/* ==========================================================================
   ACM MSKÜ Student Chapter — Design System
   ========================================================================== */

:root {
  /* ACM-inspired blues, on an off-white base */
  --blue-900: #001B33;
  --blue-800: #00294A;
  --blue-700: #003B5C;
  --blue-600: #00558C;
  --blue-500: #0072CE;   /* primary */
  --blue-400: #2B93E0;
  --blue-100: #E3F1FB;
  --blue-50:  #F2F8FC;

  --ink:      #0B1420;
  --ink-soft: #4B5768;
  --ink-faint:#8896A6;
  --bg-page:  #F2F8FC;   /* kırık mavi zemin */
  --paper:    #FFFFFF;   /* kartlar */
  --line:     #DCE7EF;
  --line-soft:#E7F0F6;

  --font-display: 'Clash Display', 'Lexend', system-ui, sans-serif;
  --font-body: 'Lexend', system-ui, -apple-system, sans-serif;

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 28px;

  --shadow-sm: 0 1px 2px rgba(0, 27, 51, 0.05);
  --shadow-md: 0 16px 40px -20px rgba(0, 27, 51, 0.28);
  --shadow-lg: 0 30px 70px -30px rgba(0, 27, 51, 0.35);

  --ease: cubic-bezier(.22, 1, .36, 1);
  --container: 1180px;
}

/* ---------- Reset ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body, h1, h2, h3, h4, p, ul, figure { margin: 0; padding: 0; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; background: none; border: none; cursor: pointer; }

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg-page);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
/* Sticky footer: keeps the footer pinned to the bottom of the viewport on short pages */
main { flex: 1 0 auto; }
.site-footer { flex-shrink: 0; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--blue-900);
  letter-spacing: -0.01em;
  line-height: 1.1;
}

.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--blue-500); color: #fff; padding: 10px 16px; z-index: 999;
  border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ---------- Layout helpers ---------- */
.section {
  max-width: var(--container);
  margin: 0 auto;
  padding: 120px 32px;
}
.section--tint { background: var(--blue-50); max-width: none; }
/* Used when a .section is the first element on a page (must clear the fixed navbar) */
.section--top { padding-top: 150px; }
.section--tint > * { max-width: var(--container); margin-left: auto; margin-right: auto; }

.section-intro {
  max-width: var(--container);
  margin: 0 auto;
  padding: 64px 32px 0;
}
/* Used when a section-intro is the first element on a page (must clear the fixed navbar) */
.section-intro--top { padding-top: 150px; }

/* ---------- Homepage quicklinks ---------- */
.quicklinks-section { padding-top: 56px; }
.quicklinks-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.quicklink-card {
  display: flex; flex-direction: column; align-items: flex-start; gap: 8px;
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 32px; transition: all .3s var(--ease);
}
.quicklink-card:hover { border-color: var(--blue-400); box-shadow: var(--shadow-md); transform: translateY(-4px); }
.quicklink-icon {
  width: 46px; height: 46px; border-radius: 12px; background: var(--blue-50);
  color: var(--blue-500); display: flex; align-items: center; justify-content: center;
  margin-bottom: 6px;
}
.quicklink-card h3 { font-size: 19px; }
.quicklink-card p { font-size: 14.5px; color: var(--ink-soft); margin-bottom: 4px; }
.quicklink-card .link-arrow { margin-top: 4px; pointer-events: none; }
.quicklink-card:hover .link-arrow { border-color: var(--blue-500); }

/* ---------- Homepage upcoming events ---------- */
.home-events-section { padding-top: 0; }
.home-events-head {
  display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; flex-wrap: wrap;
  margin-bottom: 32px;
}
.home-events-head h2 { font-size: clamp(28px, 3.4vw, 38px); }
.home-events-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.home-event-card {
  display: flex; align-items: center; gap: 22px; padding: 18px;
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius-lg);
  transition: all .3s var(--ease);
}
.home-event-card:hover { border-color: var(--blue-400); box-shadow: var(--shadow-md); transform: translateY(-4px); }
.home-event-cover {
  width: 104px; aspect-ratio: 4 / 5; border-radius: var(--radius-md); overflow: hidden;
  background: var(--blue-50); flex-shrink: 0;
}
.home-event-cover img { width: 100%; height: 100%; object-fit: cover; display: block; }
.home-event-body { display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.home-event-date { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--blue-500); }
.home-event-body h3 { font-size: 18px; }
.home-event-info { font-size: 14px; color: var(--ink-soft); }

