/* ==========================================================================
   Cambodia Postal Code Finder — Design System
   Palette: rice-paper cream / night-market indigo, saffron gold, lotus pink,
   Mekong teal. Display serif (Fraunces) + Plus Jakarta Sans + Noto Sans Khmer
   + JetBrains Mono for postal-stamp digits.
   ========================================================================== */

:root{
  --bg: #FAF6EC;
  --bg-alt: #F1E9D8;
  --surface: #FFFFFF;
  --ink: #211C14;
  --ink-soft: #5B5343;
  --line: #E6DCC5;

  --gold: #C08A2E;
  --gold-ink: #7A5A1C;
  --lotus: #B5386E;
  --river: #1B6E77;
  --river-deep: #114F57;

  --stamp-bg: #FFFDF7;

  --success: #2E8B57;
  --danger: #C0392B;

  --radius-s: 8px;
  --radius-m: 14px;
  --radius-l: 22px;

  --shadow: 0 6px 20px -8px rgba(33,28,20,.25);
  --shadow-soft: 0 2px 10px -4px rgba(33,28,20,.15);

  --font-display: "Fraunces", "Noto Serif Khmer", serif;
  --font-body: "Plus Jakarta Sans", "Noto Sans Khmer", sans-serif;
  --font-mono: "JetBrains Mono", monospace;

  color-scheme: light;
}

html.dark{
  --bg: #12141C;
  --bg-alt: #191C27;
  --surface: #1B1E29;
  --ink: #F3EFE3;
  --ink-soft: #B5AE9C;
  --line: #2C2F3C;

  --gold: #E3B04E;
  --gold-ink: #F0C876;
  --lotus: #E367A0;
  --river: #4FB6BE;
  --river-deep: #2B8B92;

  --stamp-bg: #20232F;

  --shadow: 0 10px 30px -10px rgba(0,0,0,.6);
  --shadow-soft: 0 4px 16px -6px rgba(0,0,0,.5);
  color-scheme: dark;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-body);
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
  transition:background .25s ease, color .25s ease;
}
img,svg{ display:block; max-width:100%; }
a{ color:inherit; }
button{ font-family:inherit; }
:focus-visible{ outline:3px solid var(--river); outline-offset:2px; }
.km{ font-family:"Noto Sans Khmer", var(--font-body); }

@media (prefers-reduced-motion: reduce){
  *{ animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; scroll-behavior:auto !important; }
}

.wrap{ max-width:1180px; margin:0 auto; padding:0 20px; }

/* ---------- Top bar ---------- */
.topbar{
  position:sticky; top:0; z-index:50;
  background:color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.topbar-inner{ display:flex; align-items:center; gap:14px; padding:12px 0; }
.brand{ display:flex; align-items:center; gap:10px; text-decoration:none; margin-right:auto; }
.brand-mark{ width:38px; height:38px; flex:none; }
.brand-text{ display:flex; flex-direction:column; line-height:1.15; }
.brand-text b{ font-family:var(--font-display); font-size:1.05rem; letter-spacing:.2px; }
.brand-text span{ font-size:.72rem; color:var(--ink-soft); }

.topbar-nav{ display:flex; align-items:center; gap:18px; margin-right:6px; }
.topbar-nav a{ font-size:.85rem; font-weight:600; text-decoration:none; color:var(--ink-soft); transition:color .15s ease; }
.topbar-nav a:hover{ color:var(--river); }
@media (max-width:560px){ .topbar-nav{ display:none; } }

.icon-btn{
  display:inline-flex; align-items:center; justify-content:center;
  width:40px; height:40px; border-radius:50%;
  border:1px solid var(--line); background:var(--surface);
  cursor:pointer; color:var(--ink); transition:transform .15s ease, background .2s;
}
.icon-btn:hover{ transform:translateY(-1px); background:var(--bg-alt); }
.icon-btn svg{ width:19px; height:19px; }

