/* ==================== */
/* CSS VARIABLES & RESET */
/* ==================== */

:root {
    /* Colors */
    --color-bg-primary: #0a0a0a;
    --color-bg-secondary: #1a1a1a;
    --color-accent: #f4e04d;
    --color-accent-hover: #fff566;
    --color-text-primary: #ffffff;
    --color-text-secondary: #a0a0a0;
    --color-card-bg: #f4e04d;
    --color-card-back: #2a2a2a;
    --color-shadow: rgba(244, 224, 77, 0.3);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 24px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px var(--color-shadow);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 100%);
    color: var(--color-text-primary);
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    margin: 0;
    overflow: hidden;
}

/* ==================== */
/* SCREEN MANAGEMENT */
/* ==================== */

.lobby-screen,
.waiting-room,
.game-screen {
    display: none;
    width: 100%;
    height: 100vh;
    align-items: center;
    justify-content: center;
}

/* ==================== */
/* LOBBY SCREEN */
/* ==================== */

.lobby-container {
    max-width: 400px;
    width: 100%;
    padding: min(5vw, 2rem);
    text-align: center;
}

.lobby-title {
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: 800;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.05em;
}

.lobby-subtitle {
    font-size: clamp(1rem, 3vw, 1.2rem);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
}

.lobby-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.lobby-btn {
    width: 100%;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: clamp(1rem, 3vw, 1.1rem);
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    transition: all var(--transition-fast);
    border: none;
}

.lobby-btn.primary {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
    color: var(--color-bg-primary);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.lobby-btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 30px var(--color-shadow);
}

.lobby-btn.secondary {
    background: transparent;
    color: var(--color-accent);
    border: 2px solid var(--color-accent);
}

.lobby-btn.secondary:hover {
    background: var(--color-accent);
    color: var(--color-bg-primary);
    transform: translateY(-2px);
}

.divider {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: rgba(255, 255, 255, 0.1);
}

.join-room {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.room-input {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--color-bg-secondary);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: clamp(1rem, 3vw, 1.1rem);
    font-weight: 600;
    text-align: center;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    transition: all var(--transition-fast);
}

.room-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(244, 224, 77, 0.1);
}

.room-input::placeholder {
    color: var(--color-text-secondary);
    text-transform: none;
    letter-spacing: normal;
}

/* ==================== */
/* WAITING ROOM */
/* ==================== */

.waiting-container {
    max-width: 400px;
    width: 100%;
    padding: min(5vw, 2rem);
}

.waiting-title {
    font-size: clamp(1.2rem, 4vw, 1.5rem);
    font-weight: 700;
    color: var(--color-text-secondary);
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.room-code-display {
    background: var(--color-bg-secondary);
    border: 2px solid var(--color-accent);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.code-text {
    font-size: clamp(2rem, 6vw, 2.5rem);
    font-weight: 800;
    color: var(--color-accent);
    letter-spacing: 0.3em;
    flex: 1;
    text-align: center;
}

.copy-btn {
    background: var(--color-accent);
    color: var(--color-bg-primary);
    border: none;
    border-radius: var(--radius-sm);
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.copy-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(244, 224, 77, 0.3);
}

.players-list {
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.players-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.player-item {
    padding: var(--spacing-sm);
    background: var(--color-bg-primary);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-xs);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.player-name {
    font-weight: 600;
    color: var(--color-text-primary);
}

.player-badge {
    background: var(--color-accent);
    color: var(--color-bg-primary);
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 700;
}

.waiting-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

/* ==================== */
/* GAME CONTAINER */
/* ==================== */

.game-container {
    width: 100%;
    max-width: 500px;
    height: 100vh;
    background: var(--color-bg-secondary);
    border-radius: 0;
    padding: min(3vw, 1.5rem);
    box-shadow: var(--shadow-lg);
    position: relative;
    animation: fadeIn 0.5s ease;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== */
/* HEADER */
/* ==================== */

.game-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: min(2vh, 1rem);
    flex-shrink: 0;
}

.header-left {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.game-title {
    font-size: clamp(1.1rem, 3vw, 1.5rem);
    font-weight: 700;
    letter-spacing: 0.1em;
    line-height: 1.2;
    color: var(--color-text-secondary);
    text-transform: uppercase;
}

.room-code-small {
    font-size: 0.75rem;
    color: var(--color-accent);
    font-weight: 600;
    letter-spacing: 0.1em;
}

.controls {
    display: flex;
    gap: var(--spacing-xs);
}

.control-btn {
    width: clamp(36px, 10vw, 44px);
    height: clamp(36px, 10vw, 44px);
    background: var(--color-bg-primary);
    border: 2px solid var(--color-bg-secondary);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.control-btn svg {
    width: 60%;
    height: 60%;
}

.control-btn:hover {
    background: var(--color-bg-secondary);
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

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

.control-btn.active {
    background: var(--color-accent);
    color: var(--color-bg-primary);
    border-color: var(--color-accent);
}

/* ==================== */
/* MULTIPLAYER FEATURES */
/* ==================== */

.players-score {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: min(2vh, 1rem);
    flex-wrap: wrap;
}

