/* =========================================================
   Katalog Buku Digital — style.css
   ========================================================= */

:root {
  --bg: #f6f7fb;
  --surface: #ffffff;
  --surface-2: #eef1f8;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --primary: #4f46e5;
  --primary-soft: #eef0ff;
  --accent: #0ea5e9;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);
  --shadow: 0 6px 24px rgba(15, 23, 42, .08);
  --shadow-lg: 0 16px 40px rgba(15, 23, 42, .14);
  --radius: 16px;
  --radius-sm: 10px;
  --wrap: 1180px;
}

html[data-theme="dark"] {
  --bg: #0b1120;
  --surface: #131c31;
  --surface-2: #1c2740;
  --text: #e8edf7;
  --muted: #94a3b8;
  --border: #22304d;
  --primary: #818cf8;
  --primary-soft: #1e2749;
  --accent: #38bdf8;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);
  --shadow: 0 6px 24px rgba(0, 0, 0, .45);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, .55);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  transition: background .25s ease, color .25s ease;
}

img { max-width: 100%; display: block; }

a { color: inherit; }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 20px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--primary);
  color: #fff;
  padding: 10px 16px;
  border-radius: 0 0 8px 0;
  z-index: 100;
}
.skip-link:focus { left: 0; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}
.brand-mark { font-size: 24px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text strong { font-size: 16px; font-weight: 800; letter-spacing: -.01em; }
.brand-text small { font-size: 11px; color: var(--muted); }

.search-box {
  position: relative;
  flex: 1;
  display: flex;
  align-items: center;
  min-width: 0;
}
.search-icon {
  position: absolute;
  left: 14px;
  width: 18px;
  height: 18px;
  fill: var(--muted);
  pointer-events: none;
}
#search {
  width: 100%;
  padding: 11px 40px 11px 42px;
  font: inherit;
  font-size: 14px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  outline: none;
  transition: border-color .2s, box-shadow .2s;
}
#search:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--primary) 18%, transparent);
}
#search::-webkit-search-cancel-button { display: none; }

.search-clear {
  position: absolute;
  right: 10px;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 50%;
}
.search-clear:hover { background: var(--surface-2); color: var(--text); }

.theme-toggle {
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
  transition: transform .15s, background .2s;
}
.theme-toggle:hover { transform: scale(1.06); background: var(--surface-2); }

/* ---------- Hero ---------- */
.hero { padding: 40px 0 8px; }
.hero h1 {
  margin: 0 0 8px;
  font-size: clamp(24px, 4vw, 36px);
  font-weight: 800;
  letter-spacing: -.02em;
}
.hero-sub { margin: 0; color: var(--muted); font-size: 15px; }

.stats { margin-top: 14px; font-size: 13px; color: var(--muted); }
.stats b { color: var(--text); }

/* ---------- Chips ---------- */
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 18px 0 4px;
}
.chip {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  padding: 7px 14px;
  border-radius: 999px;
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all .18s;
}
.chip:hover { border-color: var(--primary); color: var(--text); }
.chip[aria-pressed="true"] {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* ---------- Status / messages ---------- */
.status { min-height: 24px; padding: 20px 0 4px; color: var(--muted); font-size: 14px; }
.status.error {
  color: #b91c1c;
  background: #fee2e2;
  border: 1px solid #fecaca;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
}
html[data-theme="dark"] .status.error { background: #3b1518; border-color: #6b1f26; color: #fca5a5; }

.spinner {
  width: 22px;
  height: 22px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin .8s linear infinite;
  display: inline-block;
  vertical-align: middle;
  margin-right: 10px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Grid ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 22px;
  padding: 14px 0 60px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s;
}
.card:hover,
.card:focus-within {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: color-mix(in srgb, var(--primary) 45%, var(--border));
}

.cover {
  position: relative;
  aspect-ratio: 2 / 3;
  background: linear-gradient(140deg, var(--surface-2), var(--border));
  overflow: hidden;
}
.cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .35s ease;
}
.card:hover .cover img { transform: scale(1.05); }

.cover-fallback {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 52px;
  font-weight: 800;
  color: color-mix(in srgb, var(--primary) 70%, var(--muted));
  background:
    radial-gradient(120% 80% at 50% 0%, var(--primary-soft), transparent 70%),
    linear-gradient(140deg, var(--surface-2), var(--border));
  letter-spacing: -.02em;
  user-select: none;
}

.badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: color-mix(in srgb, #0f172a 78%, transparent);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 4px 9px;
  border-radius: 999px;
  letter-spacing: .02em;
  backdrop-filter: blur(4px);
  max-width: calc(100% - 20px);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.card-body {
  padding: 13px 14px 15px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}
.card-title {
  margin: 0;
  font-size: 14.5px;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -.01em;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-author { margin: 0; font-size: 12.5px; color: var(--muted); }

.card-actions {
  margin-top: auto;
  padding-top: 12px;
  display: flex;
  gap: 8px;
}
.btn {
  flex: 1;
  text-align: center;
  text-decoration: none;
  font-size: 12.5px;
  font-weight: 700;
  padding: 9px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all .18s;
  white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { filter: brightness(1.08); }
.btn-ghost { background: var(--surface-2); color: var(--text); border-color: var(--border); }
.btn-ghost:hover { background: var(--primary-soft); border-color: var(--primary); }

/* ---------- Empty ---------- */
.empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 70px 20px;
  color: var(--muted);
}
.empty-emoji { font-size: 44px; margin-bottom: 10px; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 26px 0;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}
.site-footer p { margin: 0; }

/* ---------- Modal detail ---------- */
body.modal-open { overflow: hidden; }

/* atribut `hidden` harus menang atas display:flex di bawah */
.modal[hidden] { display: none; }

.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: color-mix(in srgb, #0b1120 62%, transparent);
  backdrop-filter: blur(4px);
  animation: fade .18s ease;
}
@keyframes fade { from { opacity: 0; } }

.modal-panel {
  position: relative;
  width: 100%;
  max-width: 760px;
  max-height: 88vh;
  overflow-y: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 26px;
  animation: pop .2s ease;
}
@keyframes pop { from { transform: translateY(12px) scale(.98); opacity: 0; } }

.modal-close {
  position: absolute;
  top: 12px;
  right: 14px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
}
.modal-close:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

#detail-body { display: flex; gap: 24px; }
.detail-cover {
  position: relative;
  flex: 0 0 190px;
  aspect-ratio: 2 / 3;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: linear-gradient(140deg, var(--surface-2), var(--border));
}
.detail-cover img { width: 100%; height: 100%; object-fit: cover; }
.detail-cover .cover-fallback { font-size: 64px; }

.detail-info { flex: 1; min-width: 0; }
.badge-inline {
  position: static;
  display: inline-block;
  background: var(--primary-soft);
  color: var(--primary);
  margin-bottom: 8px;
}
#detail-title {
  margin: 0 0 4px;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.25;
}
.detail-author { margin: 0 0 12px; color: var(--muted); font-size: 14px; }
.detail-sinopsis { margin: 0 0 14px; font-size: 14px; color: var(--text); }

.detail-list { margin: 0 0 14px; padding: 0; display: grid; gap: 0; }
.detail-row {
  display: flex;
  gap: 12px;
  padding: 7px 0;
  border-bottom: 1px dashed var(--border);
  font-size: 13.5px;
}
.detail-row dt { flex: 0 0 130px; color: var(--muted); }
.detail-row dd { margin: 0; flex: 1; }

.flags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.flag {
  font-size: 12px;
  font-weight: 700;
  padding: 5px 11px;
  border-radius: 999px;
  border: 1px solid var(--border);
}
.flag.on { background: color-mix(in srgb, #16a34a 16%, transparent); color: #15803d; border-color: color-mix(in srgb, #16a34a 40%, transparent); }
.flag.off { background: var(--surface-2); color: var(--muted); }
html[data-theme="dark"] .flag.on { color: #86efac; }

.detail-actions { display: flex; gap: 10px; }
.detail-actions .btn { flex: 0 0 auto; padding: 11px 22px; font-size: 13.5px; }

@media (max-width: 620px) {
  .modal { padding: 0; align-items: flex-end; }
  .modal-panel { max-height: 92vh; border-radius: var(--radius) var(--radius) 0 0; padding: 22px 18px; }
  #detail-body { flex-direction: column; gap: 16px; }
  .detail-cover { flex: none; width: 150px; margin: 0 auto; }
  .detail-row dt { flex: 0 0 110px; }
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  .header-inner { flex-wrap: wrap; min-height: auto; padding-top: 12px; padding-bottom: 12px; gap: 10px; }
  .search-box { order: 3; flex-basis: 100%; }
  .brand-text small { display: none; }
  .hero { padding-top: 26px; }
  .grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 16px; }
  .card-actions { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}