.btn{
  display:inline-flex; align-items:center; gap:8px; justify-content:center;
  border-radius:999px; border:1px solid transparent; cursor:pointer;
  font-weight:600; font-size:.88rem; padding:10px 18px; transition:transform .15s ease, box-shadow .2s, background .2s;
  white-space:nowrap;
}
.btn:hover{ transform:translateY(-1px); }
.btn-primary{ background:var(--gold); color:#231A08; box-shadow:var(--shadow-soft); }
.btn-primary:hover{ box-shadow:var(--shadow); }
.btn-ghost{ background:transparent; border-color:var(--line); color:var(--ink); }
.btn-ghost:hover{ background:var(--bg-alt); }
.btn-small{ padding:7px 12px; font-size:.78rem; border-radius:999px; }

/* ---------- Hero / search ---------- */
.hero{ padding:52px 0 28px; position:relative; overflow:hidden; }
.hero-motif{ position:absolute; inset:auto -60px -80px auto; width:420px; opacity:.10; pointer-events:none; }
html.dark .hero-motif{ opacity:.16; }
.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  font-size:.74rem; letter-spacing:.09em; text-transform:uppercase;
  color:var(--river-deep); background:color-mix(in srgb, var(--river) 14%, transparent);
  border:1px solid color-mix(in srgb, var(--river) 30%, transparent);
  padding:6px 12px; border-radius:999px; font-weight:700;
}
html.dark .eyebrow{ color:var(--river); }
.hero h1{
  font-family:var(--font-display); font-weight:600;
  font-size:clamp(2rem, 4.4vw, 3.2rem); line-height:1.08; margin:.5em 0 .3em;
  max-width:16ch;
}
.hero h1 em{ font-style:italic; color:var(--lotus); }
.hero p.lead{ color:var(--ink-soft); max-width:56ch; font-size:1.03rem; margin:0 0 26px; }

.search-panel{
  background:var(--surface); border:1px solid var(--line); border-radius:var(--radius-l);
  box-shadow:var(--shadow); padding:16px; position:relative; z-index:2;
}
.search-row{ display:flex; align-items:center; gap:10px; }
.search-row svg{ width:20px; height:20px; color:var(--ink-soft); flex:none; margin-left:6px; }
.search-row input{
  flex:1; border:none; background:transparent; outline:none;
  font-size:1.05rem; color:var(--ink); font-family:var(--font-body); padding:12px 4px;
}
.search-row input::placeholder{ color:var(--ink-soft); }
.search-clear{ display:none; }
.search-clear.show{ display:inline-flex; }

.chip-row{ display:flex; flex-wrap:wrap; gap:8px; margin-top:14px; }
.chip{
  border:1px solid var(--line); background:var(--bg-alt); color:var(--ink-soft);
  padding:7px 14px; border-radius:999px; font-size:.8rem; font-weight:600; cursor:pointer;
  transition:all .15s ease;
}
.chip.active{ background:var(--river); border-color:var(--river); color:#fff; }
.chip:hover{ transform:translateY(-1px); }

.stat-strip{ display:flex; flex-wrap:wrap; gap:22px; margin-top:24px; }
.stat-strip .stat{ display:flex; flex-direction:column; }
.stat-strip .stat b{ font-family:var(--font-mono); font-size:1.5rem; color:var(--gold-ink); }
html.dark .stat-strip .stat b{ color:var(--gold); }
.stat-strip .stat span{ font-size:.75rem; color:var(--ink-soft); text-transform:uppercase; letter-spacing:.06em; }

/* ---------- Popular chips ---------- */
.popular-wrap{ margin-top:20px; }
.popular-wrap .label{ font-size:.78rem; color:var(--ink-soft); font-weight:700; text-transform:uppercase; letter-spacing:.07em; margin-bottom:10px; }
.popular-chips{ display:flex; flex-wrap:wrap; gap:8px; }
.pop-chip{
  display:inline-flex; align-items:center; gap:6px;
  background:var(--surface); border:1px solid var(--line); border-radius:999px;
  padding:8px 14px; font-size:.85rem; font-weight:600; cursor:pointer; transition:all .15s ease;
}
.pop-chip:hover{ border-color:var(--lotus); color:var(--lotus); transform:translateY(-1px); }

