/* ==========================================================================
   PORTAL ACADÉMICO DE PETROLOGÍA ÍGNEO-METAMÓRFICA - UNRN
   Identidad Visual Oficial Universidad Nacional de Río Negro (UNRN)
   Sistema visual profesional — Regla 60-30-10
   Rojo Institucional: #E31C3D (acento, ~10%)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&family=Lora:ital,wght@0,500;0,600;1,400;1,600&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ==========================================================================
   SISTEMA DE TOKENS — MODO OSCURO (default)
   Base: Slate (azul-pizarra), más profesional que negro puro
   ========================================================================== */
:root {
  /* --- Rojo Institucional UNRN (acento, nunca cambiar) --- */
  --unrn-red:        #E31C3D;
  --unrn-red-dark:   #C8102E;
  --unrn-red-light:  #F0445E;
  --unrn-red-subtle: rgba(227, 28, 61, 0.12);
  --unrn-red-glow:   rgba(227, 28, 61, 0.25);

  /* --- Paleta Slate (azul-pizarra, base dark) --- */
  --slate-950: #080C16;
  --slate-900: #0F172A;
  --slate-800: #1E293B;
  --slate-700: #334155;
  --slate-600: #475569;
  --slate-500: #64748B;
  --slate-400: #94A3B8;
  --slate-300: #CBD5E1;
  --slate-200: #E2E8F0;
  --slate-100: #F1F5F9;
  --slate-050: #F8FAFC;

  /* --- Paleta Stone (pardo-cálido, complementario al rojo) --- */
  --stone-800: #292524;
  --stone-700: #44403C;
  --stone-600: #57534E;
  --stone-500: #78716C;
  --stone-400: #A8A29E;
  --stone-300: #D6D3D1;
  --stone-200: #E7E5E4;
  --stone-100: #F5F4F2;

  /* --- Blanco y negro UNRN --- */
  --unrn-white: #FFFFFF;
  --unrn-gray:  #6F7072;

  /* ========================================================================
     TOKENS SEMÁNTICOS — MODO OSCURO
     ======================================================================== */

  /* 60% — Fondos y superficies principales */
  --background:  var(--slate-900);   /* #0F172A */
  --bg-primary:  var(--slate-900);
  --bg-secondary: var(--slate-950);  /* #080C16 */

  /* 30% — Superficies secundarias, cards, paneles */
  --surface:   var(--slate-800);     /* #1E293B */
  --surface-2: var(--slate-700);     /* #334155 */
  --bg-card:   var(--slate-800);
  --bg-card-hover: var(--slate-700);
  --bg-glass:  rgba(15, 23, 42, 0.92);

  /* Bordes */
  --border:        var(--slate-700);  /* #334155 */
  --border-subtle: var(--slate-700);
  --border-focus:  var(--unrn-red);
  --border-mineral: rgba(203, 213, 225, 0.2);

  /* Texto */
  --text:         #F1F5F9;            /* slate-100, ligeramente suavizado vs blanco puro */
  --text-muted:   var(--slate-400);   /* #94A3B8 */
  --text-faint:   var(--slate-500);   /* #64748B */
  --text-main:    #F1F5F9;
  --text-inverse: #0F172A;

  /* 10% — Acento: Rojo UNRN (ya definido arriba) */
  --accent-primary:      var(--unrn-red);
  --accent-primary-glow: var(--unrn-red-glow);

  /* Acentos secundarios — tonos complementarios al rojo */
  --accent-stone:       var(--stone-400);    /* pardo para clasificaciones */
  --accent-stone-subtle: rgba(168, 162, 158, 0.15);
  --accent-slate:       var(--slate-400);    /* azul-pizarra para info secundaria */
  --accent-slate-subtle: rgba(148, 163, 184, 0.12);

  /* Aliases legacy (compatibilidad) */
  --accent-emerald:      var(--unrn-red);
  --accent-emerald-glow: var(--unrn-red-glow);
  --accent-petrol:       var(--unrn-red-light);
  --accent-petrol-glow:  rgba(240, 68, 94, 0.25);
  --accent-amber:        var(--stone-300);
  --accent-amber-glow:   rgba(214, 211, 209, 0.2);
  --accent-magma:        var(--unrn-red);
  --accent-magma-glow:   var(--unrn-red-glow);
  --accent-quartz:       var(--unrn-white);

  /* ========================================================================
     BADGES POR CATEGORÍA — MODO OSCURO
     ======================================================================== */
  --badge-maficas-bg:     rgba(227, 28, 61, 0.14);
  --badge-maficas-border: rgba(227, 28, 61, 0.35);
  --badge-maficas-text:   #F0445E;

  --badge-felsicas-bg:     rgba(148, 163, 184, 0.12);
  --badge-felsicas-border: rgba(148, 163, 184, 0.30);
  --badge-felsicas-text:   var(--slate-300);

  --badge-piroclasticas-bg:     rgba(200, 16, 46, 0.16);
  --badge-piroclasticas-border: rgba(227, 28, 61, 0.40);
  --badge-piroclasticas-text:   #FFCDD6;

  /* ========================================================================
     TIPOGRAFÍAS
     ======================================================================== */
  --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body:    'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif:   'Lora', Georgia, serif;
  --font-mono:    'JetBrains Mono', monospace;

  /* ========================================================================
     SOMBRAS — Más sutiles, con matiz azul-pizarra
     ======================================================================== */
  --shadow-sm:   0 1px 3px rgba(0, 0, 0, 0.4),  0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md:   0 4px 16px -2px rgba(0, 0, 0, 0.5), 0 2px 6px rgba(0, 0, 0, 0.3);
  --shadow-lg:   0 12px 32px -6px rgba(0, 0, 0, 0.6), 0 4px 12px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 20px rgba(227, 28, 61, 0.20);
  --shadow-red-glow: 0 0 28px rgba(227, 28, 61, 0.30);

