/* ============================================
   FarDU Scientific Bulletin
   Unified Design System v2.0
   Journal Portal Aesthetic
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=Lora:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');

/* ══════════════════════════════════════════════
   DESIGN TOKENS
   ══════════════════════════════════════════════ */
:root {
  /* ── Base Palette (Warm Academic) ─────────── */
  --cream-50:  #fffbf5;
  --cream-100: #faf6ef;
  --cream-200: #f5efe5;
  --cream-300: #ede5d8;
  --cream-400: #e2d8c8;
  --cream-500: #d4c7b4;
  
  --stone-50:  #fafaf9;
  --stone-100: #f5f5f4;
  --stone-200: #e7e5e4;
  --stone-300: #d6d3d1;
  --stone-400: #a8a29e;
  --stone-500: #78716c;
  --stone-600: #57534e;
  --stone-700: #44403c;
  --stone-800: #292524;
  --stone-900: #1c1917;
  
  --ink-50:  #f8fafc;
  --ink-100: #f1f5f9;
  --ink-200: #e2e8f0;
  --ink-300: #cbd5e1;
  --ink-400: #94a3b8;
  --ink-500: #64748b;
  --ink-600: #475569;
  --ink-700: #334155;
  --ink-800: #1e293b;
  --ink-900: #0f172a;
  --ink-950: #020617;

  /* ── Journal Color Schemes ───────────────── */
  /* Physics - Teal/Blue */
  --physics-50:  #f0fdfa;
  --physics-100: #ccfbf1;
  --physics-200: #99f6e4;
  --physics-300: #5eead4;
  --physics-400: #2dd4bf;
  --physics-500: #14b8a6;
  --physics-600: #0d9488;
  --physics-700: #0f766e;
  --physics-800: #115e59;
  --physics-900: #134e4a;
  
  /* Biology - Green */
  --biology-50:  #f0fdf4;
  --biology-100: #dcfce7;
  --biology-200: #bbf7d0;
  --biology-300: #86efac;
  --biology-400: #4ade80;
  --biology-500: #22c55e;
  --biology-600: #16a34a;
  --biology-700: #15803d;
  --biology-800: #166534;
  --biology-900: #14532d;
  
  /* Mathematics - Indigo/Purple */
  --mathematics-50:  #eef2ff;
  --mathematics-100: #e0e7ff;
  --mathematics-200: #c7d2fe;
  --mathematics-300: #a5b4fc;
  --mathematics-400: #818cf8;
  --mathematics-500: #6366f1;
  --mathematics-600: #4f46e5;
  --mathematics-700: #4338ca;
  --mathematics-800: #3730a3;
  --mathematics-900: #312e81;
  
  /* Pedagogy & Philology - Amber/Orange */
  --pedagogy-50:  #fffbeb;
  --pedagogy-100: #fef3c7;
  --pedagogy-200: #fde68a;
  --pedagogy-300: #fcd34d;
  --pedagogy-400: #fbbf24;
  --pedagogy-500: #f59e0b;
  --pedagogy-600: #d97706;
  --pedagogy-700: #b45309;
  --pedagogy-800: #92400e;
  --pedagogy-900: #78350f;

  /* ── Default Theme (Physics) ─────────────── */
  --accent-50:  var(--physics-50);
  --accent-100: var(--physics-100);
  --accent-200: var(--physics-200);
  --accent-300: var(--physics-300);
  --accent-400: var(--physics-400);
  --accent-500: var(--physics-500);
  --accent-600: var(--physics-600);
  --accent-700: var(--physics-700);
  --accent-800: var(--physics-800);
  --accent-900: var(--physics-900);
  
  /* ── Semantic Colors ─────────────────────── */
  --primary:       var(--ink-900);
  --primary-soft:  var(--ink-800);
  --secondary:     #b98a47;
  --secondary-soft: rgba(185, 138, 71, 0.14);
  
  --text-primary:   var(--ink-900);
  --text-secondary: var(--ink-600);
  --text-muted:     var(--ink-500);
  --text-caption:   var(--ink-400);
  --text-inverse:   var(--cream-50);
  
  --bg-body:     linear-gradient(180deg, #fcfaf6 0%, #f6f0e8 56%, #efe6dc 100%);
  --bg-surface:  rgba(255, 251, 245, 0.78);
  --bg-elevated: rgba(255, 255, 255, 0.92);
  --bg-card:     rgba(255, 250, 244, 0.84);
  --bg-dark:     var(--ink-900);
  --bg-darker:   var(--ink-950);
  
