/* ==========================================================================
   A.I.S.C Space Exploration Technologies — Design System
   ========================================================================== */

@font-face {
  font-family: "Nasalization";
  src: url("../fonts/nasalizationrg.otf") format("opentype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

:root {
  /* Surfaces */
  --bg: #05070f;
  --bg-soft: #070c18;
  --panel: #0c1428;
  --panel-2: #101c38;
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);

  /* Text */
  --text: #eef2fb;
  --text-muted: #9fabc4;
  --text-faint: #6b7893;

  /* Brand accents */
  --cyan: #49d3ff;
  --cyan-dim: #1f8fc2;
  --gold: #f0a83d;
  --gold-dim: #b97a24;

  /* Gradients */
  --grad-hero: linear-gradient(180deg, rgba(5, 7, 15, 0.35) 0%, rgba(5, 7, 15, 0.55) 45%, #05070f 100%);
  --grad-panel: linear-gradient(160deg, #0c1428 0%, #080e1c 100%);
  --grad-accent: linear-gradient(90deg, var(--cyan) 0%, #7fe3ff 100%);

  /* Type */
  --font-display: "Nasalization", "Eurostile", "Segoe UI", sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Layout */
  --container: 1180px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --shadow-soft: 0 20px 50px -20px rgba(0, 0, 0, 0.6);
}

/* ---------- Reset ---------- */
* , *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4 { margin: 0 0 .6em; font-weight: 400; line-height: 1.15; letter-spacing: .01em; }
p { margin: 0 0 1em; color: var(--text-muted); }
button { font-family: inherit; cursor: pointer; }

.font-display { font-family: var(--font-display); }

/* ---------- Background texture ---------- */
body {
  background-image:
    radial-gradient(ellipse 900px 500px at 15% -10%, rgba(73, 211, 255, 0.10), transparent 60%),
    radial-gradient(ellipse 700px 500px at 90% 10%, rgba(240, 168, 61, 0.07), transparent 55%),
    var(--bg);
  background-attachment: fixed;
}

/* ---------- Container / Section ---------- */
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; position: relative; }
.section--tight { padding: 64px 0; }
.section--alt { background: var(--bg-soft); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 18px;
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--cyan);
  display: inline-block;
}

.section-head { max-width: 680px; margin-bottom: 56px; }
.section-head h2 { font-size: clamp(28px, 3.6vw, 42px); }
.section-head p { font-size: 17px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head.center .eyebrow { justify-content: center; }
.section-head.center .eyebrow::before { display: none; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: .1em;
  text-transform: uppercase;
  border: 1px solid transparent;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease, border-color .25s ease, color .25s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: var(--grad-accent);
  color: #06111c;
  box-shadow: 0 10px 30px -8px rgba(73, 211, 255, 0.55);
}
.btn-primary:hover { box-shadow: 0 16px 36px -10px rgba(73, 211, 255, 0.7); }
.btn-ghost {
  background: rgba(255,255,255,0.03);
  color: var(--text);
  border-color: var(--border-strong);
  backdrop-filter: blur(6px);
}
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); }
.btn-gold {
  background: linear-gradient(90deg, var(--gold), #ffcf80);
  color: #241503;
  box-shadow: 0 10px 30px -8px rgba(240, 168, 61, 0.5);
}
.btn-sm { padding: 10px 20px; font-size: 11px; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 18px 0;
  transition: background .3s ease, padding .3s ease, border-color .3s ease;
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: rgba(5, 7, 15, 0.86);
  backdrop-filter: blur(14px);
  padding: 12px 0;
  border-color: var(--border);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; gap: 24px; }

.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 40px; height: 40px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(160deg, var(--panel-2), var(--panel));
  border: 1px solid var(--border-strong);
  flex: none;
}
.brand-mark svg { width: 22px; height: 22px; }
.brand-word { font-family: var(--font-display); font-size: 19px; letter-spacing: .16em; line-height: 1; }
.brand-sub { display: block; font-family: var(--font-body); font-size: 9.5px; letter-spacing: .22em; color: var(--text-faint); margin-top: 4px; text-transform: uppercase; }