  /* ========================================================================
     RADIO Y TRANSICIONES
     ======================================================================== */
  --radius-sm:   6px;
  --radius-md:   12px;
  --radius-lg:   18px;
  --radius-full: 9999px;

  --header-height:    74px;
  --transition-fast:  0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==========================================================================
   MODO CLARO — Sistema visual completo
   60% base blanco grisáceo frío, 30% superficies blancas, 10% acento rojo
   ========================================================================== */
[data-theme="light"] {
  /* 60% — Fondos */
  --background:   #F8FAFC;    /* slate-050: blanco grisáceo frío, limpio */
  --bg-primary:   #F8FAFC;
  --bg-secondary: #F1F5F9;    /* slate-100 */

  /* 30% — Superficies */
  --surface:      #FFFFFF;
  --surface-2:    #F1F5F9;    /* slate-100 */
  --bg-card:      #FFFFFF;
  --bg-card-hover: #FAFAFA;
  --bg-glass:     rgba(255, 255, 255, 0.97);

  /* Bordes */
  --border:        #E2E8F0;   /* slate-200, suave y profesional */
  --border-subtle: #E2E8F0;
  --border-focus:  var(--unrn-red);
  --border-mineral: #CBD5E1;

  /* Texto */
  --text:         #1E293B;    /* slate-800: oscuro pero no negro puro */
  --text-muted:   #64748B;    /* slate-500 */
  --text-faint:   #94A3B8;    /* slate-400 */
  --text-main:    #1E293B;
  --text-inverse: #FFFFFF;

  /* Sombras modo claro — cálidas, sutiles */
  --shadow-sm:   0 1px 3px rgba(15, 23, 42, 0.08), 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-md:   0 4px 16px -2px rgba(15, 23, 42, 0.10), 0 2px 6px rgba(15, 23, 42, 0.06);
  --shadow-lg:   0 12px 28px -6px rgba(15, 23, 42, 0.12), 0 4px 10px rgba(15, 23, 42, 0.07);
  --shadow-glow: 0 0 18px rgba(227, 28, 61, 0.12);

  /* Badges modo claro — texto legible sobre fondos claros */
  --badge-maficas-bg:     rgba(227, 28, 61, 0.08);
  --badge-maficas-border: rgba(227, 28, 61, 0.25);
  --badge-maficas-text:   #B5122B;             /* rojo oscuro legible */

  --badge-felsicas-bg:     rgba(100, 116, 139, 0.10);
  --badge-felsicas-border: rgba(100, 116, 139, 0.25);
  --badge-felsicas-text:   #475569;             /* slate-600 */

  --badge-piroclasticas-bg:     rgba(200, 16, 46, 0.08);
  --badge-piroclasticas-border: rgba(200, 16, 46, 0.25);
  --badge-piroclasticas-text:   #9B0D20;        /* rojo muy oscuro, legible */

  /* Alias para compatibilidad */
  --accent-stone:        var(--stone-600);
  --accent-stone-subtle: rgba(87, 83, 78, 0.08);
  --accent-slate:        var(--slate-500);
  --accent-slate-subtle: rgba(100, 116, 139, 0.08);
}

/* Body en modo claro */
[data-theme="light"] body {
  background-color: #F8FAFC;
  background-image:
    radial-gradient(circle at 10% 8%, rgba(227, 28, 61, 0.04) 0%, transparent 40%),
    radial-gradient(circle at 90% 25%, rgba(200, 16, 46, 0.025) 0%, transparent 40%);
  color: #1E293B;
}

/* Header modo claro */
[data-theme="light"] .site-header {
  background: rgba(248, 250, 252, 0.97);
  border-bottom-color: #E2E8F0;
}

[data-theme="light"] .site-header.scrolled {
  background: #F8FAFC;
  border-bottom-color: #CBD5E1;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.08);
}

[data-theme="light"] .nav-link {
  color: #475569;
}

[data-theme="light"] .nav-link:hover {
  color: var(--unrn-red);
  background: rgba(227, 28, 61, 0.06);
}

[data-theme="light"] .nav-link.active {
  color: var(--unrn-red);
  background: rgba(227, 28, 61, 0.08);
}

/* Footer modo claro */
[data-theme="light"] .site-footer {
  background: #F1F5F9;
  border-top-color: #E2E8F0;
  color: #64748B;
}

[data-theme="light"] .footer-bottom {
  border-top-color: #E2E8F0;
  color: #94A3B8;
}

[data-theme="light"] .footer-col h4 {
  color: #1E293B;
}

/* Hero modo claro */
[data-theme="light"] .hero-section {
  background: transparent;
}

[data-theme="light"] .hero-title {
  background: linear-gradient(135deg, #1E293B 0%, #334155 45%, #E31C3D 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Tarjetas modo claro */
[data-theme="light"] .sample-card {
  background: #FFFFFF;
  border-color: #E2E8F0;
  color: #1E293B;
}

[data-theme="light"] .sample-card:hover {
  border-color: rgba(227, 28, 61, 0.30);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.12), 0 0 0 1px rgba(227, 28, 61, 0.15);
}

[data-theme="light"] .sample-name {
  color: #1E293B;
}

[data-theme="light"] .sample-classification {
  color: #64748B;
}

[data-theme="light"] .sample-meta-grid {
  background: #F8FAFC;
  border-color: #E2E8F0;
}

