/* ============================================================
   Exchange Opportunities Hub — Stylesheet
   Institutional / University Design System
   ============================================================ */

/* ── Google Fonts ─────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@600;700&family=Source+Sans+3:ital,wght@0,300;0,400;0,600;0,700;1,400&display=swap');

/* ── CSS Custom Properties ────────────────────────────────── */
:root {
  /* Core palette */
  --color-primary:       #0D2B5E;   /* deep institutional navy */
  --color-primary-dark:  #091E45;
  --color-primary-light: #1A3F7A;
  --color-accent:        #C8922A;   /* academic gold */
  --color-accent-light:  #E8B34B;

  /* Neutrals */
  --color-white:         #FFFFFF;
  --color-gray-50:       #F7F8FA;
  --color-gray-100:      #EEF0F4;
  --color-gray-200:      #DEE1E8;
  --color-gray-300:      #BCC1CC;
  --color-gray-500:      #7A8196;
  --color-gray-700:      #4A5168;
  --color-gray-900:      #1C2030;

  /* Semantic */
  --color-success:       #1A6B3C;
  --color-success-bg:    #EAF6EF;
  --color-warning:       #8B5A00;
  --color-warning-bg:    #FFF4DC;
  --color-danger:        #8B1A1A;
  --color-danger-bg:     #FCEAEA;
  --color-info:          #0D4D7A;
  --color-info-bg:       #E6F1F9;

  /* Typography */
  --font-display:  'Playfair Display', Georgia, serif;
  --font-body:     'Source Sans 3', 'Helvetica Neue', Arial, sans-serif;

  /* Spacing scale */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  20px;
  --space-6:  24px;
  --space-8:  32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;

  /* Borders & Radii */
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  12px;
  --radius-xl:  16px;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(13,43,94,0.08), 0 1px 2px rgba(13,43,94,0.06);
  --shadow-md:  0 4px 12px rgba(13,43,94,0.10), 0 2px 4px rgba(13,43,94,0.07);
  --shadow-lg:  0 12px 32px rgba(13,43,94,0.14), 0 4px 8px rgba(13,43,94,0.08);
  --shadow-xl:  0 24px 48px rgba(13,43,94,0.18), 0 8px 16px rgba(13,43,94,0.10);

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow:   400ms ease;

  /* Layout */
  --container-max:  1200px;
  --header-height:  64px;
}

/* ── Reset & Base ─────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-gray-900);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { display: block; max-width: 100%; }
a  { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

ul, ol { list-style: none; }

/* ── Typography helpers ───────────────────────────────────── */
.display-font { font-family: var(--font-display); }

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-primary);
}

h1 { font-size: clamp(1.75rem, 4vw, 2.8rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2.1rem); }
h3 { font-size: clamp(1.15rem, 2.5vw, 1.5rem); }
h4 { font-size: 1.125rem; }

/* ── Layout Utilities ─────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

@media (max-width: 640px) {
  .container { padding: 0 var(--space-4); }
}

.section-pad {
  padding: var(--space-16) 0;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ── Header / Navigation ──────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-primary);
  border-bottom: 3px solid var(--color-accent);
  height: var(--header-height);
  display: flex;
  align-items: center;
  box-shadow: 0 2px 16px rgba(13,43,94,0.25);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--color-accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.logo-text {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-white);
  line-height: 1.2;
}

.logo-text span {
  display: block;
  font-family: var(--font-body);
  font-size: 0.68rem;
  font-weight: 300;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.65);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-link {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.8);
  text-decoration: none;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-white);
  background: rgba(255,255,255,0.10);
  text-decoration: none;
}

.nav-link.active {
  color: var(--color-accent-light);
  background: rgba(200,146,42,0.15);
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

@media (max-width: 680px) {
  .nav-toggle { display: flex; }

  .site-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-primary-dark);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    border-top: 1px solid rgba(255,255,255,0.1);
    display: none;
    z-index: 200;
  }

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

  .nav-link {
    padding: var(--space-4) var(--space-6);
    border-radius: 0;
    border-bottom: 1px solid rgba(255,255,255,0.07);
    font-size: 0.9rem;
  }
}

/* ── Hero Section ─────────────────────────────────────────── */
.hero {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 55%, var(--color-primary-light) 100%);
  position: relative;
  overflow: hidden;
  padding: var(--space-20) 0 var(--space-16);
}

