/* =========================================================
   BDG Mobile Help — Premium Help Center
   Mobile-first · dark luxury · gold gradient accents
   ========================================================= */

:root {
  /* palette */
  --bg-0: #07060a;
  --bg-1: #0f0c14;
  --bg-2: #171220;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-2: rgba(255, 255, 255, 0.06);
  --line: rgba(255, 218, 132, 0.14);
  --line-strong: rgba(255, 218, 132, 0.28);

  --gold: #f2c85a;
  --gold-2: #ffe7a0;
  --gold-deep: #b98527;
  --gold-grad: linear-gradient(135deg, #ffe7a0 0%, #f2c85a 45%, #b98527 100%);
  --gold-soft: linear-gradient(135deg, rgba(255, 231, 160, 0.18), rgba(185, 133, 39, 0.08));

  --text: #f6efdc;
  --text-strong: #ffffff;
  --muted: #a89b7e;
  --muted-2: #7d735e;
  --danger: #ff7a7a;
  --success: #6ee7a5;

  /* elevation */
  --shadow-sm: 0 6px 18px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 18px 40px rgba(0, 0, 0, 0.45);
  --shadow-gold: 0 14px 40px rgba(242, 200, 90, 0.22);

  /* radius */
  --r-sm: 12px;
  --r-md: 18px;
  --r-lg: 24px;
  --r-xl: 28px;

  --shell-max: 430px;
  --nav-h: 76px;

  font-family: 'Manrope', ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
}

/* ---------- reset ---------- */
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; padding: 0; }
html { background: var(--bg-0); }
body {
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 50% -10%, rgba(242, 200, 90, 0.10), transparent 60%),
    radial-gradient(800px 500px at 100% 100%, rgba(185, 133, 39, 0.08), transparent 60%),
    linear-gradient(180deg, var(--bg-1) 0%, var(--bg-0) 100%);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button, input { font: inherit; color: inherit; }
button { cursor: pointer; }
h1, h2, h3 { margin: 0; }

/* ---------- app shell ---------- */
.phone-shell {
  width: 100%;
  max-width: var(--shell-max);
  min-height: 100vh;
  margin: 0 auto;
  padding: 14px 16px calc(var(--nav-h) + 24px);
  background: linear-gradient(180deg, rgba(23, 18, 32, 0.85), rgba(15, 12, 20, 0.9));
  position: relative;
}

/* ---------- 1. Header ---------- */
.app-header {
  position: sticky; top: 0; z-index: 20;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 10px 4px 14px;
  background: linear-gradient(180deg, rgba(15, 12, 20, 0.96) 70%, rgba(15, 12, 20, 0));
  backdrop-filter: blur(10px);
}
.brand-pill { display: flex; align-items: center; gap: 10px; min-width: 0; }
.logo {
  flex: 0 0 auto;
  width: 42px; height: 42px;
  display: grid; place-items: center;
  border-radius: 13px;
  background: var(--gold-grad);
  color: #1a1206;
  font-weight: 900; font-size: 14px; letter-spacing: 0.02em;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.6), var(--shadow-gold);
}
.brand-text { min-width: 0; }
.brand-text strong {
  display: block;
  font-weight: 800; font-size: 15px; letter-spacing: -0.01em;
  color: var(--text-strong);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.brand-text small {
  display: flex; align-items: center; gap: 6px;
  color: var(--muted); font-size: 11px; font-weight: 600;
}
.dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 8px rgba(110, 231, 165, 0.7);
}
.support-btn {
  flex: 0 0 auto;
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 14px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: var(--gold-soft);
  color: var(--gold-2);
  font-size: 12px; font-weight: 800;
  white-space: nowrap;
}
.support-btn:active { transform: scale(0.97); }

/* ---------- 2. Hero + search ---------- */
.hero-card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  padding: 20px 18px 18px;
  background:
    radial-gradient(120% 80% at 100% 0%, rgba(242, 200, 90, 0.20), transparent 55%),
    linear-gradient(160deg, #2a1f10 0%, #14100a 60%, #0f0c14 100%);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}
.hero-card::before {
  content: ""; position: absolute; inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(255, 231, 160, 0.5), rgba(255, 231, 160, 0) 60%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  pointer-events: none;
}
.eyebrow {
  margin: 0 0 10px;
  font-size: 10px; font-weight: 900; letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold-2);
}
.hero-card h1 {
  font-size: 26px; line-height: 1.1; letter-spacing: -0.03em;
  color: var(--text-strong);
  font-weight: 800;
}
.hero-sub {
  margin: 8px 0 16px;
  color: var(--muted);
  font-size: 13px; line-height: 1.5;
}
.search-box {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center; gap: 4px;
  padding: 6px 6px 6px 12px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(0, 0, 0, 0.4);
}
.search-icon { color: var(--muted); font-size: 14px; }
.search-box input {
  min-width: 0;
  border: 0; outline: 0; background: transparent;
  padding: 12px 8px; font-size: 14px;
}
.search-box input::placeholder { color: var(--muted-2); }
.search-box button {
  border: 0; border-radius: 12px;
  padding: 10px 14px;
  background: var(--gold-grad);
  color: #1a1206; font-weight: 900; font-size: 13px;
  box-shadow: var(--shadow-gold);
}
.search-box button:active { transform: scale(0.97); }

