/* ==================== VARIABLES ==================== */
:root {
    --color-primary: #667eea;
    --color-primary-dark: #5568d3;
    --color-secondary: #764ba2;
    --color-success: #48bb78;
    --color-danger: #f56565;
    --color-warning: #ed8936;
    --color-info: #4299e1;
    
    --color-bg: #0f0e17;
    --color-bg-secondary: #1a1825;
    --color-bg-tertiary: #252332;
    --color-text: #fffffe;
    --color-text-secondary: #a7a9be;
    --color-border: #2e2d3d;
    
    --font-main: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.16), 0 2px 4px rgba(0, 0, 0, 0.23);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.19), 0 6px 6px rgba(0, 0, 0, 0.23);
    --shadow-xl: 0 15px 30px rgba(0, 0, 0, 0.25), 0 10px 10px rgba(0, 0, 0, 0.22);
    
    --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
}

/* ==================== RESET Y BASE ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-main);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
}

/* ==================== CONTAINER ==================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* ==================== PANTALLAS ==================== */
.pantalla {
    display: none;
    animation: fadeIn 0.5s ease-in;
}

.pantalla.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== INICIO ==================== */
.hero {
    text-align: center;
    padding: 60px 20px;
    background: var(--gradient-hero);
    border-radius: 20px;
    margin-bottom: 40px;
    box-shadow: var(--shadow-xl);
}

.titulo-principal {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    background: linear-gradient(45deg, #fff, #f0f0f0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitulo {
    font-size: 1.5rem;
    margin-bottom: 15px;
    opacity: 0.95;
}

.descripcion {
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
    opacity: 0.9;
}

/* ==================== AUTH ==================== */
.auth-container {
    max-width: 500px;
    margin: 0 auto 60px;
    background: var(--color-bg-secondary);
    border-radius: 15px;
    padding: 30px;
    box-shadow: var(--shadow-lg);
}

.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    border-bottom: 2px solid var(--color-border);
}

.tab {
    flex: 1;
    padding: 12px 20px;
    background: transparent;
    border: none;
    color: var(--color-text-secondary);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.3s;
    border-bottom: 3px solid transparent;
}

.tab.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

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

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ==================== FORMS ==================== */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--color-text);
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    background: var(--color-bg-tertiary);
    border: 2px solid var(--color-border);
    border-radius: 8px;
    color: var(--color-text);
    font-size: 1rem;
    transition: all 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group small {
    display: block;
    margin-top: 5px;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.form-label {
    display: block;
    margin-bottom: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--color-bg-tertiary);
    border: 2px solid var(--color-border);
    border-radius: 8px;
    color: var(--color-text);
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.form-help {
    display: block;
    margin-top: 8px;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    font-style: italic;
}

.form-section {
    margin-bottom: 30px;
}

/* ==================== BUTTONS ==================== */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    width: 100%;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-hero {
    background: var(--gradient-hero);
    color: white;
    padding: 18px 36px;
    font-size: 1.2rem;
    border-radius: 12px;
    margin-bottom: 30px;
}

.btn-large {
    padding: 16px 32px;
    font-size: 1.1rem;
}

.btn-back {
    background: var(--color-bg-tertiary);
    color: var(--color-text);
    padding: 8px 16px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s;
}

.btn-back:hover {
    background: var(--color-border);
}

.loading {
    display: inline-block;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ==================== CARACTERÍSTICAS ==================== */
.caracteristicas {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.caracteristica {
    text-align: center;
    padding: 30px;
    background: var(--color-bg-secondary);
    border-radius: 15px;
    transition: all 0.3s;
}

.caracteristica:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.caracteristica .icono {
    font-size: 3rem;
    display: block;
    margin-bottom: 15px;
}

.caracteristica h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--color-primary);
}

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

/* ==================== NAVBAR ==================== */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    background: var(--color-bg-secondary);
    border-radius: 12px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-md);
}

.nav-brand {
    font-size: 1.3rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 15px;
}

.badge {
    background: var(--color-primary);
    color: white;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

/* ==================== MENÚ ==================== */
.menu-content {
    padding: 20px 0;
}

.menu-content h2 {
    font-size: 2rem;
    margin-bottom: 30px;
    text-align: center;
}

.partidas-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.partida-card {
    background: var(--color-bg-secondary);
    border-radius: 12px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.3s;
    border: 2px solid transparent;
}

.partida-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
}

.partida-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 15px;
}

.partida-genero {
    background: var(--color-primary);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.partida-completada {
    background: var(--color-success);
}

.partida-titulo {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--color-text);
}

.partida-info {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-bottom: 5px;
}

.partida-stats {
    display: flex;
    gap: 15px;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--color-border);
}

.stat {
    flex: 1;
    text-align: center;
}

.stat-label {
    display: block;
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    margin-bottom: 5px;
}

.stat-value {
    display: block;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-primary);
}

.mensaje-vacio {
    text-align: center;
    padding: 60px 20px;
    color: var(--color-text-secondary);
}

.mensaje-vacio p {
    font-size: 1.2rem;
}

/* ==================== CONFIGURACIÓN ==================== */
.config-content {
    max-width: 800px;
    margin: 0 auto;
}

.config-content h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 40px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.opciones-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 15px;
}

.opcion-card {
    position: relative;
    cursor: pointer;
}

.opcion-card input[type="radio"] {
    position: absolute;
    opacity: 0;
}

.opcion-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 20px;
    background: var(--color-bg-tertiary);
    border: 3px solid var(--color-border);
    border-radius: 12px;
    transition: all 0.3s;
}

.opcion-card input:checked + .opcion-content {
    border-color: var(--color-primary);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    box-shadow: var(--shadow-md);
}

.opcion-card:hover .opcion-content {
    transform: translateY(-3px);
    border-color: var(--color-primary);
}

.opcion-icono {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.opcion-titulo {
    display: block;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 5px;
    color: var(--color-text);
}

.opcion-desc {
    display: block;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* ==================== NOTIFICACIONES ==================== */
.notificacion {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 16px 24px;
    border-radius: 12px;
    box-shadow: var(--shadow-xl);
    z-index: 9999;
    max-width: 400px;
    animation: slideInRight 0.3s ease;
    display: none;
}

.notificacion.show {
    display: block;
}

.notificacion.success {
    background: var(--color-success);
    color: white;
}

.notificacion.error {
    background: var(--color-danger);
    color: white;
}

.notificacion.info {
    background: var(--color-info);
    color: white;
}

@keyframes slideInRight {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
    .titulo-principal {
        font-size: 2.5rem;
    }
    
    .subtitulo {
        font-size: 1.2rem;
    }
    
    .caracteristicas {
        grid-template-columns: 1fr;
    }
    
    .opciones-grid {
        grid-template-columns: 1fr;
    }
    
    .navbar {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .partidas-grid {
        grid-template-columns: 1fr;
    }
}