/* Decorative academic pattern overlay */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(200,146,42,0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255,255,255,0.04) 0%, transparent 40%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light), var(--color-accent));
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 780px;
  margin: 0 auto;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent-light);
  margin-bottom: var(--space-5);
}

.hero-eyebrow::before,
.hero-eyebrow::after {
  content: '';
  display: block;
  width: 24px;
  height: 1px;
  background: var(--color-accent);
}

.hero h1 {
  font-family: var(--font-display);
  color: var(--color-white);
  margin-bottom: var(--space-5);
}

.hero h1 em {
  font-style: normal;
  color: var(--color-accent-light);
}

.hero-subtitle {
  font-size: 1.125rem;
  font-weight: 300;
  color: rgba(255,255,255,0.80);
  line-height: 1.7;
  margin-bottom: var(--space-8);
  max-width: 580px;
  margin-left: auto;
  margin-right: auto;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--space-10);
  flex-wrap: wrap;
}

.stat-item {
  text-align: center;
}

.stat-number {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-accent-light);
  line-height: 1;
}

.stat-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.55);
  margin-top: var(--space-1);
}

/* ── Filters / Search Panel ───────────────────────────────── */
.filters-section {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-200);
  padding: var(--space-8) 0;
  position: sticky;
  top: var(--header-height);
  z-index: 50;
  box-shadow: 0 2px 12px rgba(13,43,94,0.06);
}

.filters-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-5);
  flex-wrap: wrap;
  gap: var(--space-3);
}

.filters-title {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-gray-500);
}

.filters-clear {
  background: none;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-sm);
  padding: var(--space-1) var(--space-3);
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--color-gray-700);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: none;
}

.filters-clear.visible {
  display: inline-block;
}

.filters-clear:hover {
  background: var(--color-gray-100);
  border-color: var(--color-gray-500);
}

.search-bar {
  position: relative;
  margin-bottom: var(--space-5);
}

.search-bar input {
  width: 100%;
  padding: var(--space-3) var(--space-4) var(--space-3) var(--space-10);
  font-family: var(--font-body);
  font-size: 0.95rem;
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  background: var(--color-gray-50);
  color: var(--color-gray-900);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
  outline: none;
}

.search-bar input:focus {
  border-color: var(--color-primary);
  background: var(--color-white);
  box-shadow: 0 0 0 3px rgba(13,43,94,0.10);
}

.search-bar input::placeholder {
  color: var(--color-gray-300);
}

.search-icon {
  position: absolute;
  left: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-gray-500);
  font-size: 1rem;
  pointer-events: none;
}

.filters-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: var(--space-3);
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.filter-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--color-gray-500);
}

.filter-select {
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-body);
  font-size: 0.875rem;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-sm);
  background: var(--color-gray-50);
  color: var(--color-gray-700);
  cursor: pointer;
  transition: border-color var(--transition-fast);
  outline: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%237A8196' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: var(--space-8);
}

.filter-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(13,43,94,0.10);
}

/* ── Results Section ──────────────────────────────────────── */
.results-section {
  background: var(--color-gray-50);
  min-height: 400px;
  padding: var(--space-10) 0 var(--space-16);
}

.results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
  gap: var(--space-3);
}

.results-count {
  font-size: 0.9rem;
  color: var(--color-gray-700);
}

.results-count strong {
  color: var(--color-primary);
  font-weight: 700;
}

.sort-control {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.85rem;
  color: var(--color-gray-700);
}

.sort-control select {
  font-family: var(--font-body);
  font-size: 0.85rem;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-sm);
  padding: var(--space-1) var(--space-3);
  background: var(--color-white);
  cursor: pointer;
  outline: none;
}

/* ── Opportunity Cards ────────────────────────────────────── */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-6);
}

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

.opp-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  cursor: pointer;
}

.opp-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}

.card-header {
  padding: var(--space-5) var(--space-5) var(--space-4);
  border-bottom: 1px solid var(--color-gray-100);
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.card-flag {
  font-size: 1.75rem;
  line-height: 1;
  flex-shrink: 0;
  margin-top: 2px;
}

.card-institution-info {
  flex: 1;
  min-width: 0;
}

.card-institution {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.25;
  margin-bottom: var(--space-1);
}

.card-location {
  font-size: 0.82rem;
  color: var(--color-gray-500);
  display: flex;
  align-items: center;
  gap: 4px;
}