/* ---------- Main layout ---------- */
.main-grid{ display:grid; grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr); gap:22px; align-items:start; margin-top:30px; }
@media (max-width:920px){ .main-grid{ grid-template-columns:minmax(0,1fr); } }

.panel{ background:var(--surface); border:1px solid var(--line); border-radius:var(--radius-l); box-shadow:var(--shadow-soft); }
.panel-head{ display:flex; align-items:center; justify-content:space-between; padding:16px 18px; border-bottom:1px solid var(--line); gap:10px; flex-wrap:wrap; }
.panel-head h2{ font-family:var(--font-display); font-size:1.15rem; margin:0; font-weight:600; }
.tabs{ display:flex; gap:4px; background:var(--bg-alt); border-radius:999px; padding:4px; }
.tab-btn{ border:none; background:transparent; padding:6px 12px; border-radius:999px; font-size:.78rem; font-weight:700; cursor:pointer; color:var(--ink-soft); }
.tab-btn.active{ background:var(--surface); color:var(--ink); box-shadow:var(--shadow-soft); }

.results-list{ padding:10px; display:flex; flex-direction:column; gap:8px; max-height:640px; overflow:auto; }
.empty-state{ padding:46px 20px; text-align:center; color:var(--ink-soft); }
.empty-state svg{ width:46px; height:46px; margin:0 auto 12px; opacity:.5; }

.result-card{
  display:flex; align-items:center; gap:12px;
  border:1px solid var(--line); border-radius:var(--radius-m); padding:12px 12px;
  cursor:pointer; background:var(--surface); transition:border-color .15s ease, transform .12s ease;
}
.result-card:hover{ border-color:var(--river); transform:translateX(2px); }
.result-card.selected{ border-color:var(--lotus); background:color-mix(in srgb, var(--lotus) 6%, var(--surface)); }
.result-level{
  flex:none; width:34px; height:34px; border-radius:9px; display:flex; align-items:center; justify-content:center;
  font-size:.65rem; font-weight:800; color:#fff; text-transform:uppercase;
}
.lvl-province{ background:var(--river); }
.lvl-capital{ background:var(--lotus); }
.lvl-district{ background:var(--gold-ink); }
.lvl-commune{ background:#6E5BAE; }
.result-main{ flex:1; min-width:0; }
.result-main .breadcrumb{ font-size:.72rem; color:var(--ink-soft); margin-bottom:2px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.result-main .name-en{ font-weight:700; font-size:.98rem; }
.result-main .name-km{ font-size:.85rem; color:var(--ink-soft); }
.result-code{ font-family:var(--font-mono); font-weight:700; font-size:1.0rem; color:var(--gold-ink); flex:none; }
html.dark .result-code{ color:var(--gold); }
.fav-toggle{ flex:none; background:none; border:none; cursor:pointer; padding:6px; color:var(--ink-soft); }
.fav-toggle svg{ width:19px; height:19px; }
.fav-toggle.active{ color:var(--lotus); }
.fav-toggle.active svg{ fill:var(--lotus); }

/* ---------- Detail / stamp card ---------- */
.detail-panel{ padding:20px; display:none; }
.detail-panel.show{ display:block; }
.stamp{
  background:var(--stamp-bg); border-radius:var(--radius-m);
  padding:22px 18px; text-align:center; position:relative;
  border:2px dashed color-mix(in srgb, var(--gold) 55%, var(--line));
}
.stamp .stamp-code{ font-family:var(--font-mono); font-size:2.3rem; font-weight:700; letter-spacing:.04em; color:var(--gold-ink); }
html.dark .stamp .stamp-code{ color:var(--gold); }
.stamp .stamp-sub{ font-size:.75rem; color:var(--ink-soft); text-transform:uppercase; letter-spacing:.1em; margin-top:4px; }

