/* Snake Theme - Mobile-First */

:root {
    --primary: #4CAF50;
    --secondary: #388E3C;
    --tertiary: #81C784;
    --accent: #CDDC39;
}

/* Background gradient */
body {
    background: linear-gradient(135deg, #E8F5E9 0%, #C8E6C9 100%);
}

/* Decorative background circles */
body::before {
    background: var(--primary);
}

body::after {
    background: var(--secondary);
}

/* Card styling */
.card {
    border-color: var(--primary);
}

.card::before {
    content: '🐍';
}

/* Buttons */
.btn-start {
    background: linear-gradient(135deg, var(--primary), var(--tertiary));
}

.btn-back {
    color: var(--primary);
    border-color: var(--primary);
}

.btn-back:hover {
    background: var(--primary);
    color: white;
}

/* Slider */
input[type="range"]::-webkit-slider-thumb {
    border-color: var(--primary);
}

input[type="range"]::-moz-range-thumb {
    border-color: var(--primary);
}

/* Crown cost label */
.crown-cost,
.game-over-cost {
    text-align: center;
    font-family: 'Fredoka', sans-serif;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--secondary);
    margin-top: 0.5rem;
}

/* Milestone celebration */
.milestone-celebration {
    background: linear-gradient(135deg, var(--primary), var(--secondary)) !important;
    z-index: 99999 !important;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5) !important;
}

/* Game area */
.preview {
    text-align: center;
    position: relative;
}

/* Score display */
.score-display {
    font-family: 'Fredoka', sans-serif;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 1rem;
    text-align: center;
}

#scoreValue {
    color: var(--secondary);
    font-size: 1.6rem;
}

.highscore-label {
    margin-left: 1rem;
}

#highscoreValue {
    color: #B8860B;
    font-size: 1.2rem;
}

.game-over-highscore {
    font-size: 1.1rem;
    font-weight: 600;
    color: #B8860B;
}

/* Canvas */
#snakeCanvas {
    display: block;
    margin: 0 auto;
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    border: 3px solid var(--primary);
    box-shadow: 0 6px 20px rgba(76, 175, 80, 0.25);
    background: #F1F8E9;
    touch-action: none;
}

/* Game over overlay */
.game-over-overlay {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    border-radius: 24px;
    z-index: 10;
    align-items: center;
    justify-content: center;
}

.game-over-overlay.active {
    display: flex;
}

.game-over-content {
    background: white;
    padding: 2rem 2.5rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    animation: bounceIn 0.5s ease-out;
}

.game-over-content h2 {
    font-family: 'Fredoka', sans-serif;
    color: var(--primary);
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

.game-over-content p {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.btn-restart {
    background: linear-gradient(135deg, var(--primary), var(--tertiary));
    color: white;
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 12px;
    font-family: 'Fredoka', sans-serif;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 0.5rem;
    width: auto;
}

.btn-restart:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(76, 175, 80, 0.4);
}

/* === RESPONSIVE === */

/* Small phones (>=360px) */
@media (min-width: 360px) {
    .score-display {
        font-size: 1.5rem;
    }
}

/* Large phones (>=480px) */
@media (min-width: 480px) {
    .score-display {
        font-size: 1.6rem;
    }

    #scoreValue {
        font-size: 1.8rem;
    }
}

/* Tablets (>=768px) */
@media (min-width: 768px) {
    .score-display {
        font-size: 1.7rem;
    }

    .game-over-content h2 {
        font-size: 2rem;
    }

    .game-over-content p {
        font-size: 1.3rem;
    }
}

/* Desktop (>=1024px) */
@media (min-width: 1024px) {
    .score-display {
        font-size: 1.8rem;
    }

    #scoreValue {
        font-size: 2rem;
    }
}

/* Mobile-specific optimizations */
@media (max-width: 767px) {
    .preview {
        padding: 0.75rem !important;
    }

    h1 {
        font-size: 1.6rem;
    }

    .subtitle {
        font-size: 0.85rem;
    }

    .card {
        padding: 0.75rem !important;
    }

    .form-group label {
        font-size: 0.85rem;
    }

    .slider-value {
        font-size: 0.75rem;
    }

    .slider-labels span {
        font-size: 0.65rem;
    }

    .game-over-content {
        padding: 1.5rem 1.75rem;
    }

    .game-over-content h2 {
        font-size: 1.4rem;
    }

    .game-over-content p {
        font-size: 1rem;
    }
}