/* quick chips */
.chips {
  display: flex; gap: 8px;
  margin-top: 14px;
  overflow-x: auto;
  scrollbar-width: none;
  padding-bottom: 2px;
}
.chips::-webkit-scrollbar { display: none; }
.chip {
  flex: 0 0 auto;
  padding: 9px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  font-size: 12px; font-weight: 700;
  transition: transform 0.15s ease;
}
.chip:active { transform: scale(0.96); }
.chip:hover { border-color: var(--line-strong); }

/* ---------- sections ---------- */
.section { margin-top: 22px; }
.section-title {
  display: flex; justify-content: space-between; align-items: center;
  margin: 0 2px 12px;
}
.section-title h2 {
  font-size: 16px; font-weight: 800; letter-spacing: -0.01em;
  color: var(--text-strong);
}
.ghost-btn {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--gold-2);
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 11px; font-weight: 800;
}

/* ---------- 3. Popular help ---------- */
.popular-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.pop-card {
  text-align: left;
  padding: 14px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: var(--gold-soft);
  color: var(--text);
  display: grid;
  gap: 4px;
  min-height: 108px;
  transition: transform 0.15s ease, border-color 0.15s ease;
}
.pop-card:hover { border-color: var(--line-strong); }
.pop-card:active { transform: scale(0.98); }
.pop-icon {
  width: 36px; height: 36px;
  display: grid; place-items: center;
  border-radius: 10px;
  background: var(--gold-grad);
  color: #1a1206;
  font-size: 18px;
  margin-bottom: 6px;
  box-shadow: var(--shadow-gold);
}
.pop-card strong { font-size: 14px; font-weight: 800; color: var(--text-strong); }
.pop-card small { color: var(--muted); font-size: 11px; line-height: 1.35; }

/* ---------- topics (backend categories) ---------- */
.topic-scroll {
  display: flex; gap: 8px;
  overflow-x: auto; scrollbar-width: none;
  padding-bottom: 2px;
}
.topic-scroll::-webkit-scrollbar { display: none; }
.topic {
  flex: 0 0 auto;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  font-size: 12px; font-weight: 700;
}
.topic b { font-style: normal; font-weight: 900; }
.topic.active {
  color: #1a1206;
  background: var(--gold-grad);
  border-color: transparent;
  box-shadow: var(--shadow-gold);
}

/* ---------- 4. Guide list ---------- */
.guide-list { display: grid; gap: 12px; }
.guide-card {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  gap: 12px;
  padding: 10px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(255, 231, 160, 0.06), rgba(255, 255, 255, 0.03));
  transition: transform 0.15s ease, border-color 0.15s ease;
  cursor: pointer;
}
.guide-card:hover { border-color: var(--line-strong); }
.guide-card:active { transform: scale(0.99); }
.guide-thumb {
  min-height: 100px;
  border-radius: 14px;
  overflow: hidden;
  background: linear-gradient(135deg, #4a3410, #171018);
  display: grid; place-items: center;
}
.guide-thumb img {
  width: 100%; height: 100%;
  min-height: 100px;
  object-fit: cover; display: block;
}
.thumb-fallback { font-size: 34px; }
.guide-info { min-width: 0; padding: 4px 4px 4px 0; display: grid; align-content: start; gap: 6px; }
.badge {
  display: inline-flex; align-self: start;
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: rgba(242, 200, 90, 0.12);
  color: var(--gold-2);
  font-size: 10px; font-weight: 800;
  letter-spacing: 0.02em;
}
.guide-info h3 {
  font-size: 15px; font-weight: 800; line-height: 1.2;
  color: var(--text-strong);
}
.guide-info p {
  margin: 0;
  color: var(--muted);
  font-size: 12px; line-height: 1.4;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.guide-info small {
  color: var(--muted-2); font-size: 10px; font-weight: 700;
}

/* ---------- 5. FAQ ---------- */
.faq-filter {
  display: flex; gap: 6px;
  overflow-x: auto; scrollbar-width: none;
  margin-bottom: 10px;
}
.faq-filter::-webkit-scrollbar { display: none; }
.faq-tab {
  flex: 0 0 auto;
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--muted);
  font-size: 11px; font-weight: 700;
}
.faq-tab.active { color: #1a1206; background: var(--gold-grad); border-color: transparent; }

.faq-list { display: grid; gap: 8px; }
.faq {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--surface);
  overflow: hidden;
  transition: border-color 0.15s ease;
}
.faq[open] { border-color: var(--line-strong); background: var(--surface-2); }
.faq summary {
  list-style: none;
  cursor: pointer;
  padding: 14px 16px;
  font-weight: 700; font-size: 13px;
  color: var(--text-strong);
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  color: var(--gold-2); font-weight: 900; font-size: 18px;
  transition: transform 0.2s ease;
}
.faq[open] summary::after { content: "−"; }
.faq p {
  margin: 0;
  padding: 0 16px 14px;
  color: var(--muted);
  line-height: 1.55;
  font-size: 13px;
}