/* ---------- Homepage featured article (Medium) ---------- */
.featured-section { padding-top: 0; }
.featured-card {
  display: flex; align-items: center; gap: 32px; flex-wrap: wrap;
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 40px;
}
.featured-card-cover {
  width: 220px; aspect-ratio: 16 / 9; border-radius: var(--radius-md); overflow: hidden;
  background: var(--blue-50); flex-shrink: 0;
}
.featured-card-cover img { width: 100%; height: 100%; object-fit: cover; display: block; }
.featured-card-body { flex: 1 1 320px; display: flex; flex-direction: column; gap: 14px; }
.featured-card-body .kicker { margin-bottom: 0; }
.featured-card-body h3 { font-size: 21px; }
.featured-card-body p { font-size: 15px; color: var(--ink-soft); }
.featured-card-actions { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.featured-card-actions .link-arrow { margin-top: 0; }

.section-head { max-width: 680px; margin-bottom: 56px; }
.section-head--solo { max-width: none; margin: 0 auto 40px; text-align: center; }
.section-title-solo { font-size: clamp(34px, 4.4vw, 52px); }
.section-lead {
  margin-top: 14px; font-size: 17px; color: var(--ink-soft); max-width: 560px;
}
.section-lead--left { max-width: 680px; }

/* Section label — replaces old numbered pill + dot eyebrow */
.kicker {
  display: inline-flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 13px;
  text-transform: uppercase; letter-spacing: 0.12em; color: var(--blue-600);
  margin-bottom: 16px;
}
.kicker::before {
  content: ''; width: 22px; height: 3px; border-radius: 2px;
  background: var(--blue-500); flex-shrink: 0;
}
.kicker--onblue { color: rgba(255,255,255,0.75); }
.kicker--onblue::before { background: rgba(255,255,255,0.6); }
.kicker--center { justify-content: center; }

.text-accent { color: var(--blue-500); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-weight: 600; font-size: 15px; padding: 14px 24px;
  border-radius: 100px; transition: all .35s var(--ease);
  white-space: nowrap;
}
.btn svg { transition: transform .35s var(--ease); }
.btn:hover svg { transform: translateX(3px); }

.btn-primary { background: var(--blue-900); color: #fff; }
.btn-primary:hover { background: var(--blue-700); }

.btn-soft { background: transparent; color: var(--blue-900); border: 1.5px solid var(--line); }
.btn-soft:hover { border-color: var(--blue-900); }

.btn-onblue { background: #fff; color: var(--blue-700); }
.btn-onblue:hover { background: var(--blue-100); }

.btn-outline-onblue { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,0.35); }
.btn-outline-onblue:hover { border-color: #fff; background: rgba(255,255,255,0.06); }

.btn-nav { padding: 13px 24px; font-size: 15px; }
.btn-lg { padding: 16px 28px; font-size: 15.5px; }

.link-arrow {
  display: inline-flex; align-items: center; gap: 6px; margin-top: 18px;
  font-weight: 600; color: var(--blue-500); font-size: 14.5px;
  border-bottom: 1.5px solid transparent; transition: border-color .3s var(--ease);
}
.link-arrow:hover { border-color: var(--blue-500); }

/* ==========================================================================
   NAVBAR
   ========================================================================== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 18px 0; transition: all .4s var(--ease);
}
.nav.is-scrolled {
  padding: 12px 0; background: rgba(250,249,246,0.86); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line-soft); box-shadow: 0 4px 24px -12px rgba(0,27,51,0.12);
}
.nav-inner {
  max-width: var(--container); margin: 0 auto; padding: 0 32px;
  display: flex; align-items: center; justify-content: space-between;
}

