px;
    height: 6px;
    background: rgba(255,255,255,0.15);
    border-radius: 3px;
    overflow: hidden;
}

.mini-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.3s;
}

.garage-panel {
    flex: 1;
    overflow-y: auto;
}

.garage-options {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    align-content: start;
}

.garage-item {
    background: rgba(255,255,255,0.05);
    border: 2px solid rgba(255,255,255,0.15);
    border-radius: 16px;
    padding: 12px;
    text-align: center;
    cursor: pointer;
    transition: transform 0.1s, border-color 0.2s;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.garage-item:active {
    transform: scale(0.95);
}

.garage-item.selected {
    border-color: #e94560;
    background: rgba(233, 69, 96, 0.15);
}

.garage-item.locked {
    opacity: 0.4;
}

.garage-item .color-swatch {
    width: 48px;
    height: 32px;
    border-radius: 8px;
    border: 2px solid rgba(255,255,255,0.3);
}

.garage-item .item-label {
    font-size: 0.8rem;
    font-weight: 600;
}

.garage-item .item-cost {
    font-size: 0.75rem;
    color: #ffd700;
}

/* ===== GARAGE UPGRADES ===== */
.garage-upgrades {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.upgrade-card {
    background: rgba(255,255,255,0.05);
    border: 2px solid rgba(255,255,255,0.15);
    border-radius: 16px;
    padding: 14px 18px;
}

.upgrade-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 4px;
}

.upgrade-icon {
    font-size: 1.3rem;
}

.upgrade-name {
    font-size: 1.1rem;
    font-weight: 700;
}

.upgrade-desc {
    font-size: 0.8rem;
    color: #aaa;
    margin-bottom: 8px;
}

.upgrade-level {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.upgrade-dots {
    display: flex;
    gap: 4px;
}

.upgrade-dot {
    width: 20px;
    height: 8px;
    border-radius: 4px;
    background: rgba(255,255,255,0.15);
}

.upgrade-dot.filled {
    box-shadow: 0 0 6px rgba(255,255,255,0.3);
}

.upgrade-level-text {
    font-size: 0.85rem;
    color: #aaa;
    font-weight: 600;
}

.upgrade-btn {
    width: 100%;
    padding: 10px;
    border: 2px solid rgba(255,255,255,0.2);
    border-radius: 12px;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.1s;
    text-transform: uppercase;
}

.upgrade-btn.can-afford {
    background: linear-gradient(135deg, #e94560, #c81d4e);
    color: #fff;
    border-color: #e94560;
}

.upgrade-btn.can-afford:active {
    transform: scale(0.97);
}

.upgrade-btn.cant-afford {
    background: rgba(255,255,255,0.05);
    color: #999; /* V18: Improved contrast (was #666) */
    cursor: not-allowed;
}

.upgrade-btn.maxed {
    background: rgba(46,204,113,0.15);
    color: #2ecc71;
    border-color: rgba(46,204,113,0.4);
    cursor: default;
}

/* ===== GARAGE ACHIEVEMENTS (Trophy Case) ===== */
.trophy-case {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.trophy-item {
    background: rgba(255,255,255,0.05);
    border: 2px solid rgba(255,255,255,0.1);
    border-radius: 14px;
    padding: 12px;
    text-align: center;
    position: relative;
    transition: border-color 0.2s;
}

.trophy-item.earned {
    border-color: rgba(155,89,182,0.5);
    background: rgba(155,89,182,0.1);
}

.trophy-item.locked {
    opacity: 0.5; /* V18: Improved contrast (was 0.35) */
}

.trophy-icon {
    font-size: 1.8rem;
    margin-bottom: 4px;
}

.trophy-name {
    font-size: 0.85rem;
    font-weight: 700;
}

.trophy-desc {
    font-size: 0.85rem;
    color: #aaa;
    margin-top: 2px;
}

.trophy-check {
    position: absolute;
    top: 6px;
    right: 8px;
    font-size: 0.8rem;
    color: #2ecc71;
    font-weight: 900;
}

/* ===== V16: RAINBOW SWATCH ANIMATION ===== */
.rainbow-swatch {
    background: linear-gradient(90deg, #ff0000, #ff8800, #ffff00, #00ff00, #0088ff, #8800ff, #ff0088);
    background-size: 300% 100%;
    animation: rainbow-shift 2s linear infinite;
}

@keyframes rainbow-shift {
    0% { background-position: 0% 50%; }
    100% { background-position: 300% 50%; }
}

/* ===== V16: MODS SYSTEM ===== */
.mod-category-header {
    font-size: 1rem;
    font-weight: 700;
    color: #ffd700;
    padding: 8px 4px 4px;
    margin-top: 8px;
}

.mod-category-header:first-child {
    margin-top: 0;
}

.mod-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    margin-bottom: 8px;
}

.mod-card {
    background: rgba(255,255,255,0.05);
    border: 2px solid rgba(255,255,255,0.1);
    border-radius: 12px;
    padding: 10px;
    text-align: center;
    transition: border-color 0.2s, background 0.2s;
}

.mod-card.active {
    border-color: rgba(46,204,113,0.6);
    background: rgba(46,204,113,0.1);
}

