/* =====================================================================
   GENETHINK — Public site styles (landing, tentang, kontak, materi, auth)
   ===================================================================== */

/* ---------------------------------------------------------------
   NAVBAR
   --------------------------------------------------------------- */
.site-navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(247, 248, 255, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.site-navbar .container { display: flex; align-items: center; justify-content: space-between; height: 78px; }
.brand { display: flex; align-items: center; gap: 11px; }
.brand-mark {
  width: 42px; height: 42px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.brand-mark .icon { width: 24px; height: 24px; color: var(--primary); }
.brand-mark img { width: 100%; height: 100%; object-fit: contain; display: block; }
.brand-text { font-family: var(--font-display); font-weight: 800; font-size: 1.28rem; color: var(--dark); line-height: 1; letter-spacing: -0.02em; }
.brand-text span { color: var(--primary); }
.brand-tagline { font-size: 0.68rem; color: var(--text-muted); font-weight: 600; margin-top: 2px; }

.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
  padding: 9px 15px; border-radius: var(--radius-pill);
  font-weight: 600; font-size: 0.9rem; color: var(--text-secondary);
  transition: background .15s ease, color .15s ease;
}
.nav-links a:hover, .nav-links a.active { background: var(--primary-50); color: var(--primary); }

.navbar-actions { display: flex; align-items: center; gap: 10px; }
.hamburger-btn {
  display: none; background: #fff; border: 1.5px solid var(--border);
  border-radius: var(--radius-sm); padding: 9px; color: var(--text-primary);
}

/* ---------------------------------------------------------------
   HERO
   --------------------------------------------------------------- */
.hero-section { padding: 64px 0 0; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 40px; align-items: center; }
.eyebrow-line { font-family: var(--font-display); font-weight: 700; font-size: 1.05rem; color: var(--text-secondary); margin-bottom: 2px; }
.hero-title {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.02;
  margin: 2px 0 14px;
}
.hero-title .grad {
  background: var(--gradient-brand);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-subtitle { font-family: var(--font-display); font-weight: 700; font-size: 1.35rem; color: var(--dark); margin-bottom: 14px; }
.hero-desc { font-size: 1.02rem; max-width: 480px; margin-bottom: 28px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 40px; }

.hero-visual { position: relative; display: flex; align-items: center; justify-content: center; min-height: 420px; }
.hero-visual-glow {
  position: absolute; width: 400px; height: 400px; border-radius: 50%;
  background: radial-gradient(circle, var(--primary-100) 0%, rgba(124,58,237,.10) 55%, transparent 75%);
  filter: blur(6px); z-index: 0;
  animation: hero-glow-pulse 5s ease-in-out infinite;
}
.hero-visual-ring {
  position: absolute; border-radius: 50%; border: 1.5px dashed var(--border-strong);
  opacity: .55; z-index: 0;
}
.hero-visual-ring.r1 { width: 320px; height: 320px; animation: hero-spin 40s linear infinite; }
.hero-visual-ring.r2 { width: 400px; height: 400px; border-color: var(--primary-100); animation: hero-spin 60s linear infinite reverse; }
.hero-visual-icon {
  position: relative; z-index: 1; width: 280px; max-width: 78%; height: auto;
  filter: drop-shadow(0 24px 48px rgba(84,51,224,.28));
  animation: hero-float 5s ease-in-out infinite;
}
.hero-visual-particle {
  position: absolute; border-radius: 50%; z-index: 1;
  background: var(--gradient-brand); box-shadow: 0 6px 14px -4px rgba(84,51,224,.5);
}
.hero-visual-particle.p1 { width: 16px; height: 16px; top: 12%; right: 18%; animation: hero-float-particle 4s ease-in-out infinite; }
.hero-visual-particle.p2 { width: 10px; height: 10px; top: 22%; right: 8%; opacity: .8; animation: hero-float-particle 5s ease-in-out infinite .5s; }
.hero-visual-particle.p3 { width: 22px; height: 22px; bottom: 14%; left: 10%; opacity: .55; animation: hero-float-particle 6s ease-in-out infinite 1s; }
.hero-visual-particle.p4 { width: 12px; height: 12px; bottom: 26%; right: 14%; animation: hero-float-particle 4.5s ease-in-out infinite .3s; }
.hero-visual-particle.p5 { width: 8px; height: 8px; top: 42%; left: 6%; opacity: .7; animation: hero-float-particle 5.5s ease-in-out infinite .8s; }