.brand { display: flex; align-items: center; }
.brand-logo { height: 80px; width: auto; transition: height .3s var(--ease); }
.nav.is-scrolled .brand-logo { height: 64px; }

.nav-toggle {
  display: none; flex-direction: column; gap: 5px; padding: 8px; z-index: 110;
}
.nav-toggle span { width: 22px; height: 2px; background: var(--blue-900); border-radius: 2px; transition: all .3s var(--ease); }

.nav-menu { display: flex; align-items: center; gap: 40px; }
.nav-menu > ul { display: flex; align-items: center; gap: 34px; }

.nav-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 16px; font-weight: 600; color: var(--blue-900);
  padding: 6px 0; position: relative;
}
.nav-link::after {
  content: ''; position: absolute; left: 0; bottom: -2px; width: 0; height: 2px;
  background: var(--blue-500); transition: width .3s var(--ease);
}
.nav-link:hover::after, .nav-link.is-active::after { width: 100%; }
.nav-link .chev { transition: transform .3s var(--ease); }

.has-dropdown { position: relative; }
.has-dropdown:hover .chev { transform: rotate(180deg); }
.dropdown {
  position: absolute; top: calc(100% + 18px); left: -18px; min-width: 220px;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-md);
  box-shadow: var(--shadow-md); padding: 10px;
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: all .3s var(--ease);
}
.has-dropdown:hover .dropdown,
.has-dropdown:focus-within .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown a {
  display: block; padding: 11px 16px; border-radius: 10px; font-size: 15px; font-weight: 500;
  color: var(--ink-soft); transition: all .2s var(--ease);
}
.dropdown a:hover { background: var(--blue-50); color: var(--blue-600); }

.lang-toggle {
  display: flex; align-items: center; background: var(--line-soft);
  border-radius: 100px; padding: 3px;
}
.lang-btn {
  padding: 7px 15px; border-radius: 100px; font-size: 13.5px; font-weight: 700;
  letter-spacing: 0.03em; color: var(--ink-faint); transition: all .2s var(--ease);
}
.lang-btn.is-active { background: var(--blue-900); color: #fff; }

/* ==========================================================================
   HERO
   ========================================================================== */
.hero {
  max-width: var(--container); margin: 0 auto;
  min-height: 100vh; box-sizing: border-box;
  padding: 140px 32px 80px;
  display: flex; flex-direction: column; justify-content: center; align-items: center;
  text-align: center;
}
.hero-inner { max-width: 820px; display: flex; flex-direction: column; align-items: center; }
.hero h1 {
  font-size: clamp(44px, 7.5vw, 84px); margin-bottom: 28px;
}
.hero-lead {
  font-size: 19px; color: var(--ink-soft); max-width: 580px; margin-bottom: 40px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; }

.hero-social { display: flex; gap: 22px; align-items: center; justify-content: center; margin-top: 36px; }
.hero-social-link {
  display: flex; color: var(--ink-soft);
  transition: transform .25s var(--ease), opacity .25s var(--ease);
}
.hero-social-link:hover { transform: translateY(-3px); opacity: .75; }
.hero-social-link--linkedin { color: #0A66C2; }
.hero-social-link--mail { color: #F2994A; }
.hero-social-link--instagram { color: #C13584; }
.hero-social-link--medium { color: #000; }

/* ==========================================================================
   ACM NEDİR — canlı, koyu bant
   ========================================================================== */
.acm-band {
  max-width: none; background: var(--blue-900); position: relative; overflow: hidden;
  padding: 0;
}
.acm-band-inner {
  max-width: var(--container); margin: 0 auto; padding: 120px 32px 64px;
  display: grid; grid-template-columns: 1.35fr 0.65fr; gap: 40px; align-items: center;
  position: relative;
}
.acm-band-text h2 {
  color: #fff; font-size: clamp(28px, 3.4vw, 38px); margin-bottom: 22px; max-width: 560px;
}
.acm-band-text p { color: rgba(255,255,255,0.62); font-size: 16px; margin-bottom: 16px; max-width: 560px; }
.acm-band-text p:last-child { margin-bottom: 0; }

