:root {
    /* Paleta de colores */
    --color-bg: #050d18;
    --color-surface: #0f1e2e;
    --color-surface-elevated: #1a2a3e;
    --color-text-primary: #e5e7eb;
    --color-text-secondary: #94a3b8;
    --color-accent: #facc15;
    --color-success: #4ade80;
    --color-border: #1e3a52;
    
    /* Variables de diseño */
    --radius-card: 14px;
    --radius-button: 8px;
    --font-main: 'Inter', system-ui, -apple-system, sans-serif;
    
    /* Spacings */
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
}

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

body {
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    font-family: var(--font-main);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    flex: 1;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
}

/* Header */
.main-header {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md) var(--spacing-md);
}

.main-header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.main-header .emoji {
    font-size: 2.2rem;
}

.main-header .subtitle {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
}

/* Secciones del Home */
.home-section {
    margin-bottom: 3rem;
}

.home-section h2 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

/* Grilla de juegos */
.games-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

/* Card especial para "Hoy" y "Continuar" */
.hero-card {
    background-color: var(--color-surface);
    border-radius: var(--radius-card);
    padding: var(--spacing-xl);
    text-align: center;
    border: 2px solid var(--color-border);
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
}

.hero-card.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    border-style: dashed;
}

.hero-card h3 {
    font-size: 2rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.hero-card p {
    color: var(--color-text-secondary);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
}

/* Game Card */
.game-card {
    background-color: var(--color-surface);
    border-radius: var(--radius-card);
    padding: var(--spacing-xl);
    text-align: center;
    border: 2px solid var(--color-border);
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    overflow: hidden;
}

@media (hover: hover) and (pointer: fine) {
    .game-card:not(.locked):hover {
        transform: translateY(-5px);
        border-color: var(--color-accent);
        box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    }
}

.game-card.locked {
    opacity: 0.6;
    border-style: dashed;
}

.game-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    line-height: 1;
}

.game-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.game-desc {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    flex-grow: 1;
}

/* Botones */
.game-btn {
    background-color: var(--color-accent);
    color: #000;
    font-family: var(--font-main);
    font-weight: 600;
    font-size: 1rem;
    border: none;
    border-radius: var(--radius-button);
    padding: 0.75rem 1.5rem;
    width: 100%;
    cursor: pointer;
    transition: opacity 0.2s ease;
}

@media (hover: hover) and (pointer: fine) {
    .game-btn:hover:not(:disabled) {
        opacity: 0.9;
    }
}

.game-btn:disabled {
    background-color: var(--color-surface-elevated);
    color: var(--color-text-secondary);
    cursor: not-allowed;
}

/* Sello de bloqueado */
.locked-badge {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%) rotate(-5deg);
    background-color: rgba(0, 0, 0, 0.85);
    color: var(--color-text-primary);
    padding: 0.4rem 1.2rem;
    font-weight: 800;
    font-size: 1rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-button);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    backdrop-filter: blur(4px);
    z-index: 10;
    white-space: nowrap;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.5);
    pointer-events: none;
}

/* Footer */
.main-footer {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

/* UI Components (Toasts) */
.toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background-color: var(--color-surface-elevated);
    color: var(--color-text-primary);
    padding: 12px 24px;
    border-radius: var(--radius-button);
    border-left: 4px solid var(--color-accent);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    font-weight: 600;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 1000;
    opacity: 0;
}

.toast.toast-info {
    border-left-color: var(--color-accent);
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

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

/* ==========================================================================
   JUEGO: ¿QUÉ ESCUDO ES?
   ========================================================================== */

/* Animaciones de feedback */
@keyframes flashSuccess {
    0% { background-color: var(--color-surface); }
    50% { background-color: var(--color-success); color: #000; }
    100% { background-color: var(--color-surface); }
}

@keyframes flashError {
    0% { background-color: var(--color-surface); }
    50% { background-color: #ef4444; color: #fff; }
    100% { background-color: var(--color-surface); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* Layout General del Juego */
.game-layout {
    display: flex;
    flex-direction: column;
    min-height: 100%;
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
}

.game-header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.btn-volver {
    background: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-button);
    padding: 0.5rem 1rem;
    cursor: pointer;
    font-family: var(--font-main);
    font-weight: 600;
    transition: all 0.2s ease;
}

@media (hover: hover) and (pointer: fine) {
    .btn-volver:hover {
        color: var(--color-text-primary);
        border-color: var(--color-text-primary);
        background: rgba(255, 255, 255, 0.05);
    }
}

.game-title-center {
    text-align: center;
}

.game-title-center h2 {
    font-size: 1.5rem;
    margin-bottom: 0.2rem;
}

.game-title-center .diff-label {
    font-size: 0.8rem;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.game-stats-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-weight: 600;
}

.hearts {
    display: flex;
    gap: 4px;
    color: #ef4444;
    font-size: 1.2rem;
}

.hearts .lost {
    color: var(--color-surface-elevated);
    filter: grayscale(100%);
}

.score-display {
    font-size: 1.2rem;
    color: var(--color-text-primary);
    background: var(--color-surface-elevated);
    padding: 0.2rem 0.8rem;
    border-radius: 20px;
}

/* Selección de Dificultad */
.difficulty-selection {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.diff-card {
    background-color: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-card);
    padding: var(--spacing-lg);
    text-align: left;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
}

@media (hover: hover) and (pointer: fine) {
    .diff-card:hover {
        border-color: var(--color-accent);
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    }
}

.diff-card h3 {
    font-size: 1.3rem;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
}