@keyframes hero-float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-14px); } }
@keyframes hero-glow-pulse { 0%, 100% { opacity: .7; transform: scale(1); } 50% { opacity: 1; transform: scale(1.06); } }
@keyframes hero-spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
@keyframes hero-float-particle { 0%, 100% { transform: translateY(0) scale(1); } 50% { transform: translateY(-10px) scale(1.12); } }
@media (prefers-reduced-motion: reduce) {
  .hero-visual-icon, .hero-visual-glow, .hero-visual-ring, .hero-visual-particle { animation: none; }
}

.features-strip {
  margin: 0 auto 64px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 30px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 26px;
}
.feature-item { display: flex; gap: 14px; align-items: flex-start; }
.feature-icon {
  width: 46px; height: 46px; border-radius: 13px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: var(--primary-50); color: var(--primary);
}
.feature-item:nth-child(2) .feature-icon { background: #E5EEFF; color: var(--secondary); }
.feature-item:nth-child(3) .feature-icon { background: #F1E9FE; color: var(--purple); }
.feature-item:nth-child(4) .feature-icon { background: #EAF6EE; color: var(--success); }
.feature-item h4 { font-size: 0.98rem; margin-bottom: 4px; }
.feature-item p { font-size: 0.85rem; margin: 0; }

/* ---------------------------------------------------------------
   SECTION HEADERS
   --------------------------------------------------------------- */
.section { padding: 20px 0 72px; }
.section-head { text-align: center; max-width: 620px; margin: 0 auto 42px; }
.section-eyebrow {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-display); font-weight: 700; font-size: 0.76rem;
  text-transform: uppercase; letter-spacing: .07em; color: var(--primary);
  background: var(--primary-50); padding: 6px 14px; border-radius: var(--radius-pill);
  margin-bottom: 14px;
}
.section-head h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
.section-head p { font-size: 1rem; }
.section-head.align-left { text-align: left; margin: 0 0 32px; }

/* ---------------------------------------------------------------
   MATERI GRID (public/catalog)
   --------------------------------------------------------------- */
.materi-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}
.materi-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius-md);
  padding: 20px; box-shadow: var(--shadow-sm);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
  display: flex; flex-direction: column; gap: 14px;
}
.materi-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--border-strong); }
.materi-card__thumb {
  width: 100%; aspect-ratio: 1.5/1; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  background: var(--primary-50);
  position: relative;
}
.materi-card__thumb .icon { width: 44%; height: 44%; }
.materi-card__number {
  position: absolute; top: -8px; left: -8px;
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--gradient-brand); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: .74rem; font-weight: 800; font-family: var(--font-display);
  box-shadow: 0 2px 6px rgba(84,51,224,.35);
}
.materi-card__cat { font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; color: var(--text-muted); }
.materi-card h3 { font-size: 1.02rem; margin: 2px 0 4px; }
.materi-card p { font-size: 0.83rem; margin: 0; flex-grow: 1; }
.materi-card__progress { display: flex; align-items: center; gap: 8px; }
.materi-card__progress span { font-size: 0.76rem; font-weight: 700; color: var(--text-secondary); white-space: nowrap; }
.materi-card__footer { display: flex; align-items: center; justify-content: space-between; margin-top: 4px; }

.materi-card.is-locked { cursor: default; opacity: .68; }
.materi-card.is-locked:hover { transform: none; box-shadow: var(--shadow-sm); border-color: var(--border); }
.materi-card.is-locked .materi-card__thumb { background: var(--bg); color: var(--text-muted) !important; }
.materi-card__lock-note {
  display: flex; align-items: center; gap: 6px;
  font-size: .74rem; font-weight: 700; color: var(--text-muted);
  background: var(--bg); border-radius: 999px; padding: 6px 10px;
}
.materi-card__lock-note .icon { width: 14px; height: 14px; flex-shrink: 0; }