.acm-logo-wrap {
  justify-self: end; position: relative;
  width: clamp(140px, 16vw, 220px); aspect-ratio: 1 / 1;
  display: flex; align-items: center; justify-content: center;
}
.acm-logo-wrap::before {
  content: ''; position: absolute; inset: -30%; border-radius: 50%;
  background: radial-gradient(circle, rgba(0,114,206,0.35), transparent 70%);
  pointer-events: none;
}
.acm-logo { position: relative; width: 100%; height: 100%; object-fit: contain; filter: drop-shadow(0 20px 40px rgba(0,0,0,0.35)); }

.acm-stats {
  max-width: var(--container); margin: 0 auto; padding: 40px 32px 100px;
  display: flex; gap: 56px; flex-wrap: wrap;
  border-top: 1px solid rgba(255,255,255,0.12);
}
.acm-stat { display: flex; flex-direction: column; gap: 6px; }
.acm-stat-num { font-family: var(--font-display); font-size: 34px; font-weight: 600; color: #fff; }
.acm-stat-label { font-size: 12.5px; color: rgba(255,255,255,0.55); text-transform: uppercase; letter-spacing: 0.08em; }

/* ==========================================================================
   SPLIT SECTIONS (Biz Kimiz)
   ========================================================================== */
.split {
  display: grid; grid-template-columns: 1.1fr 0.9fr; column-gap: 72px; row-gap: 0;
  grid-template-areas: "heading visual" "body visual";
  align-items: center;
}
.split.reverse { grid-template-areas: "visual heading" "visual body"; }
.split-heading { grid-area: heading; }
.split-body { grid-area: body; }
.split-visual { grid-area: visual; }

.split-heading h2 { font-size: clamp(28px, 3.4vw, 38px); margin-bottom: 0; }
.split-body { color: var(--ink-soft); font-size: 16px; margin-top: 20px; }
.split-body p { margin-bottom: 16px; }
.split-body p:last-child { margin-bottom: 0; }

.chapter-vitals { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; margin-top: 24px; }
.chapter-vitals-item { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius-md); padding: 14px 16px; }
.chapter-vitals-label { display: block; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-faint); margin-bottom: 4px; }
.chapter-vitals-value { font-size: 15px; font-weight: 600; color: var(--ink); }

.team-photo-frame {
  position: relative; width: 100%; aspect-ratio: 4 / 5;
  border-radius: var(--radius-lg); overflow: hidden;
  background: var(--blue-50); border: 1.5px dashed var(--line);
}
.team-photo-fallback {
  position: absolute; inset: 0; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 12px;
  color: var(--blue-400); text-align: center; padding: 24px;
}
.team-photo-fallback span { font-size: 14px; font-weight: 600; color: var(--ink-faint); }
.team-photo-frame img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }

/* ==========================================================================
   MISSION / VISION
   ========================================================================== */
.mv-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.mv-card {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 40px; transition: all .35s var(--ease);
}
.mv-card:hover { border-color: var(--blue-400); box-shadow: var(--shadow-md); transform: translateY(-4px); }
.mv-num { font-family: var(--font-display); font-size: 13px; color: var(--blue-500); text-transform: uppercase; letter-spacing: 0.12em; font-weight: 700; }
.mv-card h3 { font-size: 24px; margin: 14px 0 14px; }
.mv-card p { color: var(--ink-soft); font-size: 15.5px; }

/* ==========================================================================
   BOARD — danışman kartı + kişi kartları
   ========================================================================== */
.tiny-label { display: block; font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; color: var(--blue-400); margin-bottom: 8px; }

