/* ==========================================================================
   style.css — STEM Dwiwarna Hub
   Dipakai oleh SEMUA halaman (hub utama & tiap landing subdomain).
   Ubah warna/tipografi di :root SEKALI, otomatis berlaku di seluruh situs.
   ========================================================================== */

:root {
  --bg: #F6F5F1;
  --surface: #FFFFFF;
  --surface-dark: #0F1B2E;
  --ink: #14213D;
  --ink-soft: #3A4A66;
  --copper: #B5651D;
  --copper-light: #E0B68A;
  --green: #4F7942;
  --muted: #707B89;
  --border: rgba(20, 33, 61, 0.12);

  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Source Serif 4', Georgia, serif;
  --font-mono: 'IBM Plex Mono', monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
}

h1, h2, h3, .brand-name, .nav-link, .btn, .module-title, .eyebrow {
  font-family: var(--font-display);
}

a { text-decoration: none; color: inherit; }

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

:focus-visible {
  outline: 2px solid var(--copper);
  outline-offset: 2px;
}

/* ---------- Navigasi ---------- */
.site-nav { background: var(--surface); border-bottom: 1px solid var(--border); }
.site-nav .navbar { padding: 0.75rem 0; }

.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-name { font-size: 1.05rem; font-weight: 700; color: var(--ink); }
.brand-sub { font-family: var(--font-mono); font-size: 0.65rem; color: var(--muted); letter-spacing: 0.04em; text-transform: uppercase; }

.nav-link { color: var(--ink-soft) !important; font-weight: 500; font-size: 0.92rem; padding: 0.5rem 0.85rem !important; }
.nav-link.active { color: var(--ink) !important; border-bottom: 2px solid var(--copper); }
.nav-link:hover { color: var(--copper) !important; }
.nav-icon { font-size: 0.85em; margin-right: 0.25rem; color: var(--copper); }

.btn-cta {
  background: var(--ink); color: #fff !important; border-radius: 6px;
  padding: 0.5rem 1.1rem !important; font-weight: 600; font-size: 0.9rem;
  transition: background 0.15s ease;
}
.btn-cta:hover { background: var(--copper); }

.btn-outline {
  border: 1.5px solid var(--ink); color: var(--ink) !important; border-radius: 6px;
  padding: 0.5rem 1.1rem; font-weight: 600; font-size: 0.9rem; display: inline-flex; align-items: center; gap: 0.4rem;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.btn-outline:hover { border-color: var(--copper); color: var(--copper) !important; }

.back-to-hub-strip { background: var(--surface-dark); }
.back-link { display: inline-flex; align-items: center; gap: 0.4rem; color: var(--copper-light); font-family: var(--font-mono); font-size: 0.8rem; padding: 0.45rem 0; }
.back-link:hover { color: #fff; }

/* ---------- Hero ---------- */
.hero { padding: 4rem 0 3rem; }
.hero-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 3rem; align-items: center; }
@media (max-width: 991px) { .hero-grid { grid-template-columns: 1fr; gap: 2rem; } }

.eyebrow { font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--copper); font-weight: 600; margin-bottom: 0.5rem; }
.hero-copy h1 { font-size: 2.3rem; font-weight: 700; line-height: 1.2; margin: 0 0 1rem; color: var(--ink); }
.hero-lead { font-size: 1.08rem; color: var(--ink-soft); margin-bottom: 1.75rem; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 0.85rem; margin-bottom: 1.25rem; }
.hero-hints p { font-size: 0.88rem; color: var(--muted); margin: 0.25rem 0; }
.hero-hints strong { color: var(--ink-soft); }

.hero-panel { background: var(--surface-dark); border-radius: 10px; padding: 1.5rem; }
.panel-label { font-family: var(--font-mono); font-size: 0.72rem; color: var(--copper-light); margin-bottom: 1rem; letter-spacing: 0.02em; }
.readout-row { display: flex; align-items: baseline; justify-content: space-between; gap: 0.75rem; padding: 0.6rem 0; border-bottom: 1px solid rgba(255,255,255,0.08); font-family: var(--font-mono); }
.readout-row:last-child { border-bottom: none; }
.readout-row span { color: #9FB0C9; font-size: 0.82rem; flex: 1; }
.readout-row strong { color: #fff; font-size: 0.95rem; }
.readout-row small { color: #6E7E97; font-size: 0.68rem; min-width: 92px; text-align: right; }

/* ---------- Circuit divider ---------- */
.circuit-divider { max-width: 1200px; margin: 0 auto; padding: 0 1rem; }
.circuit-divider svg { width: 100%; height: 36px; display: block; }

/* ---------- Proses ---------- */
.process { padding: 2.5rem 0; }
.process h2, .process .eyebrow { text-align: left; }
.process-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; margin-top: 1rem; }
@media (max-width: 767px) { .process-grid { grid-template-columns: 1fr; } }
.step-no { font-family: var(--font-mono); color: var(--copper); font-size: 0.85rem; font-weight: 500; }
.process-step h3 { font-size: 1.1rem; margin: 0.4rem 0 0.5rem; color: var(--ink); }
.process-step p { font-size: 0.92rem; color: var(--ink-soft); margin: 0; }
.process-step code { font-family: var(--font-mono); font-size: 0.78rem; background: rgba(20,33,61,0.06); padding: 0.1rem 0.35rem; border-radius: 4px; word-break: break-all; }
.process-step .btn-outline { margin-top: 0.85rem; padding: 0.4rem 0.9rem; font-size: 0.82rem; display: inline-flex; align-items: center; gap: 0.4rem; }

