/* ===== CSS Variables ===== */
:root {
    --bg-dark: #0a0a1a;
    --bg-medium: #12122a;
    --accent-blue: #4a9eff;
    --accent-purple: #8b5cf6;
    --accent-pink: #ec4899;
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --snow-white: #e8f0ff;
    --ice-blue: #7dd3fc;
}

/* ===== Reset & Base ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html,
body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: 'VT323', monospace;
    background: var(--bg-dark);
    color: var(--text-primary);
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

/* ===== 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;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

.screen.active {
    display: flex;
}

/* ===== Menu Screen ===== */
#menu-screen {
    background: linear-gradient(180deg, #0a0a1a 0%, #1a1a3a 50%, #2a2a4a 100%);
}

.stars {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        radial-gradient(2px 2px at 20px 30px, white, transparent),
        radial-gradient(2px 2px at 40px 70px, rgba(255, 255, 255, 0.8), transparent),
        radial-gradient(1px 1px at 90px 40px, white, transparent),
        radial-gradient(2px 2px at 130px 80px, rgba(255, 255, 255, 0.6), transparent),
        radial-gradient(1px 1px at 160px 120px, white, transparent);
    background-size: 200px 200px;
    animation: twinkle 4s ease-in-out infinite;
}

@keyframes twinkle {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

.menu-content {
    z-index: 10;
    text-align: center;
    padding: 20px;
}

.title-container {
    margin-bottom: 20px;
}

.game-title {
    font-family: 'Press Start 2P', cursive;
    font-size: clamp(1.5rem, 6vw, 3rem);
    background: linear-gradient(135deg, var(--ice-blue) 0%, var(--accent-purple) 50%, var(--accent-pink) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px rgba(74, 158, 255, 0.5);
    line-height: 1.4;
    letter-spacing: 2px;
}

.penguin-preview {
    font-size: clamp(4rem, 15vw, 8rem);
    margin: 20px 0;
    animation: waddle 1s ease-in-out infinite;
    filter: drop-shadow(0 0 20px rgba(74, 158, 255, 0.5));
}

@keyframes waddle {

    0%,
    100% {
        transform: rotate(-5deg);
    }

    50% {
        transform: rotate(5deg);
    }
}

.tagline {
    font-size: clamp(1rem, 3vw, 1.5rem);
    color: var(--text-secondary);
    margin-bottom: 30px;
    font-style: italic;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

/* ===== Buttons ===== */
.game-btn {
    font-family: 'Press Start 2P', cursive;
    font-size: clamp(0.8rem, 2.5vw, 1rem);
    padding: 15px 40px;
    border: none;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(74, 158, 255, 0.4);
    margin: 10px;
    min-width: 200px;
    min-height: 50px;
}

.game-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(74, 158, 255, 0.6);
}

.game-btn:active {
    transform: translateY(0);
}

.game-btn.secondary {
    background: transparent;
    border: 2px solid var(--accent-blue);
    box-shadow: none;
}

.game-btn.pulse {
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        box-shadow: 0 4px 15px rgba(74, 158, 255, 0.4);
    }

    50% {
        box-shadow: 0 4px 30px rgba(74, 158, 255, 0.8);
    }
}

.instructions {
    margin-top: 30px;
    color: var(--text-secondary);
    font-size: clamp(0.9rem, 2.5vw, 1.2rem);
}

.instructions p {
    margin: 8px 0;
}

/* ===== Snow Overlay ===== */
.snow-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    background-image:
        radial-gradient(3px 3px at 100px 50px, white, transparent),
        radial-gradient(2px 2px at 200px 150px, white, transparent),
        radial-gradient(2px 2px at 300px 250px, rgba(255, 255, 255, 0.8), transparent),
        radial-gradient(3px 3px at 400px 100px, white, transparent);
    background-size: 500px 500px;
    animation: snowfall 10s linear infinite;
    opacity: 0.3;
}

@keyframes snowfall {
    0% {
        background-position: 0 0;
    }

    100% {
        background-position: 100px 500px;
    }
}

/* ===== Game Screen ===== */
#game-screen {
    background: var(--bg-dark);
}

#game-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

#game-ui {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    padding: 15px;
    z-index: 100;
    pointer-events: none;
}

.ui-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.score-display,
.high-score-display {
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
    padding: 10px 15px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.label {
    display: block;
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-bottom: 2px;
}

.value {
    font-family: 'Press Start 2P', cursive;
    font-size: clamp(0.9rem, 3vw, 1.2rem);
    color: var(--ice-blue);
}

.quote {
    position: absolute;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    font-size: clamp(0.9rem, 2.5vw, 1.3rem);
    color: var(--text-secondary);
    font-style: italic;
    max-width: 90%;
    opacity: 0;
    transition: opacity 0.5s ease;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.8);
}

.quote.visible {
    opacity: 1;
}

/* ===== Game Over Screen ===== */
#gameover-screen {
    background: rgba(10, 10, 26, 0.95);
    backdrop-filter: blur(10px);
}