.player-score {
    background: var(--color-bg-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    flex: 1;
    min-width: 120px;
}

.player-score.current-player {
    border: 2px solid var(--color-accent);
}

.score-name {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    flex: 1;
}

.score-value {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--color-accent);
}

.turn-indicator {
    text-align: center;
    padding: var(--spacing-sm);
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.turn-indicator.active {
    background: var(--color-bg-primary);
    color: var(--color-accent);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.02);
    }
}

/* ==================== */
/* TIMER DISPLAY */
/* ==================== */

.timer-display {
    margin-bottom: min(2vh, 1rem);
    padding: 0;
    background: transparent;
    border-radius: 0;
    flex-shrink: 0;
}

.current-time {
    font-size: clamp(2rem, 6vw, 2.5rem);
    font-weight: 800;
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
}

.milliseconds {
    font-size: clamp(1.2rem, 3.5vw, 1.5rem);
    font-weight: 600;
    color: var(--color-text-secondary);
}

/* ==================== */
/* GAME CARD WRAPPER */
/* ==================== */

.game-card {
    background: var(--color-card-bg);
    border-radius: var(--radius-lg);
    padding: min(4vw, 1.5rem);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* ==================== */
/* GAME BOARD */
/* ==================== */

.game-board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: min(2vw, 1rem);
    margin-bottom: min(3vh, 1.5rem);
    perspective: 1000px;
    flex: 1;
    align-content: center;
}

/* ==================== */
/* CARDS */
/* ==================== */

.card {
    aspect-ratio: 1;
    position: relative;
    cursor: pointer;
    transform-style: preserve-3d;
    transition: transform var(--transition-normal);
}

.card:hover:not(.flipped):not(.matched) {
    transform: scale(1.05);
}

.card:active:not(.flipped):not(.matched) {
    transform: scale(0.98);
}

.card.flipped {
    transform: rotateY(180deg);
}

.card.matched {
    animation: matchPulse 0.5s ease;
    pointer-events: none;
}

@keyframes matchPulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.1);
    }
}

.card-face {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: clamp(2.5rem, 8vw, 3.5rem);
    transition: all var(--transition-normal);
}

.card-front {
    background: #ffffff;
    transform: rotateY(180deg);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.card-back {
    background: #2a2a2a;
    border: 2px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.card-back::before {
    content: '?';
    font-size: 2.5rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.2);
}

/* ==================== */
/* RESET BUTTON */
/* ==================== */

.reset-btn {
    width: 100%;
    padding: min(2vh, 1rem);
    background: transparent;
    color: var(--color-bg-primary);
    border: 3px solid var(--color-bg-primary);
    border-radius: var(--radius-md);
    font-size: clamp(0.95rem, 2.5vw, 1.1rem);
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.reset-btn svg {
    width: clamp(16px, 4vw, 20px);
    height: clamp(16px, 4vw, 20px);
}

.reset-btn:hover {
    background: var(--color-bg-primary);
    color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

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

/* ==================== */
/* VICTORY MODAL */
/* ==================== */

.victory-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
    z-index: 1000;
    padding: min(3vw, 1.5rem);
}

.victory-modal.show {
    opacity: 1;
    pointer-events: all;
}

.victory-card {
    background: var(--color-card-bg);
    padding: clamp(2rem, 8vw, 3rem);
    border-radius: var(--radius-lg);
    text-align: left;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    animation: cardSlideUp 0.5s ease;
    position: relative;
}

@keyframes cardSlideUp {
    from {
        transform: translateY(100px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.fire-emoji {
    font-size: clamp(2.5rem, 8vw, 3.5rem);
    margin-bottom: clamp(1rem, 3vw, 1.5rem);
}

.victory-message {
    font-size: clamp(2rem, 7vw, 3rem);
    font-weight: 800;
    color: var(--color-bg-primary);
    margin-bottom: clamp(1.5rem, 4vw, 2rem);
    line-height: 1.1;
}

.final-scores {
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.final-score-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-sm);
}

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

.final-score-item .rank {
    font-weight: 800;
    color: var(--color-bg-primary);
    font-size: 1.2rem;
    min-width: 2rem;
}

.final-score-item .name {
    flex: 1;
    font-weight: 600;
    color: var(--color-bg-primary);
}

.final-score-item .score {
    font-weight: 700;
    color: var(--color-bg-primary);
}

.new-game-btn {
    width: 100%;
    padding: clamp(0.9rem, 3vw, 1.2rem);
    background: transparent;
    color: var(--color-bg-primary);
    border: 3px solid var(--color-bg-primary);
    border-radius: var(--radius-md);
    font-size: clamp(1rem, 3vw, 1.2rem);
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.new-game-btn:hover {
    background: var(--color-bg-primary);
    color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

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

/* ==================== */
/* RESPONSIVE DESIGN */
/* ==================== */

@media (max-width: 480px) {
    .game-container {
        border-radius: 0;
    }
}

@media (min-width: 768px) {
    .game-container {
        max-width: 600px;
        border-radius: var(--radius-xl);
        height: auto;
        max-height: 95vh;
    }
}