.brand-logo { height: 40px; width: auto; display: block; }
.footer-brand .brand-logo { height: 44px; }

.nav-links { display: flex; align-items: center; gap: 8px; }
.nav-links a {
  font-family: var(--font-display);
  font-size: 12.5px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 10px 16px;
  border-radius: 999px;
  transition: color .2s ease, background .2s ease;
}
.nav-links a:hover { color: var(--text); background: rgba(255,255,255,0.05); }
.nav-links a.active { color: var(--bg); background: var(--grad-accent); }

.lang-switch {
  display: flex; align-items: center;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 3px;
  gap: 2px;
  flex: none;
}
.lang-switch a {
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: .08em;
  padding: 6px 12px;
  border-radius: 999px;
  color: var(--text-faint);
  transition: color .2s ease, background .2s ease;
}
.lang-switch a:hover { color: var(--text); }
.lang-switch a.is-active { color: var(--bg); background: var(--grad-accent); }

.nav-cta { display: flex; align-items: center; gap: 14px; }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  padding: 10px;
}
.nav-toggle span { width: 20px; height: 2px; background: var(--text); display: block; transition: transform .25s ease, opacity .25s ease; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 120px;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center 62%;
  z-index: 0;
}
.hero-bg::after {
  content: "";
  position: absolute; inset: 0;
  background: var(--grad-hero);
}
.hero-inner { position: relative; z-index: 2; max-width: 760px; }
.hero-inner h1 {
  font-family: var(--font-display);
  font-size: clamp(34px, 5.4vw, 62px);
  line-height: 1.08;
  margin-bottom: 26px;
}
.hero-inner h1 .accent { color: var(--cyan); }
.hero-inner .lead { font-size: 18px; max-width: 560px; color: #cdd6ea; }
.hero-actions { display: flex; gap: 16px; margin-top: 38px; flex-wrap: wrap; }

.hero-scroll {
  position: absolute; bottom: 34px; left: 50%; transform: translateX(-50%);
  z-index: 2;
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  font-family: var(--font-display);
  font-size: 10px; letter-spacing: .3em; text-transform: uppercase;
  color: var(--text-faint);
}
.hero-scroll .line { width: 1px; height: 34px; background: linear-gradient(var(--cyan), transparent); animation: scrollpulse 2s ease-in-out infinite; }
@keyframes scrollpulse { 0%,100% { opacity: .3; } 50% { opacity: 1; } }

/* Page header (non-home hero) */
.page-hero {
  position: relative;
  padding: 190px 0 90px;
  overflow: hidden;
}
.page-hero .hero-bg { background-position: center 55%; }
.page-hero-inner { position: relative; z-index: 2; max-width: 700px; }
.page-hero h1 { font-family: var(--font-display); font-size: clamp(30px, 4.4vw, 46px); }
.breadcrumb { font-size: 12px; letter-spacing: .18em; text-transform: uppercase; color: var(--text-faint); margin-bottom: 18px; }
.breadcrumb .sep { margin: 0 8px; color: var(--cyan); }

/* ---------- Stats ---------- */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: -78px;
  position: relative;
  z-index: 5;
}
.stat-cell { background: var(--panel); padding: 34px 28px; }
.stat-cell .num { font-family: var(--font-display); font-size: clamp(22px, 2.6vw, 30px); color: var(--cyan); display: block; margin-bottom: 6px; }
.stat-cell .label { font-size: 13px; color: var(--text-muted); }