.sponsor-card {
  display: flex; gap: 40px;
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 36px; margin-bottom: 36px; box-shadow: var(--shadow-sm);
}
.sponsor-photo {
  position: relative; width: 210px; aspect-ratio: 4 / 5; flex-shrink: 0;
  border-radius: var(--radius-md); overflow: hidden;
  background: linear-gradient(135deg, var(--blue-500), var(--blue-900));
}
.sponsor-photo .initials {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-weight: 600; font-size: 44px; color: rgba(255,255,255,0.9);
}
.sponsor-photo img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }

.sponsor-body { display: flex; flex-wrap: wrap; gap: 36px; flex: 1; }
.sponsor-main { flex: 1 1 240px; }
.sponsor-name { font-size: 24px; margin: 0 0 4px; }
.sponsor-main .person-role { display: block; margin-bottom: 4px; color: var(--blue-600); }
.sponsor-main .person-links { margin-top: 16px; padding-top: 0; border-top: none; }

.sponsor-focus { flex: 1 1 260px; padding-left: 36px; border-left: 1px solid var(--line); }
.sponsor-focus p { font-size: 14.5px; color: var(--ink-soft); line-height: 1.6; margin-top: 4px; }

/* Brand-colored icon links (LinkedIn / mail / GitHub / Medium) — bare icons, no box */
.person-links a.person-link--linkedin { color: #0A66C2; }
.person-links a.person-link--mail { color: #F2994A; }
.person-links a.person-link--github { color: rgba(255,255,255,0.85); }
.person-links a.person-link--medium { color: rgba(255,255,255,0.85); }
.sponsor-main .person-links a.person-link--github { color: var(--ink-soft); }
.sponsor-main .person-links a.person-link--medium { color: var(--ink-soft); }

.people-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 340px));
  justify-content: center; gap: 30px; margin-bottom: 30px;
}
.people-grid:last-child { margin-bottom: 0; }

.person-card {
  border-radius: var(--radius-lg); overflow: hidden;
  background: var(--blue-900); box-shadow: var(--shadow-sm);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.person-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }

.person-photo {
  position: relative; width: 100%; aspect-ratio: 4 / 5;
  background: linear-gradient(135deg, var(--blue-500), var(--blue-900));
}
.person-photo .initials {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-weight: 600; font-size: 40px; color: rgba(255,255,255,0.9);
}
.person-photo img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }

.person-info { padding: 18px 20px 20px; }
.person-name { font-size: 16.5px; margin-bottom: 3px; color: #fff; }
.person-role { display: block; font-size: 12.5px; font-weight: 600; color: var(--blue-100); }
.person-links {
  display: flex; gap: 16px; align-items: center; margin-top: 15px; padding-top: 15px;
  border-top: 1px solid rgba(255,255,255,0.14);
}
.person-links a {
  display: flex; color: rgba(255,255,255,0.8);
  transition: transform .2s var(--ease), opacity .2s var(--ease);
}
.person-links a:hover { transform: translateY(-2px); opacity: .75; }

/* ==========================================================================
   EMPTY STATE (Etkinlikler)
   ========================================================================== */
.empty-state {
  border: 1.5px dashed var(--line); border-radius: var(--radius-lg);
  padding: 64px 32px; text-align: center; display: flex; flex-direction: column;
  align-items: center; gap: 14px; color: var(--ink-faint);
}
.empty-state svg { color: var(--blue-400); margin-bottom: 6px; }
.empty-state p { font-size: 16px; font-weight: 600; color: var(--ink-soft); }

