* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
    -webkit-user-select: none;
}

body, html {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: #08090d;
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
    color: #ffffff;
}

#game-container {
    position: relative;
    width: 100%;
    height: 100%;
}

canvas#bg-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: block;
    z-index: 1;
}

/* UI OVERLAYS */
.hidden {
    display: none !important;
}

.ui-screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    pointer-events: auto;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.ui-screen.hidden {
    display: none !important;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

/* MAIN MENU */
#menu-screen {
    background: radial-gradient(circle at center, rgba(14, 21, 37, 0.45) 0%, rgba(6, 8, 14, 0.92) 80%);
}

.menu-content-wrapper {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 4.5rem;
    max-width: 1000px;
    width: 90%;
}

.menu-left-col {
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* PAINEL HOLOGRÁFICO DO LEADERBOARD SEMANAL */
.leaderboard-panel {
    background: rgba(10, 16, 28, 0.85);
    border: 2px solid rgba(0, 210, 255, 0.6);
    border-radius: 14px;
    padding: 1.8rem 2.2rem;
    width: 380px;
    box-shadow: 0 0 30px rgba(0, 210, 255, 0.25), inset 0 0 15px rgba(0, 210, 255, 0.1);
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    animation: glowBorder 3s infinite alternate ease-in-out;
}

.lb-header {
    text-align: center;
    margin-bottom: 1.2rem;
    border-bottom: 1px solid rgba(0, 210, 255, 0.3);
    padding-bottom: 0.8rem;
}

.lb-title {
    font-size: 1.35rem;
    font-weight: 800;
    color: #ffd700;
    letter-spacing: 0.15rem;
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.6);
}

.lb-subtitle {
    font-size: 0.78rem;
    font-weight: 700;
    color: #00d2ff;
    letter-spacing: 0.2rem;
    margin-top: 0.3rem;
}

.lb-list {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.lb-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(18, 26, 45, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    padding: 0.6rem 0.9rem;
    transition: all 0.2s ease;
}

.lb-item:hover {
    background: rgba(0, 210, 255, 0.15);
    border-color: rgba(0, 210, 255, 0.5);
    transform: translateX(4px);
}

.lb-item.first-place {
    border-color: #ffd700;
    background: rgba(255, 215, 0, 0.12);
}

.lb-item.second-place {
    border-color: #cccccc;
    background: rgba(200, 200, 200, 0.1);
}

.lb-item.third-place {
    border-color: #cd7f32;
    background: rgba(205, 127, 50, 0.1);
}

.lb-rank {
    font-size: 1.1rem;
    font-weight: 800;
    width: 32px;
}

.lb-name {
    font-size: 1rem;
    font-weight: 700;
    color: #ffffff;
    flex: 1;
    margin-left: 0.5rem;
    letter-spacing: 0.05rem;
}

.lb-dist {
    font-size: 1.1rem;
    font-weight: 900;
    color: #00d2ff;
    font-variant-numeric: tabular-nums;
    text-shadow: 0 0 8px rgba(0, 210, 255, 0.6);
}

/* SUBMIT SCORE NA TELA DE GAME OVER */
#new-record-box {
    background: rgba(0, 210, 255, 0.12);
    border: 1px solid #00d2ff;
    border-radius: 10px;
    padding: 1.2rem;
    margin-bottom: 1.5rem;
    width: 320px;
    text-align: center;
    box-shadow: 0 0 20px rgba(0, 210, 255, 0.3);
}

.record-badge {
    color: #ffd700;
    font-size: 0.95rem;
    font-weight: 800;
    letter-spacing: 0.1rem;
    margin-bottom: 0.6rem;
    text-shadow: 0 0 10px #ffd700;
    animation: pulseTitle 1.5s infinite alternate ease-in-out;
}

.record-input-row {
    display: flex;
    gap: 0.5rem;
}

.record-input {
    flex: 1;
    background: #0a0e1a;
    border: 1px solid rgba(0, 210, 255, 0.6);
    border-radius: 6px;
    padding: 0.5rem 0.8rem;
    color: #ffffff;
    font-size: 1.05rem;
    font-weight: 700;
    text-transform: uppercase;
    outline: none;
    text-align: center;
}

.record-input:focus {
    border-color: #ffd700;
    box-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
}