.mod-card.owned {
    border-color: rgba(52,152,219,0.4);
}

.mod-icon {
    font-size: 1.6rem;
    margin-bottom: 2px;
}

.mod-name {
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 2px;
}

.mod-desc {
    font-size: 0.65rem;
    color: #aaa;
    margin-bottom: 6px;
    line-height: 1.2;
}

.mod-status {
    font-size: 0.7rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.mod-status.active {
    color: #2ecc71;
}

.mod-status.owned {
    color: #3498db;
}

.mod-btn {
    border: none;
    border-radius: 8px;
    padding: 5px 12px;
    font-size: 0.75rem;
    font-weight: 700;
    cursor: pointer;
    font-family: inherit;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: transform 0.1s;
}

.mod-btn:active {
    transform: scale(0.95);
}

.mod-buy.can-afford {
    background: linear-gradient(135deg, #ffd700, #f0a500);
    color: #1a1a2e;
}

.mod-buy.cant-afford {
    background: rgba(255,255,255,0.1);
    color: #999; /* V18: Improved contrast (was #666) */
    cursor: not-allowed;
}

.mod-enable {
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: #fff;
}

.mod-toggle {
    background: rgba(46,204,113,0.2);
    color: #2ecc71;
    border: 1px solid rgba(46,204,113,0.4);
}

/* ===== ROAD TRIP MAP ===== */
/* V24: Story Mode Styles */
.story-tabs {
    display: flex;
    gap: 4px;
    padding: 4px 20px;
    justify-content: center;
}

.story-tab {
    background: rgba(255,255,255,0.06);
    border: 2px solid rgba(233, 69, 96, 0.2);
    border-radius: 20px;
    color: #aaa;
    padding: 6px 20px;
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.15s;
    font-family: inherit;
}

.story-tab-active {
    background: linear-gradient(135deg, #e94560, #c73050);
    border-color: #ffd700;
    color: #fff;
}

.story-panel {
    flex: 1;
    overflow-y: auto;
    padding: 12px 20px;
}

.story-landmarks {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-bottom: 12px;
    font-size: 1.8rem;
    min-height: 40px;
}

.story-landmark {
    opacity: 0.25;
    filter: grayscale(1);
    transition: all 0.3s;
}

.story-landmark.earned {
    opacity: 1;
    filter: none;
    animation: landmark-pop 0.5s ease;
}

@keyframes landmark-pop {
    0% { transform: scale(0.5); }
    50% { transform: scale(1.3); }
    100% { transform: scale(1); }
}

.story-chapters {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.story-chapter-card {
    background: linear-gradient(135deg, #16213e, #0f3460);
    border: 2px solid rgba(233, 69, 96, 0.3);
    border-radius: 16px;
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 16px;
    cursor: pointer;
    transition: transform 0.15s, border-color 0.15s;
}

.story-chapter-card:active {
    transform: scale(0.97);
}

.story-chapter-card.current {
    border-color: #ffd700;
    box-shadow: 0 0 16px rgba(255, 215, 0, 0.2);
}

.story-chapter-card.completed {
    border-color: #4caf50;
}

.story-chapter-card.locked {
    opacity: 0.4;
    cursor: not-allowed;
}

.story-chapter-icon {
    font-size: 2.2rem;
    min-width: 50px;
    text-align: center;
}

.story-chapter-info {
    flex: 1;
}

.story-chapter-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
}

.story-chapter-desc {
    font-size: 0.8rem;
    color: #aaa;
    margin-top: 2px;
}

.story-chapter-progress {
    display: flex;
    gap: 6px;
    margin-top: 6px;
}

.story-race-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.2);
}

.story-race-dot.done {
    background: #4caf50;
    border-color: #4caf50;
}

.story-race-dot.active {
    background: #ffd700;
    border-color: #ffd700;
    animation: dot-pulse 1s infinite;
}

@keyframes dot-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.3); }
}

.story-chapter-badge {
    font-size: 1.5rem;
    min-width: 36px;
    text-align: center;
}

/* Story Card Overlay */
.story-card-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.story-card {
    background: linear-gradient(135deg, #1a1a2e, #16213e);
    border: 3px solid #ffd700;
    border-radius: 24px;
    padding: 32px;
    text-align: center;
    max-width: 500px;
    width: 90%;
    box-shadow: 0 0 40px rgba(255, 215, 0, 0.3);
}

.story-card-icon {
    font-size: 4rem;
    margin-bottom: 16px;
}

.story-card-text {
    font-size: 1.2rem;
    color: #fff;
    line-height: 1.5;
    margin-bottom: 24px;
}

.story-card-btn {
    font-size: 1.2rem;
    padding: 14px 40px;
}

.map-container {
    flex: 1;
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(180deg, #0f3460 0%, #1a1a2e 100%);
}

.map-road {
    display: flex;
    align-items: center;
    gap: 0;
    width: 100%;
    max-width: 900px;
    position: relative;
}

.map-stop {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    flex: 1;
    position: relative;
    z-index: 2;
    cursor: pointer;
}

.map-stop .stop-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    border: 3px solid rgba(255,255,255,0.3);
    background: #16213e;
    transition: transform 0.2s, box-shadow 0.2s;
}

.map-stop.unlocked .stop-icon {
    border-color: #2ecc71;
    box-shadow: 0 0 15px rgba(46, 204, 113, 0.4);
}

.map-stop.current .stop-icon {
    border-color: #ffd700;
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.5);
    transform: scale(1.1);
    animation: map-pulse 1.5s infinite;
}