.card-location::before {
  content: '📍';
  font-size: 0.75rem;
}

.card-body {
  padding: var(--space-4) var(--space-5);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.card-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}

.badge-level {
  background: var(--color-info-bg);
  color: var(--color-info);
}

.badge-scholarship-yes {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.badge-scholarship-partial {
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

.badge-scholarship-no {
  background: var(--color-gray-100);
  color: var(--color-gray-700);
}

.badge-deadline-open {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.badge-deadline-closing {
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

.badge-deadline-closed {
  background: var(--color-danger-bg);
  color: var(--color-danger);
}

.card-deadline-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.83rem;
}

.deadline-label {
  color: var(--color-gray-500);
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.deadline-value {
  font-weight: 600;
  color: var(--color-gray-700);
}

.card-footer {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-gray-100);
  display: flex;
  gap: var(--space-3);
  align-items: center;
}

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
  line-height: 1.4;
}

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

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

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

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-gray-300);
}

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

.btn-sm {
  padding: var(--space-1) var(--space-3);
  font-size: 0.78rem;
}

.btn-lg {
  padding: var(--space-3) var(--space-6);
  font-size: 1rem;
}

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

.btn-ghost:hover {
  background: var(--color-gray-100);
  color: var(--color-primary);
}

/* ── Modal ────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(9,30,69,0.55);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: var(--space-6);
  overflow-y: auto;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 720px;
  box-shadow: var(--shadow-xl);
  transform: translateY(20px) scale(0.98);
  transition: transform var(--transition-normal), opacity var(--transition-normal);
  margin: auto;
}

.modal-overlay.open .modal {
  transform: translateY(0) scale(1);
}

.modal-header {
  padding: var(--space-8) var(--space-8) var(--space-5);
  border-bottom: 1px solid var(--color-gray-100);
  position: relative;
}

.modal-header-top {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.modal-flag {
  font-size: 2.5rem;
  line-height: 1;
  flex-shrink: 0;
}

.modal-institution {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--color-primary);
  margin-bottom: var(--space-1);
  line-height: 1.2;
}

.modal-location {
  font-size: 0.95rem;
  color: var(--color-gray-500);
}

.modal-close {
  position: absolute;
  top: var(--space-5);
  right: var(--space-5);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-gray-100);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.1rem;
  color: var(--color-gray-700);
  transition: background var(--transition-fast);
  line-height: 1;
}

.modal-close:hover {
  background: var(--color-gray-200);
  color: var(--color-gray-900);
}

.modal-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.modal-body {
  padding: var(--space-6) var(--space-8);
  overflow-y: auto;
  max-height: calc(80vh - 180px);
}

.detail-section {
  margin-bottom: var(--space-6);
}

.detail-section:last-child {
  margin-bottom: 0;
}

.detail-section-title {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  border-bottom: 1px solid var(--color-gray-200);
  padding-bottom: var(--space-2);
  margin-bottom: var(--space-4);
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-4);
}

.detail-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.detail-item-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-gray-500);
}

.detail-item-value {
  font-size: 0.92rem;
  color: var(--color-gray-900);
  line-height: 1.5;
}

.detail-item-value.full-width {
  grid-column: 1 / -1;
}

.detail-item-value a {
  color: var(--color-primary);
  text-decoration: underline;
  word-break: break-all;
}

.detail-item-value a:hover {
  color: var(--color-primary-light);
}

.modal-footer {
  padding: var(--space-5) var(--space-8);
  border-top: 1px solid var(--color-gray-100);
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  background: var(--color-gray-50);
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}

@media (max-width: 640px) {
  .modal-header,
  .modal-body,
  .modal-footer {
    padding-left: var(--space-5);
    padding-right: var(--space-5);
  }

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

/* ── States: Loading / Empty / Error ──────────────────────── */
.state-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-20) var(--space-6);
  text-align: center;
  min-height: 300px;
}

.state-icon {
  font-size: 3rem;
  margin-bottom: var(--space-5);
  line-height: 1;
}

.state-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.state-description {
  font-size: 0.95rem;
  color: var(--color-gray-500);
  max-width: 400px;
  line-height: 1.6;
}

/* Loading spinner */
.spinner {
  width: 44px;
  height: 44px;
  border: 3px solid var(--color-gray-200);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: var(--space-5);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ── About page content ───────────────────────────────────── */
.about-hero {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  padding: var(--space-16) 0 var(--space-12);
  position: relative;
}

