/* =======================================================
   Design tokens - HSP Academy (biru & putih)
   ======================================================= */
:root {
  --color-primary: #1877F2;
  --color-primary-dark: #0F5FD1;
  --color-primary-tint: #EAF2FF;
  --color-ink: #14171A;
  --color-muted: #667085;
  --color-accent: #E63946;
  --color-white: #FFFFFF;
  --color-border: #E4E9F0;

  --font-display: 'Sora', sans-serif;
  --font-body: 'Inter', sans-serif;

  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-card: 0 4px 20px rgba(20, 23, 26, 0.06);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-ink);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
}

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

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

/* ---------- Header ---------- */
.site-header {
  background: var(--color-primary);
  position: sticky;
  top: 0;
  z-index: 50;
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo img { display: block; height: 40px; width: auto; background: var(--color-white); border-radius: 6px; padding: 4px 8px; }
.main-nav { display: flex; gap: 28px; }
.main-nav a {
  color: var(--color-white);
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
}
.main-nav a.active,
.main-nav a:hover { border-bottom-color: var(--color-white); }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(180deg, var(--color-primary-tint) 0%, var(--color-white) 100%);
  padding: 56px 24px 32px;
}
.hero-inner { max-width: 760px; margin: 0 auto; text-align: center; }
.eyebrow {
  font-family: var(--font-display);
  color: var(--color-primary);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin: 0 0 12px;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.2;
  margin: 0 0 28px;
}
.search-form {
  display: flex;
  max-width: 480px;
  margin: 0 auto;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 4px;
  box-shadow: var(--shadow-card);
}
.search-form input {
  flex: 1;
  border: none;
  outline: none;
  padding: 12px 18px;
  font-family: var(--font-body);
  font-size: 15px;
  border-radius: 999px;
}
.search-form button {
  border: none;
  background: var(--color-primary);
  color: var(--color-white);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 14px;
  padding: 0 24px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s ease;
}
.search-form button:hover { background: var(--color-primary-dark); }
.search-form button:focus-visible,
.chip:focus-visible,
.load-more:focus-visible { outline: 3px solid var(--color-primary-dark); outline-offset: 2px; }

/* ---------- Kategori filter ---------- */
.kategori-filter {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 20px 24px;
  max-width: 1200px;
  margin: 0 auto;
}
.chip {
  --chip-color: var(--color-primary);
  flex: 0 0 auto;
  border: 1.5px solid var(--color-border);
  background: var(--color-white);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 14px;
  padding: 8px 18px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.chip.active,
.chip:hover {
  background: var(--chip-color);
  border-color: var(--chip-color);
  color: var(--color-white);
}

/* ---------- Layout ---------- */
.content-layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 24px 64px;
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 40px;
  align-items: start;
}

/* ---------- Berita grid & card ---------- */
.berita-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.berita-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.berita-card:hover { transform: translateY(-3px); box-shadow: 0 10px 28px rgba(20,23,26,0.10); }
.berita-card .thumb { position: relative; display: block; aspect-ratio: 5 / 3; background: var(--color-primary-tint); }
.berita-card .thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.ribbon {
  --chip-color: var(--color-primary);
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--chip-color);
  color: var(--color-white);
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 999px;
}
.berita-card-body { padding: 18px 20px 20px; }
.berita-card-body h2 {
  font-family: var(--font-display);
  font-size: 17px;
  line-height: 1.35;
  margin: 0 0 8px;
}
.berita-card-body h2 a:hover { color: var(--color-primary); }
.berita-card-body p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.5;
  margin: 0 0 14px;
}
.meta {
  display: flex;
  gap: 8px;
  font-size: 12.5px;
  color: var(--color-muted);
}

.load-more {
  display: block;
  margin: 32px auto 0;
  background: var(--color-white);
  border: 1.5px solid var(--color-primary);
  color: var(--color-primary);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 14px;
  padding: 12px 28px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.load-more:hover { background: var(--color-primary); color: var(--color-white); }
.load-more[data-loading="true"] { opacity: 0.6; pointer-events: none; }

.empty-state { text-align: center; color: var(--color-muted); padding: 40px 0; }

/* ---------- Skeleton loading ---------- */
.berita-card.skeleton .thumb,
.skeleton-line {
  background: linear-gradient(90deg, #EEF1F5 25%, #E4E9F0 37%, #EEF1F5 63%);
  background-size: 400% 100%;
  animation: shimmer 1.4s ease infinite;
}
.skeleton-line { height: 12px; border-radius: 6px; margin-bottom: 8px; }
@keyframes shimmer { 0% { background-position: 100% 0; } 100% { background-position: 0 0; } }

/* ---------- Trending sidebar (signature element) ---------- */
.trending {
  background: var(--color-primary-tint);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: sticky;
  top: 88px;
}
.trending h2 {
  font-family: var(--font-display);
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-primary-dark);
  margin: 0 0 18px;
}
.trending ol { list-style: none; margin: 0; padding: 0; counter-reset: trend; }
.trending li {
  counter-increment: trend;
  display: flex;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(15, 95, 209, 0.12);
}
.trending li:last-child { border-bottom: none; }
.trending li::before {
  content: counter(trend);
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  color: var(--color-primary);
  opacity: 0.5;
  min-width: 22px;
}
.trending li a { font-size: 13.5px; font-weight: 600; line-height: 1.4; }
.trending li a:hover { color: var(--color-primary); }
.trending li span { display: block; font-size: 11.5px; color: var(--color-muted); margin-top: 4px; font-weight: 500; }

/* ---------- Footer ---------- */
.site-footer { background: var(--color-primary); color: var(--color-white); margin-top: 40px; }
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: space-between;
  font-size: 14px;
}
.footer-inner p { margin: 4px 0; }
.social { display: flex; gap: 12px; align-self: center; }
.social a {
  width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,0.15);
  border-radius: 8px;
  font-size: 12px;
  font-weight: 700;
}
.copyright { text-align: center; font-size: 12px; padding: 14px 0; background: rgba(0,0,0,0.12); margin: 0; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .content-layout { grid-template-columns: 1fr; }
  .trending { position: static; }
  .berita-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .main-nav { display: none; }
  .berita-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  .berita-card, .load-more, .chip { transition: none; }
  .skeleton-line, .berita-card.skeleton .thumb { animation: none; }
}