/* ---------- shared states: loading / empty / error ---------- */
.skeleton {
  border-radius: var(--r-md);
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.04) 0%, rgba(255, 255, 255, 0.09) 50%, rgba(255, 255, 255, 0.04) 100%);
  background-size: 200% 100%;
  animation: shimmer 1.4s ease-in-out infinite;
  border: 1px solid var(--line);
}
.skeleton.guide { height: 124px; }
.skeleton.faq { height: 52px; margin-bottom: 8px; }
.skeleton.chip-row { height: 36px; }
@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.state {
  padding: 24px 18px;
  text-align: center;
  border-radius: var(--r-md);
  border: 1px dashed var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: var(--muted);
  font-size: 13px; line-height: 1.5;
  display: grid; gap: 8px;
}
.state .state-icon {
  font-size: 32px;
  margin: 0 auto 4px;
  width: 56px; height: 56px;
  display: grid; place-items: center;
  border-radius: 16px;
  background: var(--gold-soft);
  border: 1px solid var(--line);
}
.state strong { color: var(--text-strong); font-weight: 800; font-size: 14px; }
.state.error { border-color: rgba(255, 122, 122, 0.4); background: rgba(255, 122, 122, 0.06); color: #ffb3b3; }
.state.error .state-icon { background: rgba(255, 122, 122, 0.12); border-color: rgba(255, 122, 122, 0.3); color: #ffb3b3; }
.state button {
  margin-top: 6px; justify-self: center;
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: var(--gold-grad);
  color: #1a1206; font-weight: 800; font-size: 12px;
}

/* footnote */
.footnote {
  margin-top: 26px; padding: 8px 0 4px;
  text-align: center;
  color: var(--muted-2);
  font-size: 11px; letter-spacing: 0.06em;
}

/* ---------- 6. Bottom navigation ---------- */
.bottom-nav {
  position: fixed; bottom: 0; left: 50%;
  transform: translateX(-50%);
  z-index: 30;
  width: 100%; max-width: var(--shell-max);
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 4px;
  padding: 10px 8px max(10px, env(safe-area-inset-bottom));
  background: rgba(11, 9, 14, 0.85);
  backdrop-filter: blur(18px);
  border-top: 1px solid var(--line);
}
.nav-item {
  display: grid; place-items: center; gap: 3px;
  padding: 6px 4px;
  border-radius: 14px;
  color: var(--muted);
  font-size: 18px;
  transition: color 0.15s ease, background 0.15s ease;
}
.nav-item .nav-label { font-size: 10px; font-weight: 800; letter-spacing: 0.02em; }
.nav-item:active { transform: scale(0.96); }
.nav-item.active { color: var(--gold-2); background: var(--gold-soft); }

/* ---------- dialog ---------- */
dialog {
  border: 0; padding: 0;
  border-radius: var(--r-xl) var(--r-xl) 0 0;
  width: 100%; max-width: var(--shell-max);
  max-height: 90vh;
  margin: auto auto 0;
  color: var(--text);
  background: linear-gradient(180deg, #181120 0%, #0f0c14 100%);
  box-shadow: 0 -18px 60px rgba(0, 0, 0, 0.7);
}
dialog::backdrop { background: rgba(0, 0, 0, 0.7); backdrop-filter: blur(4px); }
.close {
  position: sticky; top: 12px; float: right;
  margin: 12px;
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.55);
  color: var(--gold-2);
  font-size: 24px; font-weight: 700;
  z-index: 2;
}
#guideArticle { padding: 22px 18px 32px; clear: both; }
.article-head .badge { margin-bottom: 10px; }
.article-head h2 {
  font-size: 24px; line-height: 1.15; letter-spacing: -0.02em;
  color: var(--text-strong); font-weight: 800;
}
.article-head p { color: var(--muted); line-height: 1.55; font-size: 13px; margin: 8px 0 0; }
.article-images { display: grid; gap: 10px; margin: 16px 0; }
.article-images img {
  width: 100%; border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: #0a0810;
}
.no-image {
  padding: 24px; text-align: center;
  color: var(--muted);
  border: 1px dashed var(--line); border-radius: var(--r-md);
}
.article-body {
  white-space: pre-wrap; line-height: 1.75; font-size: 13.5px;
  color: #eadfc4;
}

/* ---------- >430px: framed phone look on tablets/desktop ---------- */
@media (min-width: 640px) {
  body { padding: 24px 0 40px; }
  .phone-shell {
    border-radius: 32px;
    min-height: calc(100vh - 64px);
    box-shadow: 0 40px 80px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(255, 255, 255, 0.04);
    overflow: hidden;
  }
  .bottom-nav { border-radius: 24px 24px 0 0; }
}