  --border:       rgba(86, 71, 53, 0.12);
  --border-light: rgba(86, 71, 53, 0.08);
  --border-dark:  rgba(255, 255, 255, 0.12);
  
  --success: #16a34a;
  --warning: #d97706;
  --danger:  #dc2626;
  --info:    var(--accent-600);

  /* ── Typography ──────────────────────────── */
  --font-serif: 'Lora', Georgia, 'Times New Roman', serif;
  --font-sans:  'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', sans-serif;
  --font-mono:  'IBM Plex Mono', 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
  
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  2rem;
  --text-4xl:  2.5rem;
  --text-5xl:  3rem;
  
  --leading-none:    1;
  --leading-tight:   1.25;
  --leading-snug:    1.375;
  --leading-normal:  1.5;
  --leading-relaxed: 1.625;
  --leading-loose:   2;
  
  --tracking-tighter: -0.05em;
  --tracking-tight:   -0.025em;
  --tracking-normal:  0;
  --tracking-wide:    0.025em;
  --tracking-wider:   0.05em;
  --tracking-widest:  0.1em;

  /* ── Spacing ─────────────────────────────── */
  --sp-0:  0;
  --sp-1:  0.25rem;
  --sp-2:  0.5rem;
  --sp-3:  0.75rem;
  --sp-4:  1rem;
  --sp-5:  1.25rem;
  --sp-6:  1.5rem;
  --sp-8:  2rem;
  --sp-10: 2.5rem;
  --sp-12: 3rem;
  --sp-16: 4rem;
  --sp-20: 5rem;
  --sp-24: 6rem;
  --sp-32: 8rem;

  /* ── Layout ──────────────────────────────── */
  --container-sm:   640px;
  --container-md:   768px;
  --container-lg:   1024px;
  --container-xl:   1280px;
  --container-2xl:  1440px;
  --container-max:  var(--container-xl);

  /* ── Surfaces ────────────────────────────── */
  --radius-sm:  0.5rem;
  --radius-md:  0.75rem;
  --radius-lg:  1rem;
  --radius-xl:  1.5rem;
  --radius-2xl: 2rem;
  --radius-full: 9999px;
  
  --shadow-xs:  0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm:  0 4px 12px rgba(55, 39, 20, 0.08);
  --shadow-md:  0 8px 24px rgba(55, 39, 20, 0.1);
  --shadow-lg:  0 16px 40px rgba(55, 39, 20, 0.12);
  --shadow-xl:  0 24px 60px rgba(55, 39, 20, 0.14);
  --shadow-2xl: 0 32px 80px rgba(55, 39, 20, 0.16);
  
  --glass-bg: rgba(255, 251, 245, 0.78);
  --glass-border: rgba(134, 111, 82, 0.15);
  --glass-shadow: 0 24px 80px rgba(55, 39, 20, 0.14);
  --glass-blur: blur(20px);

  /* ── Motion ──────────────────────────────── */
  --ease-out:    cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast:   150ms;
  --duration-normal: 250ms;
  --duration-slow:   400ms;
}

/* ── Journal Theme Variants ─────────────────── */
[data-journal="physics"],
body:not([data-journal]) {
  --accent-50:  var(--physics-50);
  --accent-100: var(--physics-100);
  --accent-200: var(--physics-200);
  --accent-300: var(--physics-300);
  --accent-400: var(--physics-400);
  --accent-500: var(--physics-500);
  --accent-600: var(--physics-600);
  --accent-700: var(--physics-700);
  --accent-800: var(--physics-800);
  --accent-900: var(--physics-900);
  --accent-rgb: 20, 184, 166;
  --journal-glow: radial-gradient(circle at top right, rgba(20, 184, 166, 0.15), transparent 40%);
}

[data-journal="biology"] {
  --accent-50:  var(--biology-50);
  --accent-100: var(--biology-100);
  --accent-200: var(--biology-200);
  --accent-300: var(--biology-300);
  --accent-400: var(--biology-400);
  --accent-500: var(--biology-500);
  --accent-600: var(--biology-600);
  --accent-700: var(--biology-700);
  --accent-800: var(--biology-800);
  --accent-900: var(--biology-900);
  --accent-rgb: 34, 197, 94;
  --journal-glow: radial-gradient(circle at top right, rgba(34, 197, 94, 0.15), transparent 40%);
}

