/* ============================================
   CSS VARIABLES
   ============================================ */
:root {
    /* Game colors */
    --color-rojo: #E74C3C;
    --color-azul: #3498DB;
    --color-verde: #2ECC71;
    --color-amarillo: #F1C40F;
    --color-naranja: #E67E22;
    --color-morado: #9B59B6;

    /* UI colors */
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-card: #0f3460;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent: #e94560;
    --accent-hover: #ff6b6b;
    --success: #2ecc71;
    --error: #e74c3c;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-sm: 14px;
    --font-size-md: 16px;
    --font-size-lg: 20px;
    --font-size-xl: 28px;
    --font-size-xxl: 48px;
    --font-size-huge: 72px;

    /* Borders */
    --border-radius: 12px;
    --border-radius-lg: 20px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
}

/* ============================================
   RESET & BASE
   ============================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    min-height: 100dvh;
    overflow-x: hidden;
}

/* ============================================
   APP CONTAINER
   ============================================ */
.app {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
}

/* ============================================
   SCREENS
   ============================================ */
.screen {
    display: none;
    flex: 1;
    padding: var(--spacing-md);
}

.screen.active {
    display: flex;
    animation: fadeIn var(--transition-normal);
}

.screen-content {
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
    padding-top: var(--spacing-xl);
}

.screen-content.centered {
    justify-content: center;
    padding-top: 0;
    min-height: calc(100vh - var(--spacing-md) * 2);
    min-height: calc(100dvh - var(--spacing-md) * 2);
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
.title {
    font-size: var(--font-size-xxl);
    font-weight: 700;
    text-align: center;
    background: linear-gradient(135deg, var(--color-rojo), var(--color-azul), var(--color-verde), var(--color-amarillo));
    background-size: 300% 300%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 3s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.subtitle {
    font-size: var(--font-size-md);
    color: var(--text-secondary);
    text-align: center;
}

h2 {
    font-size: var(--font-size-xl);
    text-align: center;
}

h3 {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
}

/* ============================================
   HOME SCREEN
   ============================================ */
.instructions {
    text-align: center;
    color: var(--text-secondary);
    line-height: 1.6;
}

.instructions strong {
    color: var(--text-primary);
}

.demo-box {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    width: 100%;
}

.demo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.demo-arrow {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
}

.demo-answer {
    font-size: var(--font-size-lg);
}

.highscore-display {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.highscore-display #highscore-value {
    color: var(--color-amarillo);
    font-weight: 700;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius);
    font-size: var(--font-size-md);
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--transition-fast), background var(--transition-fast);
    touch-action: manipulation;
    min-height: 48px;
    width: 100%;
}

.btn:active {
    transform: scale(0.98);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-primary {
    background: var(--accent);
    color: var(--text-primary);
}

.btn-primary:active:not(:disabled) {
    background: var(--accent-hover);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 2px solid var(--accent);
}

.btn-secondary:active:not(:disabled) {
    background: var(--bg-secondary);
}

.btn-text {
    background: transparent;
    color: var(--text-secondary);
}

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

.btn-large {
    padding: var(--spacing-lg) var(--spacing-xl);
    font-size: var(--font-size-lg);
    min-height: 64px;
}

.btn-icon {
    width: 48px;
    min-width: 48px;
    padding: var(--spacing-sm);
    font-size: var(--font-size-xl);
    background: var(--accent);
    color: var(--text-primary);
}

.btn-stack {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    width: 100%;
}

/* ============================================
   SETUP SCREEN
   ============================================ */
.players-setup {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.players-list {
    list-style: none;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    overflow: hidden;
    min-height: 60px;
}

.players-list:empty::after {
    content: 'Agrega jugadores para comenzar';
    display: block;
    padding: var(--spacing-lg);
    text-align: center;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.players-list li {
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    border-bottom: 1px solid var(--bg-secondary);
}

.players-list li:last-child {
    border-bottom: none;
}

.players-list .player-number {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: 50%;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.players-list .player-name {
    flex: 1;
}

.players-list .btn-remove {
    width: 32px;
    height: 32px;
    min-width: 32px;
    padding: 0;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
    cursor: pointer;
    border-radius: var(--border-radius);
    transition: color var(--transition-fast), background var(--transition-fast);
}

.players-list .btn-remove:active {
    background: var(--error);
    color: var(--text-primary);
}

.add-player-row {
    display: flex;
    gap: var(--spacing-sm);
}

.add-player-row input {
    flex: 1;
    padding: var(--spacing-md);
    border: 2px solid var(--bg-card);
    border-radius: var(--border-radius);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: var(--font-size-md);
    min-height: 48px;
}

.add-player-row input:focus {
    outline: none;
    border-color: var(--accent);
}

.add-player-row input::placeholder {
    color: var(--text-secondary);
}

.players-hint {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    text-align: center;
}

.players-hint.error {
    color: var(--error);
}

/* ============================================
   READY SCREEN
   ============================================ */
.turn-announcement {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.turn-label {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
}

.player-name-big {
    font-size: var(--font-size-xxl);
    font-weight: 700;
    color: var(--accent);
}

.ready-instructions {
    text-align: center;
    color: var(--text-secondary);
    max-width: 280px;
}

.ready-instructions strong {
    color: var(--text-primary);
}

.turn-progress {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* ============================================
   PLAYING SCREEN
   ============================================ */
.playing-content {
    padding-top: var(--spacing-md);
    gap: var(--spacing-md);
    justify-content: space-between;
    height: calc(100vh - var(--spacing-md) * 2);
    height: calc(100dvh - var(--spacing-md) * 2);
}