.map-stop.locked .stop-icon {
    opacity: 0.4;
}
.map-stop.secret.unlocked .stop-icon,
.map-stop.secret.current .stop-icon {
    animation: secret-glow 2s ease-in-out infinite;
}
.map-stop.secret.locked .stop-name {
    color: #999; /* V18: Improved contrast (was #666) */
    font-style: italic;
}
@keyframes secret-glow {
    0%, 100% { text-shadow: 0 0 6px rgba(138,43,226,0.5); }
    50% { text-shadow: 0 0 14px rgba(138,43,226,0.9), 0 0 20px rgba(75,0,130,0.5); }
}

.map-stop .stop-name {
    font-size: 0.85rem;
    text-align: center;
    font-weight: 600;
    max-width: 90px;
}
.map-stop .stop-stars {
    font-size: 0.85rem;
    text-align: center;
}
.map-stop .stop-hint {
    font-size: 0.65rem;
    color: #e94560;
    text-align: center;
    opacity: 0.8;
}
.map-stop .stop-best {
    font-size: 0.6rem;
    color: #aaa;
    margin-top: 1px;
}

.map-line {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 4px;
    background: rgba(255,255,255,0.15);
    z-index: 1;
    transform: translateY(-14px);
}

.map-line-filled {
    height: 100%;
    background: linear-gradient(90deg, #2ecc71, #ffd700);
    transition: width 0.5s;
}

@keyframes map-pulse {
    0%, 100% { box-shadow: 0 0 20px rgba(255, 215, 0, 0.5); }
    50% { box-shadow: 0 0 35px rgba(255, 215, 0, 0.8); }
}

/* ===== PARENT DASHBOARD ===== */
.parent-content {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
    user-select: text; /* Allow text selection in parent dashboard */
}

.dashboard-section {
    background: rgba(0,0,0,0.3);
    border-radius: 16px;
    padding: 16px 20px;
}

.dashboard-section h3 {
    font-size: 1.1rem;
    color: #e94560;
    margin-bottom: 12px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    padding-bottom: 8px;
}

.focus-section {
    border: 1px solid rgba(233,69,96,0.3);
}

.stat-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 0;
    font-size: 0.95rem;
}

.stat-row .stat-label {
    color: #aaa;
}

.stat-row .stat-value {
    font-weight: 700;
}

.accuracy-bar {
    width: 100px;
    height: 8px;
    background: rgba(255,255,255,0.15);
    border-radius: 4px;
    overflow: hidden;
    display: inline-block;
    margin-left: 8px;
    vertical-align: middle;
}

.accuracy-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.3s;
}

.accuracy-fill.high { background: #2ecc71; }
.accuracy-fill.medium { background: #f39c12; }
.accuracy-fill.low { background: #e74c3c; }

/* V27: Old trend-chart CSS kept for backwards compat but no longer used */
.trend-chart { display: flex; align-items: flex-end; gap: 6px; height: 70px; padding: 4px 0; }
.trend-bar { flex: 1; min-width: 20px; border-radius: 4px 4px 0 0; position: relative; }
.trend-bar.high { background: #2ecc71; }
.trend-bar.medium { background: #f39c12; }
.trend-bar.low { background: #e74c3c; }
.trend-label { position: absolute; top: -16px; left: 50%; transform: translateX(-50%); font-size: 0.6rem; color: #aaa; }

/* V27: Dashboard alert banner */
.dashboard-alert {
    background: rgba(231, 76, 60, 0.15);
    border: 1px solid rgba(231, 76, 60, 0.4);
    border-radius: 12px;
    padding: 12px 16px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.dashboard-alert-icon { font-size: 1.4rem; }
.dashboard-alert-text { font-size: 0.9rem; color: #f5c6cb; }
.dashboard-alert-text strong { color: #e74c3c; }

/* V27: Session summary card */
.session-summary { border: 1px solid rgba(46, 204, 113, 0.25); }
.session-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    text-align: center;
}
.session-stat {
    background: rgba(255,255,255,0.05);
    border-radius: 10px;
    padding: 10px 6px;
}
.session-stat-value {
    font-size: 1.3rem;
    font-weight: 800;
    color: #ffd700;
}
.session-stat-label {
    font-size: 0.7rem;
    color: #aaa;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 2px;
}

/* V27: Share Progress button */
.btn-share-progress {
    background: rgba(52, 152, 219, 0.2);
    color: #3498db;
    border: 1px solid rgba(52, 152, 219, 0.4);
    padding: 10px 24px;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s;
}
.btn-share-progress:hover { background: rgba(52, 152, 219, 0.35); }

.btn-reset-data {
    background: rgba(231, 76, 60, 0.2);
    color: #e74c3c;
    border: 1px solid rgba(231, 76, 60, 0.4);
    padding: 10px 20px;
    border-radius: 12px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    align-self: center;
    margin-top: 12px;
    font-family: inherit;
}

/* ===== V28: SCREEN SLIDE TRANSITIONS ===== */
.screen.screen-exit {
    animation: screen-slide-out-left 0.3s ease forwards;
}
.screen.screen-enter {
    animation: screen-slide-in-right 0.3s ease forwards;
}
/* Reverse direction when going back to title */
.screen.screen-exit-right {
    animation: screen-slide-out-right 0.3s ease forwards;
}
.screen.screen-enter-left {
    animation: screen-slide-in-left 0.3s ease forwards;
}