.detail-breadcrumb{ margin-top:16px; font-size:.85rem; color:var(--ink-soft); }
.detail-title{ font-family:var(--font-display); font-size:1.4rem; margin:.2em 0 0; }
.detail-title-km{ font-size:1.05rem; color:var(--ink-soft); margin-top:2px; }

.action-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:8px; margin-top:18px; }
.action-btn{
  display:flex; align-items:center; gap:8px; justify-content:center;
  padding:11px 10px; border-radius:var(--radius-s); border:1px solid var(--line);
  background:var(--bg-alt); cursor:pointer; font-size:.82rem; font-weight:700; color:var(--ink);
  transition:background .15s ease, transform .12s;
}
.action-btn:hover{ background:var(--bg); transform:translateY(-1px); }
.action-btn svg{ width:16px; height:16px; flex:none; }
.action-btn.copied{ background:color-mix(in srgb, var(--success) 18%, var(--bg-alt)); }

.detail-map{ margin-top:16px; border-radius:var(--radius-m); overflow:hidden; height:220px; border:1px solid var(--line); }

/* ---------- Map panel ---------- */
.map-shell{ height:640px; border-radius:0 0 var(--radius-l) var(--radius-l); overflow:hidden; }
#leafletMap{ width:100%; height:100%; }
.leaflet-popup-content-wrapper{ background:var(--surface); color:var(--ink); border-radius:10px; }
.leaflet-popup-tip{ background:var(--surface); }

/* ---------- Stats dashboard ---------- */
.section{ padding:56px 0; }
.section-head{ margin-bottom:26px; max-width:60ch; }
.section-head .eyebrow{ margin-bottom:10px; }
.section-head h2{ font-family:var(--font-display); font-size:clamp(1.5rem,2.6vw,2.1rem); margin:0 0 8px; font-weight:600; }
.section-head p{ color:var(--ink-soft); margin:0; }

.stats-grid{ display:grid; grid-template-columns:repeat(auto-fit,minmax(150px,1fr)); gap:14px; margin-bottom:24px; }
.stat-card{ background:var(--surface); border:1px solid var(--line); border-radius:var(--radius-m); padding:18px; }
.stat-card b{ font-family:var(--font-mono); font-size:1.8rem; display:block; color:var(--river-deep); }
html.dark .stat-card b{ color:var(--river); }
.stat-card span{ font-size:.8rem; color:var(--ink-soft); }

.bar-chart{ background:var(--surface); border:1px solid var(--line); border-radius:var(--radius-l); padding:22px; }
.bar-row{ display:grid; grid-template-columns:130px 1fr 40px; align-items:center; gap:10px; padding:7px 0; font-size:.82rem; }
.bar-track{ background:var(--bg-alt); border-radius:6px; height:12px; overflow:hidden; }
.bar-fill{ height:100%; background:linear-gradient(90deg, var(--river), var(--lotus)); border-radius:6px; }

/* ---------- Popular cards ---------- */
.pop-grid{ display:grid; grid-template-columns:repeat(auto-fit,minmax(200px,1fr)); gap:14px; }
.pop-card{
  background:var(--surface); border:1px solid var(--line); border-radius:var(--radius-m);
  padding:18px; cursor:pointer; transition:transform .15s ease, border-color .15s;
}
.pop-card:hover{ transform:translateY(-3px); border-color:var(--gold); }
.pop-card .rank{ font-family:var(--font-mono); font-size:.75rem; color:var(--ink-soft); }
.pop-card h3{ font-family:var(--font-display); font-size:1.1rem; margin:4px 0 2px; }
.pop-card p{ margin:0; font-size:.8rem; color:var(--ink-soft); }
.pop-card .code{ font-family:var(--font-mono); color:var(--gold-ink); font-weight:700; margin-top:8px; display:block; }
html.dark .pop-card .code{ color:var(--gold); }