[data-theme="light"] .mineral-chip {
  background: #F1F5F9;
  border-color: #CBD5E1;
  color: #64748B;
}

[data-theme="light"] .mineral-chip.highlight {
  background: rgba(227, 28, 61, 0.08);
  border-color: rgba(227, 28, 61, 0.25);
  color: #B5122B;
}

/* Flip cards modo claro */
[data-theme="light"] .flip-card-front,
[data-theme="light"] .flip-card-back {
  border-color: #E2E8F0;
}

[data-theme="light"] .flip-card-front {
  background: #FFFFFF;
}

[data-theme="light"] .flip-card-back {
  background: #F8FAFC;
}

/* Explorer controls modo claro */
[data-theme="light"] .explorer-controls {
  background: #FFFFFF;
  border-color: #E2E8F0;
}

[data-theme="light"] .filter-category-tabs {
  border-bottom-color: #E2E8F0;
}

[data-theme="light"] .category-tab-btn {
  background: #F8FAFC;
  border-color: #CBD5E1;
  color: #475569;
}

[data-theme="light"] .category-tab-btn:hover {
  background: rgba(227, 28, 61, 0.06);
  border-color: rgba(227, 28, 61, 0.30);
  color: var(--unrn-red);
}

[data-theme="light"] .search-input {
  background: #FFFFFF;
  border-color: #CBD5E1;
  color: #1E293B;
}

[data-theme="light"] .search-input::placeholder {
  color: #94A3B8;
}

[data-theme="light"] .search-icon {
  color: #94A3B8;
}

[data-theme="light"] .filter-select {
  background: #FFFFFF;
  border-color: #CBD5E1;
  color: #1E293B;
}

[data-theme="light"] .view-mode-toggle {
  background: #F1F5F9;
  border-color: #CBD5E1;
}

[data-theme="light"] .view-mode-btn {
  color: #64748B;
}

[data-theme="light"] .btn-reset-filters {
  background: #F8FAFC;
  border-color: #CBD5E1;
  color: #64748B;
}

[data-theme="light"] .btn-reset-filters:hover {
  color: var(--unrn-red);
  border-color: rgba(227, 28, 61, 0.30);
  background: rgba(227, 28, 61, 0.06);
}

/* Lightbox modo claro */
[data-theme="light"] .lightbox-modal {
  background: rgba(241, 245, 249, 0.98);
}

[data-theme="light"] .lightbox-content-box {
  background: #FFFFFF;
  border-color: #E2E8F0;
}

[data-theme="light"] .lightbox-img-area {
  background: #F1F5F9;
}

[data-theme="light"] .lightbox-main-img {
  border-color: #CBD5E1;
  box-shadow: 0 8px 30px rgba(15, 23, 42, 0.15);
}

[data-theme="light"] .lightbox-title {
  color: #1E293B;
}

[data-theme="light"] .lightbox-caption-text {
  background: #F8FAFC;
  border-color: #E2E8F0;
  border-left-color: var(--unrn-red);
  color: #475569;
}

[data-theme="light"] .lightbox-controls {
  background: rgba(255, 255, 255, 0.95);
  border-color: #CBD5E1;
}

[data-theme="light"] .lightbox-ctrl-btn {
  color: #334155;
}

[data-theme="light"] .lightbox-close-btn {
  background: rgba(15, 23, 42, 0.08);
  color: #334155;
}

/* Comparador modo claro */
[data-theme="light"] .comparator-box {
  background: #FFFFFF;
  border-color: #E2E8F0;
}

[data-theme="light"] .comparison-column {
  background: #F8FAFC;
  border-color: #E2E8F0;
}

[data-theme="light"] .comparison-column h3 {
  color: #1E293B;
}

[data-theme="light"] .comp-thumb {
  border-color: #CBD5E1;
}

[data-theme="light"] .comp-spec-row {
  border-bottom-color: #E2E8F0;
}

[data-theme="light"] .comp-spec-row .spec-label {
  color: #64748B;
}

[data-theme="light"] .comp-spec-row .spec-value {
  color: #1E293B;
}

/* Glosario modo claro */
[data-theme="light"] .glossary-panel {
  background: #FFFFFF;
  border-color: #E2E8F0;
}

[data-theme="light"] .glossary-panel-title {
  color: #1E293B;
}

[data-theme="light"] .glossary-search-box {
  background: #F8FAFC;
  border-color: #CBD5E1;
  color: #1E293B;
}

[data-theme="light"] .abbreviations-table-wrap {
  border-color: #E2E8F0;
}

[data-theme="light"] .custom-table th {
  background: #F1F5F9;
  color: #334155;
  border-bottom-color: #CBD5E1;
}

[data-theme="light"] .custom-table td {
  border-bottom-color: #F1F5F9;
  color: #334155;
}

[data-theme="light"] .custom-table tr:hover td {
  background: rgba(227, 28, 61, 0.04);
}

[data-theme="light"] .code-badge {
  background: rgba(227, 28, 61, 0.08);
  border-color: rgba(227, 28, 61, 0.20);
  color: #B5122B;
}

/* Calendario modo claro */
[data-theme="light"] .calendar-wrapper {
  background: #FFFFFF;
  border-color: #E2E8F0;
}

[data-theme="light"] .calendar-iframe-box {
  border-color: #E2E8F0;
}

/* Team cards modo claro */
[data-theme="light"] .team-card {
  background: #FFFFFF;
  border-color: #E2E8F0;
}

[data-theme="light"] .team-card:hover {
  border-color: rgba(227, 28, 61, 0.25);
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.10);
}