@keyframes screen-slide-out-left {
    0% { opacity: 1; transform: translateX(0); }
    100% { opacity: 0; transform: translateX(-8%); }
}
@keyframes screen-slide-in-right {
    0% { opacity: 0; transform: translateX(8%); }
    100% { opacity: 1; transform: translateX(0); }
}
@keyframes screen-slide-out-right {
    0% { opacity: 1; transform: translateX(0); }
    100% { opacity: 0; transform: translateX(8%); }
}
@keyframes screen-slide-in-left {
    0% { opacity: 0; transform: translateX(-8%); }
    100% { opacity: 1; transform: translateX(0); }
}

/* ===== V3: ANIMATED RESULTS STARS ===== */
.result-star {
    display: inline-block;
    font-size: 3rem;
    opacity: 0.3;
    transition: opacity 0.3s;
}

.result-star.star-earned {
    opacity: 0;
    animation: star-reveal 0.5s forwards;
}

@keyframes star-reveal {
    0% { opacity: 0; transform: scale(0.3); }
    50% { opacity: 1; transform: scale(1.4); }
    70% { transform: scale(0.9); }
    100% { opacity: 1; transform: scale(1); }
}

/* ===== V3: STREAK DISPLAY ===== */
.title-streak {
    font-size: 1rem;
    font-weight: 700;
    color: #ffd700;
    display: none;
    text-align: center;
}

.streak-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: linear-gradient(135deg, rgba(255,100,0,0.25), rgba(255,215,0,0.15));
    border: 1px solid rgba(255,215,0,0.3);
    border-radius: 20px;
    padding: 3px 14px;
}

.streak-flame {
    display: inline-block;
    animation: flame-pulse 0.8s ease-in-out infinite alternate;
    font-size: 1.2em;
}

.streak-days {
    display: inline-flex;
    gap: 3px;
    margin-left: 4px;
}

.streak-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255,215,0,0.2);
    border: 1px solid rgba(255,215,0,0.3);
}

.streak-dot.filled {
    background: #ffd700;
    box-shadow: 0 0 4px rgba(255,215,0,0.5);
}

@keyframes flame-pulse {
    0% { transform: scale(1); }
    100% { transform: scale(1.3); }
}

/* ===== V3: DAILY CHALLENGE ===== */
.title-daily {
    margin: 2px 0;
}

.daily-badge {
    display: inline-block;
    background: linear-gradient(135deg, rgba(233,69,96,0.3), rgba(255,215,0,0.2));
    border: 2px solid rgba(255,215,0,0.5);
    border-radius: 12px;
    padding: 6px 16px;
    font-size: 0.85rem;
    font-weight: 700;
    color: #fff;
    cursor: pointer;
    animation: daily-glow 2s ease-in-out infinite alternate;
}

.daily-badge:active {
    transform: scale(0.95);
}

.daily-bonus {
    color: #ffd700;
    margin-left: 4px;
}

.daily-done {
    font-size: 0.85rem;
    color: #2ecc71;
    font-weight: 600;
}

@keyframes daily-glow {
    0% { box-shadow: 0 0 8px rgba(255,215,0,0.2); }
    100% { box-shadow: 0 0 16px rgba(255,215,0,0.5); }
}

/* ===== V3: RANK-UP BANNER ===== */
.level-up-banner.rank-up {
    background: linear-gradient(135deg, rgba(255,215,0,0.3), rgba(233,69,96,0.3));
    border: 3px solid #ffd700;
    animation: rank-up-glow 0.8s ease-in-out infinite alternate;
}

@keyframes rank-up-glow {
    0% { box-shadow: 0 0 15px rgba(255,215,0,0.4); }
    100% { box-shadow: 0 0 35px rgba(255,215,0,0.8); }
}

/* ===== V4: SETTINGS SCREEN ===== */
.settings-content {
    flex: 1;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    overflow-y: auto;
}

.settings-group {
    width: 100%;
    max-width: 500px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.settings-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(255,255,255,0.05);
    border: 2px solid rgba(255,255,255,0.15);
    border-radius: 16px;
    padding: 14px 18px;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
}

.settings-item:active {
    transform: scale(0.98);
}

.settings-item.on {
    border-color: rgba(46, 204, 113, 0.5);
}

.settings-item.off {
    border-color: rgba(255,255,255,0.1);
    opacity: 0.7;
}

.settings-item-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.settings-item-icon {
    font-size: 1.5rem;
}

.settings-item-label {
    font-size: 1rem;
    font-weight: 700;
}

.settings-item-desc {
    font-size: 0.75rem;
    color: #ccc; /* V18: Improved contrast (was #aaa, ~3.5:1 → ~5:1) */
    margin-top: 2px;
}

.settings-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
}

.toggle-track {
    width: 60px;  /* V17: Larger touch target for kids */
    height: 40px;
    background: rgba(255,255,255,0.15);
    border-radius: 20px;
    position: relative;
    transition: background 0.2s;
    cursor: pointer;
}

.settings-item.on .toggle-track {
    background: #2ecc71;
}

.toggle-thumb {
    width: 34px;  /* V17: Larger thumb to match */
    height: 34px;
    background: #fff;
    border-radius: 50%;
    position: absolute;
    top: 3px;
    left: 3px;
    transition: left 0.2s;
}