.diff-card p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

/* Pantalla de Juego (Escudo y Opciones) */
.shield-container {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-xl) 0;
    min-height: 250px;
}

.shield-img {
    max-width: 250px;
    max-height: 250px;
    width: 60%;
    object-fit: contain;
    filter: drop-shadow(0 10px 15px rgba(0,0,0,0.3));
    transition: transform 0.3s ease;
}

.shield-placeholder {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-surface-elevated), var(--color-border));
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 3rem;
    font-weight: 800;
    color: var(--color-text-primary);
    box-shadow: inset 0 0 20px rgba(0,0,0,0.5);
    border: 4px solid var(--color-surface);
}

/* Opciones Fácil/Media */
.options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.option-btn {
    background-color: var(--color-surface);
    color: var(--color-text-primary);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-button);
    padding: 1rem;
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font-main);
    cursor: pointer;
    transition: all 0.2s ease;
}

@media (hover: hover) and (pointer: fine) {
    .option-btn:hover:not(:disabled) {
        border-color: var(--color-text-secondary);
        background-color: var(--color-surface-elevated);
    }
}

.option-btn:disabled {
    cursor: default;
    opacity: 0.8;
}

.option-btn.correct {
    animation: flashSuccess 0.6s ease;
    border-color: var(--color-success);
    background-color: var(--color-success);
    color: #000;
}

.option-btn.wrong {
    animation: flashError 0.6s ease, shake 0.4s ease;
    border-color: #ef4444;
    background-color: #ef4444;
    color: #fff;
}

/* Input Difícil */
.hard-mode-input {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.hard-mode-input input {
    flex: 1;
    background-color: var(--color-surface);
    border: 2px solid var(--color-border);
    color: var(--color-text-primary);
    padding: 1rem;
    font-size: 1.1rem;
    border-radius: var(--radius-button);
    font-family: var(--font-main);
    outline: none;
    transition: border-color 0.2s;
}

.hard-mode-input input:focus {
    border-color: var(--color-accent);
}

.hard-mode-input input.correct {
    border-color: var(--color-success);
    background-color: rgba(74, 222, 128, 0.1);
}

.hard-mode-input input.wrong {
    border-color: #ef4444;
    background-color: rgba(239, 68, 68, 0.1);
    animation: shake 0.4s ease;
}

.btn-adivinar {
    background-color: var(--color-accent);
    color: #000;
    border: none;
    padding: 0 1.5rem;
    font-weight: 800;
    font-size: 1rem;
    border-radius: var(--radius-button);
    cursor: pointer;
    transition: opacity 0.2s;
}

@media (hover: hover) and (pointer: fine) {
    .btn-adivinar:hover {
        opacity: 0.9;
    }
}

/* Pantalla de Fin */
.game-over-screen {
    text-align: center;
    padding: var(--spacing-xl) 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.game-over-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-text-primary);
}

.final-score {
    font-size: 5rem;
    font-weight: 800;
    color: var(--color-accent);
    line-height: 1;
    margin: var(--spacing-sm) 0;
}

.final-time {
    color: var(--color-text-secondary);
    font-size: 1.2rem;
}

.motivational-msg {
    font-size: 1.2rem;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-lg);
}

.record-badge {
    background-color: var(--color-success);
    color: #000;
    padding: 0.3rem 1rem;
    border-radius: 20px;
    font-weight: 800;
    font-size: 0.9rem;
    display: inline-block;
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 1px;
    animation: pulse 2s infinite;
}

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

.game-over-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    width: 100%;
    max-width: 300px;
    margin-top: var(--spacing-md);
}

.btn-primary {
    background-color: var(--color-accent);
    color: #000;
    border: none;
    padding: 1rem;
    border-radius: var(--radius-button);
    font-weight: 800;
    font-size: 1.1rem;
    cursor: pointer;
    font-family: var(--font-main);
}

.btn-secondary {
    background-color: var(--color-surface);
    color: var(--color-text-primary);
    border: 2px solid var(--color-border);
    padding: 1rem;
    border-radius: var(--radius-button);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    font-family: var(--font-main);
}

/* Card Hero para Destacados */
.destacado-hero {
    grid-column: 1 / -1;
    background-color: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-card);
    padding: var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    cursor: pointer;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

@media (hover: hover) and (pointer: fine) {
    .destacado-hero:hover {
        transform: translateY(-3px);
        border-color: var(--color-accent);
        box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    }
}

.destacado-hero-icon {
    font-size: 3.5rem;
    line-height: 1;
    flex-shrink: 0;
}

.destacado-hero-body {
    flex: 1;
    text-align: left;
}

.destacado-hero-title {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.destacado-hero-desc {
    color: var(--color-text-secondary);
    font-size: 1rem;
    line-height: 1.5;
}

.destacado-hero-btn {
    width: auto;
    flex-shrink: 0;
    padding: 0.75rem 2rem;
}

/* Responsividad para móviles */
@media (max-width: 640px) {
    .games-grid {
        grid-template-columns: 1fr;
    }
    
    .options-grid {
        grid-template-columns: 1fr;
    }
    
    .shield-container {
        min-height: auto;
        padding: var(--spacing-md) 0;
    }

    .shield-img {
        max-width: 160px;
        max-height: 160px;
        width: 50%;
    }

    .shield-placeholder {
        width: 140px;
        height: 140px;
        font-size: 2rem;
    }

    .destacado-hero {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-md);
    }

    .destacado-hero-body {
        text-align: center;
    }

    .destacado-hero-btn {
        width: 100%;
    }
}