[data-theme="light"] .team-name {
  color: #1E293B;
}

[data-theme="light"] .team-role {
  color: #64748B;
}

[data-theme="light"] .team-mail-btn {
  background: #F8FAFC;
  border-color: #CBD5E1;
  color: #64748B;
}

[data-theme="light"] .team-mail-btn:hover {
  background: rgba(227, 28, 61, 0.06);
  border-color: rgba(227, 28, 61, 0.25);
  color: var(--unrn-red);
}

/* Recursos modo claro */
[data-theme="light"] .resource-card {
  background: #FFFFFF;
  border-color: #E2E8F0;
}

[data-theme="light"] .resource-card:hover {
  border-color: rgba(227, 28, 61, 0.25);
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.10);
}

[data-theme="light"] .resource-name {
  color: #1E293B;
}

/* Accordión modo claro */
[data-theme="light"] .accordion-trigger-btn {
  color: #334155;
}

[data-theme="light"] .accordion-content {
  color: #475569;
}

[data-theme="light"] .epigraph-box {
  background: rgba(227, 28, 61, 0.05);
  color: #64748B;
}

/* Hero card visual modo claro */
[data-theme="light"] .hero-visual-card {
  background: #FFFFFF;
  border-color: #E2E8F0;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.10);
}

/* Nav menu mobile modo claro */
[data-theme="light"] .nav-menu {
  background: rgba(255, 255, 255, 0.99);
  border-color: #E2E8F0;
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.12);
}

/* Diagramas modo claro */
[data-theme="light"] #clasificacion .qap-images img,
[data-theme="light"] #clasificacion .piroclastico-img img,
[data-theme="light"] #clasificacion img.responsive-img {
  background-color: #FFFFFF !important;
  border-color: #CBD5E1;
}

[data-theme="light"] .qap-img-wrapper {
  background-color: #FFFFFF;
  border-color: #CBD5E1;
}

/* Diagramas modo oscuro */
[data-theme="dark"] #clasificacion .qap-images img,
[data-theme="dark"] #clasificacion .piroclastico-img img,
[data-theme="dark"] #clasificacion img.responsive-img {
  background-color: #F8FAFC !important;
  border-color: rgba(203, 213, 225, 0.2);
  border-radius: var(--radius-sm);
}

[data-theme="dark"] .qap-img-wrapper {
  background-color: #F8FAFC;
  border-color: rgba(203, 213, 225, 0.2);
}

/* Accordion modo claro */
[data-theme="light"] .sample-accordion {
  border-top-color: #E2E8F0;
}

/* Zoom hint btn modo claro */
[data-theme="light"] .zoom-hint-btn {
  background: rgba(255, 255, 255, 0.92);
  border-color: #CBD5E1;
  color: #334155;
}

/* Theme toggle y mobile btn modo claro */
[data-theme="light"] .theme-toggle-btn,
[data-theme="light"] .mobile-toggle-btn {
  background: #FFFFFF;
  border-color: #CBD5E1;
  color: #64748B;
}

[data-theme="light"] .theme-toggle-btn:hover,
[data-theme="light"] .mobile-toggle-btn:hover {
  color: var(--unrn-red);
  border-color: rgba(227, 28, 61, 0.35);
  box-shadow: 0 0 10px rgba(227, 28, 61, 0.12);
}

/* Btn secondary modo claro */
[data-theme="light"] .btn-secondary {
  color: #1E293B !important;
  border-color: #CBD5E1;
}

[data-theme="light"] .btn-secondary:hover {
  background: rgba(227, 28, 61, 0.06);
  border-color: rgba(227, 28, 61, 0.30);
  color: var(--unrn-red) !important;
}

/* Flip instruction pill modo claro */
[data-theme="light"] .flip-instruction-pill {
  background: rgba(255, 255, 255, 0.95);
  border-color: rgba(227, 28, 61, 0.25);
  color: var(--unrn-red);
}

/* ==========================================================================
   RESET & BASE
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--background);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  background-image:
    radial-gradient(circle at 15% 10%, rgba(227, 28, 61, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 85% 30%, rgba(200, 16, 46, 0.05) 0%, transparent 45%),
    radial-gradient(circle at 50% 80%, rgba(51, 65, 85, 0.15) 0%, transparent 50%);
  background-attachment: fixed;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

.container {
  width: 100%;
  max-width: 1340px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   BARRA DE NAVEGACIÓN FIJA & HEADER UNRN
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(15, 23, 42, 0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: all var(--transition-normal);
}

.site-header.scrolled {
  background: var(--slate-900);
  border-bottom: 1px solid var(--slate-700);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  position: relative;
}

.brand-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.brand-logo-unrn {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: #ffffff;
  border-radius: 10px;
  padding: 4px;
  box-shadow: 0 2px 10px rgba(227, 28, 61, 0.20);
}

.unrn-logo-img {
  display: block;
  width: 44px;
  height: 44px;
  object-fit: contain;
  border-radius: 6px;
}

.brand-divider {
  width: 1px;
  height: 32px;
  background-color: var(--border);
  margin: 0 16px;
  flex-shrink: 0;
}

.brand-title {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.brand-title .main-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  color: var(--text);
  line-height: 1.2;
}

.brand-title .sub-name {
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--unrn-red);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-top: 2px;
}

/* Menú de navegación */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-link {
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link:hover, .nav-link.active {
  color: var(--unrn-white);
  background: rgba(227, 28, 61, 0.15);
}