.settings-item.on .toggle-thumb {
    left: 23px; /* 60 - 34 - 3 = 23 */
}

.toggle-status {
    font-size: 0.8rem;
    font-weight: 700;
    min-width: 28px;
}

.settings-item.on .toggle-status {
    color: #2ecc71;
}

.settings-item.off .toggle-status {
    color: #bbb; /* V18: Improved contrast (was #888) */
}

.settings-hint {
    font-size: 0.85rem;
    color: #bbb; /* V18: Improved contrast (was #888) */
    text-align: center;
    padding: 8px 16px;
    border: 1px dashed rgba(255,255,255,0.15);
    border-radius: 12px;
    max-width: 400px;
}

/* V11: Grade selector buttons */
.grade-btn {
    flex: 1;
    padding: 10px 12px;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: 10px;
    border: 2px solid rgba(255,255,255,0.2);
    background: rgba(255,255,255,0.05);
    color: #aaa;
    cursor: pointer;
    transition: all 0.2s;
}
.grade-btn.grade-active {
    border-color: #ffd700;
    background: rgba(255,215,0,0.15);
    color: #ffd700;
}

/* ===== V4: TUTORIAL OVERLAY ===== */
.tutorial-overlay {
    position: absolute;
    bottom: 60px;
    left: 0;
    right: 0;
    display: flex;
    justify-content: center;
    z-index: 15;
    pointer-events: auto;
    animation: tutorial-slide-in 0.3s ease-out;
}

.tutorial-bubble {
    background: rgba(0, 0, 0, 0.9);
    border: 2px solid #ffd700;
    border-radius: 16px;
    padding: 14px 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    max-width: 85%;
    animation: tutorial-pulse 1s ease-in-out infinite alternate;
}

.tutorial-icon {
    font-size: 1.8rem;
}

.tutorial-text {
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
    text-align: center;
}

.tutorial-hint {
    font-size: 0.8rem;
    color: #ffd700;
    opacity: 0.8;
}

.tutorial-skip {
    background: transparent;
    border: 1px solid rgba(255,255,255,0.3);
    color: rgba(255,255,255,0.6);
    padding: 4px 12px;
    border-radius: 8px;
    font-size: 0.75rem;
    cursor: pointer;
    margin-top: 4px;
}

/* V5.7: Session break suggestion */
.break-suggestion {
    background: rgba(46, 204, 113, 0.15);
    border: 1px solid rgba(46, 204, 113, 0.4);
    border-radius: 12px;
    padding: 10px 16px;
    font-size: 0.9rem;
    color: #a8e6cf;
    text-align: center;
    margin-top: 8px;
}

@keyframes tutorial-slide-in {
    0% { opacity: 0; transform: translateY(20px); }
    100% { opacity: 1; transform: translateY(0); }
}

@keyframes tutorial-pulse {
    0% { box-shadow: 0 0 8px rgba(255,215,0,0.3); }
    100% { box-shadow: 0 0 20px rgba(255,215,0,0.6); }
}

/* ===== V4: CAR TYPES GRID ===== */
.car-category-header {
    font-size: 1rem;
    font-weight: 700;
    color: #ffd700;
    margin: 14px 0 6px 0;
    padding-bottom: 4px;
    border-bottom: 1px solid rgba(255,215,0,0.2);
}

.car-category-header:first-child {
    margin-top: 0;
}

.car-types-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin-bottom: 8px;
}

.car-type-card {
    background: rgba(255,255,255,0.05);
    border: 2px solid rgba(255,255,255,0.15);
    border-radius: 12px;
    padding: 8px 6px;
    text-align: center;
    cursor: pointer;
    transition: transform 0.1s, border-color 0.2s;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.car-type-card:active {
    transform: scale(0.95);
}

.car-type-card.selected {
    border-color: #e94560;
    background: rgba(233, 69, 96, 0.15);
}

.car-type-card.locked {
    opacity: 0.5;
    cursor: pointer;
    position: relative;
}

.car-type-card.locked::after {
    content: '🔒';
    position: absolute;
    top: 8px;
    right: 8px;
    font-size: 1.2rem;
}

.car-type-card.locked.shake {
    animation: card-shake 0.4s ease-out;
}

@keyframes card-shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-6px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(4px); }
}

.car-type-icon {
    font-size: 2rem;
}

.car-type-name {
    font-size: 0.95rem;
    font-weight: 700;
}

.car-type-desc {
    font-size: 0.7rem;
    color: #aaa;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 600px) {
    .game-title { font-size: 2rem; }
    .title-accent { font-size: 1.4rem; }
    .title-buttons { flex-direction: column; gap: 12px; }
    .btn-large { min-width: 180px; padding: 14px 30px; font-size: 1.1rem; }
    .question-text { font-size: 1.3rem; }
    .answer-btn { font-size: 1.1rem; padding: 12px; }
    .answers-grid { gap: 8px; }
    .garage-content { flex-direction: column; }
    .garage-preview { flex: 0 0 auto; }
    .trophy-case { grid-template-columns: 1fr 1fr; }
}