.about-hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light), var(--color-accent));
}

.about-hero h1 {
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.about-hero p {
  color: rgba(255,255,255,0.75);
  font-size: 1.05rem;
  max-width: 560px;
}

.about-section {
  padding: var(--space-12) 0;
  border-bottom: 1px solid var(--color-gray-100);
}

.about-section:last-child {
  border-bottom: none;
}

.about-section h2 {
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-3);
  border-bottom: 3px solid var(--color-accent);
  display: inline-block;
}

.about-section p {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-gray-700);
  margin-bottom: var(--space-4);
  max-width: 720px;
}

.about-section p:last-child { margin-bottom: 0; }

.steps-list {
  counter-reset: steps;
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  margin-top: var(--space-5);
}

.step-item {
  display: flex;
  gap: var(--space-5);
  align-items: flex-start;
}

.step-number {
  counter-increment: steps;
  width: 36px;
  height: 36px;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  flex-shrink: 0;
}

.step-content h4 {
  font-family: var(--font-display);
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}

.step-content p {
  margin-bottom: 0 !important;
  font-size: 0.92rem;
}

.info-box {
  background: var(--color-info-bg);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: var(--space-5) var(--space-6);
  margin-top: var(--space-6);
}

.info-box p {
  margin-bottom: 0 !important;
  color: var(--color-gray-900) !important;
  font-size: 0.9rem !important;
}

.warning-box {
  background: var(--color-warning-bg);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: var(--space-5) var(--space-6);
  margin-top: var(--space-6);
}

.fields-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  margin-top: var(--space-5);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.fields-table th {
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--space-3) var(--space-4);
  text-align: left;
  font-weight: 600;
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.fields-table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-gray-100);
  color: var(--color-gray-700);
  vertical-align: top;
  line-height: 1.5;
}

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

.fields-table tr:hover td {
  background: var(--color-gray-50);
}

.fields-table code {
  font-family: 'Courier New', monospace;
  font-size: 0.82rem;
  background: var(--color-gray-100);
  padding: 1px 5px;
  border-radius: 3px;
  color: var(--color-primary);
}

/* ── Footer ───────────────────────────────────────────────── */
.site-footer {
  background: var(--color-gray-900);
  color: rgba(255,255,255,0.6);
  padding: var(--space-12) 0 var(--space-8);
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-10);
}

@media (max-width: 700px) {
  .footer-inner { grid-template-columns: 1fr; gap: var(--space-8); }
}

.footer-brand .logo-text {
  color: var(--color-white);
  font-size: 1.15rem;
  margin-bottom: var(--space-3);
  display: block;
}

.footer-brand p {
  font-size: 0.88rem;
  line-height: 1.65;
  max-width: 300px;
}

.footer-col-title {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  margin-bottom: var(--space-4);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-links a {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-accent-light);
  text-decoration: none;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: 0.8rem;
}

.footer-bottom a {
  color: rgba(255,255,255,0.4);
}

.footer-bottom a:hover {
  color: var(--color-accent-light);
}

/* ── Notification banner ──────────────────────────────────── */
.notification-bar {
  background: var(--color-warning-bg);
  border-bottom: 1px solid rgba(200,146,42,0.3);
  padding: var(--space-3) var(--space-4);
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-warning);
  display: none;
}

.notification-bar.visible {
  display: block;
}

/* ── Active filter chips ──────────────────────────────────── */
.active-filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-3);
  min-height: 0;
}

.filter-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 3px 10px;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
}

.filter-chip button {
  background: none;
  border: none;
  color: rgba(255,255,255,0.7);
  cursor: pointer;
  line-height: 1;
  padding: 0;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  transition: color var(--transition-fast);
}

.filter-chip button:hover {
  color: var(--color-white);
}

/* ── Scroll to top ─────────────────────────────────────────── */
.scroll-top {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  width: 42px;
  height: 42px;
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal), transform var(--transition-fast);
  z-index: 90;
}

.scroll-top.visible {
  opacity: 1;
  pointer-events: auto;
}

.scroll-top:hover {
  background: var(--color-primary-light);
  transform: translateY(-2px);
}

/* ── Accessibility ────────────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* ── Print styles ─────────────────────────────────────────── */
@media print {
  .site-header, .filters-section, .modal-overlay, .scroll-top { display: none; }
  .opp-card { break-inside: avoid; }
}