/* ---------- FAQ ---------- */
.faq-item{ border-bottom:1px solid var(--line); }
.faq-q{ width:100%; text-align:left; background:none; border:none; padding:16px 4px; cursor:pointer; display:flex; justify-content:space-between; align-items:center; gap:12px; font-weight:700; font-size:.98rem; color:var(--ink); }
.faq-q svg{ width:18px; height:18px; flex:none; transition:transform .2s ease; color:var(--ink-soft); }
.faq-item.open .faq-q svg{ transform:rotate(45deg); }
.faq-a{ max-height:0; overflow:hidden; transition:max-height .25s ease; font-size:.9rem; color:var(--ink-soft); }
.faq-item.open .faq-a{ max-height:300px; }
.faq-a-inner{ padding:0 4px 18px; }

/* ---------- Footer ---------- */
footer{ border-top:1px solid var(--line); padding:36px 0 60px; margin-top:20px; }
.footer-grid{ display:flex; flex-wrap:wrap; justify-content:space-between; gap:24px; }
.footer-note{ font-size:.78rem; color:var(--ink-soft); max-width:60ch; line-height:1.6; }
.footer-links{ display:flex; gap:16px; flex-wrap:wrap; font-size:.82rem; }
.footer-links a{ text-decoration:none; color:var(--ink-soft); }
.footer-links a:hover{ color:var(--river); }

/* ---------- About / author credit ---------- */
.about-card{
  background:var(--surface); border:1px solid var(--line); border-radius:var(--radius-l);
  padding:26px 24px;
}
.about-card p{ color:var(--ink-soft); line-height:1.7; margin:0 0 14px; }
.about-card p:last-of-type{ margin-bottom:20px; }
.author-credit{
  display:flex; align-items:center; gap:12px;
  border-top:1px solid var(--line); padding-top:18px;
}
.author-avatar{
  flex:none; width:42px; height:42px; border-radius:50%;
  background:linear-gradient(135deg, var(--river), var(--lotus));
  color:#fff; display:flex; align-items:center; justify-content:center;
  font-family:var(--font-display); font-weight:600; font-size:.9rem;
}
.author-name{ font-weight:700; font-size:.92rem; }
.author-credit a{ font-size:.84rem; color:var(--river-deep); text-decoration:none; }
html.dark .author-credit a{ color:var(--river); }
.author-credit a:hover{ text-decoration:underline; }

.footer-credit{ font-size:.8rem; color:var(--ink-soft); margin:10px 0 0; }
.footer-credit a{ color:var(--gold-ink); font-weight:700; text-decoration:none; }
html.dark .footer-credit a{ color:var(--gold); }
.footer-credit a:hover{ text-decoration:underline; }

/* ---------- Toast ---------- */
.toast{
  position:fixed; left:50%; bottom:26px; transform:translateX(-50%) translateY(20px);
  background:var(--ink); color:var(--bg); padding:12px 20px; border-radius:999px;
  font-size:.85rem; font-weight:600; opacity:0; pointer-events:none; transition:all .25s ease; z-index:200;
  display:flex; align-items:center; gap:8px; box-shadow:var(--shadow);
}
html.dark .toast{ background:var(--gold); color:#231A08; }
.toast.show{ opacity:1; transform:translateX(-50%) translateY(0); }

/* ---------- Install banner ---------- */
.install-banner{
  display:none; align-items:center; gap:12px; background:var(--bg-alt); border:1px solid var(--line);
  border-radius:var(--radius-m); padding:12px 16px; margin-top:18px;
}
.install-banner.show{ display:flex; }
.install-banner p{ margin:0; font-size:.84rem; flex:1; }

/* ---------- Skeleton ---------- */
.skeleton{ background:linear-gradient(90deg, var(--bg-alt) 25%, var(--line) 37%, var(--bg-alt) 63%); background-size:400% 100%; animation:shimmer 1.4s ease infinite; border-radius:8px; }
@keyframes shimmer{ 0%{background-position:100% 50%;} 100%{background-position:0 50%;} }

::-webkit-scrollbar{ width:10px; height:10px; }
::-webkit-scrollbar-thumb{ background:var(--line); border-radius:99px; }