@media (max-height: 650px) {
    .game-title { font-size: 2rem; }
    .title-accent { font-size: 1.4rem; }
    .title-subtitle { font-size: 0.8rem; margin-bottom: 4px; }
    .title-corvette { height: 60px; margin: 4px 0; }
    .title-bg { gap: 6px; padding: 12px; }
    .title-buttons { gap: 12px; }
    .btn-large { padding: 10px 28px; font-size: 1rem; min-height: 44px; min-width: 180px; }
    .btn-small { padding: 8px 14px; font-size: 0.8rem; }
    .question-box { padding: 14px 18px; }
    .question-text { font-size: 1.2rem; margin-bottom: 10px; min-height: 30px; }
    .answer-btn { padding: 10px; font-size: 1.1rem; min-height: 44px; }
    .answers-grid { gap: 8px; }
    .results-title { font-size: 1.6rem; }
    .results-stars { font-size: 2.2rem; margin: 4px 0; }
    .results-content { gap: 8px; }
    .explanation-bubble { font-size: 0.85rem; padding: 8px 12px; margin-top: 8px; }
    .garage-preview { flex: 0 0 250px; }
    .upgrade-card { padding: 10px 14px; }
    .trophy-case { grid-template-columns: repeat(3, 1fr); gap: 8px; }
    .trophy-icon { font-size: 1.4rem; }
    .trophy-name { font-size: 0.75rem; }
    .trophy-desc { font-size: 0.75rem; }
    .level-up-banner { padding: 8px 16px; }
    .level-up-text { font-size: 1.1rem; }
}

/* ===== COMPACT RESULTS FOR LANDSCAPE TABLETS (≤650px height) ===== */
@media (max-height: 650px) {
    /* Container: tight padding and minimal gaps */
    .results-content { padding: 4px 16px 6px; gap: 2px; }

    /* Title: compact */
    .results-title { font-size: 1.2rem; margin: 0; }

    /* Podium: scale down to fit — saves ~50px vertical */
    .podium-container {
        transform: scale(0.6);
        transform-origin: top center;
        margin-bottom: -50px !important;
        margin-top: -4px;
    }

    /* Stars: much smaller */
    .results-stars { font-size: 1.4rem; margin: 0; line-height: 1.2; }

    /* Stats box: compress everything inside */
    .results-stats { padding: 4px 12px; font-size: 0.85rem; }
    .results-answers { gap: 2px; margin-bottom: 2px; }
    .answer-dot { width: 24px; height: 24px; font-size: 0.75rem; }
    .results-streak { font-size: 0.85rem; margin: 1px 0; }
    .results-time { font-size: 0.85rem; margin: 1px 0; }
    .results-medal { font-size: 0.9rem; margin: 1px 0; }
    .results-xp { font-size: 0.95rem; }
    .results-xp-bar { width: 160px; height: 6px; margin: 2px auto; }
    .results-xp-label { font-size: 0.65rem; }
    .results-bonus { font-size: 0.85rem; margin: 1px 0; }
    .results-xp-section { margin: 2px 0; }

    /* Achievement toasts: compact */
    .results-achievements { margin: 0; }
    .achievement-toast { padding: 4px 8px; font-size: 0.8rem; }

    /* Buttons: slightly smaller but still tappable */
    .results-buttons { gap: 8px; margin-top: 2px; }
    .results-buttons .btn-large { padding: 8px 20px; font-size: 0.9rem; min-height: 40px; }
    .btn-same-race { padding: 6px 14px !important; font-size: 0.8rem !important; }

    /* Level up and break banners */
    .level-up-banner { padding: 4px 10px; margin: 1px 0; font-size: 0.85rem; }
    .level-up-text { font-size: 0.9rem; }
    .break-suggestion { padding: 4px 8px; font-size: 0.75rem; }

    /* Weekly progress if visible */
    .weekly-challenge-results { padding: 3px 8px; font-size: 0.75rem; margin: 1px 0; }
}

/* ===== LANDSCAPE LOCK HINT ===== */
@media (orientation: portrait) {
    #game-container::before {
        content: '📱 Rotate your device for the best experience!';
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: #e94560;
        color: #fff;
        text-align: center;
        padding: 10px;
        font-size: 0.9rem;
        font-weight: 600;
        z-index: 1000;
    }
}

/* ===== GARAGE TOAST ===== */
.garage-toast {
    position: fixed;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.85);
    color: #ffd700;
    padding: 10px 24px;
    border-radius: 20px;
    font-size: 1rem;
    font-weight: 700;
    z-index: 200;
    animation: toast-pop 2.8s ease-out forwards;
    pointer-events: none;
    white-space: nowrap;
}

@keyframes toast-pop {
    0% { opacity: 1; transform: translateX(-50%) scale(1.1); }
    10% { opacity: 1; transform: translateX(-50%) scale(1); }
    80% { opacity: 1; transform: translateX(-50%) scale(1); }
    100% { opacity: 0; transform: translateX(-50%) scale(0.9); }
}

/* ===== SAME RACE AGAIN BUTTON ===== */
.btn-same-race {
    background: #e67e22;
    color: #fff;
    border: none;
    font-size: 0.85rem;
    padding: 8px 16px;
    border-radius: 8px;
    margin-top: 4px;
    cursor: pointer;
    font-weight: 700;
}