.gameover-content {
    text-align: center;
    padding: 20px;
}

.gameover-title {
    font-family: 'Press Start 2P', cursive;
    font-size: clamp(1.2rem, 5vw, 2rem);
    color: var(--accent-pink);
    margin-bottom: 30px;
    text-shadow: 0 0 20px rgba(236, 72, 153, 0.5);
}

.final-stats {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 30px;
}

.stat {
    background: rgba(255, 255, 255, 0.05);
    padding: 20px 30px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.stat-value {
    font-family: 'Press Start 2P', cursive;
    font-size: clamp(1.2rem, 4vw, 1.8rem);
    color: var(--ice-blue);
}

.final-quote {
    font-size: clamp(1rem, 2.5vw, 1.3rem);
    color: var(--text-secondary);
    font-style: italic;
    max-width: 400px;
    margin: 0 auto 30px;
    line-height: 1.6;
}

/* ===== Responsive ===== */
@media (max-width: 480px) {
    .game-btn {
        min-width: 180px;
        padding: 12px 30px;
    }

    .final-stats {
        flex-direction: column;
        gap: 15px;
    }

    .stat {
        padding: 15px 25px;
    }
}

@media (min-height: 800px) {
    .menu-content {
        padding: 40px;
    }

    .penguin-preview {
        margin: 30px 0;
    }
}

/* ===== Landscape Mobile ===== */
@media (max-height: 500px) and (orientation: landscape) {
    .penguin-preview {
        font-size: 3rem;
        margin: 10px 0;
    }

    .tagline {
        margin-bottom: 15px;
    }

    .instructions {
        margin-top: 15px;
    }

    .game-btn {
        padding: 10px 30px;
        min-height: 40px;
    }
}

/* ===== Name Screen ===== */
#name-screen {
    background: linear-gradient(180deg, #0a0a1a 0%, #1a1a3a 50%, #2a2a4a 100%);
}

.name-input-container {
    margin: 20px 0 30px;
}

.input-label {
    display: block;
    font-size: clamp(1rem, 2.5vw, 1.3rem);
    color: var(--text-secondary);
    margin-bottom: 15px;
    font-style: italic;
}

.name-input {
    font-family: 'Press Start 2P', cursive;
    font-size: clamp(0.8rem, 2.5vw, 1rem);
    padding: 15px 25px;
    border: 2px solid var(--accent-blue);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    text-align: center;
    width: 100%;
    max-width: 280px;
    outline: none;
    transition: all 0.3s ease;
}

.name-input:focus {
    border-color: var(--accent-purple);
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.4);
    background: rgba(255, 255, 255, 0.1);
}

.name-input::placeholder {
    color: var(--text-secondary);
    opacity: 0.5;
}

/* ===== Welcome Text ===== */
.welcome-text {
    font-size: clamp(1.1rem, 3vw, 1.5rem);
    color: var(--text-secondary);
    margin-bottom: 25px;
}

.welcome-text span {
    color: var(--ice-blue);
    font-weight: bold;
}

/* ===== Player Display in Game ===== */
.player-display-game {
    background: rgba(139, 92, 246, 0.3);
    backdrop-filter: blur(10px);
    padding: 8px 15px;
    border-radius: 20px;
    border: 1px solid rgba(139, 92, 246, 0.5);
}

.player-name-text {
    font-family: 'Press Start 2P', cursive;
    font-size: clamp(0.6rem, 2vw, 0.8rem);
    color: var(--accent-purple);
}

/* ===== Leaderboard Screen ===== */
#leaderboard-screen {
    background: linear-gradient(180deg, #0a0a1a 0%, #1a1a3a 50%, #2a2a4a 100%);
}

.leaderboard-content {
    z-index: 10;
    text-align: center;
    padding: 20px;
    width: 100%;
    max-width: 500px;
}

.leaderboard-title {
    font-family: 'Press Start 2P', cursive;
    font-size: clamp(1rem, 4vw, 1.5rem);
    color: var(--accent-blue);
    margin-bottom: 30px;
    text-shadow: 0 0 20px rgba(74, 158, 255, 0.5);
}

.leaderboard-list {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 15px;
    margin-bottom: 25px;
    max-height: 400px;
    overflow-y: auto;
}

.leaderboard-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 15px;
    border-radius: 8px;
    margin-bottom: 8px;
    transition: all 0.3s ease;
}

.leaderboard-item:last-child {
    margin-bottom: 0;
}

.leaderboard-item.gold {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.2) 0%, rgba(255, 180, 0, 0.1) 100%);
    border: 1px solid rgba(255, 215, 0, 0.3);
}

.leaderboard-item.silver {
    background: linear-gradient(135deg, rgba(192, 192, 192, 0.2) 0%, rgba(150, 150, 150, 0.1) 100%);
    border: 1px solid rgba(192, 192, 192, 0.3);
}

.leaderboard-item.bronze {
    background: linear-gradient(135deg, rgba(205, 127, 50, 0.2) 0%, rgba(180, 100, 30, 0.1) 100%);
    border: 1px solid rgba(205, 127, 50, 0.3);
}

.leaderboard-item.normal {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.leaderboard-rank {
    font-family: 'Press Start 2P', cursive;
    font-size: clamp(0.7rem, 2vw, 0.9rem);
    min-width: 40px;
}