.nav-link.active {
  color: var(--unrn-red);
  font-weight: 600;
  border-bottom: 2px solid var(--unrn-red);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.theme-toggle-btn, .mobile-toggle-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  border: 1px solid var(--border);
  background: var(--surface);
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover, .mobile-toggle-btn:hover {
  color: var(--unrn-red);
  border-color: rgba(227, 28, 61, 0.45);
  box-shadow: 0 0 10px rgba(227, 28, 61, 0.20);
}

/* Menú hamburguesa desplegable */
.mobile-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-menu {
  display: none;
  position: absolute;
  top: calc(var(--header-height) - 1px);
  right: 0;
  width: 280px;
  background: rgba(15, 23, 42, 0.99);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--border);
  border-radius: 0 0 16px 16px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.7), 0 0 20px rgba(227, 28, 61, 0.12);
  padding: 16px;
  list-style: none;
  flex-direction: column;
  gap: 8px;
  z-index: 2000;
}

.nav-menu.open {
  display: flex;
}

.nav-menu li {
  width: 100%;
}

.nav-link {
  display: block;
  width: 100%;
  padding: 12px 16px;
  border-radius: 8px;
  color: var(--text);
  text-decoration: none;
  transition: all 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
  background: rgba(227, 28, 61, 0.12);
  color: var(--unrn-red);
}

/* ==========================================================================
   HERO SECTION: PORTADA CIENTÍFICA UNRN
   ========================================================================== */
.hero-section {
  padding-top: calc(var(--header-height) + 48px);
  padding-bottom: 64px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
}

.hero-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(227, 28, 61, 0.12);
  border: 1px solid rgba(227, 28, 61, 0.30);
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--unrn-red);
  margin-bottom: 20px;
}

.hero-badge-pill .pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--unrn-red);
  box-shadow: 0 0 10px var(--unrn-red);
  animation: pulseAnimation 2s infinite;
}

@keyframes pulseAnimation {
  0%   { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(227, 28, 61, 0.7); }
  70%  { transform: scale(1);    box-shadow: 0 0 0 8px rgba(227, 28, 61, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(227, 28, 61, 0); }
}

.hero-title {
  font-family: var(--font-display);
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #F1F5F9 0%, #CBD5E1 40%, #E31C3D 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: var(--text); /* fallback */
}

.hero-title .hero-title-sub {
  display: block;
  font-size: 1.6rem;
  font-weight: 700;
  margin-top: 8px;
  /* No rojo aquí: es nivel 2 de la jerarquía */
  -webkit-text-fill-color: var(--text-muted);
  color: var(--text-muted);
}

.hero-title .gradient-text {
  color: var(--unrn-red);
}

.hero-lead {
  font-size: 1.125rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 620px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 40px;
}

/* Botones UNRN */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  background-color: var(--unrn-red);
  color: var(--unrn-white) !important;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-md);
  box-shadow: 0 6px 18px rgba(227, 28, 61, 0.30);
  transition: all var(--transition-normal);
  border: 1px solid var(--unrn-red);
}

.btn-primary:hover {
  transform: translateY(-2px);
  background-color: var(--unrn-red-dark);
  border-color: var(--unrn-red-dark);
  box-shadow: 0 10px 26px rgba(200, 16, 46, 0.40);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  background: transparent;
  color: var(--text) !important;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
}

.btn-secondary:hover {
  background: rgba(227, 28, 61, 0.10);
  border-color: rgba(227, 28, 61, 0.40);
  color: var(--unrn-red) !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(227, 28, 61, 0.15);
}

/* Carrusel Hero */
.hero-visual-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.hero-visual-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--unrn-red), var(--unrn-red-light), var(--stone-400));
}

.hero-carousel-container {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 11;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
}

.hero-carousel-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.8s ease-in-out, visibility 0.8s ease-in-out;
  cursor: pointer;
}

.hero-carousel-slide.active {
  opacity: 1;
  visibility: visible;
}

.hero-carousel-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.hero-carousel-slide:hover img {
  transform: scale(1.05);
}

.hero-carousel-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 20px 24px;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.92) 0%, rgba(0, 0, 0, 0.55) 60%, transparent 100%);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.hero-carousel-name {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: #ffffff;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.8);
}

.hero-carousel-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 14px;
}

.hero-carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.hero-carousel-dot.active {
  background: var(--unrn-red);
  transform: scale(1.25);
  box-shadow: 0 0 8px var(--unrn-red);
}

/* ==========================================================================
   SECCIONES GENERALES & DIAGRAMAS
   ========================================================================== */
.section {
  padding: 72px 0;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 48px auto;
}

/* section-tag: acento correcto → rojo (identificador de sección) */
.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--unrn-red);
  margin-bottom: 12px;
}

/* section-title: JERARQUÍA → texto principal, NO rojo */
.section-title {
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);              /* ← cambio clave: de rojo a texto */
  margin-bottom: 16px;
}

.section-description {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.qap-images, .piroclastico-img, .sl-lc-images {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
  justify-items: center;
}

@media (min-width: 768px) {
  .qap-images { grid-template-columns: repeat(2, 1fr); }
}

/* Wrapper de altura uniforme para imágenes QAP — evita deformación */
.qap-img-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 360px;           /* altura fija igual para ambas */
  width: 100%;
  overflow: hidden;
  border-radius: var(--radius-sm);
  background-color: #F8FAFC;
  border: 1px solid var(--border);
  padding: 8px;
}

.qap-img-wrapper img.responsive-img {
  width: 100%;
  height: 100%;
  object-fit: contain;     /* escala la imagen completa dentro del wrapper SIN recortarla */
  max-width: 100%;
  border: none;            /* el borde ya está en el wrapper */
  border-radius: 0;
  background: transparent;
}

img.responsive-img {
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: contain;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