/* ===== RACE HISTORY (PARENT DASHBOARD) ===== */
.race-history-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.race-history-item {
    display: grid;
    grid-template-columns: 1fr 60px 72px 40px;
    align-items: center;
    gap: 4px;
    padding: 6px 10px;
    border-radius: 8px;
    background: rgba(255,255,255,0.05);
    font-size: 0.82rem;
}

.race-history-item .rh-stars {
    color: #ffd700;
    font-size: 0.9rem;
    text-align: center;
    white-space: nowrap;
}

.race-history-item .rh-acc {
    font-weight: 700;
    text-align: right;
    white-space: nowrap;
}

.race-history-item .rh-streak {
    text-align: right;
    white-space: nowrap;
}

.race-history-item .rh-acc.high { color: #2ecc71; }
.race-history-item .rh-acc.medium { color: #f1c40f; }
.race-history-item .rh-acc.low { color: #e94560; }

/* ===== PAUSE BUTTON & OVERLAY ===== */
.btn-pause {
    position: absolute;
    top: 8px;
    right: 8px;
    z-index: 50;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 2px solid rgba(255,255,255,0.4);
    background: rgba(0, 0, 0, 0.45);
    color: #fff;
    font-size: 1.3rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}
.btn-pause:active {
    background: rgba(0, 0, 0, 0.7);
}

.pause-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.75);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pause-box {
    background: linear-gradient(135deg, #1a1a2e, #16213e);
    border: 2px solid #e94560;
    border-radius: 16px;
    padding: 32px 48px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 16px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.5);
}
.pause-box h2 {
    color: #fff;
    font-size: 1.8rem;
    letter-spacing: 4px;
    margin: 0;
}

/* ===== V22: SPEAKER / REPLAY BUTTON (larger for kids) ===== */
.btn-speaker {
    position: absolute;
    top: 8px;
    right: 8px;
    background: rgba(255,255,255,0.2);
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    width: 52px;
    height: 52px;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    transition: background 0.15s, transform 0.15s;
}
.btn-speaker:active {
    background: rgba(233,69,96,0.5);
    border-color: #fff;
    transform: scale(1.15);
}
.btn-speaker.speaking {
    animation: speaker-pulse 0.6s ease-in-out 2;
}
@keyframes speaker-pulse {
    0%, 100% { transform: scale(1); background: rgba(255,255,255,0.2); }
    50% { transform: scale(1.12); background: rgba(46,204,113,0.4); }
}

/* ===== DUOLINGO-STYLE ANSWER FEEDBACK ===== */
.answer-btn.correct {
    background: #2ecc71 !important;
    color: #fff !important;
    border-color: #27ae60 !important;
    transform: scale(1.05);
    box-shadow: 0 0 16px rgba(46, 204, 113, 0.5);
}
.answer-btn.wrong {
    background: #e74c3c !important;
    color: #fff !important;
    border-color: #c0392b !important;
    animation: shake-wrong 0.4s ease;
}
@keyframes shake-wrong {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-6px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(4px); }
}
.answer-btn.answered {
    opacity: 0.6;
}
.answer-btn.answered.correct,
.answer-btn.answered.wrong {
    opacity: 1;
}

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ===== HIGH CONTRAST MODE ===== */
body.high-contrast .answer-btn {
    border-width: 3px;
    font-weight: 700;
}
body.high-contrast .answer-btn.correct {
    background: #1a8a4a !important;
    border-color: #fff !important;
    box-shadow: 0 0 0 3px #1a8a4a;
}
body.high-contrast .answer-btn.wrong {
    background: #b71c1c !important;
    border-color: #fff !important;
    box-shadow: 0 0 0 3px #b71c1c;
}
body.high-contrast .btn {
    border: 2px solid rgba(255,255,255,0.6);
}
body.high-contrast .hud-position,
body.high-contrast .hud-streak {
    font-size: 1.1rem;
    text-shadow: 0 0 4px #000;
}

/* ===== BREAK SUGGESTION ===== */
.break-suggestion {
    background: rgba(255, 215, 0, 0.12);
    border: 1px solid rgba(255, 215, 0, 0.3);
    border-radius: 10px;
    padding: 10px 16px;
    margin-top: 8px;
    font-size: 0.85rem;
    color: #ffd700;
    text-align: center;
}

/* V18: Removed dead .achievement-popup and .new-achievements (second copy) */

/* ===== PC RESPONSIVE — LARGER SCREENS ===== */
@media (min-width: 1200px) {
    #game-container {
        max-width: 1400px;
        margin: 0 auto;
    }
    .game-title { font-size: 3.5rem; }
    .title-accent { font-size: 2.5rem; }
    .title-subtitle { font-size: 1.2rem; }
    .title-corvette { width: 360px; height: 100px; }
    .btn-large { font-size: 1.5rem; padding: 18px 48px; }
    .btn-small { font-size: 1rem; padding: 12px 20px; }
    .screen-header h2 { font-size: 1.8rem; }
    .question-box { max-width: 700px; padding: 28px 32px; }
    .question-text { font-size: 2rem; }
    .answer-btn { font-size: 1.5rem; padding: 18px 20px; min-height: 64px; }
    .answers-grid { gap: 16px; }
    .topic-card { padding: 28px; min-height: 130px; }
    .topic-card .topic-icon { font-size: 2.5rem; }
    .topic-card .topic-name { font-size: 1.3rem; }
    .topics-grid { gap: 20px; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
    .map-stop .stop-icon { width: 72px; height: 72px; font-size: 2rem; }
    .map-stop .stop-name { font-size: 1rem; max-width: 120px; }
    .map-stop .stop-stars { font-size: 1rem; }
    .map-stop .stop-hint { font-size: 0.8rem; }
    .map-stop .stop-best { font-size: 0.75rem; }
    .settings-content { max-width: 700px; }
    .settings-item-label { font-size: 1.05rem; }
    .settings-item-desc { font-size: 0.9rem; }
    .parent-content { max-width: 900px; margin: 0 auto; }
    .results-title { font-size: 2.4rem; }
    .results-stars { font-size: 3.2rem; }
    .explanation-bubble { font-size: 1.1rem; }
    .grade-btn { font-size: 1rem; padding: 10px 20px; }
}