/* ---------- Cards ---------- */
.grid { display: grid; gap: 26px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--grad-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 34px 30px;
  transition: border-color .25s ease, transform .25s ease, box-shadow .25s ease;
  position: relative;
}
.card:hover { border-color: var(--border-strong); transform: translateY(-4px); box-shadow: var(--shadow-soft); }
.card-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(73, 211, 255, 0.08);
  border: 1px solid rgba(73, 211, 255, 0.25);
  margin-bottom: 22px;
}
.card-icon svg { width: 26px; height: 26px; stroke: var(--cyan); }
.card h3 { font-family: var(--font-display); font-size: 17px; letter-spacing: .02em; margin-bottom: 12px; }
.card p { font-size: 14.5px; margin-bottom: 0; }
.card .tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 10px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 14px;
}

/* Split section */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.split-media { position: relative; border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--border); }
.split-media img { width: 100%; height: 100%; object-fit: cover; min-height: 360px; }
.split-media::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(5,7,15,0.7) 100%);
  pointer-events: none;
}
.split-media .frame-tag {
  position: absolute; top: 18px; left: 18px; z-index: 2;
  font-family: var(--font-display);
  font-size: 10px; letter-spacing: .2em; text-transform: uppercase;
  padding: 8px 14px;
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 999px;
  background: rgba(5,7,15,0.5);
  backdrop-filter: blur(6px);
}
.split-body h2 { font-family: var(--font-display); font-size: clamp(26px, 3.2vw, 36px); }
.split.reverse { direction: rtl; }
.split.reverse > * { direction: ltr; }

.checklist { margin-top: 24px; display: flex; flex-direction: column; gap: 14px; }
.checklist li { display: flex; gap: 14px; align-items: flex-start; font-size: 14.5px; color: var(--text-muted); }
.checklist .dot {
  flex: none; width: 22px; height: 22px; border-radius: 50%;
  border: 1px solid rgba(73,211,255,0.4);
  background: rgba(73,211,255,0.08);
  display: flex; align-items: center; justify-content: center;
  margin-top: 1px;
}
.checklist .dot::after { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); }

/* ---------- Timeline / activities list ---------- */
.activity-groups { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; margin-top: 10px; }
.activity-group {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 26px 28px;
  background: rgba(255,255,255,0.015);
}
.activity-group h4 {
  font-family: var(--font-display);
  font-size: 14px; letter-spacing: .06em;
  color: var(--cyan);
  margin-bottom: 16px;
  display: flex; align-items: center; gap: 10px;
}
.activity-group h4::before { content: ""; width: 8px; height: 8px; background: var(--cyan); border-radius: 2px; display: inline-block; }
.activity-group ul { display: flex; flex-direction: column; gap: 10px; }
.activity-group li { font-size: 14px; color: var(--text-muted); padding-left: 18px; position: relative; }
.activity-group li::before { content: "—"; position: absolute; left: 0; color: var(--text-faint); }

/* ---------- Values ---------- */
.values-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.value-item { text-align: center; padding: 10px; }
.value-item .num { font-family: var(--font-display); font-size: 34px; color: rgba(255,255,255,0.14); display: block; margin-bottom: 10px; }
.value-item h4 { font-family: var(--font-display); font-size: 15px; margin-bottom: 10px; }
.value-item p { font-size: 13.5px; }

/* ---------- Partners ---------- */
.partners-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.partner-card {
  display: flex;
  align-items: center;
  gap: 30px;
  background: var(--grad-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 34px;
  transition: border-color .25s ease, transform .25s ease;
}
.partner-card:hover { border-color: var(--border-strong); transform: translateY(-4px); }
.partner-logo {
  flex: none;
  width: 132px; height: 110px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
}
.partner-logo img { max-width: 88px; max-height: 78px; object-fit: contain; }
.partner-body .tag { margin-bottom: 10px; }
.partner-body h3 { font-family: var(--font-display); font-size: 17px; margin-bottom: 10px; }
.partner-body p { font-size: 14px; margin-bottom: 0; }

