:root {
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --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;
  --radius-sm: 0.5rem; --radius-md: 0.9rem; --radius-lg: 1.25rem; --radius-xl: 1.8rem; --radius-full: 9999px;
  --color-bg: #ffffff;
  --color-surface: rgba(255,255,255,0.76);
  --color-surface-2: rgba(255,255,255,0.88);
  --color-border: rgba(17,24,39,0.08);
  --color-divider: rgba(17,24,39,0.06);
  --color-text: #111827;
  --color-text-muted: #5b6473;
  --color-primary: #2f6bff;
  --color-primary-soft: #eaf1ff;
  --shadow-sm: 0 8px 24px rgba(31, 41, 55, 0.06);
  --shadow-lg: 0 18px 50px rgba(31, 41, 55, 0.10);
  --font-display: 'Fraunces', Georgia, serif;
  --font-body: 'Plus Jakarta Sans', Arial, sans-serif;
  --content-wide: 1180px;
  --transition: 220ms cubic-bezier(.16,1,.3,1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background:
    radial-gradient(circle at top left, rgba(110, 168, 255, 0.18), transparent 28%),
    radial-gradient(circle at 85% 15%, rgba(78, 205, 196, 0.16), transparent 26%),
    radial-gradient(circle at 20% 85%, rgba(255, 184, 108, 0.14), transparent 22%),
    linear-gradient(180deg, #ffffff 0%, #f8fbff 38%, #ffffff 100%);
  line-height: 1.65;
}

img, svg { display:block; max-width:100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }

.page-shell {
  width: min(calc(100% - 2rem), var(--content-wide));
  margin: 0 auto;
}

.skip-link {
  position:absolute; left:-9999px; top:auto;
}
.skip-link:focus {
  left:1rem; top:1rem; background:#fff; padding:.75rem 1rem;
  border-radius:var(--radius-md); z-index:100;
}

/* HEADER & NAV – FIXED */

header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 80;
  padding: var(--space-4) 0; /* jangan terlalu besar supaya tinggi header stabil */
  background: transparent;    /* biarkan .nav yang punya background */
}

.nav {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:var(--space-4);
  padding: var(--space-3) var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow-sm);
}

.brand {
  display:flex; align-items:center; gap:var(--space-3);
  min-width:0;
}

.brand-mark {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  border-radius: 16px;
  overflow: hidden;
  flex-shrink: 0;
  border:1px solid rgba(47,107,255,.12);
}

.logo-kampus {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.brand-text strong {
  display:block; font-size:var(--text-sm); letter-spacing:.04em;
  text-transform:uppercase; color:#2b4aa8;
}
.brand-text span {
  display:block; font-size:var(--text-xs); color:var(--color-text-muted);
}

.nav-links {
  display:flex; gap:var(--space-4); flex-wrap:wrap; justify-content:flex-end;
  font-size:var(--text-sm); color:var(--color-text-muted);
}

.nav-links a:hover,
.nav-links a:focus-visible { color: var(--color-primary); }

/* OFFSET KONTEN AGAR TIDAK TERTUTUP HEADER */
main {
  padding-top: 60px; /* sesuaikan jika header diubah; ini asumsi header +-120–130px */
  padding-bottom: var(--space-20);
}

/* HERO */

.hero {
  padding: clamp(var(--space-10), 8vw, var(--space-20)) 0 var(--space-12);
  display:grid; grid-template-columns: 1.2fr .8fr; gap:var(--space-8); align-items:center;
}

.eyebrow {
  display:inline-flex; align-items:center; gap:.55rem;
  padding:.55rem .9rem; border-radius:var(--radius-full);
  background: rgba(255,255,255,.8); border:1px solid rgba(47,107,255,.10);
  color:#2b4aa8; font-size:var(--text-sm); font-weight:600;
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-5);
}

h1 {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6vw, 5.7rem);
  line-height: 1.02;
  letter-spacing: -0.04em;
  max-width: 10ch;
}

.hero p {
  margin-top: var(--space-5);
  max-width: 60ch;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.hero-actions {
  margin-top: var(--space-6);
  display:flex; flex-wrap:wrap; gap:var(--space-3);
}

.btn {
  display:inline-flex; align-items:center; justify-content:center; gap:.6rem;
  min-height:48px; padding: .95rem 1.25rem;
  border-radius: var(--radius-full);
  border:1px solid transparent;
  transition: transform var(--transition), box-shadow var(--transition),
              background var(--transition), border-color var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, #2f6bff, #4b8dff);
  color:#fff; box-shadow: 0 12px 30px rgba(47,107,255,.22);
}
.btn-secondary {
  background: rgba(255,255,255,.82);
  border-color: rgba(17,24,39,.08);
  color: var(--color-text);
}
.btn:hover { transform: translateY(-2px); }