/* Diagramas — fondo claro siempre para correcta visibilidad */
#clasificacion .qap-images img,
#clasificacion .piroclastico-img img,
#clasificacion img.responsive-img {
  background-color: #F8FAFC !important;
  padding: 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

#clasificacion .qap-images,
#clasificacion .piroclastico-img {
  background-color: var(--surface);
  border-radius: var(--radius-sm);
  padding: 8px;
  border: 1px solid var(--border);
}

/* ==========================================================================
   EXPLORADOR DE MUESTRAS & FILTROS
   ========================================================================== */
.explorer-controls {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 36px;
  box-shadow: var(--shadow-md);
}

.filter-category-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.category-tab-btn {
  padding: 10px 20px;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--bg-secondary);
  color: var(--text-muted);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition-fast);
}

.category-tab-btn .tab-count {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: rgba(148, 163, 184, 0.15);
  color: var(--text-muted);
}

.category-tab-btn:hover {
  color: var(--unrn-red);
  background: var(--unrn-red-subtle);
  border-color: rgba(227, 28, 61, 0.35);
}

.category-tab-btn.active {
  background: var(--unrn-red);
  border-color: var(--unrn-red);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(227, 28, 61, 0.30);
}

.category-tab-btn.active .tab-count {
  background: rgba(255, 255, 255, 0.25);
  color: #ffffff;
  font-weight: 700;
}

.filter-toolbar {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr auto auto;
  gap: 14px;
  align-items: center;
}

.search-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 14px;
  color: var(--text-faint);    /* ← ya no rojo, es ícono funcional */
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 12px 16px 12px 42px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text);
  font-size: 0.9rem;
  outline: none;
  transition: all var(--transition-fast);
}

.search-input::placeholder {
  color: var(--text-faint);
}

.search-input:focus {
  border-color: var(--unrn-red);
  box-shadow: 0 0 0 3px rgba(227, 28, 61, 0.15);
}

.filter-select {
  padding: 12px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text);
  font-size: 0.88rem;
  outline: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  appearance: auto;
}

.filter-select:focus {
  border-color: var(--unrn-red);
  box-shadow: 0 0 0 3px rgba(227, 28, 61, 0.15);
}

.view-mode-toggle {
  display: flex;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 3px;
}

.view-mode-btn {
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.view-mode-btn.active {
  background: var(--unrn-red);
  color: #ffffff;
}

.btn-reset-filters {
  padding: 10px 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  transition: all var(--transition-fast);
}

.btn-reset-filters:hover {
  color: var(--unrn-red);
  border-color: rgba(227, 28, 61, 0.35);
  background: var(--unrn-red-subtle);
}

/* ==========================================================================
   GRID DE MUESTRAS & TARJETAS DE PIEDRAS (CARDS)
   ========================================================================== */
.samples-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: 28px;
}

.sample-card {
  background: var(--surface);
  border: 1px solid var(--border);      /* ← neutro, no rojo */
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  position: relative;
}

.sample-card:hover {
  transform: translateY(-5px);
  border-color: rgba(227, 28, 61, 0.35);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(227, 28, 61, 0.15);
}

/* Image Container */
.sample-image-container {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  background: var(--slate-950);
  overflow: hidden;
  cursor: pointer;
  border-bottom: 1px solid var(--border);
}

.sample-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.sample-image-container:hover .sample-image {
  transform: scale(1.05);
}

.sample-image-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.08) 0%, rgba(0, 0, 0, 0.78) 100%);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  padding: 16px;
  opacity: 0.95;
  transition: opacity var(--transition-fast);
}

.sample-image-container:hover .sample-image-overlay {
  opacity: 1;
}

.sample-category-badge {
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.sample-category-badge.maficas {
  background: var(--badge-maficas-bg);
  border: 1px solid var(--badge-maficas-border);
  color: var(--badge-maficas-text);
}

.sample-category-badge.felsicas {
  background: var(--badge-felsicas-bg);
  border: 1px solid var(--badge-felsicas-border);
  color: var(--badge-felsicas-text);
}

.sample-category-badge.piroclasticas {
  background: var(--badge-piroclasticas-bg);
  border: 1px solid var(--badge-piroclasticas-border);
  color: var(--badge-piroclasticas-text);
}

.zoom-hint-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: rgba(15, 23, 42, 0.80);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--slate-300);
  transition: all var(--transition-fast);
}

.zoom-hint-btn:hover {
  background: var(--unrn-red);
  color: #ffffff;
  border-color: var(--unrn-red);
  box-shadow: 0 0 12px rgba(227, 28, 61, 0.45);
}

/* Cuerpo de la Tarjeta */
.sample-card-body {
  padding: 22px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.sample-header-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 6px;
}

.sample-name {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text);
}

/* sample-classification: nivel 2 → pardo/muted, no rojo */
.sample-classification {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-style: italic;
  color: var(--accent-stone);      /* ← stone, no rojo */
  margin-bottom: 12px;
}

.sample-location-row {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--text-faint);
  margin-bottom: 16px;
}

.sample-meta-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-bottom: 18px;
  padding: 12px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.meta-field .meta-label {
  font-size: 0.72rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  display: block;
}

.meta-field .meta-val {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
}

/* Minerales Chips */
.sample-minerals-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 18px;
}

.mineral-chip {
  padding: 3px 8px;
  font-size: 0.75rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
}

.mineral-chip.highlight {
  border-color: rgba(227, 28, 61, 0.35);
  color: var(--unrn-red);
  background: var(--unrn-red-subtle);
  font-weight: 600;
}

/* Acordeón de Descripción */
.sample-accordion {
  border-top: 1px solid var(--border);
  padding-top: 14px;
  margin-top: auto;
}