/* ==========================================================================
   BLOG (Medium yazıları)
   ========================================================================== */
.blog-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.blog-card {
  display: flex; flex-direction: column;
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius-lg);
  overflow: hidden; transition: all .3s var(--ease);
}
.blog-card:hover { border-color: var(--blue-400); box-shadow: var(--shadow-md); transform: translateY(-4px); }
.blog-card-cover { aspect-ratio: 16 / 9; overflow: hidden; background: var(--blue-50); }
.blog-card-cover img { width: 100%; height: 100%; object-fit: cover; display: block; }
.blog-card-body { padding: 26px 26px 28px; display: flex; flex-direction: column; gap: 14px; flex: 1; }
.blog-card-body h3 { font-size: 19px; }
.blog-card-body p {
  font-size: 14.5px; color: var(--ink-soft);
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.blog-card-meta { display: flex; align-items: center; gap: 10px; margin-top: auto; }
.blog-card-avatar { width: 34px; height: 34px; border-radius: 50%; object-fit: cover; flex-shrink: 0; }
.blog-card-meta-text { display: flex; flex-direction: column; line-height: 1.35; }
.blog-card-author { font-size: 13.5px; font-weight: 600; color: var(--ink); }
.blog-card-date { font-size: 12px; color: var(--ink-faint); }
.blog-card-body .btn { align-self: flex-start; }

/* Etkinlik kartları (blog-card üzerine) */
.event-card-cover { aspect-ratio: 4 / 5; }
.event-card .blog-card-body p { -webkit-line-clamp: unset; }
.event-card .blog-card-body .btn { margin-top: auto; }
.event-card-meta { display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: 13.5px; font-weight: 600; color: var(--blue-600); }
.event-card-meta li { display: inline-flex; align-items: center; gap: 6px; }

/* ==========================================================================
   JOIN (Üye Ol)
   ========================================================================== */
.join {
  max-width: none; background: var(--blue-900); position: relative; overflow: hidden;
}
.join::before {
  content: ''; position: absolute; width: 500px; height: 500px; border-radius: 50%;
  background: radial-gradient(circle, rgba(0,114,206,0.4), transparent 70%);
  top: -200px; right: -100px; pointer-events: none;
}
.join-inner {
  max-width: 640px; margin: 0 auto; padding: 100px 32px; text-align: center;
  position: relative;
}
.join-inner h2 { color: #fff; font-size: clamp(28px, 4vw, 40px); margin-bottom: 18px; }
.join-inner p { color: rgba(255,255,255,0.68); font-size: 16.5px; max-width: 520px; margin: 0 auto 40px; }

.join-steps {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
  max-width: 480px; margin: 0 auto 48px;
}
.join-step {
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  font-size: 13px; font-weight: 600; line-height: 1.4;
  color: rgba(255,255,255,0.85); text-align: center;
}
.join-step-num {
  width: 32px; height: 32px; border-radius: 50%; border: 1px solid rgba(255,255,255,0.3);
  display: flex; align-items: center; justify-content: center; font-size: 12px; color: #fff;
  font-family: var(--font-display); flex-shrink: 0;
}

.join-form {
  display: flex; flex-direction: column; gap: 14px;
  max-width: 420px; margin: 0 auto; text-align: left;
}
.join-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.join-form label {
  display: flex; flex-direction: column; gap: 7px;
  font-size: 12.5px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em;
  color: rgba(255,255,255,0.55);
}
.join-form input {
  font-family: var(--font-body); font-size: 14.5px; font-weight: 500; color: #fff;
  background: rgba(255,255,255,0.07); border: 1px solid rgba(255,255,255,0.18);
  border-radius: 10px; padding: 12px 14px; transition: border-color .2s var(--ease);
}
.join-form input::placeholder { color: rgba(255,255,255,0.35); }
.join-form input:focus { outline: none; border-color: var(--blue-400); }
.join-form .btn { align-self: flex-start; margin-top: 6px; }

.join-divider {
  display: flex; align-items: center; gap: 14px;
  max-width: 420px; margin: 32px auto; color: rgba(255,255,255,0.4);
  font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em;
}
.join-divider::before, .join-divider::after {
  content: ''; flex: 1; height: 1px; background: rgba(255,255,255,0.15);
}

