:root {
    /* Color Palette - Academic Sophistication */
    --color-primary: #003366; /* Deep Navy */
    --color-secondary: #C5A059; /* Institutional Gold */
    --color-accent: #E5E7EB; /* Light Gray */
    --color-bg: #FFFFFF;
    --color-bg-alt: #F9FAFB;
    --color-text-main: #1F2937;
    --color-text-muted: #6B7280;
    --color-white: #FFFFFF;

    /* Typography - System Fonts for Offline */
    --font-display: Georgia, 'Times New Roman', Times, serif;
    --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;

    /* Spacing & Rhythm */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 2rem;
    --space-xl: 4rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
}

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

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, .display-font {
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--color-primary);
}

/* Utility Classes (Tailwind-like) */
.flex { display: flex; }
.grid { display: grid; }
.hidden { display: none; }
.text-center { text-align: center; }
.p-4 { padding: var(--space-md); }
.m-4 { margin: var(--space-md); }
.bg-primary { background-color: var(--color-primary); }
.bg-secondary { background-color: var(--color-secondary); }
.text-primary { color: var(--color-primary); }
.text-white { color: var(--color-white); }

/* Components */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background-color: #002244;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
}

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

/* Hero Section */
.hero {
    position: relative;
    height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    color: var(--color-white);
    text-align: center;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, rgba(0,51,102,0.6), rgba(0,0,0,0.8));
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: 0 2rem;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    line-height: 1.1;
    margin-bottom: 1.5rem;
    color: white;
}

/* Navigation */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-white);
    box-shadow: var(--shadow-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--color-text-main);
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--color-secondary);
}

/* Dropdown Menu */
.dropdown {
    position: relative;
}

.dropdown-toggle {
    cursor: pointer;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    min-width: 200px;
    box-shadow: var(--shadow-md);
    border-radius: 4px;
    list-style: none;
    padding: 0.5rem 0;
    z-index: 1000;
}

.dropdown:hover .dropdown-menu {
    display: block;
}

.dropdown-menu li a {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--color-text-main);
    text-decoration: none;
    transition: background 0.2s;
}

.dropdown-menu li a:hover {
    background: var(--color-bg-alt);
    color: var(--color-primary);
}

/* Service Cards Hover Effect */
.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

/* Hero Overlay */
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, rgba(0,51,102,0.6), rgba(0,0,0,0.8));
    z-index: 1;
}

/* Accordion */
.accordion {
    margin-bottom: 2rem;
}

.accordion-item {
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    margin-bottom: 1rem;
    overflow: hidden;
}

.accordion-header {
    background: var(--color-bg-alt);
    padding: 1rem 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.2s;
}

.accordion-header:hover {
    background: #e5e7eb;
}

.accordion-header h3 {
    font-size: 1.1rem;
    margin: 0;
    font-weight: 600;
}

.accordion-icon {
    font-size: 1.5rem;
    color: var(--color-primary);
    transition: transform 0.3s;
}

.accordion-item.active .accordion-icon {
    transform: rotate(180deg);
}

.accordion-content {
    display: none;
    padding: 1.5rem;
    border-top: 1px solid #e5e7eb;
}

.accordion-item.active .accordion-content {
    display: block;
}

/* Document Cards */
.documents-section {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 2px solid var(--color-secondary);
}

.documents-section h2 {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
}

.doc-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

.doc-card {
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 1.25rem;
    transition: all 0.2s;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.doc-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.doc-icon {
    font-size: 2rem;
    color: var(--color-primary);
}

.doc-info {
    flex: 1;
}

.doc-info h4 {
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
    color: var(--color-text-main);
}

.doc-info a {
    display: inline-block;
    color: var(--color-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 600;
}

.doc-info a:hover {
    color: #a08040;
}

/* Links externos */
.external-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1rem;
}

.external-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: var(--color-primary);
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    transition: all 0.2s;
}

.external-link:hover {
    background: #002244;
    transform: translateY(-2px);
}