/* ============================================================
   LEAP — AI Literacy for Everyone
   Design tokens and base styles
   ============================================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=Inter:wght@400;500;600&display=swap');

/* --- Design Tokens --- */
:root {
  /* Color */
  --color-bg:           #F7F6F2;
  --color-surface:      #FFFFFF;
  --color-surface-alt:  #EEF0F6;
  --color-navy:         #1A1A2E;
  --color-navy-light:   #2A2A48;
  --color-accent:       #2056C8;
  --color-accent-hover: #1844A8;
  --color-text:         #1A1A2E;
  --color-text-mid:     #4A5568;
  --color-text-muted:   #718096;
  --color-border:       #D9DCE6;
  --color-tag-bg:       #E8EDF8;
  --color-tag-text:     #2056C8;
  --color-tag-active-bg: #2056C8;
  --color-tag-active-text: #ffffff;

  /* Type */
  --font-display:    'DM Serif Display', Georgia, serif;
  --font-body:       'Inter', system-ui, sans-serif;

  /* Scale */
  --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:   1.875rem;
  --text-4xl:   2.25rem;
  --text-5xl:   3rem;

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

  /* Layout */
  --max-width:        1200px;
  --nav-height:       64px;
  --card-radius:      6px;
  --radius-sm:        4px;
  --radius-md:        6px;

  /* Shadows */
  --shadow-card:      0 1px 3px rgba(26,26,46,0.08), 0 1px 2px rgba(26,26,46,0.04);
  --shadow-card-hover:0 4px 12px rgba(26,26,46,0.12), 0 2px 4px rgba(26,26,46,0.06);
  --shadow-nav:       0 1px 0 var(--color-border);

  /* Transitions */
  --transition-fast:  150ms ease;
  --transition-med:   250ms ease;
}

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

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

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  min-height: 100vh;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button { cursor: pointer; font-family: var(--font-body); }
ul, ol { list-style: none; }

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

.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;
}


/* ============================================================
   NAVIGATION
   ============================================================ */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  height: var(--nav-height);
}

.nav-inner {
  display: flex;
  align-items: center;
  height: var(--nav-height);
  gap: var(--space-8);
}

/* Wordmark */
.nav-wordmark {
  flex-shrink: 0;
  text-decoration: none;
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
}

.nav-wordmark-text {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-navy);
  letter-spacing: -0.02em;
  line-height: 1;
}

.nav-wordmark-sub {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: none;
}

/* Nav links */
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex: 1;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-mid);
  text-decoration: none;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-text);
  background: var(--color-surface-alt);
  text-decoration: none;
}

.nav-link.active {
  color: var(--color-accent);
}

.nav-link .chevron {
  width: 12px;
  height: 12px;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.nav-item:hover .chevron,
.nav-item.open .chevron {
  transform: rotate(180deg);
}

/* Dropdown */
.nav-dropdown {
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 0;
  min-width: 220px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: 0 8px 24px rgba(26,26,46,0.12);
  padding: var(--space-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
  pointer-events: none;
}

.nav-item:hover .nav-dropdown,
.nav-item.open .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.dropdown-link {
  display: block;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-mid);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.dropdown-link:hover {
  background: var(--color-surface-alt);
  color: var(--color-text);
  text-decoration: none;
}

.dropdown-divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--space-2) 0;
}

/* Nav right */
.nav-right {
  margin-left: auto;
  flex-shrink: 0;
}

/* Mobile nav toggle */
.nav-mobile-toggle {
  display: none;
  background: none;
  border: none;
  padding: var(--space-2);
  color: var(--color-text);
}

/* Mobile nav */
.nav-mobile {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-surface);
  overflow-y: auto;
  padding: var(--space-4) var(--space-6);
  z-index: 99;
}

.nav-mobile.open { display: block; }

.nav-mobile-section {
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
}

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

.nav-mobile-label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.06em;
  padding: var(--space-2) 0 var(--space-1);
  display: block;
}

.nav-mobile-link {
  display: block;
  padding: var(--space-3) 0;
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  border-bottom: 1px solid var(--color-surface-alt);
}

.nav-mobile-link:last-child { border-bottom: none; }


/* ============================================================
   HOMEPAGE — HERO
   ============================================================ */

.hero {
  background: var(--color-navy);
  color: #fff;
  padding: var(--space-20) 0 var(--space-16);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.hero-headline {
  font-family: var(--font-display);
  font-size: var(--text-5xl);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: var(--space-6);
}

