/* ============================================
   VARIABLES Y SISTEMA DE DISEÑO
   ============================================ */
:root {
    /* Colores Primarios */
    --color-primary: #004D40;
    --color-accent-gold: #CCA43B;
    --color-accent-brown: #5D4037;
    --color-gray-soft: #B0BEC5;
    
    /* Colores Neutrales */
    --color-white: #FFFFFF;
    --color-off-white: #F8F8F8;
    --color-dark-gray: #333333;
    
    /* Tipografía */
    --font-serif: 'Georgia', 'Garamond', serif;
    --font-sans: 'Segoe UI', 'Roboto', 'Helvetica Neue', sans-serif;
    
    /* Espaciado */
    --spacing-unit: 16px;
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    
    /* Radios y Bordes */
    --radius-small: 2px;
    --radius-medium: 4px;
    
    /* Sombras */
    --shadow-subtle: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-medium: 0 4px 16px rgba(0, 0, 0, 0.12);
    
    /* Anchos de Contenedor */
    --container-max: 1280px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-serif);
    color: var(--color-dark-gray);
    background-color: var(--color-off-white);
    line-height: 1.6;
    font-size: 16px;
}

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

/* ============================================
   TIPOGRAFÍA
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-sans);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: 3.5rem;
    letter-spacing: -0.02em;
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
}

h2 {
    font-size: 2.5rem;
    color: var(--color-primary);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

h3 {
    font-size: 1.75rem;
    color: var(--color-accent-brown);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

h4 {
    font-size: 1.25rem;
    color: var(--color-dark-gray);
}

p {
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
    font-size: 1.05rem;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.3s ease, border-color 0.3s ease;
}

a:hover {
    color: var(--color-accent-gold);
}

/* ============================================
   ENCABEZADO (HEADER)
   ============================================ */
.site-header {
    background-color: var(--color-primary);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-subtle);
}

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

.logo a {
    display: inline-block;
    color: var(--color-white);
    text-decoration: none;
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    transition: opacity 0.3s ease;
}

.logo a:hover {
    opacity: 0.8;
    color: var(--color-white);
}

.main-nav {
    flex: 1;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--color-white);
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding-bottom: 8px;
    border-bottom: 2px solid transparent;
    transition: border-color 0.3s ease, color 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    border-bottom-color: var(--color-accent-gold);
    color: var(--color-accent-gold);
}

/* ============================================
   PIE DE PÁGINA (FOOTER)
   ============================================ */
.site-footer {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section {
    display: flex;
    flex-direction: column;
}

.footer-title {
    font-family: var(--font-sans);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--color-accent-gold);
}

.footer-subtitle {
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-md);
}

.footer-text {
    color: var(--color-gray-soft);
    line-height: 1.6;
    margin-bottom: 0;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: var(--color-gray-soft);
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--color-accent-gold);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-md);
    text-align: center;
    color: var(--color-gray-soft);
    font-size: 0.95rem;
}

/* ============================================
   SECCIONES Y MÓDULOS
   ============================================ */
.section {
    padding: var(--spacing-xl) 0;
}

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

.section--primary h2,
.section--primary h3 {
    color: var(--color-accent-gold);
}

.section--accent {
    background-color: var(--color-accent-brown);
    color: var(--color-white);
}

.section--light {
    background-color: var(--color-gray-soft);
}

/* ============================================
   GRID Y COMPOSICIÓN
   ============================================ */
.grid {
    display: grid;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.grid--two-col {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid--three-col {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid--four-col {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* ============================================
   TARJETAS
   ============================================ */
.card {
    background-color: var(--color-white);
    border-radius: var(--radius-medium);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-subtle);
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.card:hover {
    box-shadow: var(--shadow-medium);
    transform: translateY(-2px);
}

.card-title {
    font-family: var(--font-sans);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.card-content {
    color: var(--color-dark-gray);
    line-height: 1.7;
}

/* ============================================
   IMÁGENES Y MEDIOS
   ============================================ */
.image-block {
    margin: var(--spacing-lg) 0;
    border-radius: var(--radius-medium);
    overflow: hidden;
    box-shadow: var(--shadow-medium);
}

.image-block img {
    width: 100%;
    height: auto;
    display: block;
}

.image-with-caption {
    text-align: center;
}

.image-caption {
    font-style: italic;
    color: var(--color-gray-soft);
    margin-top: var(--spacing-sm);
    font-size: 0.95rem;
}

/* ============================================
   LISTAS
   ============================================ */
ul, ol {
    margin: var(--spacing-md) 0;
    margin-left: var(--spacing-lg);
}

li {
    margin-bottom: var(--spacing-sm);
    line-height: 1.7;
}

/* ============================================
   BOTONES Y ENLACES
   ============================================ */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--color-primary);
    color: var(--color-white);
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-small);
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn:hover {
    background-color: var(--color-accent-brown);
    border-color: var(--color-accent-brown);
    color: var(--color-white);
}

.btn--secondary {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

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

/* ============================================
   FORMULARIOS
   ============================================ */
.form-group {
    margin-bottom: var(--spacing-lg);
}

label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-sans);
    font-weight: 600;
    color: var(--color-dark-gray);
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="subject"],
textarea,
select {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--color-gray-soft);
    border-radius: var(--radius-medium);
    font-family: var(--font-sans);
    font-size: 1rem;
    background-color: var(--color-white);
    transition: border-color 0.3s ease;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus,
input[type="subject"]:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(0, 77, 64, 0.1);
}

textarea {
    resize: vertical;
    min-height: 150px;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-xl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero h1 {
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-lg);
    color: var(--color-accent-gold);
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 1.8rem;
    }

    h3 {
        font-size: 1.35rem;
    }

    .header-content {
        flex-direction: column;
        gap: var(--spacing-md);
    }

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

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

    .grid--two-col,
    .grid--three-col,
    .grid--four-col {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   UTILIDADES
   ============================================ */
.text-center {
    text-align: center;
}

.text-justify {
    text-align: justify;
}

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.py-1 { padding: var(--spacing-sm) 0; }
.py-2 { padding: var(--spacing-md) 0; }
.py-3 { padding: var(--spacing-lg) 0; }
.py-4 { padding: var(--spacing-xl) 0; }