/* ═══════════════════════════════════════════════════════════════
   ForIndex.css — Sistema de Diseño Institucional UNC Posgrado
   Paleta: Azul Marino · Dorado · Gris Neutro
   ═══════════════════════════════════════════════════════════════ */

/* ── Variables Globales ── */
:root {
    --navy-900: #0a1628;
    --navy-800: #0f2040;
    --navy-700: #142d54;
    --navy-600: #1a3a6a;
    --navy-500: #1e4d8c;

    --gold-500: #c9a84c;
    --gold-400: #d4b96a;
    --gold-300: #e0cb8e;
    --gold-600: #a88a3a;

    --neutral-50: #f8fafc;
    --neutral-100: #f1f5f9;
    --neutral-200: #e2e8f0;
    --neutral-300: #cbd5e1;
    --neutral-400: #94a3b8;
    --neutral-500: #64748b;
    --neutral-600: #475569;
    --neutral-700: #334155;
    --neutral-800: #1e293b;
    --neutral-900: #0f172a;

    --radius-sm: 0.375rem;
    --radius-md: 0.625rem;
    --radius-lg: 1rem;
    --radius-xl: 1.25rem;
    --radius-2xl: 1.5rem;
}

/* ── Reset y Base ── */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    margin: 0;
    background-color: var(--neutral-50);
    color: var(--neutral-800);
    font-family: 'Lexend', system-ui, sans-serif;
    line-height: 1.6;
}

/* ── Layout Principal ── */
.page-wrapper {
    width: 100%;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Contenedor de secciones — fluido con tope máximo */
.section-container {
    width: 100%;
    max-width: 1140px;
    margin-left: auto;
    margin-right: auto;
    padding: 2rem 1.5rem;
}

@media (min-width: 768px) {
    .section-container {
        padding: 2.5rem 2rem;
    }
}

@media (min-width: 1280px) {
    .section-container {
        padding: 3rem 2rem;
    }
}

/* ── Botones Premium ── */
.gold-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, var(--gold-500), var(--gold-600));
    color: white;
    font-weight: 700;
    font-size: 0.7rem;
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-md);
    border: none;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(201, 168, 76, 0.3);
}

.gold-button:hover {
    filter: brightness(1.12);
    box-shadow: 0 4px 16px rgba(201, 168, 76, 0.4);
    transform: translateY(-1px);
}

.glass-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    backdrop-filter: blur(12px);
    background-color: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.18);
    color: white;
    font-weight: 600;
    font-size: 0.7rem;
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
}

.glass-button:hover {
    background-color: rgba(255, 255, 255, 0.14);
    border-color: var(--gold-400);
    transform: translateY(-1px);
}

/* ── Tarjetas ── */
.card-premium {
    background: linear-gradient(145deg, var(--navy-800), var(--navy-900));
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    transition: all 0.35s ease;
    color: white;
}

.card-premium:hover {
    border-color: var(--gold-400);
    box-shadow: 0 8px 30px rgba(10, 22, 40, 0.08);
    transform: translateY(-2px);
}

.dark .card-premium {
    background: rgba(255, 255, 255, 0.03);
    border-color: rgba(201, 168, 76, 0.08);
}

/* ── Utilidades de texto ── */
.text-gold {
    color: var(--gold-500);
}

.custom-glow {
    text-shadow: 0 0 20px rgba(201, 168, 76, 0.3);
}

/* ── Animaciones ── */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes subtlePulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

.animate-fade-in-up {
    animation: fadeInUp 0.5s ease both;
}

/* ── Dark Mode ── */
.dark body {
    background-color: var(--navy-900);
    color: var(--neutral-200);
}

.dark .page-wrapper {
    background-color: var(--navy-900);
}