.catalog-toolbar {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  margin-bottom: 30px; flex-wrap: wrap;
}
.catalog-filters { display: flex; gap: 10px; flex-wrap: wrap; }
.chip-filter {
  padding: 9px 17px; border-radius: var(--radius-pill); border: 1.5px solid var(--border);
  font-size: 0.84rem; font-weight: 600; color: var(--text-secondary); background: #fff;
}
.chip-filter.active, .chip-filter:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-50); }
.search-box { position: relative; min-width: 240px; flex-grow: 1; max-width: 320px; }
.search-box input { width: 100%; padding: 11px 16px 11px 42px; border-radius: var(--radius-pill); border: 1.5px solid var(--border); font-size: 0.88rem; }
.search-box .icon { position: absolute; left: 15px; top: 50%; transform: translateY(-50%); color: var(--text-muted); width: 18px; height: 18px; }

/* ---------------------------------------------------------------
   STATS / ABOUT
   --------------------------------------------------------------- */
.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin: 46px 0; }
.stat-box { text-align: center; background: #fff; border: 1px solid var(--border); border-radius: var(--radius-md); padding: 26px 16px; }
.stat-box .num { font-family: var(--font-display); font-weight: 800; font-size: 2rem; background: var(--gradient-brand); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat-box .lbl { font-size: 0.82rem; color: var(--text-muted); font-weight: 600; margin-top: 4px; }

.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.about-list li { display: flex; gap: 12px; margin-bottom: 16px; align-items: flex-start; }
.about-list .check-dot {
  width: 26px; height: 26px; border-radius: 50%; background: var(--success-bg); color: var(--success);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 2px;
}
.about-visual { border-radius: var(--radius-lg); background: var(--gradient-soft); border: 1px solid var(--border); padding: 40px; display: flex; align-items: center; justify-content: center; }

/* ---------------------------------------------------------------
   FOR LECTURER PAGE
   --------------------------------------------------------------- */
.step-timeline { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.step-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius-md); padding: 26px; position: relative; }
.step-num {
  width: 38px; height: 38px; border-radius: 11px; background: var(--gradient-brand); color: #fff;
  display: flex; align-items: center; justify-content: center; font-family: var(--font-display); font-weight: 800; margin-bottom: 16px;
}

/* ---------------------------------------------------------------
   CONTACT
   --------------------------------------------------------------- */
.contact-grid { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 40px; }
.contact-info-item { display: flex; gap: 14px; align-items: flex-start; margin-bottom: 22px; }
.contact-info-item .feature-icon { background: var(--primary-50); color: var(--primary); }

/* ---------------------------------------------------------------
   CTA BAND
   --------------------------------------------------------------- */
.cta-band {
  background: var(--gradient-brand); border-radius: var(--radius-lg);
  padding: 52px 40px; text-align: center; color: #fff; position: relative; overflow: hidden;
}
.cta-band h2 { color: #fff; }
.cta-band p { color: rgba(255,255,255,.85); max-width: 520px; margin: 0 auto 26px; }
.cta-band .btn-primary { background: #fff; color: var(--primary); box-shadow: none; }
.cta-band .btn-primary:hover { background: #F5F5FF; }

/* ---------------------------------------------------------------
   FOOTER
   --------------------------------------------------------------- */
.site-footer { background: #fff; color: var(--text-secondary); padding: 56px 0 26px; margin-top: 40px; border-top: 1px solid var(--border); }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 32px; margin-bottom: 40px; }
.footer-grid h5 { color: var(--dark); font-size: 0.86rem; text-transform: uppercase; letter-spacing: .05em; margin-bottom: 16px; }
.footer-grid li { margin-bottom: 10px; }
.footer-grid a { color: var(--text-secondary); font-size: 0.88rem; }
.footer-grid a:hover { color: var(--primary); }
.footer-brand p { color: var(--text-secondary); font-size: 0.88rem; max-width: 280px; }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 22px; display: flex; justify-content: space-between; font-size: 0.8rem; color: var(--text-muted); flex-wrap: wrap; gap: 10px; }