/* ---------- Modul / kartu subdomain ---------- */
.modules { padding: 2rem 0 4rem; }
.modules h2 { font-size: 1.6rem; margin: 0 0 0.5rem; color: var(--ink); }
.modules-lead { font-size: 0.92rem; color: var(--muted); margin: 0 0 1.75rem; max-width: 560px; }

.module-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
  padding: 1.5rem; height: 100%; display: flex; flex-direction: column;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.module-card:hover { border-color: var(--copper); transform: translateY(-2px); }

.module-card-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.9rem; }
.module-icon { font-size: 1.4rem; color: var(--copper); }

.status-tag { font-family: var(--font-mono); font-size: 0.65rem; letter-spacing: 0.03em; text-transform: uppercase; padding: 0.2rem 0.55rem; border-radius: 99px; }
.status-aktif { background: rgba(79, 121, 66, 0.12); color: var(--green); }
.status-draf { background: rgba(181, 101, 29, 0.12); color: var(--copper); }
.status-segera { background: rgba(112, 123, 137, 0.12); color: var(--muted); }

.module-title { font-size: 1.2rem; font-weight: 600; margin: 0 0 0.2rem; color: var(--ink); }
.module-url { font-family: var(--font-mono); font-size: 0.74rem; color: var(--muted); margin: 0 0 0.75rem; }
.module-desc { font-size: 0.9rem; color: var(--ink-soft); margin: 0 0 1rem; flex-grow: 1; }

.module-sublinks { list-style: none; padding: 0; margin: 0 0 1.1rem; border-top: 1px solid var(--border); padding-top: 0.75rem; }
.module-sublinks li { margin-bottom: 0.4rem; }
.module-sublinks a { font-size: 0.84rem; color: var(--ink-soft); display: inline-flex; align-items: center; gap: 0.35rem; }
.module-sublinks a:hover { color: var(--copper); }
.module-sublinks i { font-size: 0.7em; }

.module-cta { margin-top: auto; font-size: 0.88rem; font-weight: 600; color: var(--ink); display: inline-flex; align-items: center; gap: 0.4rem; }
.module-cta:hover { color: var(--copper); }

/* ---------- Footer ---------- */
.site-footer { background: var(--surface-dark); color: #C8D2E0; padding: 3rem 0 1.5rem; margin-top: 2rem; }
.footer-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 2.5rem; }
@media (max-width: 767px) { .footer-grid { grid-template-columns: 1fr; gap: 2rem; } }

.footer-school { font-weight: 600; color: #fff; margin: 0.75rem 0 0.1rem; font-size: 0.95rem; }
.footer-city { font-size: 0.82rem; color: #8294AD; margin: 0; }

.footer-heading { font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.05em; color: #8294AD; margin-bottom: 0.9rem; }
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin-bottom: 0.6rem; font-size: 0.88rem; }
.footer-links a { color: #C8D2E0; display: inline-flex; align-items: center; gap: 0.5rem; }
.footer-links a:hover { color: #fff; }

.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); margin-top: 2rem; padding-top: 1.25rem; }
.footer-bottom p { font-size: 0.78rem; color: #6E7E97; margin: 0; }

/* ==========================================================================
   Komponen tambahan untuk landing page subdomain (Tahap 3-6)
   Dipakai oleh: geografi, matematika, adiwiyata, data. Tidak mengubah
   komponen di atas, hanya menambah selector baru.
   ========================================================================== */

.subdomain-hero { padding: 3.5rem 0 2rem; }
.subdomain-hero h1 { font-size: 2rem; font-weight: 700; margin: 0 0 1rem; color: var(--ink); }
.subdomain-hero .hero-lead { margin-bottom: 1.25rem; max-width: 640px; }

.materi-section { padding: 1rem 0 4rem; }
.materi-section h2 { font-size: 1.4rem; margin: 0 0 1.5rem; color: var(--ink); }

.materi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.25rem; }
.materi-card { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 1.25rem; }
.materi-kelas { font-family: var(--font-mono); font-size: 0.7rem; color: var(--copper); text-transform: uppercase; letter-spacing: 0.03em; }
.materi-card h3 { font-size: 1.05rem; margin: 0.4rem 0 0.5rem; color: var(--ink); }
.materi-card p { font-size: 0.88rem; color: var(--ink-soft); margin: 0 0 0.9rem; }

.empty-state { border: 1px dashed var(--border); border-radius: 10px; padding: 2rem; max-width: 540px; }
.empty-title { font-weight: 600; font-size: 1.05rem; color: var(--ink); margin: 0 0 0.4rem; }
.empty-body { font-size: 0.88rem; color: var(--muted); margin: 0; }
.empty-body code { font-family: var(--font-mono); background: rgba(20,33,61,0.06); padding: 0.1rem 0.35rem; border-radius: 4px; }

.sensor-preview { padding: 1rem 0 4rem; }
.sensor-preview h2 { font-size: 1.4rem; margin: 0 0 1.5rem; color: var(--ink); max-width: 600px; }
.standalone-panel { max-width: 420px; }