/* ---------- Team ---------- */
.team-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.team-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--grad-panel);
  transition: transform .25s ease, border-color .25s ease;
}
.team-card:hover { transform: translateY(-4px); border-color: var(--border-strong); }
.team-avatar {
  height: 380px;
  display: flex; align-items: center; justify-content: center;
  background: radial-gradient(circle at 30% 20%, rgba(73,211,255,0.16), transparent 60%), var(--panel-2);
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.team-avatar::before {
  content: "";
  position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 16px 16px;
  opacity: .5;
}
.team-avatar .photo {
  position: relative; z-index: 1;
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center 22%;
}
.team-avatar .initials {
  font-family: var(--font-display);
  font-size: 56px;
  letter-spacing: .06em;
  color: var(--text);
  position: relative; z-index: 1;
  width: 136px; height: 136px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  border: 1px solid rgba(73,211,255,0.4);
  background: rgba(5,7,15,0.55);
}
.team-body { padding: 26px 26px 30px; }
.team-role { font-family: var(--font-display); font-size: 11px; letter-spacing: .16em; text-transform: uppercase; color: var(--gold); margin-bottom: 8px; }
.team-body h3 { font-family: var(--font-display); font-size: 19px; margin-bottom: 10px; }
.team-body p { font-size: 13.5px; margin-bottom: 16px; }
.team-contact { display: flex; flex-direction: column; gap: 8px; font-size: 13px; color: var(--text-muted); }
.team-contact a { display: flex; align-items: center; gap: 10px; transition: color .2s ease; }
.team-contact a:hover { color: var(--cyan); }
.team-contact svg { width: 15px; height: 15px; stroke: var(--cyan); flex: none; }

/* ---------- Media banner (full-bleed image with caption) ---------- */
.media-banner {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  min-height: 420px;
  display: flex;
  align-items: flex-end;
}
.media-banner img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
}
.media-banner::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(0deg, rgba(5,7,15,0.92) 0%, rgba(5,7,15,0.35) 45%, rgba(5,7,15,0.05) 100%);
}
.media-banner-body {
  position: relative; z-index: 2;
  padding: 44px 46px;
  max-width: 620px;
}
.media-banner-body .eyebrow { margin-bottom: 14px; }
.media-banner-body h2 { font-family: var(--font-display); font-size: clamp(22px, 2.6vw, 30px); }
.media-banner-body p { font-size: 15px; margin-bottom: 0; }

/* ---------- CTA banner ---------- */
.cta-banner {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-strong);
  padding: 64px 56px;
  background: linear-gradient(120deg, rgba(73,211,255,0.10), rgba(240,168,61,0.06)), var(--panel);
  display: flex; align-items: center; justify-content: space-between; gap: 40px;
  flex-wrap: wrap;
  position: relative;
  overflow: hidden;
}
.cta-banner h2 { font-family: var(--font-display); font-size: clamp(24px, 3vw, 32px); margin-bottom: 10px; max-width: 520px; }
.cta-banner p { margin-bottom: 0; max-width: 480px; }
.cta-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- Contact page ---------- */
.contact-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 48px; align-items: start; }
.contact-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 34px;
  background: var(--grad-panel);
}
.contact-list { display: flex; flex-direction: column; gap: 22px; margin-top: 22px; }
.contact-list .item { display: flex; gap: 16px; }
.contact-list .icon {
  width: 44px; height: 44px; flex: none;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(73,211,255,0.08);
  border: 1px solid rgba(73,211,255,0.25);
}
.contact-list .icon svg { width: 20px; height: 20px; stroke: var(--cyan); }
.contact-list .label { font-family: var(--font-display); font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--text-faint); margin-bottom: 4px; }
.contact-list .value { font-size: 15px; color: var(--text); }
.contact-list .value a:hover { color: var(--cyan); }
.contact-list .value small { display: block; font-size: 13px; color: var(--text-muted); margin-top: 2px; }

.contact-people { margin-top: 30px; padding-top: 26px; border-top: 1px solid var(--border); display: flex; flex-direction: column; gap: 16px; }
.contact-people .person { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; font-size: 14px; flex-wrap: wrap; }
.contact-people .person .name { color: var(--text); }
.contact-people .person .role { color: var(--text-faint); font-size: 12px; }
.contact-people .person a { color: var(--cyan); white-space: nowrap; }