/* ---------------------------------------------------------------
   AUTH PAGES (login/register)
   --------------------------------------------------------------- */
.auth-shell { min-height: 100vh; display: grid; grid-template-columns: 1fr 1fr; }
.auth-visual {
  background: var(--gradient-brand); display: flex; flex-direction: column; justify-content: center;
  padding: 60px; color: #fff; position: relative; overflow: hidden;
}
.auth-visual h2 { color: #fff; font-size: 2rem; margin-top: 26px; max-width: 380px; }
.auth-visual p { color: rgba(255,255,255,.82); max-width: 380px; }
.auth-visual .decor-circle { position: absolute; border-radius: 50%; background: rgba(255,255,255,.08); }
.auth-form-side { display: flex; align-items: center; justify-content: center; padding: 40px 24px; }
.auth-card { width: 100%; max-width: 400px; }
.auth-card .brand { margin-bottom: 30px; }
.auth-card h1 { font-size: 1.7rem; margin-bottom: 6px; }
.auth-card > p { margin-bottom: 28px; }
.auth-divider { text-align: center; margin: 6px 0 20px; color: var(--text-muted); font-size: 0.85rem; }
.auth-switch { text-align: center; font-size: 0.9rem; color: var(--text-secondary); margin-top: 6px; }
.auth-switch a { color: var(--primary); font-weight: 700; }
.demo-accounts { margin-top: 26px; padding: 14px 16px; background: var(--primary-50); border-radius: var(--radius-sm); font-size: 0.78rem; color: var(--text-secondary); }
.demo-accounts strong { color: var(--text-primary); }

/* ---------------------------------------------------------------
   RESPONSIVE
   --------------------------------------------------------------- */
@media (max-width: 1080px) {
  .materi-grid { grid-template-columns: repeat(3, 1fr); }
  .features-strip { grid-template-columns: repeat(2, 1fr); }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .step-timeline { grid-template-columns: 1fr; }
}
@media (max-width: 900px) {
  .nav-links { display: none; }
  .hamburger-btn { display: inline-flex; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { order: -1; max-width: 320px; margin: 0 auto; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .auth-visual { display: none; }
  .auth-shell { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .materi-grid { grid-template-columns: repeat(2, 1fr); }
  .features-strip { grid-template-columns: 1fr; padding: 22px; }
  .stats-row { grid-template-columns: 1fr 1fr; }
  .hero-actions .btn { flex: 1; }
  .site-navbar .container { height: 68px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 420px) {
  .materi-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .footer-grid { grid-template-columns: 1fr; }
}

/* Mobile off-canvas nav drawer (public site) */
.mobile-nav-overlay { position: fixed; inset: 0; background: rgba(15,17,45,.5); z-index: 199; opacity: 0; pointer-events: none; transition: opacity .2s ease; }
.mobile-nav-overlay.open { opacity: 1; pointer-events: auto; }
.mobile-nav-drawer {
  position: fixed; top: 0; right: 0; bottom: 0; width: 78%; max-width: 320px;
  background: #fff; z-index: 200; padding: 26px 22px; transform: translateX(100%);
  transition: transform .25s ease; box-shadow: var(--shadow-lg);
  display: flex; flex-direction: column; gap: 4px;
}
.mobile-nav-drawer.open { transform: translateX(0); }
.mobile-nav-drawer a { display: flex; align-items: center; gap: 10px; padding: 13px 10px; border-radius: var(--radius-sm); font-weight: 600; color: var(--text-secondary); }
.mobile-nav-drawer a.active, .mobile-nav-drawer a:hover { background: var(--primary-50); color: var(--primary); }
.mobile-nav-drawer .btn { margin-top: 14px; }

/* ------------------------------------------------------------
   Course preview page (pratinjau materi untuk pengunjung publik)
------------------------------------------------------------ */
.course-hero {
  background: linear-gradient(180deg, var(--primary-50) 0%, var(--bg) 100%);
  border-radius: var(--radius-lg); padding: 40px; margin-bottom: 32px;
}
.course-hero-top { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 18px; }
.course-hero-badges { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.course-hero h1 { font-size: 2rem; margin: 0 0 12px; }
.course-hero p { font-size: 1rem; color: var(--text-secondary); max-width: 680px; margin: 0 0 22px; }
.course-hero-meta { display: flex; gap: 26px; flex-wrap: wrap; margin-bottom: 24px; }
.course-hero-meta-item { display: flex; align-items: center; gap: 8px; font-size: .88rem; font-weight: 600; color: var(--text-secondary); }
.course-hero-meta-item .icon { width: 18px; height: 18px; color: var(--primary); }
.course-hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

