/* ========================================
   ¿Quien dijo? - Styles
   Mobile-first CSS
   ======================================== */

:root {
    /* Colors */
    --color-primary: #6366F1;
    --color-primary-hover: #4F46E5;
    --color-correct: #22C55E;
    --color-wrong: #EF4444;
    --color-bg: #0F172A;
    --color-card: #1E293B;
    --color-card-hover: #334155;
    --color-text: #F8FAFC;
    --color-text-muted: #94A3B8;
    --color-streak: #F59E0B;
    --color-border: #334155;

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

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

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

    /* Border radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 9999px;
}

/* ========================================
   Reset & Base
   ======================================== */

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

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-bg);
    color: var(--color-text);
    min-height: 100vh;
    min-height: 100dvh;
    line-height: 1.5;
    overflow-x: hidden;
}

/* ========================================
   Screen System
   ======================================== */

.screen {
    display: none;
    flex-direction: column;
    min-height: 100vh;
    min-height: 100dvh;
    padding: var(--spacing-md);
    padding-bottom: env(safe-area-inset-bottom, var(--spacing-md));
}

.screen.active {
    display: flex;
}

/* ========================================
   Home Screen
   ======================================== */

#screen-home {
    justify-content: center;
    align-items: center;
    text-align: center;
}

.home-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xl);
    width: 100%;
    max-width: 400px;
}

.logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-emoji {
    font-size: 64px;
    line-height: 1;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.logo h1 {
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-primary) 0%, #A78BFA 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    color: var(--color-text-muted);
    font-size: 1rem;
}

.stats-home {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--color-card);
    border-radius: var(--radius-md);
    width: 100%;
}

.stat-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-value {
    font-size: 1.25rem;
    font-weight: 700;
}

.footer {
    position: absolute;
    bottom: var(--spacing-md);
    left: 0;
    right: 0;
    text-align: center;
}

.footer a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

.footer a:hover {
    color: var(--color-text);
}

/* ========================================
   Buttons
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

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

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

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

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

.btn-secondary {
    background: var(--color-card);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--color-card-hover);
}

.btn-large {
    min-height: 56px;
    font-size: 1.125rem;
    width: 100%;
}

/* ========================================
   Playing Screen
   ======================================== */

#screen-playing {
    padding-top: var(--spacing-sm);
}

.game-header {
    display: flex;
    justify-content: center;
    padding-bottom: var(--spacing-md);
}

.streak-display {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-card);
    border-radius: var(--radius-full);
}

.streak-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.streak-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-streak);
}

.game-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

/* Quote Card */
.quote-card {
    position: relative;
    background: var(--color-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl) var(--spacing-lg);
    text-align: center;
}

.quote-mark {
    position: absolute;
    font-size: 4rem;
    color: var(--color-primary);
    opacity: 0.3;
    line-height: 1;
    font-family: Georgia, serif;
}

.quote-mark:first-of-type {
    top: var(--spacing-sm);
    left: var(--spacing-sm);
}

.quote-mark-end {
    bottom: var(--spacing-sm);
    right: var(--spacing-sm);
}

.quote-text {
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.6;
    position: relative;
    z-index: 1;
}

/* Options */
.options-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.option-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    width: 100%;
    min-height: 56px;
    padding: var(--spacing-md);
    background: var(--color-card);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 1rem;
    color: var(--color-text);
    cursor: pointer;
    transition: all var(--transition-fast);
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.option-btn:hover:not(:disabled) {
    background: var(--color-card-hover);
    border-color: var(--color-primary);
}

.option-btn:active:not(:disabled) {
    transform: scale(0.98);
}

.option-btn:disabled {
    cursor: not-allowed;
}

.option-btn.correct {
    background: var(--color-correct);
    border-color: var(--color-correct);
    color: white;
}

.option-btn.wrong {
    background: var(--color-wrong);
    border-color: var(--color-wrong);
    color: white;
}

.option-btn.selected {
    border-color: var(--color-primary);
    background: var(--color-card-hover);
}

.option-emoji {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.option-name {
    font-weight: 600;
    text-align: left;
}

/* ========================================
   Feedback Overlay
   ======================================== */

.feedback-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(15, 23, 42, 0.8);
    z-index: 100;
    opacity: 1;
    transition: opacity var(--transition-fast);
}

.feedback-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.feedback-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    animation: popIn 0.3s ease;
}

@keyframes popIn {
    0% { transform: scale(0.5); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

.feedback-emoji {
    font-size: 5rem;
    line-height: 1;
}

.feedback-text {
    font-size: 1.5rem;
    font-weight: 700;
    text-transform: uppercase;
}

.feedback-overlay.correct .feedback-text {
    color: var(--color-correct);
}

.feedback-overlay.wrong .feedback-text {
    color: var(--color-wrong);
}

/* ========================================
   Game Over Screen
   ======================================== */

#screen-gameover {
    justify-content: center;
    align-items: center;
}

.gameover-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xl);
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.gameover-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-wrong);
}

.gameover-stats {
    display: flex;
    gap: var(--spacing-lg);
    width: 100%;
}

.streak-final,
.best-streak-final {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background: var(--color-card);
    border-radius: var(--radius-md);
}

.streak-final-label,
.best-streak-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.streak-final-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-streak);
}

.best-streak-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
}

.correct-answer {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--color-card);
    border-radius: var(--radius-md);
    width: 100%;
}

.correct-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.correct-author {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: 700;
}

.correct-author-emoji {
    font-size: 1.5rem;
}

.gameover-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    width: 100%;
}

/* ========================================
   Animations
   ======================================== */

.shake {
    animation: shake 0.5s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.pulse {
    animation: pulse 0.3s ease;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

/* ========================================
   Media Queries
   ======================================== */

@media (min-width: 768px) {
    .screen {
        padding: var(--spacing-xl);
    }

    .logo-emoji {
        font-size: 80px;
    }

    .logo h1 {
        font-size: 2.5rem;
    }

    .quote-text {
        font-size: 1.5rem;
    }

    .options-container {
        gap: var(--spacing-md);
    }

    .option-btn {
        min-height: 64px;
        font-size: 1.125rem;
    }
}

/* ========================================
   Utility Classes
   ======================================== */

.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}