.hero-headline em {
  font-style: italic;
  color: #A8C4F0;
}

.hero-body {
  font-size: var(--text-lg);
  color: rgba(255,255,255,0.75);
  line-height: 1.65;
  max-width: 48ch;
  margin-bottom: var(--space-8);
}

.hero-ctas {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.hero-cta-label {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.5);
  margin-bottom: var(--space-1);
}

.audience-ctas {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.hero-visual {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.hero-stat-card {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-md);
  padding: var(--space-5) var(--space-6);
}

.hero-stat-number {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  color: #fff;
  line-height: 1;
  margin-bottom: var(--space-1);
}

.hero-stat-desc {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.6);
  line-height: 1.5;
}

/* ============================================================
   HOMEPAGE — AUDIENCE QUICKLINKS
   ============================================================ */

.audience-section {
  background: var(--color-surface);
  padding: var(--space-12) 0;
  border-bottom: 1px solid var(--color-border);
}

.section-intro {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--space-8);
  gap: var(--space-4);
}

.section-heading {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  color: var(--color-navy);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.section-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-accent);
  white-space: nowrap;
  flex-shrink: 0;
}

.audience-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.audience-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  padding: var(--space-6);
  text-decoration: none;
  display: block;
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.audience-card:hover {
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-accent);
  text-decoration: none;
}

.audience-card-icon {
  width: 40px;
  height: 40px;
  background: var(--color-surface-alt);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
  color: var(--color-accent);
}

.audience-card-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-navy);
  margin-bottom: var(--space-2);
}

.audience-card-desc {
  font-size: var(--text-sm);
  color: var(--color-text-mid);
  line-height: 1.55;
  margin-bottom: var(--space-4);
}

.audience-card-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.audience-card-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-accent);
}


/* ============================================================
   SECTION PAGES — HEADER
   ============================================================ */

.page-header {
  background: var(--color-navy);
  color: #fff;
  padding: var(--space-12) 0 var(--space-10);
}

.page-header-inner {
  max-width: 680px;
}

.page-title {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  color: #fff;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.page-subtitle {
  font-size: var(--text-lg);
  color: rgba(255,255,255,0.7);
  line-height: 1.6;
  max-width: 56ch;
}


/* ============================================================
   FILTER BAR
   ============================================================ */

.filter-bar {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-4) 0;
  position: sticky;
  top: var(--nav-height);
  z-index: 50;
}

.filter-bar-inner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.filter-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  white-space: nowrap;
  flex-shrink: 0;
}

.filter-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.filter-tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 500;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-mid);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.filter-tag:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.filter-tag.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

.filter-clear {
  margin-left: auto;
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  background: none;
  border: none;
  padding: var(--space-1) var(--space-2);
  cursor: pointer;
  display: none;
}

.filter-clear.visible { display: inline-flex; }
.filter-clear:hover { color: var(--color-text); }


/* ============================================================
   RESOURCE CARDS — GRID AND CARD
   ============================================================ */

.cards-section {
  padding: var(--space-10) 0 var(--space-16);
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

.resource-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
  text-decoration: none;
  color: inherit;
}

.resource-card:hover {
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-accent);
  transform: translateY(-1px);
  text-decoration: none;
}

.resource-card[hidden] {
  display: none;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.card-format {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

.card-duration {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.card-meta-dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--color-border);
  flex-shrink: 0;
}

.card-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  line-height: 1.25;
  color: var(--color-navy);
  margin-bottom: var(--space-2);
  letter-spacing: -0.01em;
}

.card-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
  line-height: 1.4;
}

.card-summary {
  font-size: var(--text-sm);
  color: var(--color-text-mid);
  line-height: 1.6;
  flex: 1;
  margin-bottom: var(--space-5);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

.card-tag {
  font-size: var(--text-xs);
  font-weight: 500;
  padding: 2px var(--space-2);
  border-radius: 999px;
  background: var(--color-tag-bg);
  color: var(--color-tag-text);
  white-space: nowrap;
}

.card-action {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-accent);
  margin-top: auto;
}

.card-action svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.resource-card:hover .card-action svg {
  transform: translateX(2px);
}

/* No results state */
.cards-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--space-16) var(--space-8);
  color: var(--color-text-muted);
}

.cards-empty-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  margin-bottom: var(--space-3);
  color: var(--color-text-mid);
}


/* ============================================================
   DETAIL PAGE
   ============================================================ */

.detail-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--space-12);
  padding: var(--space-10) 0 var(--space-16);
  align-items: start;
}