.course-grid { display: grid; grid-template-columns: 1fr 320px; gap: 28px; align-items: start; }
.course-outline-list { list-style: none; padding: 0; margin: 0; }
.course-outline-list li {
  display: flex; align-items: center; gap: 14px;
  padding: 14px 16px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  margin-bottom: 10px; background: #fff;
}
.course-outline-num {
  width: 30px; height: 30px; border-radius: 50%; background: var(--primary-50); color: var(--primary);
  display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: .82rem; flex-shrink: 0;
}
.course-outline-list li span.title { font-weight: 600; font-size: .92rem; flex-grow: 1; }
.course-outline-list li .icon { width: 16px; height: 16px; color: var(--text-muted); flex-shrink: 0; }

.course-cta-card {
  background: #fff; color: var(--text-primary); border-radius: var(--radius-lg);
  padding: 26px; position: sticky; top: 100px; border: 1px solid var(--border); box-shadow: var(--shadow-md);
}
.course-cta-card h3 { color: var(--dark); font-size: 1.1rem; margin-bottom: 8px; }
.course-cta-card p { color: var(--text-secondary); font-size: .86rem; margin-bottom: 18px; line-height: 1.55; }
.course-cta-card .btn-primary { width: 100%; margin-bottom: 10px; }
.course-cta-card .btn-outline { width: 100%; background: transparent; border-color: var(--border-strong); color: var(--text-primary); }
.course-cta-card .btn-outline:hover { background: var(--primary-50); border-color: var(--primary); color: var(--primary); }
.course-cta-list { list-style: none; padding: 0; margin: 18px 0 0; border-top: 1px solid var(--border); padding-top: 16px; }
.course-cta-list li { display: flex; align-items: center; gap: 10px; font-size: .82rem; color: var(--text-secondary); margin-bottom: 10px; }
.course-cta-list li .icon { width: 16px; height: 16px; color: var(--primary); flex-shrink: 0; }

@media (max-width: 900px) {
  .course-grid { grid-template-columns: 1fr; }
  .course-cta-card { position: static; }
}
@media (max-width: 640px) {
  .course-hero { padding: 26px 20px; }
  .course-hero h1 { font-size: 1.5rem; }
}

/* ------------------------------------------------------------
   Artikel / Blog
------------------------------------------------------------ */
.article-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.article-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg);
  overflow: hidden; display: flex; flex-direction: column; transition: box-shadow .15s, transform .15s;
}
.article-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.article-card__thumb {
  width: 100%; aspect-ratio: 16/10; display: flex; align-items: center; justify-content: center;
  background: var(--gradient-brand); color: #fff; overflow: hidden;
}
.article-card__thumb img { width: 100%; height: 100%; object-fit: cover; }
.article-card__thumb .icon { width: 46px; height: 46px; opacity: .85; }
.article-card__body { padding: 20px; display: flex; flex-direction: column; flex-grow: 1; }
.article-card__meta { display: flex; align-items: center; gap: 8px; font-size: .74rem; color: var(--text-muted); font-weight: 600; margin-bottom: 10px; }
.article-card__meta .icon { width: 13px; height: 13px; }
.article-card h3 { font-size: 1.04rem; margin: 0 0 8px; line-height: 1.35; }
.article-card p { font-size: .86rem; color: var(--text-secondary); flex-grow: 1; margin: 0 0 14px; }
.article-card__link { font-size: .84rem; font-weight: 700; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; }
.article-card__link .icon { width: 14px; height: 14px; }

.article-detail-header { max-width: 760px; margin: 0 auto 30px; text-align: center; }
.article-detail-header .badge { margin-bottom: 16px; }
.article-detail-header h1 { font-size: 2rem; margin-bottom: 16px; }
.article-detail-meta { display: flex; align-items: center; justify-content: center; gap: 18px; flex-wrap: wrap; font-size: .86rem; color: var(--text-muted); font-weight: 600; }
.article-detail-meta .icon { width: 15px; height: 15px; }
.article-detail-thumb { max-width: 860px; margin: 0 auto 36px; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-md); }
.article-detail-thumb img { width: 100%; display: block; }
.article-body-wrap { max-width: 720px; margin: 0 auto; }
.article-body-wrap .lesson-body { font-size: 1.02rem; }

@media (max-width: 980px) {
  .article-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .article-grid { grid-template-columns: 1fr; }
  .article-detail-header h1 { font-size: 1.5rem; }
}