.form-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  background: var(--grad-panel);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 18px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field.full { grid-column: 1 / -1; }
.field label { font-family: var(--font-display); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--text-faint); }
.field input, .field select, .field textarea {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 13px 16px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 14.5px;
  transition: border-color .2s ease, background .2s ease;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--cyan); background: rgba(73,211,255,0.04);
}
.field textarea { resize: vertical; min-height: 120px; }
.form-note { font-size: 12.5px; color: var(--text-faint); margin-top: 14px; }
.form-status { font-size: 13.5px; margin-top: 14px; display: none; }
.form-status.show { display: block; }

.map-embed { border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--border); margin-top: 26px; filter: grayscale(.3) contrast(1.05); }
.map-embed iframe { width: 100%; height: 280px; border: 0; display: block; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); padding: 70px 0 30px; background: var(--bg-soft); }
.footer-top { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 56px; }
.footer-brand p { font-size: 13.5px; max-width: 300px; margin-top: 18px; }
.footer-col h5 { font-family: var(--font-display); font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--text-faint); margin-bottom: 18px; }
.footer-col ul { display: flex; flex-direction: column; gap: 11px; }
.footer-col a { font-size: 14px; color: var(--text-muted); transition: color .2s ease; }
.footer-col a:hover { color: var(--cyan); }
.footer-bottom {
  padding-top: 26px; border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap;
  font-size: 12.5px; color: var(--text-faint);
}
.social-row { display: flex; gap: 10px; }
.social-row a {
  width: 36px; height: 36px; border-radius: 50%;
  border: 1px solid var(--border-strong);
  display: flex; align-items: center; justify-content: center;
  transition: border-color .2s ease, color .2s ease;
}
.social-row a:hover { border-color: var(--cyan); color: var(--cyan); }
.social-row svg { width: 16px; height: 16px; }

/* ---------- Back to top ---------- */
.to-top {
  position: fixed; right: 26px; bottom: 26px; z-index: 90;
  width: 46px; height: 46px; border-radius: 50%;
  background: var(--panel); border: 1px solid var(--border-strong);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: opacity .25s ease, transform .25s ease, visibility .25s ease, border-color .2s ease;
}
.to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover { border-color: var(--cyan); }
.to-top svg { width: 18px; height: 18px; stroke: var(--cyan); }

/* ---------- Reveal animation ---------- */
[data-reveal] { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .split, .contact-grid { grid-template-columns: 1fr; }
  .split.reverse { direction: ltr; }
  .split-media img { min-height: 280px; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .activity-groups { grid-template-columns: 1fr; }
  .partners-grid { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: repeat(2, 1fr); }
  .team-grid { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; }
  .stats-bar { grid-template-columns: 1fr; margin-top: 40px; }
  .footer-top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .section { padding: 64px 0; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .partner-card { flex-direction: column; text-align: center; }
  .partner-card .tag { display: block; }
  .form-row { grid-template-columns: 1fr; }
  .cta-banner { padding: 42px 26px; flex-direction: column; align-items: flex-start; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 14px; }
  .page-hero { padding: 150px 0 60px; }
  .hero { min-height: 92vh; }
  .values-grid { grid-template-columns: 1fr; }

  /* Mobile nav panel */
  .nav-links {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 72px; left: 16px; right: 16px;
    background: rgba(7,12,24,0.98);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 14px;
    gap: 4px;
    opacity: 0; visibility: hidden; transform: translateY(-10px);
    transition: opacity .25s ease, transform .25s ease, visibility .25s ease;
    backdrop-filter: blur(16px);
  }
  .nav-links.open { opacity: 1; visibility: visible; transform: translateY(0); }
  .nav-links a { padding: 14px 16px; }
  .nav-cta .btn-ghost { display: none; }
}