.record-btn {
    background: #00d2ff;
    color: #000000;
    border: none;
    border-radius: 6px;
    padding: 0.5rem 0.9rem;
    font-size: 0.95rem;
    font-weight: 800;
    cursor: pointer;
    transition: transform 0.15s ease, background 0.2s ease;
}

.record-btn:hover {
    background: #ffd700;
    transform: scale(1.05);
}

@keyframes glowBorder {
    0% { box-shadow: 0 0 20px rgba(0, 210, 255, 0.2); }
    100% { box-shadow: 0 0 35px rgba(0, 210, 255, 0.45); }
}

.title-container {
    text-align: center;
    margin-bottom: 2.5rem;
    animation: pulseTitle 2.5s infinite alternate ease-in-out;
}

.game-title {
    font-size: 5rem;
    font-weight: 900;
    letter-spacing: 0.35rem;
    color: #fff;
    text-shadow: 0 0 15px #00d2ff, 0 0 35px #00d2ff, 0 0 70px #0066ff;
    line-height: 1.0;
}

.game-subtitle {
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: 0.6rem;
    color: #ffaa00;
    text-shadow: 0 0 10px rgba(255, 170, 0, 0.7);
    margin-top: 0.5rem;
}

.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    width: 280px;
}

.arcade-btn {
    background: linear-gradient(135deg, rgba(20, 28, 48, 0.85) 0%, rgba(12, 17, 30, 0.95) 100%);
    border: 2px solid #00d2ff;
    border-radius: 8px;
    color: #ffffff;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.15rem;
    padding: 0.9rem 1.8rem;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 0 12px rgba(0, 210, 255, 0.25), inset 0 0 8px rgba(0, 210, 255, 0.15);
    outline: none;
}

.arcade-btn:hover {
    background: linear-gradient(135deg, #00d2ff 0%, #0077ff 100%);
    border-color: #ffffff;
    color: #000;
    transform: translateY(-3px) scale(1.03);
    box-shadow: 0 0 25px rgba(0, 210, 255, 0.8), inset 0 0 12px #ffffff;
}

.arcade-btn:active {
    transform: translateY(1px) scale(0.98);
}

.arcade-btn.btn-secondary {
    border-color: #8899aa;
    box-shadow: 0 0 10px rgba(136, 153, 170, 0.2);
}

.arcade-btn.btn-secondary:hover {
    background: linear-gradient(135deg, #8899aa 0%, #556677 100%);
    border-color: #fff;
    color: #000;
    box-shadow: 0 0 20px rgba(136, 153, 170, 0.7);
}

.arcade-btn.btn-danger {
    border-color: #ff3344;
    box-shadow: 0 0 10px rgba(255, 51, 68, 0.25);
}

.arcade-btn.btn-danger:hover {
    background: linear-gradient(135deg, #ff3344 0%, #bb1122 100%);
    border-color: #fff;
    color: #fff;
    box-shadow: 0 0 25px rgba(255, 51, 68, 0.8);
}

/* SETTINGS MODAL */
.modal-overlay {
    background: rgba(4, 6, 10, 0.88);
    backdrop-filter: blur(8px);
}

.modal-card {
    background: #0f1523;
    border: 2px solid #00d2ff;
    border-radius: 12px;
    padding: 2.2rem 2.8rem;
    width: 420px;
    max-width: 90%;
    box-shadow: 0 0 35px rgba(0, 210, 255, 0.35);
}

.modal-title {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: 0.15rem;
    color: #00d2ff;
    text-shadow: 0 0 10px rgba(0, 210, 255, 0.5);
    margin-bottom: 1.8rem;
    text-align: center;
}

.setting-row {
    margin-bottom: 1.4rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.setting-label {
    font-size: 1rem;
    font-weight: 600;
    color: #ccddee;
}

.setting-row input[type="range"] {
    width: 100%;
    accent-color: #00d2ff;
    height: 6px;
    background: #1c263c;
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}

.setting-checkbox {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
}

.setting-checkbox input[type="checkbox"] {
    width: 22px;
    height: 22px;
    accent-color: #00d2ff;
    cursor: pointer;
}

/* HUD (HEADS-UP DISPLAY) */
#hud {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 5;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 1.5rem 2.5rem;
}