.detail-body {
  min-width: 0;
}

.detail-section-heading {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-navy);
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-border);
}

.detail-body > *:first-child .detail-section-heading {
  margin-top: 0;
}

.detail-paragraph {
  font-size: var(--text-base);
  color: var(--color-text);
  line-height: 1.75;
  max-width: 68ch;
  margin-bottom: var(--space-4);
}

.detail-list {
  padding-left: var(--space-5);
  margin-bottom: var(--space-4);
}

.detail-list li {
  list-style: disc;
  font-size: var(--text-base);
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: var(--space-2);
  max-width: 66ch;
}

.detail-numbered-list {
  padding-left: var(--space-5);
  margin-bottom: var(--space-4);
}

.detail-numbered-list li {
  list-style: decimal;
  font-size: var(--text-base);
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: var(--space-3);
  max-width: 66ch;
}

.detail-download {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  margin-right: var(--space-3);
  margin-bottom: var(--space-3);
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.detail-download:hover {
  border-color: var(--color-accent);
  background: var(--color-surface-alt);
  text-decoration: none;
}

.detail-download svg {
  width: 14px;
  height: 14px;
  color: var(--color-accent);
  flex-shrink: 0;
}

/* Sidebar */
.detail-sidebar {
  position: sticky;
  top: calc(var(--nav-height) + var(--space-6));
}

.sidebar-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  padding: var(--space-5);
  margin-bottom: var(--space-4);
}

.sidebar-card-title {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  margin-bottom: var(--space-3);
  text-transform: none;
}

.sidebar-meta-row {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.sidebar-meta-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-meta-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.sidebar-meta-value {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
}

.sidebar-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}


/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
  white-space: nowrap;
  font-family: var(--font-body);
}

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

.btn-primary {
  background: var(--color-accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  color: #fff;
}

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--color-border);
  color: var(--color-text);
}

.btn-outline:hover {
  border-color: var(--color-text);
  background: transparent;
}

.btn-ghost-light {
  background: rgba(255,255,255,0.1);
  border: 1.5px solid rgba(255,255,255,0.2);
  color: #fff;
}

.btn-ghost-light:hover {
  background: rgba(255,255,255,0.18);
  color: #fff;
}

.btn-audience {
  background: rgba(255,255,255,0.1);
  border: 1.5px solid rgba(255,255,255,0.25);
  color: rgba(255,255,255,0.9);
  border-radius: 999px;
  font-size: var(--text-sm);
}

.btn-audience:hover {
  background: rgba(255,255,255,0.18);
  border-color: rgba(255,255,255,0.5);
  color: #fff;
}


/* ============================================================
   HOMEPAGE — FEATURED SECTIONS
   ============================================================ */

.featured-section {
  padding: var(--space-16) 0;
  border-bottom: 1px solid var(--color-border);
}

.featured-section:last-of-type { border-bottom: none; }

.featured-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-5);
  margin-top: var(--space-8);
}

/* News/event cards on homepage */
.news-card {
  padding: var(--space-5) 0;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  gap: var(--space-5);
  text-decoration: none;
  color: inherit;
}

.news-card:first-child { padding-top: 0; }
.news-card:last-child { border-bottom: none; padding-bottom: 0; }

.news-card:hover .news-card-title { color: var(--color-accent); }
.news-card:hover { text-decoration: none; }

.news-card-date {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  white-space: nowrap;
  min-width: 80px;
  padding-top: 3px;
}

.news-card-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-navy);
  line-height: 1.3;
  margin-bottom: var(--space-1);
  transition: color var(--transition-fast);
}

.news-card-summary {
  font-size: var(--text-sm);
  color: var(--color-text-mid);
  line-height: 1.55;
}


/* ============================================================
   ABOUT PAGE
   ============================================================ */

.about-intro {
  padding: var(--space-12) 0;
  max-width: 760px;
}

.about-body-text {
  font-size: var(--text-lg);
  color: var(--color-text-mid);
  line-height: 1.75;
  max-width: 64ch;
}

.about-tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--color-border);
  margin-bottom: var(--space-10);
}

.about-tab {
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  border: none;
  background: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.about-tab.active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.about-tab:hover { color: var(--color-text); }

.about-panel { display: none; }
.about-panel.active { display: block; }

/* Team grid */
.team-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-6);
}

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

.team-avatar {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-md);
  background: var(--color-surface-alt);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text-muted);
}