[data-journal="mathematics"] {
  --accent-50:  var(--mathematics-50);
  --accent-100: var(--mathematics-100);
  --accent-200: var(--mathematics-200);
  --accent-300: var(--mathematics-300);
  --accent-400: var(--mathematics-400);
  --accent-500: var(--mathematics-500);
  --accent-600: var(--mathematics-600);
  --accent-700: var(--mathematics-700);
  --accent-800: var(--mathematics-800);
  --accent-900: var(--mathematics-900);
  --accent-rgb: 99, 102, 241;
  --journal-glow: radial-gradient(circle at top right, rgba(99, 102, 241, 0.15), transparent 40%);
}

[data-journal="pedagogy"] {
  --accent-50:  var(--pedagogy-50);
  --accent-100: var(--pedagogy-100);
  --accent-200: var(--pedagogy-200);
  --accent-300: var(--pedagogy-300);
  --accent-400: var(--pedagogy-400);
  --accent-500: var(--pedagogy-500);
  --accent-600: var(--pedagogy-600);
  --accent-700: var(--pedagogy-700);
  --accent-800: var(--pedagogy-800);
  --accent-900: var(--pedagogy-900);
  --accent-rgb: 245, 158, 11;
  --journal-glow: radial-gradient(circle at top right, rgba(245, 158, 11, 0.15), transparent 40%);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: 5rem;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--text-primary);
  line-height: var(--leading-normal);
  background: var(--bg-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  min-height: 100vh;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: 
    var(--journal-glow, radial-gradient(circle at top right, rgba(20, 184, 166, 0.12), transparent 40%)),
    radial-gradient(circle at bottom left, rgba(185, 138, 71, 0.1), transparent 40%);
  z-index: -1;
}

a {
  color: var(--accent-600);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

a:hover {
  color: var(--accent-700);
  text-decoration: underline;
}

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

ul, ol { list-style: none; }

button, input, select, textarea {
  font: inherit;
  min-width: 0;
}

button {
  cursor: pointer;
  background: none;
  border: none;
}

input, select, textarea {
  max-width: 100%;
}

/* ══════════════════════════════════════════════
   TYPOGRAPHY
   ══════════════════════════════════════════════ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  color: var(--text-primary);
  line-height: var(--leading-tight);
  font-weight: 600;
  letter-spacing: var(--tracking-tight);
}

h1 { font-size: clamp(2rem, 5vw, var(--text-5xl)); }
h2 { font-size: clamp(1.5rem, 4vw, var(--text-3xl)); }
h3 { font-size: clamp(1.25rem, 3vw, var(--text-2xl)); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p { margin-bottom: var(--sp-4); }
p:last-child { margin-bottom: 0; }

.label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--accent-600);
}

.prose {
  line-height: var(--leading-relaxed);
  color: var(--text-secondary);
}
.prose p { margin-bottom: var(--sp-6); }
.prose h2, .prose h3, .prose h4 { 
  color: var(--text-primary); 
  margin: var(--sp-8) 0 var(--sp-4); 
}
.prose ul, .prose ol { 
  padding-left: var(--sp-6); 
  margin-bottom: var(--sp-6); 
}
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin-bottom: var(--sp-2); }
.prose a { text-decoration: underline; }
.prose strong { color: var(--text-primary); }

.text-center { text-align: center; }
.text-sm { font-size: var(--text-sm); }
.text-xs { font-size: var(--text-xs); }
.text-muted { color: var(--text-muted); }

/* ══════════════════════════════════════════════
   LAYOUT
   ══════════════════════════════════════════════ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--sp-6);
}

.container--sm { max-width: var(--container-sm); }
.container--md { max-width: var(--container-md); }
.container--lg { max-width: var(--container-lg); }
.container--xl { max-width: var(--container-xl); }
.container--2xl { max-width: var(--container-2xl); }

.section { padding: var(--sp-20) 0; }
.section--sm { padding: var(--sp-12) 0; }
.section--lg { padding: var(--sp-24) 0; }

.grid {
  display: grid;
  gap: var(--sp-6);
}
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.flex { display: flex; align-items: center; }
.flex--between { justify-content: space-between; }
.flex--center { justify-content: center; }
.flex--wrap { flex-wrap: wrap; }
.gap-2 { gap: var(--sp-2); }
.gap-3 { gap: var(--sp-3); }
.gap-4 { gap: var(--sp-4); }
.gap-6 { gap: var(--sp-6); }
.gap-8 { gap: var(--sp-8); }

