/* ========================================
   COMPARADOR DE TIPO DE CAMBIO - ESTILOS
   Arquitectura: Block Element Modifier (BEM)
   ======================================== */

/* ========================================
   VARIABLES Y TEMAS
   ======================================== */
:root {
    /* Colores principales del dashboard */
    --color-primary: #2563eb;
    --color-secondary: #f59e0b;
    --color-success: #10b981;
    --color-danger: #ef4444;
    --color-dark: #1f2937;
    --color-light: #f3f4f6;
    --color-lighter: #f9fafb;
    --color-border: #e5e7eb;
    --color-text: #111827;
    --color-text-secondary: #6b7280;

    /* Colores por entidad */
    --color-entity-bcr: #2563eb;
    --color-entity-bac: #ef4444;
    --color-entity-moneyfex: #10b981;
    --color-entity-ari: #7c3aed;

    /* Espaciado usando escala de 8px */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Bordes redondeados para aspecto moderno */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;

    /* Sombras sutiles para profundidad */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    /* Transiciones suave para interacciones */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--color-lighter);
    color: var(--color-text);
    line-height: 1.6;
}

/* ========================================
   BARRA DE NAVEGACIÓN (navbar)
   ======================================== */

.navbar {
    background: white;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: var(--spacing-md) var(--spacing-xl);
}

.navbar__container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    text-decoration: none;
    color: var(--color-text);
    font-weight: 700;
    font-size: 1.5rem;
    transition: var(--transition);
}

.navbar__logo:hover {
    opacity: 0.8;
}

.navbar__logo-icon {
    color: var(--color-primary);
    font-size: 1.8rem;
}

.navbar__subtitle {
    color: var(--color-text-secondary);
    font-size: 0.75rem;
    font-weight: 400;
    margin-top: 0.25rem;
}

/* ========================================
   CONTENEDORES Y LAYOUTS
   ======================================== */

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

.grid {
    display: grid;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.grid--2col {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.grid--3col {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

/* ========================================
   SECCIÓN HERO
   ======================================== */

.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, #1e40af 100%);
    color: white;
    padding: var(--spacing-2xl) var(--spacing-xl);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-2xl);
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.hero__title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.hero__subtitle {
    font-size: 1.1rem;
    opacity: 0.95;
    margin-bottom: var(--spacing-xl);
    font-weight: 300;
}

.hero__badge {
    display: inline-block;
    background: var(--color-secondary);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 0.9rem;
    margin-top: var(--spacing-md);
    animation: pulse 2s infinite;
}

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

/* ========================================
   ENCABEZADOS DE SECCIONES
   ======================================== */

.section {
    margin-bottom: var(--spacing-2xl);
}

.section__header {
    margin-bottom: var(--spacing-xl);
}

.section__title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.section__title-icon {
    color: var(--color-primary);
    font-size: 1.8rem;
}

.section__subtitle {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

/* ========================================
   TARJETAS (card)
   ======================================== */

.card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.card__header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.card__icon {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    flex-shrink: 0;
}

/* Modificadores de color para iconos por entidad */
.card__icon--bcr {
    background: var(--color-entity-bcr);
}

.card__icon--bac {
    background: var(--color-entity-bac);
}

.card__icon--moneyfex {
    background: var(--color-entity-moneyfex);
}

.card__icon--ari {
    background: var(--color-entity-ari);
}

.card__title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text);
}

.card__subtitle {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    margin-top: var(--spacing-xs);
}

/* ========================================
   VISUALIZACIÓN DE TASAS (rates)
   ======================================== */

.rates {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.rates__item {
    background: var(--color-light);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
    border: 2px solid transparent;
    transition: var(--transition);
}

.rates__label {
    display: block;
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.rates__value {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-text);
    word-break: break-word;
    overflow-wrap: break-word;
}

/* Modificadores para destacar mejores tasas */
.rates__item--best-compra {
    background: rgba(16, 185, 129, 0.1);
    border-color: var(--color-success);
}

.rates__item--best-compra .rates__value {
    color: var(--color-success);
}

.rates__item--best-venta {
    background: rgba(239, 68, 68, 0.1);
    border-color: var(--color-danger);
}