.hud-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    width: 100%;
}

/* HUD STAT BOXES */
.hud-stat-box {
    background: rgba(10, 14, 24, 0.75);
    border: 1px solid rgba(0, 210, 255, 0.4);
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    backdrop-filter: blur(5px);
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 130px;
}

/* SISTEMA DE VIDAS (HEARTS) - FASE 2 */
.hud-lives-container {
    display: flex;
    gap: 0.4rem;
    margin-top: 0.35rem;
}

.heart-icon {
    font-size: 1.5rem;
    line-height: 1;
    color: #ff2255;
    filter: drop-shadow(0 0 6px #ff1144);
    transition: transform 0.2s ease, opacity 0.3s ease, filter 0.3s ease;
}

.heart-icon.lost {
    opacity: 0.25;
    filter: grayscale(1) drop-shadow(0 0 0 transparent);
    transform: scale(0.85);
}

.heart-icon.pulse {
    animation: heartRecover 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes heartRecover {
    0% { transform: scale(1); }
    50% { transform: scale(1.45); filter: drop-shadow(0 0 14px #00ff88); color: #00ff88; }
    100% { transform: scale(1); }
}

/* SCREEN SHAKE AO LEVAR DANO */
.shake-screen {
    animation: shakeEffect 0.32s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
}

@keyframes shakeEffect {
    10%, 90% { transform: translate3d(-3px, 1px, 0); }
    20%, 80% { transform: translate3d(4px, -2px, 0); }
    30%, 50%, 70% { transform: translate3d(-5px, 3px, 0); }
    40%, 60% { transform: translate3d(5px, -1px, 0); }
}

.hud-label {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.15rem;
    color: #88aacc;
    text-transform: uppercase;
}

.hud-val {
    font-size: 1.8rem;
    font-weight: 900;
    color: #fff;
    text-shadow: 0 0 10px rgba(0, 210, 255, 0.7);
    font-variant-numeric: tabular-nums;
}

.hud-val.coin-color {
    color: #ffd700;
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.8);
}

.hud-val.stage-color {
    color: #00ffcc;
    text-shadow: 0 0 10px rgba(0, 255, 204, 0.8);
}

/* INDICADOR DA FAIXA / CORREDOR ATUAL */
.hud-lane-indicator {
    background: rgba(10, 14, 24, 0.8);
    border: 1px solid #ffaa00;
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.1rem;
    color: #ffaa00;
    text-shadow: 0 0 8px rgba(255, 170, 0, 0.8);
    margin-top: 0.5rem;
}

.hud-lane-indicator.corridor-active {
    background: rgba(255, 51, 68, 0.25);
    border-color: #ff3344;
    color: #ff5566;
    animation: corridorBlink 0.8s infinite alternate;
}

/* CUTSCENE BANNER */
#cutscene-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    pointer-events: none;
    z-index: 6;
}

.countdown-number {
    font-size: 7rem;
    font-weight: 900;
    color: #ffea00;
    text-shadow: 0 0 25px #ffaa00, 0 0 50px #ff3300;
    animation: countdownZoom 0.9s cubic-bezier(0.1, 0.9, 0.2, 1);
}

.cutscene-tip {
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 0.2rem;
    color: #00d2ff;
    text-shadow: 0 0 12px #00d2ff;
    margin-top: 0.5rem;
}

/* GAME OVER SCREEN */
#gameover-screen {
    background: radial-gradient(circle at center, rgba(30, 5, 10, 0.7) 0%, rgba(8, 2, 4, 0.95) 85%);
}

.gameover-title {
    font-size: 4.5rem;
    font-weight: 900;
    letter-spacing: 0.3rem;
    color: #ff2244;
    text-shadow: 0 0 20px #ff2244, 0 0 45px #ff0022;
    margin-bottom: 1.5rem;
}

.gameover-stats {
    background: rgba(20, 10, 15, 0.8);
    border: 1px solid #ff3355;
    border-radius: 10px;
    padding: 1.5rem 2.5rem;
    width: 320px;
    margin-bottom: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.stat-line {
    display: flex;
    justify-content: space-between;
    font-size: 1.15rem;
    font-weight: 600;
    color: #eebbcc;
}