/* ══════════════════════════════════════════════
   ACCESSIBILITY
   ══════════════════════════════════════════════ */
.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
  background: var(--accent-600);
  color: var(--text-inverse);
  padding: var(--sp-3) var(--sp-6);
  font-weight: 600;
  z-index: 9999;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.skip-link:focus {
  position: fixed;
  left: var(--sp-4);
  top: 0;
  width: auto;
  height: auto;
  overflow: visible;
  text-decoration: none;
}

/* ══════════════════════════════════════════════
   SHELL - Main Page Container
   ══════════════════════════════════════════════ */
.shell {
  width: min(1280px, calc(100% - 2rem));
  margin: var(--sp-4) auto 0;
  padding: var(--sp-4);
  border-radius: var(--radius-2xl);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.7), rgba(252, 247, 239, 0.88));
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  backdrop-filter: var(--glass-blur);
}

/* ══════════════════════════════════════════════
   TOP BAR
   ══════════════════════════════════════════════ */
.top-bar {
  background: rgba(8, 13, 20, 0.96);
  color: rgba(255, 247, 235, 0.9);
  padding: var(--sp-2) 0;
  font-size: var(--text-xs);
}

.top-bar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.top-bar__links {
  display: flex;
  gap: var(--sp-6);
  align-items: center;
}

.top-bar__links a {
  color: rgba(255, 247, 235, 0.9);
  font-weight: 500;
  transition: color var(--duration-fast);
}

.top-bar__links a:hover {
  color: #fff;
  text-decoration: none;
}

.top-bar__issn {
  font-family: var(--font-mono);
  color: rgba(255, 247, 235, 0.84);
  letter-spacing: var(--tracking-widest);
}

/* Language Switcher */
.lang-switcher {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
}

.lang-switcher button {
  min-width: 2.75rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-full);
  color: rgba(255, 247, 235, 0.6);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: var(--tracking-wider);
  transition: all var(--duration-fast);
}

.lang-switcher button:hover {
  color: #fff;
  transform: translateY(-1px);
}

.lang-switcher button.active {
  background: linear-gradient(135deg, var(--accent-600), var(--accent-700));
  color: #fff;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* ══════════════════════════════════════════════
   HEADER
   ══════════════════════════════════════════════ */
.header {
  position: relative;
  overflow: visible;
  padding: clamp(1.5rem, 3vw, 2.4rem);
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at top right, rgba(var(--accent-rgb, 20, 184, 166), 0.12), transparent 24%),
    radial-gradient(circle at left center, rgba(193, 128, 64, 0.14), transparent 28%),
    linear-gradient(140deg, rgba(255, 251, 245, 0.96), rgba(248, 240, 228, 0.94));
  border: 1px solid var(--glass-border);
  margin-bottom: var(--sp-4);
  z-index: 10;
}

.header .container {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2vw, 2.25rem);
  position: relative;
  z-index: 1;
  overflow: visible;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  flex: 0 0 auto;
  max-width: 300px;
  min-width: 0;
  text-decoration: none !important;
}

.logo__icon-img {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  object-fit: contain;
  background: rgba(255, 255, 255, 0.92);
  padding: 5px;
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

.logo__text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.logo__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  margin-bottom: 0.2rem;
  font-family: var(--font-mono);
  font-size: 0.63rem;
  font-weight: 600;
  color: var(--accent-600);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  opacity: 0.85;
  white-space: nowrap;
}

.logo__title {
  font-family: var(--font-serif);
  font-size: clamp(0.95rem, 1vw + 0.6rem, 1.2rem);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.12;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* subtitle completely removed from visual — kept in DOM for SEO */
.logo__subtitle {
  display: none;
}

/* Navigation */
.nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex: 1 1 auto;
  min-width: 0;
  gap: 4px;
  flex-wrap: nowrap;
  overflow: visible;
}

.nav > a,
.nav__dropdown-trigger {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: var(--text-sm);
  padding: var(--sp-2) clamp(0.55rem, 0.8vw, 0.85rem);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast);
  white-space: nowrap;
}

.nav > a:hover,
.nav > a.active,
.nav__dropdown:hover .nav__dropdown-trigger {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.6);
  text-decoration: none;
}

.nav__dropdown {
  position: relative;
  z-index: 20;
}

.nav__dropdown-trigger {
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: default;
}