.rates__item--best-venta .rates__value {
    color: var(--color-danger);
}

/* ========================================
   TABLA COMPARATIVA (table)
   ======================================== */

.table-wrapper {
    overflow-x: auto;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}

.table__thead {
    background: var(--color-light);
    border-bottom: 2px solid var(--color-border);
}

.table__th {
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 600;
    color: var(--color-text);
}

.table__tbody tr:hover {
    background: var(--color-lighter);
}

.table__td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text);
}

.table__entity-name {
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.table__entity-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.9rem;
    flex-shrink: 0;
}

/* Modificadores de color para iconos por entidad */
.table__entity-icon--bcr {
    background: var(--color-entity-bcr);
}

.table__entity-icon--bac {
    background: var(--color-entity-bac);
}

.table__entity-icon--moneyfex {
    background: var(--color-entity-moneyfex);
}

.table__entity-icon--ari {
    background: var(--color-entity-ari);
}

.table__td--best-compra {
    background: rgba(16, 185, 129, 0.15);
    font-weight: 600;
    color: var(--color-success);
}

.table__td--best-venta {
    background: rgba(239, 68, 68, 0.15);
    font-weight: 600;
    color: var(--color-danger);
}

/* ========================================
   GRÁFICO HISTORICO (chart)
   ======================================== */

.chart-wrapper {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
    margin-bottom: var(--spacing-2xl);
    min-height: 320px;
    position: relative;
}

.chart-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 280px;
    color: var(--color-text-secondary);
    gap: var(--spacing-md);
}

.chart-loading i {
    font-size: 2rem;
    color: var(--color-primary);
}

.chart-loading p {
    font-size: 0.95rem;
}

.chart-no-data {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 280px;
    color: var(--color-text-secondary);
    gap: var(--spacing-md);
}

.chart-no-data i {
    font-size: 2.5rem;
    opacity: 0.5;
}

.chart-no-data p {
    font-size: 0.95rem;
}

.chart-placeholder {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-md);
    border: 2px dashed var(--color-border);
    text-align: center;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-2xl);
}

.chart-placeholder__icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.chart-placeholder__title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

/* ========================================
   PIE DE PÁGINA (footer)
   ======================================== */

.footer {
    background: var(--color-light);
    padding: var(--spacing-2xl) var(--spacing-xl);
    text-align: center;
    color: var(--color-text-secondary);
    border-top: 1px solid var(--color-border);
    margin-top: var(--spacing-2xl);
}

.footer__text {
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
}

.footer__links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-md);
    font-size: 0.85rem;
}

.footer__link {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition);
}

.footer__link:hover {
    text-decoration: underline;
}

/* ========================================
   CLASES UTILITARIAS
   ======================================== */

.u-text-center {
    text-align: center;
}

.u-mt-lg {
    margin-top: var(--spacing-lg);
}

.u-mb-lg {
    margin-bottom: var(--spacing-lg);
}

/* ========================================
   DISEÑO RESPONSIVO - TABLETS
   ======================================== */

@media (max-width: 768px) {
    .hero__title {
        font-size: 1.8rem;
    }

    .hero__subtitle {
        font-size: 1rem;
    }

    .hero {
        padding: var(--spacing-xl) var(--spacing-md);
    }

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

    .navbar {
        padding: var(--spacing-md);
    }

    .navbar__container {
        padding: 0 var(--spacing-md);
    }

    .navbar__logo {
        font-size: 1.2rem;
    }

    .section__title {
        font-size: 1.2rem;
    }

    .grid--2col,
    .grid--3col {
        grid-template-columns: 1fr;
    }

    .rates__value {
        font-size: 1.5rem;
    }

    .table {
        font-size: 0.85rem;
    }

    .table__th,
    .table__td {
        padding: var(--spacing-sm);
    }

    .footer__links {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

/* ========================================
   DISEÑO RESPONSIVO - MÓVILES
   ======================================== */

@media (max-width: 480px) {
    .hero__title {
        font-size: 1.5rem;
    }

    .hero__subtitle {
        font-size: 0.9rem;
    }

    .section__title {
        font-size: 1rem;
    }

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

    .navbar__logo {
        font-size: 1rem;
    }
}