.accordion-trigger-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
  padding: 8px 0;
  transition: color var(--transition-fast);
}

.accordion-trigger-btn:hover {
  color: var(--unrn-red);
}

.accordion-icon {
  transition: transform var(--transition-normal);
  color: var(--text-muted);       /* ← neutro, no rojo */
}

.sample-accordion.open .accordion-icon {
  transform: rotate(180deg);
  color: var(--unrn-red);         /* rojo solo cuando está activo */
}

.accordion-content {
  display: none;
  padding: 12px 0 6px 0;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.sample-accordion.open .accordion-content {
  display: block;
}

.epigraph-box {
  margin-top: 12px;
  padding: 12px;
  background: rgba(227, 28, 61, 0.06);
  border-left: 3px solid var(--unrn-red);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.epigraph-box strong {
  color: var(--unrn-red-light);
}

/* ==========================================================================
   VISTA FLIP CARDS 3D
   ========================================================================== */
.flip-cards-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 28px;
  perspective: 1200px;
}

.flip-card-wrapper {
  background: transparent;
  height: 480px;
}

.flip-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  text-align: left;
  transition: transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
  transform-style: preserve-3d;
  cursor: pointer;
}

.flip-card-wrapper.flipped .flip-card-inner {
  transform: rotateY(180deg);
}

.flip-card-front, .flip-card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);    /* ← neutro, no rojo */
  overflow: hidden;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.flip-card-front:hover,
.flip-card-back:hover {
  border-color: rgba(227, 28, 61, 0.30);
}

.flip-card-front {
  background: var(--surface);
}

.flip-card-back {
  background: var(--surface-2);
  transform: rotateY(180deg);
  padding: 24px;
  overflow-y: auto;
  box-shadow: 0 0 18px rgba(227, 28, 61, 0.15);
}

.flip-instruction-pill {
  position: absolute;
  bottom: 12px;
  right: 12px;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(8px);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  color: var(--unrn-red);
  display: flex;
  align-items: center;
  gap: 6px;
  z-index: 5;
  border: 1px solid rgba(227, 28, 61, 0.30);
}

/* ==========================================================================
   COMPARADOR PETROGRÁFICO INTERACTIVO
   ========================================================================== */
.comparator-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-lg);
}

.comparator-selectors {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 24px;
  align-items: center;
  margin-bottom: 32px;
}

/* VS badge: acento rojo correcto (elemento de interfaz clave) */
.comparator-vs-badge {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--unrn-red);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.9rem;
  color: #ffffff;
  box-shadow: 0 0 14px rgba(227, 28, 61, 0.40);
}

.comparator-select-panel label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-faint);
  text-transform: uppercase;
  margin-bottom: 8px;
  letter-spacing: 0.04em;
}

.comparator-display-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.comparison-column {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.comparison-column h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--text);
  margin-bottom: 4px;
}

.comparison-column .comp-class {
  font-style: italic;
  color: var(--accent-stone);     /* ← stone, no rojo */
  margin-bottom: 16px;
}

.comp-thumb {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  border: 1px solid var(--border); /* ← neutro, no rojo */
  cursor: pointer;
  transition: transform 0.3s ease, border-color 0.2s ease;
}

.comp-thumb:hover {
  transform: scale(1.02);
  border-color: rgba(227, 28, 61, 0.35);
  box-shadow: 0 0 14px rgba(227, 28, 61, 0.25);
}

.comp-spec-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
}

.comp-spec-row .spec-label {
  color: var(--text-faint);
  font-weight: 500;
}

.comp-spec-row .spec-value {
  color: var(--text);
  font-weight: 600;
  text-align: right;
}

/* ==========================================================================
   GLOSARIO & ABREVIATURAS WHITNEY & EVANS (2010)
   ========================================================================== */
.glossary-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.glossary-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-md);
}

.glossary-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

/* Título del panel: texto principal, no blanco hardcodeado */
.glossary-panel-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);             /* ← usa la variable, no hardcode */
}

.glossary-search-box {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.85rem;
  margin-bottom: 16px;
  outline: none;
}

.glossary-search-box::placeholder {
  color: var(--text-faint);
}

.glossary-search-box:focus {
  border-color: var(--unrn-red);
  box-shadow: 0 0 0 2px rgba(227, 28, 61, 0.15);
}

.abbreviations-table-wrap {
  max-height: 420px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.custom-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.custom-table th {
  position: sticky;
  top: 0;
  background: var(--surface-2);
  padding: 10px 14px;
  text-align: left;
  font-weight: 600;
  color: var(--text);             /* ← texto principal, no rojo */
  border-bottom: 2px solid var(--border);
  z-index: 2;
}

.custom-table td {
  padding: 10px 14px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}

.custom-table tr:last-child td {
  border-bottom: none;
}

.custom-table tr:hover td {
  background: rgba(227, 28, 61, 0.05);
  color: var(--text);
}

.code-badge {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--unrn-red);
  background: var(--unrn-red-subtle);
  border: 1px solid rgba(227, 28, 61, 0.30);
  padding: 2px 6px;
  border-radius: 4px;
}

/* ==========================================================================
   CALENDARIO ACADÉMICO
   ========================================================================== */
.calendar-wrapper {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-lg);
}

.calendar-iframe-box {
  position: relative;
  width: 100%;
  height: 580px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
  background: #ffffff;
}

.calendar-iframe-box iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

/* ==========================================================================
   EQUIPO DOCENTE, AYUDANTES Y CONTACTOS
   ========================================================================== */
.team-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  align-items: stretch;
}