/* HERO CARD */

.hero-card {
  position:relative;
  padding: var(--space-6);
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(255,255,255,.92), rgba(255,255,255,.72));
  border:1px solid rgba(17,24,39,.08);
  box-shadow: var(--shadow-lg);
  overflow:hidden;
  isolation:isolate;
}

.hero-card::before,
.hero-card::after {
  content:""; position:absolute; border-radius:50%; filter: blur(8px); z-index:-1;
}
.hero-card::before {
  width:190px; height:190px; right:-30px; top:-30px;
  background: radial-gradient(circle, rgba(47,107,255,.18), transparent 70%);
}
.hero-card::after {
  width:170px; height:170px; left:-20px; bottom:-30px;
  background: radial-gradient(circle, rgba(78,205,196,.15), transparent 70%);
}

.hero-stats {
  display:grid; grid-template-columns: repeat(2, 1fr); gap:var(--space-4);
  margin-top: var(--space-5);
}

.stat {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,.62);
  border: 1px solid rgba(17,24,39,.06);
}

.stat strong {
  display:block; font-size: var(--text-xl); font-weight:800; color:#17337f;
}
.stat span { color: var(--color-text-muted); font-size: var(--text-sm); }

/* SECTION & PROGRAM GRID */

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

.section-head h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  line-height: 1.08;
  letter-spacing: -0.03em;
  max-width: 11ch;
}

.section-head p {
  max-width: 56ch; color: var(--color-text-muted);
}

.program-grid {
  display:grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: var(--space-5);
}

.program-card-link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.program-card {
  position:relative;
  padding: var(--space-6);
  border-radius: 26px;
  border:1px solid rgba(17,24,39,.07);
  background: linear-gradient(180deg, rgba(255,255,255,.95), rgba(255,255,255,.8));
  box-shadow: var(--shadow-sm);
  overflow:hidden;
  min-height: 260px;
  display:flex; flex-direction:column;
  justify-content:space-between;
  transition: transform var(--transition), box-shadow var(--transition),
              border-color var(--transition);
  cursor: pointer;
}

.program-card-link:hover .program-card,
.program-card-link:focus-visible .program-card {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(47,107,255,.14);
}

.program-card::before {
  content:""; position:absolute; inset:auto auto -42px -42px; width:140px; height:140px; border-radius:50%;
  background: var(--accent-gradient);
  opacity:.24;
  filter: blur(4px);
}

.program-top {
  display:flex; justify-content:space-between; gap:var(--space-3); align-items:flex-start;
}

.program-badge {
  display:inline-flex; align-items:center; justify-content:center;
  width:52px; height:52px; border-radius:18px;
  background: rgba(255,255,255,.78);
  border:1px solid rgba(17,24,39,.06);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.55);
  font-weight:800;
  color:#1d356b;
}

.program-level {
  font-size: var(--text-xs);
  letter-spacing: .12em;
  text-transform: uppercase;
  color:#3855a8;
  font-weight:700;
  margin-bottom: var(--space-3);
}

.program-card h3 {
  font-size: var(--text-xl);
  line-height: 1.1;
  margin-bottom: var(--space-3);
}

.program-card p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  max-width: 34ch;
}

.program-link {
  margin-top: var(--space-6);
  display:inline-flex; align-items:center; gap:.55rem;
  font-weight:700; color:#1f4ed8;
}

/* HIGHLIGHT */

.highlight {
  margin-top: var(--space-16);
  display:grid; grid-template-columns: 1fr 1fr; gap:var(--space-5);
}

.highlight-card {
  padding: var(--space-6);
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(255,255,255,.95), rgba(248,251,255,.82));
  border:1px solid rgba(17,24,39,.07);
  box-shadow: var(--shadow-sm);
}

.pill-list {
  display:flex; flex-wrap:wrap; gap: var(--space-3);
  margin-top: var(--space-5);
}

.pill {
  padding: .8rem 1rem;
  border-radius: var(--radius-full);
  background: rgba(255,255,255,.84);
  border: 1px solid rgba(17,24,39,.06);
  font-size: var(--text-sm);
  color:#334155;
}

/* FOOTER */

footer {
  padding: var(--space-8) 0 var(--space-16);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

/* RESPONSIVE */

@media (max-width: 960px) {
  .hero,
  .highlight,
  .section-head {
    grid-template-columns: 1fr;
    display:grid;
  }
  .program-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  h1 { max-width: 12ch; }
}

@media (max-width: 680px) {
  .page-shell { width: min(calc(100% - 1rem), var(--content-wide)); }
  .nav { flex-direction:column; align-items:flex-start; }
  .nav-links { justify-content:flex-start; }
  .program-grid, .hero-stats { grid-template-columns: 1fr; }
  .hero-card, .program-card, .highlight-card { border-radius: 22px; }
  h1 { font-size: clamp(2.3rem, 12vw, 3.6rem); }
  .section-head h2 { max-width:none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition:none !important; animation:none !important; }
}