.leaderboard-rank.gold {
    color: #ffd700;
}

.leaderboard-rank.silver {
    color: #c0c0c0;
}

.leaderboard-rank.bronze {
    color: #cd7f32;
}

.leaderboard-rank.normal {
    color: var(--text-secondary);
}

.leaderboard-name {
    flex: 1;
    font-size: clamp(0.9rem, 2.5vw, 1.1rem);
    color: var(--text-primary);
    text-align: left;
    padding: 0 15px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.leaderboard-score {
    font-family: 'Press Start 2P', cursive;
    font-size: clamp(0.7rem, 2vw, 0.9rem);
    color: var(--ice-blue);
}

.leaderboard-empty {
    color: var(--text-secondary);
    font-style: italic;
    padding: 30px;
}

/* Scrollbar for leaderboard */
.leaderboard-list::-webkit-scrollbar {
    width: 6px;
}

.leaderboard-list::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 3px;
}

.leaderboard-list::-webkit-scrollbar-thumb {
    background: var(--accent-blue);
    border-radius: 3px;
}

@media (max-width: 480px) {
    .leaderboard-content {
        padding: 15px;
    }

    .leaderboard-list {
        max-height: 300px;
    }
}

/* ===== Settings Button ===== */
.settings-btn {
    position: absolute;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 2px solid var(--accent-blue);
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
}

.settings-btn:hover {
    background: rgba(74, 158, 255, 0.2);
    transform: rotate(90deg) scale(1.1);
    box-shadow: 0 0 20px rgba(74, 158, 255, 0.5);
}

/* ===== Settings Modal ===== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: linear-gradient(135deg, rgba(26, 26, 58, 0.95) 0%, rgba(10, 10, 26, 0.98) 100%);
    border-radius: 16px;
    border: 1px solid rgba(74, 158, 255, 0.3);
    width: 90%;
    max-width: 400px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 40px rgba(74, 158, 255, 0.2);
    overflow: hidden;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.modal-header h2 {
    font-family: 'Press Start 2P', cursive;
    font-size: clamp(0.8rem, 3vw, 1rem);
    color: var(--accent-blue);
    margin: 0;
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: rgba(236, 72, 153, 0.2);
    color: var(--accent-pink);
}

.modal-body {
    padding: 20px;
}

.setting-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.setting-row:last-child {
    border-bottom: none;
}

.setting-row.music-controls {
    justify-content: center;
    gap: 15px;
}

.setting-label {
    font-size: clamp(0.9rem, 2.5vw, 1.1rem);
    color: var(--text-primary);
}

/* Language Toggle */
.language-toggle {
    display: flex;
    gap: 5px;
    background: rgba(0, 0, 0, 0.3);
    padding: 4px;
    border-radius: 8px;
}

.lang-btn {
    font-family: 'Press Start 2P', cursive;
    font-size: 0.6rem;
    padding: 8px 15px;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.lang-btn:hover {
    color: var(--text-primary);
}

.lang-btn.active {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
    color: white;
    box-shadow: 0 2px 10px rgba(74, 158, 255, 0.4);
}

/* Music Select */
.music-select {
    font-family: 'VT323', monospace;
    font-size: clamp(0.9rem, 2.5vw, 1rem);
    padding: 8px 12px;
    border: 1px solid var(--accent-blue);
    border-radius: 8px;
    background: rgba(0, 0, 0, 0.3);
    color: var(--text-primary);
    cursor: pointer;
    max-width: 180px;
    outline: none;
}

.music-select:focus {
    box-shadow: 0 0 10px rgba(74, 158, 255, 0.4);
}

.music-select option {
    background: #1a1a3a;
    color: var(--text-primary);
}

/* Music Buttons */
.music-btn {
    font-family: 'Press Start 2P', cursive;
    font-size: 0.6rem;
    padding: 10px 20px;
    border: 2px solid var(--accent-blue);
    border-radius: 8px;
    background: transparent;
    color: var(--accent-blue);
    cursor: pointer;
    transition: all 0.3s ease;
}

.music-btn:hover {
    background: rgba(74, 158, 255, 0.2);
    box-shadow: 0 0 15px rgba(74, 158, 255, 0.3);
}

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

#music-play {
    border-color: #22c55e;
    color: #22c55e;
}

#music-play:hover {
    background: rgba(34, 197, 94, 0.2);
    box-shadow: 0 0 15px rgba(34, 197, 94, 0.3);
}

#music-stop {
    border-color: var(--accent-pink);
    color: var(--accent-pink);
}

#music-stop:hover {
    background: rgba(236, 72, 153, 0.2);
    box-shadow: 0 0 15px rgba(236, 72, 153, 0.3);
}

/* Settings Responsive */
@media (max-width: 380px) {
    .modal-content {
        width: 95%;
    }
    
    .setting-row {
        flex-direction: column;
        gap: 10px;
        align-items: flex-start;
    }
    
    .setting-row.music-controls {
        flex-direction: row;
        align-items: center;
    }
    
    .music-select {
        max-width: 100%;
        width: 100%;
    }
}