.nav__dropdown-trigger::after {
  content: '';
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid currentColor;
  transition: transform var(--duration-fast);
}

.nav__dropdown:hover .nav__dropdown-trigger::after {
  transform: rotate(180deg);
}

.nav__dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  min-width: 220px;
  padding: var(--sp-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--duration-normal) var(--ease-out);
  z-index: 1200;
}

.nav__dropdown:hover .nav__dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav__dropdown-menu a {
  display: block;
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.nav__dropdown-menu a:hover {
  background: var(--accent-50);
  color: var(--accent-700);
  text-decoration: none;
}

.nav__search-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  color: var(--text-muted);
}

.nav__search-link:hover {
  color: var(--accent-600);
}

.nav__submit {
  margin-left: var(--sp-2);
  padding: var(--sp-2) var(--sp-4) !important;
  background: linear-gradient(135deg, var(--accent-600), var(--accent-700)) !important;
  color: #fff !important;
  font-weight: 600 !important;
  border-radius: var(--radius-full) !important;
  box-shadow: 0 4px 14px rgba(var(--accent-rgb, 20, 184, 166), 0.3);
  transition: all var(--duration-fast) !important;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav__submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(var(--accent-rgb, 20, 184, 166), 0.4) !important;
  text-decoration: none !important;
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.menu-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--duration-normal);
}

/* ══════════════════════════════════════════════
   PAGE HEADER
   ══════════════════════════════════════════════ */
.page-header {
  padding: var(--sp-12) 0 var(--sp-8);
  background:
    radial-gradient(circle at top right, rgba(var(--accent-rgb, 20, 184, 166), 0.08), transparent 40%),
    radial-gradient(circle at bottom left, rgba(185, 138, 71, 0.06), transparent 40%);
  border-bottom: 1px solid var(--border-light);
  margin-bottom: var(--sp-8);
}

.page-header h1 {
  margin-bottom: var(--sp-3);
}

.page-header p {
  color: var(--text-secondary);
  font-size: var(--text-lg);
  max-width: 600px;
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-bottom: var(--sp-4);
}

.breadcrumb a {
  color: var(--text-muted);
}

.breadcrumb a:hover {
  color: var(--accent-600);
}

.breadcrumb .sep {
  color: var(--text-caption);
}

/* ══════════════════════════════════════════════
   BUTTONS
   ══════════════════════════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: var(--text-sm);
  padding: var(--sp-3) var(--sp-6);
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  text-decoration: none;
  white-space: nowrap;
  line-height: 1.4;
}

.btn:hover { text-decoration: none; }

.btn:focus-visible {
  outline: 2px solid var(--accent-500);
  outline-offset: 2px;
}

.btn--primary {
  background: linear-gradient(135deg, var(--accent-600), var(--accent-700));
  color: #fff;
  border-color: var(--accent-600);
  box-shadow: 0 4px 14px rgba(var(--accent-rgb, 20, 184, 166), 0.25);
}

.btn--primary:hover {
  background: linear-gradient(135deg, var(--accent-700), var(--accent-800));
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(var(--accent-rgb, 20, 184, 166), 0.35);
  color: #fff;
}

.btn--secondary {
  background: rgba(255, 255, 255, 0.8);
  color: var(--text-primary);
  border-color: var(--border);
}

.btn--secondary:hover {
  background: #fff;
  border-color: var(--accent-300);
  color: var(--accent-700);
}

.btn--outline {
  background: transparent;
  color: var(--accent-700);
  border-color: var(--border);
}

.btn--outline:hover {
  background: var(--accent-50);
  border-color: var(--accent-300);
}

.btn--dark {
  background: linear-gradient(135deg, var(--ink-800), var(--ink-900));
  color: #fff;
  border-color: var(--ink-800);
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.2);
}

.btn--dark:hover {
  background: linear-gradient(135deg, var(--ink-700), var(--ink-800));
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(15, 23, 42, 0.3);
  color: #fff;
}

.btn--sm {
  padding: var(--sp-2) var(--sp-4);
  font-size: var(--text-xs);
}

.btn--lg {
  padding: var(--sp-4) var(--sp-8);
  font-size: var(--text-base);
}

/* ══════════════════════════════════════════════
   CARDS
   ══════════════════════════════════════════════ */
.card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--sp-6);
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-normal) var(--ease-out);
}