/* ==========================================================================
   CONTACT
   ========================================================================== */
.contact-info { display: flex; flex-direction: column; gap: 32px; }
.contact-block { max-width: 480px; }
.contact-big-link {
  display: inline-flex; align-items: center; gap: 12px;
  font-family: var(--font-display); font-size: clamp(26px, 3.4vw, 38px); font-weight: 600;
  color: var(--blue-900); transition: color .25s var(--ease);
}
.contact-big-link svg { flex-shrink: 0; color: var(--blue-500); transition: transform .25s var(--ease); }
.contact-big-link:hover { color: var(--blue-500); }
.contact-big-link:hover svg { transform: translate(2px, -2px); }
.contact-address { font-size: 16px; color: var(--ink-soft); margin-top: 8px; }

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer { background: var(--blue-900); color: #fff; }
.footer-inner {
  max-width: var(--container); margin: 0 auto; padding: 48px 32px;
  display: flex; justify-content: space-between; align-items: center; gap: 40px; flex-wrap: wrap;
}
.footer-brand { display: flex; align-items: center; gap: 24px; }
.footer-logo-acm { height: 100px; width: auto; flex-shrink: 0; }
.footer-divider { width: 1px; height: 90px; background: rgba(255,255,255,0.22); flex-shrink: 0; }
.footer-logo { height: 220px; width: auto; flex-shrink: 0; }
.footer-links { display: flex; flex-wrap: wrap; gap: 24px; }
.footer-links a { font-size: 14px; color: rgba(255,255,255,0.7); transition: color .25s var(--ease); }
.footer-links a:hover { color: #fff; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  max-width: var(--container); margin: 0 auto; padding: 22px 32px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
  font-size: 12.5px; color: rgba(255,255,255,0.4);
}

/* ==========================================================================
   SCROLL REVEAL
   ========================================================================== */
[data-reveal] {
  opacity: 0; transform: translateY(22px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 980px) {
  .split {
    grid-template-columns: 1fr; row-gap: 24px;
    grid-template-areas: "heading" "visual" "body";
  }
  .split.reverse { grid-template-areas: "heading" "visual" "body"; }
  .split-visual { width: 220px; margin: 0 auto; }
  .split-body { margin-top: 0; }
  .mv-grid { grid-template-columns: 1fr; }
  .acm-band-inner { grid-template-columns: 1fr; }
  .acm-logo-wrap { justify-self: center; order: -1; }
  .quicklinks-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .nav-toggle { display: flex; }
  .nav-menu {
    position: fixed; inset: 0; top: 0; height: 100vh; background: var(--bg-page);
    flex-direction: column; justify-content: center; align-items: flex-start;
    padding: 32px; gap: 32px;
    transform: translateX(100%); transition: transform .4s var(--ease);
  }
  .nav-menu.is-open { transform: translateX(0); }
  .nav-menu > ul { flex-direction: column; align-items: flex-start; gap: 22px; }
  .nav-link { font-size: 20px; }
  .dropdown { display: none; }
  .nav-link .chev { display: none; }
  .btn-nav { margin-top: 12px; }

  .hero { padding: 130px 24px 60px; }
  .section, .section-intro { padding-left: 24px; padding-right: 24px; }
  .section { padding-top: 80px; padding-bottom: 80px; }
  .section-intro--top, .section--top { padding-top: 130px; }
  .acm-band-inner { padding: 90px 24px 48px; }
  .acm-stats { padding: 32px 24px 72px; gap: 32px; }

  .quicklinks-grid { grid-template-columns: 1fr; }
  .blog-grid { grid-template-columns: 1fr; }
  .home-events-grid { grid-template-columns: 1fr; }

  .people-grid { grid-template-columns: repeat(auto-fit, minmax(150px, 220px)); gap: 16px; }
  .join-form-row { grid-template-columns: 1fr; }
  .sponsor-card { flex-direction: column; }
  .sponsor-photo { width: 140px; }
  .sponsor-focus { padding-left: 0; border-left: none; border-top: 1px solid var(--line); padding-top: 20px; }
  .footer-inner { flex-direction: column; }
  .footer-brand { flex-wrap: wrap; gap: 16px; }
  .footer-logo-acm { height: 56px; }
  .footer-divider { height: 50px; }
  .footer-logo { height: 110px; }
  .lang-toggle { margin: 8px 0; }
}