.team-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px 14px;
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.team-card:hover {
  transform: translateY(-4px);
  border-color: rgba(227, 28, 61, 0.30);
  box-shadow: var(--shadow-lg);
}

.team-avatar-box {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--bg-secondary);
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 14px;
  transition: border-color var(--transition-fast);
}

.team-card:hover .team-avatar-box {
  border-color: rgba(227, 28, 61, 0.40);
}

.team-name {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
  line-height: 1.25;
}

/* team-role: nivel 2 → muted, no rojo */
.team-role {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-faint);       /* ← neutro, no rojo */
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 14px;
}

.team-mail-btn {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 6px 8px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-size: 0.74rem;
  color: var(--text-muted);
  transition: all var(--transition-fast);
  word-break: break-all;
  width: 100%;
}

.team-mail-btn:hover {
  background: var(--unrn-red-subtle);
  color: var(--unrn-red);
  border-color: rgba(227, 28, 61, 0.30);
}

/* ==========================================================================
   RECURSOS COMPLEMENTARIOS Y BIBLIOGRAFÍA
   ========================================================================== */
.resources-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.resource-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.resource-card:hover {
  transform: translateY(-4px);
  border-color: rgba(227, 28, 61, 0.30);
  box-shadow: var(--shadow-lg);
}

.resource-icon-box {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--unrn-red-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 16px;
  color: var(--unrn-red);
}

.resource-name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}

.resource-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  flex-grow: 1;
}

.resource-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--unrn-red);
  transition: gap var(--transition-fast), color var(--transition-fast);
}

.resource-link-btn:hover {
  color: var(--unrn-red-light);
  gap: 12px;
}

/* ==========================================================================
   MODAL / LIGHTBOX DE ALTA RESOLUCIÓN (FOTOMICROGRAFÍAS)
   ========================================================================== */
.lightbox-modal {
  position: fixed;
  inset: 0;
  background: rgba(8, 12, 22, 0.98);
  backdrop-filter: blur(20px);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.lightbox-modal.active {
  display: flex;
  animation: fadeIn 0.25s ease forwards;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.lightbox-content-box {
  width: 95vw;
  max-width: 1400px;
  height: 92vh;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow-y: auto;
  display: grid;
  grid-template-columns: 1.4fr 0.9fr;
  box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.95);
}

.lightbox-img-area {
  position: relative;
  background: var(--slate-950);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  overflow: auto;
  border-right: 1px solid var(--border);
}

.lightbox-main-img {
  width: 100%;
  height: auto;
  max-height: 88vh;
  object-fit: contain;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.7);
}

.lightbox-controls {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  background: rgba(15, 23, 42, 0.92);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
}

.lightbox-ctrl-btn {
  color: var(--text-muted);
  padding: 6px;
  font-size: 1rem;
  border-radius: 50%;
  transition: all var(--transition-fast);
}

.lightbox-ctrl-btn:hover {
  color: var(--unrn-red);
  transform: scale(1.1);
}

.lightbox-sidebar {
  padding: 32px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.lightbox-close-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  z-index: 10;
  transition: all var(--transition-fast);
}

.lightbox-close-btn:hover {
  background: var(--unrn-red);
  color: #ffffff;
  box-shadow: 0 0 12px rgba(227, 28, 61, 0.50);
}

/* lightbox-title: texto principal, no rojo */
.lightbox-title {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text);             /* ← texto, no rojo */
  margin-bottom: 6px;
}

.lightbox-caption-text {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
  background: var(--bg-secondary);
  padding: 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  border-left: 4px solid var(--unrn-red);
}

/* ==========================================================================
   FOOTER INSTITUCIONAL
   ========================================================================== */
.site-footer {
  background: var(--slate-950);
  border-top: 1px solid var(--border);
  padding: 64px 0 32px 0;
  color: var(--text-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-col h4 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);             /* ← usa variable, no hardcode */
  margin-bottom: 18px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.88rem;
}

.footer-links a {
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--unrn-red);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-faint);
}

/* ==========================================================================
   RESPONSIVE DESIGN
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .hero-visual-card {
    max-width: 600px;
    margin: 0 auto;
  }

  .filter-toolbar {
    grid-template-columns: 1fr 1fr;
  }

  .comparator-selectors {
    grid-template-columns: 1fr;
  }

  .comparator-vs-badge {
    margin: 0 auto;
  }

  .comparator-display-grid {
    grid-template-columns: 1fr;
  }

  .glossary-layout {
    grid-template-columns: 1fr;
  }

  .team-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

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

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.2rem;
  }

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

  .filter-toolbar {
    grid-template-columns: 1fr;
  }

  .team-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }

  .lightbox-content-box {
    grid-template-columns: 1fr;
    max-height: 96vh;
    overflow-y: auto;
  }

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

  .brand-title .main-name {
    font-size: 0.9rem;
  }

  .brand-title .sub-name {
    font-size: 0.7rem;
  }
}

@media (max-width: 480px) {
  .team-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }
}

/* ==========================================================================
   CRÉDITO TUWEB_SMA
   ========================================================================== */
.footer-credit {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  color: var(--text-faint);
  flex-wrap: wrap;
  justify-content: flex-end;
}

.footer-credit-link {
  color: var(--text-faint);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--transition-fast);
}

.footer-credit-link:hover {
  color: var(--unrn-red);
}

.footer-instagram {
  display: inline-flex;
  align-items: center;
  gap: 3px;
}

.footer-instagram:hover {
  color: var(--unrn-red);
}

@media (max-width: 768px) {
  .footer-credit {
    justify-content: center;
    margin-top: 8px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 8px;
  }
}