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

.card--glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border-color: var(--glass-border);
}

/* ══════════════════════════════════════════════
   FOOTER
   ══════════════════════════════════════════════ */
.footer {
  background: var(--bg-dark);
  color: rgba(255, 247, 235, 0.8);
  padding: var(--sp-12) 0 var(--sp-8);
  margin-top: var(--sp-16);
  border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
}

.footer__top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: var(--sp-8);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: var(--sp-8);
}

.footer__social {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
}

.footer__social span {
  font-size: var(--text-sm);
  color: rgba(255, 247, 235, 0.6);
}

.footer__social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 247, 235, 0.8);
  transition: all var(--duration-fast);
}

.footer__social a:hover {
  background: var(--accent-600);
  color: #fff;
  transform: translateY(-2px);
}

.footer__links {
  display: flex;
  gap: var(--sp-6);
}

.footer__links a {
  color: rgba(255, 247, 235, 0.7);
  font-size: var(--text-sm);
  font-weight: 500;
}

.footer__links a:hover {
  color: #fff;
  text-decoration: none;
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-sm);
  color: rgba(255, 247, 235, 0.5);
}

.footer__license {
  font-size: var(--text-xs);
  color: rgba(255, 247, 235, 0.4);
}

/* ══════════════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════════════ */
@media (max-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
}

.mobile-menu-toggle {
  display: none;
}
@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: var(--sp-10);
    height: var(--sp-10);
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--text-primary);
  }
}

@media (max-width: 768px) {
  .shell {
    width: calc(100% - 1rem);
    margin: 0.5rem auto 0;
    padding: var(--sp-3);
  }
  
  .header {
    padding: var(--sp-4);
    border-radius: var(--radius-lg);
  }
  
  .header .container {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: start;
    gap: var(--sp-3);
  }

  .logo {
    flex-basis: auto;
    min-width: 0;
    max-width: 100%;
    grid-column: 1;
    grid-row: 1;
  }

  .logo__text {
    min-width: 0;
  }

  .logo__title {
    font-size: clamp(0.9rem, 5vw, 1.15rem);
    white-space: normal;
  }

  .nav {
    display: none;
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 0;
    right: 0;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--sp-4);
    box-shadow: var(--shadow-lg);
    flex-direction: column;
    align-items: stretch;
    gap: var(--sp-2);
    z-index: 1000;
  }
  
  .nav.active { display: flex; }
  
  .nav > a,
  .nav__dropdown-trigger {
    padding: var(--sp-3) var(--sp-4);
    justify-content: space-between;
  }
  
  .nav__dropdown-menu {
    position: static;
    opacity: 0;
    visibility: hidden;
    max-height: 0;
    overflow: hidden;
    transform: none;
    box-shadow: none;
    border: none;
    background: var(--accent-50);
    margin-top: 0;
    transition: opacity var(--duration-fast), max-height var(--duration-normal) var(--ease-out);
  }

  .nav__dropdown.open .nav__dropdown-menu {
    opacity: 1;
    visibility: visible;
    max-height: 300px;
    margin-top: var(--sp-2);
  }
  
  .nav__submit {
    margin-left: 0;
    margin-top: var(--sp-2);
    text-align: center;
  }
  
  .menu-toggle {
    display: flex;
    grid-column: 2;
    grid-row: 1;
    align-self: center;
    justify-self: end;
    margin-top: var(--sp-1);
  }
  
  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }
  
  .footer__top,
  .footer__bottom {
    flex-direction: column;
    gap: var(--sp-4);
    text-align: center;
  }
  
  .footer__links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .footer {
    padding: var(--sp-10) 0 var(--sp-6);
    margin-top: var(--sp-12);
  }

  body.page--short .footer {
    padding: var(--sp-7) 0 var(--sp-4);
    margin-top: var(--sp-8);
    border-radius: 28px 28px 0 0;
  }

  body.page--short .footer__top {
    padding-bottom: var(--sp-5);
    margin-bottom: var(--sp-5);
    gap: var(--sp-3);
  }

  body.page--short .footer__bottom {
    gap: var(--sp-3);
  }

  body.page--short .footer__links {
    gap: var(--sp-4);
  }
}

@media (max-width: 480px) {
  :root {
    --text-4xl: 2rem;
    --text-5xl: 2.5rem;
  }
  
  .btn--lg {
    padding: var(--sp-3) var(--sp-6);
    font-size: var(--text-sm);
  }
  
