/* ============================================
   ESTILOS GLOBALES
   ============================================ */

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

/* Variables CSS */
:root {
    --color-primary: #2ba1d7;
    --color-primary-dark: #2391c3;
    --color-secondary: #5ecb8c;
    --color-accent: #00674a;
    --color-text: #333;
    --color-text-light: #666;
    --color-border: #e0e0e0;
    --color-bg: #f8f9fa;
    --color-white: #ffffff;
    --color-error: #dc3545;
    --color-success: #28a745;

    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;

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

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.1);
}

/* Body */
body {
    font-family: var(--font-family);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
    min-height: 100vh;
    padding-bottom: 70px; /* Espacio para el menú inferior fijo */
}

/* Main */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    min-height: calc(100vh - 200px);
}

/* Page Header */
.page-header {
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.page-header h1 {
    font-size: 2rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.page-subtitle {
    color: var(--color-text-light);
    font-size: 1rem;
}

/* Grid layouts */
.categorias-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

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

/* Cards */
.historial-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-md);
    display: flex;
    gap: var(--spacing-md);
    transition: box-shadow 0.3s ease;
}

.historial-card:hover {
    box-shadow: var(--shadow-md);
}

.historial-image {
    flex-shrink: 0;
    width: 120px;
    height: 120px;
    border-radius: var(--radius-md);
    overflow: hidden;
    background-color: var(--color-bg);
}

.historial-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

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

.historial-title {
    font-size: 1.1rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.historial-empresa {
    color: var(--color-primary);
    font-size: 0.9rem;
    font-weight: 500;
}

.historial-descuento {
    color: var(--color-accent);
    font-weight: bold;
    font-size: 1rem;
}

.historial-fecha {
    color: var(--color-text-light);
    font-size: 0.85rem;
}

.historial-codigo {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm);
    background-color: var(--color-bg);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.codigo-label {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

.codigo-value {
    font-family: monospace;
    font-weight: bold;
    color: var(--color-text);
    font-size: 1rem;
}

.codigo-copy-btn {
    margin-left: auto;
    padding: 4px 12px;
    background-color: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.85rem;
    transition: background-color 0.2s ease;
}

.codigo-copy-btn:hover {
    background-color: var(--color-primary-dark);
}

/* Utilidades */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

/* Loading indicator para scroll infinito */
.load-more-indicator {
    grid-column: 1 / -1;
    padding: var(--spacing-md);
}

/* Detalle de Cupón */
.cupon-detalle-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    max-width: 800px;
    margin: 0 auto;
}

.cupon-detalle-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.btn-back {
    background: none;
    border: none;
    color: var(--color-primary);
    cursor: pointer;
    font-size: 1rem;
    padding: var(--spacing-sm);
    transition: color 0.2s ease;
}

.btn-back:hover {
    color: var(--color-primary-dark);
}

.cupon-detalle-image {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 */
    background-color: var(--color-bg);
    overflow: hidden;
}

.cupon-detalle-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.cupon-detalle-discount {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background-color: var(--color-accent);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    font-weight: bold;
    font-size: 1.25rem;
    box-shadow: var(--shadow-md);
}

.cupon-detalle-content {
    padding: var(--spacing-lg);
}

.cupon-detalle-title {
    font-size: 1.75rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.cupon-detalle-empresa,
.cupon-detalle-expiry {
    font-size: 0.95rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.cupon-detalle-description {
    margin: var(--spacing-md) 0;
    line-height: 1.6;
    color: var(--color-text);
}

.btn-obtener-cupon {
    width: 100%;
    padding: var(--spacing-md);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    margin: var(--spacing-lg) 0;
}

.btn-obtener-cupon:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-obtener-cupon:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.codigo-container {
    margin: var(--spacing-md) 0;
}

.codigo-generado {
    background-color: var(--color-bg);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 2px solid var(--color-primary);
}

.codigo-sms {
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: #e3f2fd;
    border-radius: var(--radius-sm);
}

.codigo-texto-container {
    margin: var(--spacing-md) 0;
}

.codigo-label {
    display: block;
    font-weight: bold;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.codigo-valor-wrapper {
    display: flex;
    gap: var(--spacing-sm);
}

.codigo-valor {
    flex: 1;
    padding: var(--spacing-md);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-sm);
    font-family: monospace;
    font-size: 1.25rem;
    font-weight: bold;
    text-align: center;
    background-color: white;
}

.codigo-copiar-btn {
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: bold;
    transition: background-color 0.2s ease;
}

.codigo-copiar-btn:hover {
    background-color: var(--color-primary-dark);
}

.codigo-link-container {
    text-align: center;
    margin: var(--spacing-md) 0;
}

.codigo-link-btn {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    background-color: var(--color-primary);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: bold;
    transition: background-color 0.2s ease, transform 0.2s ease;
}

.codigo-link-btn:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-2px);
}

.codigo-link-url {
    margin-top: var(--spacing-sm);
    font-size: 0.85rem;
    color: var(--color-text-light);
    word-break: break-all;
}

.codigo-instrucciones {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: #fff3cd;
    border-radius: var(--radius-sm);
}

.cupon-detalle-section {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.cupon-detalle-section h3 {
    font-size: 1.25rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.cupon-detalle-instructions,
.cupon-detalle-legal {
    line-height: 1.6;
    color: var(--color-text-light);
}

.cupon-detalle-legal {
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    main {
        padding: var(--spacing-md);
    }

    .page-header h1 {
        font-size: 1.5rem;
    }

    .categorias-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: var(--spacing-md);
    }

    .historial-card {
        flex-direction: column;
    }

    .historial-image {
        width: 100%;
        height: 180px;
    }

    .historial-codigo {
        flex-direction: column;
        align-items: stretch;
    }

    .codigo-copy-btn {
        margin-left: 0;
        width: 100%;
    }
}

@media (max-width: 480px) {
    .page-header h1 {
        font-size: 1.25rem;
    }

    .categorias-grid {
        grid-template-columns: 1fr;
    }
}