.stat-line span:last-child {
    font-weight: 900;
    color: #ffffff;
}

.stat-line.highlight span:last-child {
    color: #ffd700;
    text-shadow: 0 0 8px #ffd700;
}

/* ANIMAÇÕES */
@keyframes pulseTitle {
    0% { transform: scale(1); }
    100% { transform: scale(1.03); }
}

@keyframes countdownZoom {
    0% { opacity: 0; transform: scale(0.4); }
    50% { opacity: 1; transform: scale(1.2); }
    100% { opacity: 1; transform: scale(1.0); }
}

@keyframes corridorBlink {
    0% { box-shadow: 0 0 5px rgba(255, 51, 68, 0.3); }
    100% { box-shadow: 0 0 18px rgba(255, 51, 68, 0.9); }
}

/* CONTROLS GUIDE (BOTTOM LEFT) */
.controls-guide {
    background: rgba(10, 14, 24, 0.65);
    border: 1px solid rgba(255, 255, 255, 0.15);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.85rem;
    color: #99aabb;
}

/* VERSÃO DO JOGO (v0.0.1) */
.game-version {
    position: absolute;
    bottom: 1.5rem;
    right: 2.2rem;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.15rem;
    color: #4477aa;
    background: rgba(10, 16, 28, 0.65);
    border: 1px solid rgba(68, 119, 170, 0.35);
    padding: 0.35rem 0.75rem;
    border-radius: 6px;
    pointer-events: none;
    font-family: monospace;
}

/* ALERTA DE PERIGO TRASEIRO (FASE 3) */
.rear-warning-banner {
    position: absolute;
    top: 5.5rem;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(255, 17, 34, 0.9);
    border: 2px solid #ffffff;
    box-shadow: 0 0 25px #ff1122, inset 0 0 10px #ffffff;
    color: #ffffff;
    font-size: 1.15rem;
    font-weight: 900;
    letter-spacing: 0.15rem;
    padding: 0.7rem 1.8rem;
    border-radius: 8px;
    text-align: center;
    z-index: 20;
    animation: rearWarningBlink 0.35s infinite alternate ease-in-out;
}

@keyframes rearWarningBlink {
    0% { transform: translateX(-50%) scale(1); opacity: 0.85; }
    100% { transform: translateX(-50%) scale(1.06); opacity: 1; box-shadow: 0 0 40px #ff0033; }
}

/* CAR SLAM POPUP (FASE 3) */
.slam-popup {
    position: absolute;
    top: 35%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 2.5rem;
    font-weight: 900;
    letter-spacing: 0.2rem;
    color: #ffd700;
    text-shadow: 0 0 15px #ff5500, 0 0 30px #ff2200;
    pointer-events: none;
    z-index: 25;
    animation: slamBounce 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

@keyframes slamBounce {
    0% { opacity: 0; transform: translate(-50%, -30%) scale(0.5); }
    30% { opacity: 1; transform: translate(-50%, -50%) scale(1.25); }
    80% { opacity: 1; transform: translate(-50%, -55%) scale(1.0); }
    100% { opacity: 0; transform: translate(-50%, -70%) scale(0.85); }
}

/* STAGE ANNOUNCEMENT BANNER */
.stage-banner {
    position: absolute;
    top: 28%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    pointer-events: none;
    z-index: 30;
    animation: stageBannerAnim 2.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.stage-banner-title {
    font-size: 3.8rem;
    font-weight: 900;
    letter-spacing: 0.35rem;
    color: #00ffcc;
    text-shadow: 0 0 20px #00d2ff, 0 0 45px #00ffaa;
    text-transform: uppercase;
    white-space: nowrap;
}

.stage-banner-sub {
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: 0.3rem;
    color: #ffea00;
    text-shadow: 0 0 15px rgba(255, 234, 0, 0.8);
    margin-top: 0.2rem;
    text-transform: uppercase;
}

@keyframes stageBannerAnim {
    0% {
        opacity: 0;
        transform: translate(-50%, -35%) scale(0.65);
    }
    18% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1.1);
    }
    28% {
        transform: translate(-50%, -50%) scale(1.0);
    }
    75% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1.0);
    }
    100% {
        opacity: 0;
        transform: translate(-50%, -65%) scale(0.9);
    }
}