.game-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.timer {
    font-size: var(--font-size-xxl);
    font-weight: 700;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
}

.timer.warning {
    color: var(--color-naranja);
    animation: pulse 0.5s ease infinite;
}

.timer.danger {
    color: var(--error);
    animation: pulse 0.3s ease infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.timer-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.target-display {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    width: 100%;
    min-height: 120px;
}

.target-text {
    font-size: var(--font-size-xxl);
    font-weight: 700;
    text-transform: uppercase;
    transition: color var(--transition-fast);
}

/* ============================================
   COLOR GRID
   ============================================ */
.color-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    width: 100%;
    flex: 1;
    max-height: 320px;
}

.color-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: var(--border-radius-lg);
    cursor: pointer;
    transition: transform var(--transition-fast), opacity var(--transition-fast), box-shadow var(--transition-fast);
    touch-action: manipulation;
    min-height: 80px;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.color-btn:active:not(:disabled) {
    transform: scale(0.95);
}

.color-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.color-btn.feedback-correct {
    animation: correctPulse 0.4s ease;
    box-shadow: 0 0 20px var(--success);
}

.color-btn.feedback-incorrect {
    animation: shake 0.4s ease;
    box-shadow: 0 0 20px var(--error);
}

@keyframes correctPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.08); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-6px); }
    75% { transform: translateX(6px); }
}

/* Color button specific colors */
.color-btn[data-color="rojo"] { background: var(--color-rojo); }
.color-btn[data-color="azul"] { background: var(--color-azul); }
.color-btn[data-color="verde"] { background: var(--color-verde); }
.color-btn[data-color="amarillo"] { background: var(--color-amarillo); color: rgba(0, 0, 0, 0.8); text-shadow: none; }
.color-btn[data-color="naranja"] { background: var(--color-naranja); }
.color-btn[data-color="morado"] { background: var(--color-morado); }

/* ============================================
   SCORE BAR
   ============================================ */
.score-bar {
    display: flex;
    justify-content: center;
    width: 100%;
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--border-radius);
}

.current-score {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.score-name {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.score-value {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--accent);
    font-variant-numeric: tabular-nums;
}

.score-value.positive {
    color: var(--success);
}

.score-value.negative {
    color: var(--error);
}

/* ============================================
   RESULT SCREEN
   ============================================ */
.turn-result {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xl);
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    width: 100%;
}

.result-label {
    font-size: var(--font-size-md);
    color: var(--text-secondary);
}

.player-name-result {
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.score-big {
    font-size: var(--font-size-huge);
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
}

.score-label-big {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
}

.result-best {
    padding: var(--spacing-md);
    background: linear-gradient(135deg, var(--color-amarillo), var(--color-naranja));
    border-radius: var(--border-radius);
    font-weight: 600;
    color: var(--bg-primary);
}

.result-best.hidden {
    display: none;
}

.next-turn-text {
    color: var(--text-secondary);
    font-size: var(--font-size-md);
}

/* ============================================
   FINISHED SCREEN
   ============================================ */
.winner-display {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, var(--bg-card), var(--bg-secondary));
    border-radius: var(--border-radius-lg);
    border: 2px solid var(--color-amarillo);
    width: 100%;
}

.winner-emoji {
    font-size: 64px;
}

.winner-label {
    font-size: var(--font-size-md);
    color: var(--text-secondary);
}

.winner-name {
    font-size: var(--font-size-xxl);
    font-weight: 700;
    color: var(--color-amarillo);
}

.winner-score {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
}

.final-ranking {
    width: 100%;
}

.ranking-list {
    list-style: none;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    overflow: hidden;
    margin-top: var(--spacing-sm);
    counter-reset: ranking;
}

.ranking-list li {
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    border-bottom: 1px solid var(--bg-secondary);
    counter-increment: ranking;
}

.ranking-list li:last-child {
    border-bottom: none;
}

.ranking-list li::before {
    content: counter(ranking) ".";
    width: 24px;
    font-weight: 700;
    color: var(--text-secondary);
}

.ranking-list li:first-child::before {
    content: "🥇";
}

.ranking-list li:nth-child(2)::before {
    content: "🥈";
}

.ranking-list li:nth-child(3)::before {
    content: "🥉";
}

.ranking-list li:first-child {
    background: rgba(241, 196, 15, 0.1);
}

.ranking-list .rank-name {
    flex: 1;
}

.ranking-list .rank-score {
    font-weight: 700;
    font-size: var(--font-size-lg);
}

.ranking-list li:first-child .rank-score {
    color: var(--color-amarillo);
}

/* ============================================
   UTILITIES
   ============================================ */
.hidden {
    display: none !important;
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Score change animation */
.score-value.changed {
    animation: scoreChange 0.3s ease;
}

@keyframes scoreChange {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (min-width: 768px) {
    .color-grid {
        grid-template-columns: repeat(3, 1fr);
        max-height: 400px;
    }
}

/* Landscape on mobile */
@media (max-height: 600px) and (orientation: landscape) {
    .playing-content {
        flex-direction: row;
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }

    .game-header {
        width: 100%;
        flex-direction: row;
        justify-content: center;
        gap: var(--spacing-sm);
    }

    .target-display {
        width: calc(40% - var(--spacing-sm));
        min-height: 80px;
    }

    .color-grid {
        width: calc(60% - var(--spacing-sm));
        max-height: none;
    }

    .score-bar {
        width: 100%;
    }
}