@media (min-width: 1600px) {
    .game-title { font-size: 4rem; }
    .title-accent { font-size: 3rem; }
    .title-subtitle { font-size: 1.4rem; }
    .btn-large { font-size: 1.7rem; padding: 22px 56px; }
    .question-box { max-width: 800px; padding: 32px 40px; }
    .question-text { font-size: 2.3rem; }
    .answer-btn { font-size: 1.7rem; padding: 22px 24px; min-height: 72px; }
    .topic-card { padding: 32px; min-height: 150px; }
    .topic-card .topic-icon { font-size: 3rem; }
    .topic-card .topic-name { font-size: 1.5rem; }
    .topics-grid { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
    .map-stop .stop-icon { width: 84px; height: 84px; font-size: 2.4rem; }
    .map-stop .stop-name { font-size: 1.15rem; max-width: 140px; }
    .results-title { font-size: 2.8rem; }
    .results-stars { font-size: 3.6rem; }
}

/* ===== QUICK RACE BUTTON ===== */
.btn-quick-race {
    background: linear-gradient(135deg, #f39c12, #e67e22);
    color: #fff;
    padding: 16px 40px;
    font-size: 1.3rem;
    box-shadow: 0 4px 20px rgba(243, 156, 18, 0.5);
    animation: quick-race-glow 2s ease-in-out infinite;
    border: 2px solid rgba(255, 255, 255, 0.3);
}
@keyframes quick-race-glow {
    0%, 100% { box-shadow: 0 4px 20px rgba(243, 156, 18, 0.4); }
    50% { box-shadow: 0 4px 30px rgba(243, 156, 18, 0.7); }
}

/* ===== WELCOME OVERLAY ===== */
.welcome-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: welcome-fade-in 0.5s ease;
}
@keyframes welcome-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}
@keyframes welcome-fade-out {
    from { opacity: 1; }
    to { opacity: 0; }
}
.welcome-card {
    text-align: center;
    padding: 30px 40px;
    max-width: 500px;
    width: 90%;
}
.welcome-car-emoji {
    font-size: 4rem;
    margin-bottom: 10px;
    animation: welcome-car-bounce 1s ease-in-out infinite;
}
@keyframes welcome-car-bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}
.welcome-title {
    font-size: 2.2rem;
    color: #e94560;
    margin-bottom: 16px;
}
.welcome-text {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.8);
    margin-bottom: 12px;
}
.welcome-input {
    width: 80%;
    max-width: 300px;
    padding: 14px 20px;
    border-radius: 16px;
    border: 2px solid rgba(233, 69, 96, 0.5);
    background: rgba(255,255,255,0.1);
    color: #fff;
    font-size: 1.3rem;
    font-family: inherit;
    text-align: center;
    outline: none;
    margin-bottom: 20px;
}
.welcome-input:focus {
    border-color: #e94560;
    background: rgba(255,255,255,0.15);
}
.welcome-input::placeholder {
    color: rgba(255,255,255,0.4);
}
.welcome-grade-pick {
    margin-bottom: 20px;
}
.welcome-grade-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
}
.btn-welcome-grade {
    background: rgba(255,255,255,0.1);
    border: 2px solid rgba(255,255,255,0.2);
    border-radius: 16px;
    color: #fff;
    padding: 12px 20px;
    font-size: 1.2rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
    min-width: 80px;
}
.btn-welcome-grade small {
    font-size: 0.7rem;
    font-weight: 400;
    opacity: 0.7;
}
.btn-welcome-grade.selected {
    background: linear-gradient(135deg, #e94560, #c81d4e);
    border-color: #e94560;
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(233, 69, 96, 0.4);
}

/* ===== ANSWER BUTTON ENTRANCE ===== */
.answer-btn {
    animation: answer-entrance 0.3s ease-out both;
}
.answer-btn:nth-child(1) { animation-delay: 0.05s; }
.answer-btn:nth-child(2) { animation-delay: 0.1s; }
.answer-btn:nth-child(3) { animation-delay: 0.15s; }
.answer-btn:nth-child(4) { animation-delay: 0.2s; }
@keyframes answer-entrance {
    from { opacity: 0; transform: translateY(12px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

/* ===== CORRECT ANSWER CELEBRATION ===== */
.answer-btn.correct {
    animation: correct-celebrate 0.5s ease !important;
}
@keyframes correct-celebrate {
    0% { transform: scale(1); }
    25% { transform: scale(1.12); }
    50% { transform: scale(0.98); }
    75% { transform: scale(1.05); }
    100% { transform: scale(1.03); }
}