.lang-switcher button {
    min-width: 2.25rem;
    padding: 0.4rem 0.5rem;
  }
}

/* ── Editorial Board: Structured Layout ────────────────────────────────── */
.editorial-board-shell {
  position: relative;
  overflow: hidden;
  padding: clamp(1.4rem, 3vw, 2.2rem);
  border: 1px solid var(--border);
  border-radius: 24px;
  background:
    radial-gradient(circle at 100% 0, rgba(var(--accent-rgb), 0.14), transparent 44%),
    radial-gradient(circle at 0 100%, rgba(var(--accent-rgb), 0.08), transparent 40%),
    var(--bg-card);
  box-shadow: var(--shadow-lg);
}

.editorial-board-intro,
.editorial-lead-grid,
.editorial-members-block {
  position: relative;
  z-index: 1;
}

.editorial-board-intro {
  margin-bottom: var(--sp-8);
}

.editorial-board-eyebrow {
  display: inline-flex;
  margin-bottom: var(--sp-3);
  color: var(--accent-700);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
}

.editorial-board-intro h2 {
  margin-bottom: var(--sp-3);
}

.editorial-board-intro p {
  max-width: 54rem;
  color: var(--text-secondary);
}

.editorial-board-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  margin-top: var(--sp-5);
}

.editorial-board-stat {
  min-width: 140px;
  padding: var(--sp-3) var(--sp-4);
  border-radius: 16px;
  border: 1px solid var(--border-light);
  background: rgba(255, 255, 255, 0.74);
}

.editorial-board-stat strong {
  display: block;
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  color: var(--text-primary);
}

.editorial-board-stat span {
  color: var(--text-muted);
  font-size: var(--text-sm);
}

.editorial-lead-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--sp-4);
  margin-bottom: var(--sp-8);
}

.editorial-lead,
.editorial-member {
  border: 1px solid var(--border);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.8);
}

.editorial-lead {
  padding: var(--sp-5);
}

.editorial-lead__role {
  margin-bottom: var(--sp-2);
  color: var(--accent-700);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

.editorial-lead h3 {
  margin-bottom: var(--sp-2);
}

.editorial-lead__degree,
.editorial-lead__affiliation {
  color: var(--text-secondary);
}

.editorial-members-title {
  margin-bottom: var(--sp-4);
}

.editorial-members-grid {
  display: grid;
  gap: var(--sp-3);
}

.editorial-member {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--sp-4);
  padding: var(--sp-4) var(--sp-5);
  align-items: start;
}

.editorial-member__index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.5rem;
  height: 2.5rem;
  border-radius: 999px;
  background: var(--accent-100);
  color: var(--accent-700);
  font-weight: 700;
}

.editorial-member__content h4 {
  margin-bottom: 0.25rem;
}

.editorial-member__content p,
.editorial-member__content span {
  color: var(--text-secondary);
}

@media (max-width: 768px) {
  .editorial-board-shell {
    padding: var(--sp-5);
  }

  .editorial-member {
    grid-template-columns: 1fr;
  }
}

.archive-shell {
  display: grid;
  gap: var(--sp-5);
}

.archive-grid-dynamic {
  display: grid;
  gap: var(--sp-5);
}

.archive-overview {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.9fr);
  gap: var(--sp-5);
  padding: clamp(1.4rem, 3vw, 2rem);
  border: 1px solid var(--border);
  border-radius: 26px;
  background:
    radial-gradient(circle at top right, rgba(var(--accent-rgb), 0.08), transparent 44%),
    linear-gradient(145deg, rgba(255, 255, 255, 0.98), rgba(246, 249, 255, 0.92));
  box-shadow: var(--shadow-md);
}

.archive-overview__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--sp-3);
}

.archive-year {
  display: grid;
  gap: var(--sp-4);
}

.archive-year__head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: var(--sp-3);
}

.archive-year__label {
  margin-bottom: 0.25rem;
  font-size: var(--text-xs);
  color: var(--accent-700);
  font-weight: 700;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
}

.archive-year__summary {
  color: var(--text-secondary);
}

.archive-issue-card {
  display: block;
  text-decoration: none;
}

@media (max-width: 768px) {
  .archive-overview {
    grid-template-columns: 1fr;
  }

  .archive-overview__stats {
    grid-template-columns: 1fr 1fr;
  }

  .archive-year__head {
    align-items: start;
    flex-direction: column;
  }
}