.team-name {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-navy);
  margin-bottom: var(--space-1);
}

.team-title {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}

.team-affiliation {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.team-bio {
  font-size: var(--text-sm);
  color: var(--color-text-mid);
  line-height: 1.65;
}

/* Philosophy */
.philosophy-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-10);
  margin-top: var(--space-6);
}

.philosophy-item-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-navy);
  margin-bottom: var(--space-4);
  line-height: 1.25;
}

.philosophy-item-text {
  font-size: var(--text-base);
  color: var(--color-text-mid);
  line-height: 1.75;
  max-width: 52ch;
}

/* Research list in About */
.research-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  margin-top: var(--space-6);
}

.research-item {
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  text-decoration: none;
  display: block;
  transition: border-color var(--transition-fast);
}

.research-item:hover { border-color: var(--color-accent); text-decoration: none; }

.research-item-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-navy);
  line-height: 1.3;
  margin-bottom: var(--space-2);
}

.research-item-meta {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.research-item-summary {
  font-size: var(--text-sm);
  color: var(--color-text-mid);
  line-height: 1.6;
}


/* ============================================================
   FOOTER
   ============================================================ */

.site-footer {
  background: var(--color-navy);
  color: rgba(255,255,255,0.7);
  padding: var(--space-12) 0 var(--space-8);
  margin-top: var(--space-16);
}

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

.footer-brand {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: #fff;
  margin-bottom: var(--space-3);
}

.footer-tagline {
  font-size: var(--text-sm);
  line-height: 1.6;
  max-width: 34ch;
}

.footer-col-title {
  font-size: var(--text-xs);
  font-weight: 600;
  color: rgba(255,255,255,0.4);
  letter-spacing: 0.06em;
  margin-bottom: var(--space-4);
}

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

.footer-link {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: #fff;
  text-decoration: none;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.35);
}

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

.footer-bottom a:hover { color: rgba(255,255,255,0.7); text-decoration: none; }


/* ============================================================
   LOADING STATE
   ============================================================ */

.loading-spinner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-16);
  color: var(--color-text-muted);
  gap: var(--space-4);
}

.spinner-ring {
  width: 32px;
  height: 32px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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


/* ============================================================
   SKELETON CARDS — shown while data loads
   ============================================================ */

@keyframes shimmer {
  0%   { background-position: -600px 0; }
  100% { background-position:  600px 0; }
}

.skeleton-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  box-shadow: var(--shadow-card);
  /* No hover effect — purely decorative while loading */
  pointer-events: none;
  user-select: none;
}

/* The shimmer pulse shared by all skeleton lines */
.sk {
  border-radius: 3px;
  background: linear-gradient(
    90deg,
    var(--color-surface-alt) 25%,
    var(--color-border)       50%,
    var(--color-surface-alt) 75%
  );
  background-size: 600px 100%;
  animation: shimmer 1.4s ease-in-out infinite;
}

.sk-meta   { height: 11px; width: 40%; }
.sk-title  { height: 22px; width: 85%; margin-top: var(--space-1); }
.sk-title-short { height: 22px; width: 55%; }
.sk-sub    { height: 13px; width: 65%; }
.sk-line   { height: 13px; width: 100%; }
.sk-line-short { height: 13px; width: 75%; }
.sk-tags   { display: flex; gap: var(--space-2); margin-top: var(--space-2); }
.sk-tag    { height: 20px; width: 64px; border-radius: 999px; }
.sk-action { height: 14px; width: 30%; margin-top: var(--space-2); }

/* Reduce motion: freeze the shimmer for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  .sk { animation: none; background: var(--color-surface-alt); }
}


/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .audience-cards { grid-template-columns: repeat(2, 1fr); }
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-8); }
  .detail-layout { grid-template-columns: 1fr; }
  .detail-sidebar { position: static; }
  .philosophy-content { grid-template-columns: 1fr; gap: var(--space-8); }
}

@media (max-width: 768px) {
  :root {
    --text-5xl: 2.25rem;
    --text-4xl: 1.875rem;
    --text-3xl: 1.5rem;
  }

  .nav-links { display: none; }
  .nav-mobile-toggle { display: block; }
  .nav-right { display: none; }

  .audience-cards { grid-template-columns: 1fr; }
  .cards-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; }

  .section-intro {
    flex-direction: column;
    gap: var(--space-2);
  }

  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: var(--space-3); text-align: center; }
  .featured-row { grid-template-columns: 1fr; }
  .about-tabs { overflow-x: auto; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

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