/* Design language borrowed from wc26.watch:
   deep teal→navy gradient bg, glass cards, orange #FF6A2B accent,
   gold #FFC23D brand gradient, slate grays. */

:root {
  --accent: #FF6A2B;
  --accent-soft: rgba(255, 106, 43, .16);
  --accent-glow: rgba(255, 106, 43, .35);
  --gold: #FFC23D;
  --green: #22c55e;
  --green-soft: rgba(34, 197, 94, .16);
  --red: #ef4444;
  --red-soft: rgba(239, 68, 68, .16);

  --ink: #f1f5f9;
  --muted: #94a3b8;
  --faint: #64748b;

  --glass: rgba(255, 255, 255, .07);
  --glass-bd: rgba(255, 255, 255, .14);
  --glass-hi: rgba(255, 255, 255, .16);

  --radius: 16px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { height: 100%; }
body {
  min-height: 100%;
  color: var(--ink);
  font: 15px/1.5 "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI",
       Inter, Roboto, sans-serif;
  background: linear-gradient(165deg, #0A2A24 0%, #0C1F2E 40%, #0A0F18 75%, #080A0E 100%)
              fixed;
  padding-bottom: 32px;
  -webkit-font-smoothing: antialiased;
}

/* ---------- header / brand ---------- */
header { padding: 18px 16px 0; }
.brand { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 10px; flex: none;
  background: linear-gradient(135deg, var(--accent), var(--gold));
  display: grid; place-items: center;
  color: #fff; font-weight: 800; font-size: 18px;
  box-shadow: 0 4px 18px var(--accent-glow);
}
h1 { font-size: 19px; font-weight: 700; letter-spacing: -.02em; }
h1 small { display: block; font-size: 11.5px; font-weight: 500; color: var(--muted); letter-spacing: 0; }
#help-btn {
  margin-left: auto; width: 30px; height: 30px; border-radius: 50%;
  background: var(--glass); border: 1px solid var(--glass-bd);
  color: var(--muted); font-weight: 700; cursor: pointer; font-size: 14px;
}

/* ---------- tabs (wc26-style pill bar) ---------- */
#tabs {
  display: flex; gap: 4px; padding: 4px;
  background: var(--glass); border: 1px solid var(--glass-bd);
  border-radius: 14px; backdrop-filter: blur(12px);
}
.tab {
  flex: 1; background: none; border: none; color: var(--muted);
  font: inherit; font-size: 14px; font-weight: 600; padding: 8px 0;
  border-radius: 10px; cursor: pointer; transition: all .18s ease;
}
.tab.active {
  color: #fff; background: linear-gradient(135deg, var(--accent), #ff8a4d);
  box-shadow: 0 2px 14px var(--accent-glow);
}

main { padding: 14px 16px; }
.hidden { display: none !important; }

/* ---------- category chips ---------- */
.chips { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 4px;
  margin-bottom: 12px; scrollbar-width: none; }
.chips::-webkit-scrollbar { display: none; }
.chip {
  flex: none; background: var(--glass); border: 1px solid var(--glass-bd);
  color: var(--muted); padding: 6px 14px; border-radius: 999px;
  font: inherit; font-size: 12.5px; font-weight: 600; cursor: pointer;
  text-transform: capitalize; transition: all .15s ease;
}
.chip.active {
  background: var(--accent-soft); border-color: var(--accent);
  color: var(--accent);
}

/* ---------- glass cards ---------- */
.cards { display: flex; flex-direction: column; gap: 10px; }
.card {
  position: relative; overflow: hidden;
  background: var(--glass); border: 1px solid var(--glass-bd);
  border-radius: var(--radius); padding: 14px;
  backdrop-filter: blur(12px); cursor: pointer;
  transition: transform .12s ease, border-color .12s ease;
}
.card:active { transform: scale(.98); border-color: var(--accent-glow); }
.card::before {  /* wc26 glass top-highlight */
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, var(--glass-hi), transparent 40%);
  opacity: .35; pointer-events: none;
}
.card .title {
  font-weight: 600; font-size: 13.5px; margin-bottom: 8px; color: var(--ink);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden;
}
.card .row { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.card .row + .row { margin-top: 8px; }
.price { font-size: 19px; font-weight: 800; letter-spacing: -.02em; }
.price .cur { font-size: 12px; font-weight: 600; color: var(--muted); margin-right: 2px; }

.badge {
  font-size: 11.5px; font-weight: 700; padding: 4px 10px; border-radius: 999px;
  background: var(--green-soft); color: var(--green);
  border: 1px solid rgba(34,197,94,.35);
}
.badge.up { background: var(--red-soft); color: var(--red); border-color: rgba(239,68,68,.35); }
.badge.warm {
  background: rgba(255,194,61,.12); color: var(--gold);
  border-color: rgba(255,194,61,.3); font-weight: 600;
}
.cat { font-size: 11.5px; color: var(--faint); text-transform: capitalize;
  background: rgba(255,255,255,.05); padding: 3px 9px; border-radius: 999px; }
.untrack {
  background: none; border: 1px solid var(--glass-bd); border-radius: 999px;
  color: var(--faint); font: inherit; font-size: 11px; padding: 3px 10px; cursor: pointer;
}
.untrack:active { color: var(--red); border-color: var(--red); }
.empty { color: var(--muted); text-align: center; padding: 44px 20px; font-size: 13.5px; }
.empty .big { display: block; font-size: 30px; margin-bottom: 10px; }

/* ---------- track form ---------- */
#track-form { display: flex; gap: 8px; margin-bottom: 14px; }
#track-input { flex: 1; min-width: 0; }
#track-pct { width: 62px; text-align: center; }
input {
  background: var(--glass); border: 1px solid var(--glass-bd);
  border-radius: 12px; color: var(--ink); padding: 11px 13px;
  font: inherit; font-size: 13.5px; outline: none; transition: border-color .15s;
}
input::placeholder { color: var(--faint); }
input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
#track-form button {
  background: linear-gradient(135deg, var(--accent), #ff8a4d);
  color: #fff; border: none; border-radius: 12px; padding: 0 18px;
  font: inherit; font-weight: 700; font-size: 14px; cursor: pointer;
  box-shadow: 0 2px 14px var(--accent-glow);
}
#track-form button:active { transform: scale(.97); }

/* ---------- product detail ---------- */
#back-btn {
  background: none; border: none; color: var(--accent); font: inherit;
  font-size: 14px; font-weight: 600; cursor: pointer; padding: 0 0 12px;
}
#view-product h2 { font-size: 16px; font-weight: 700; margin-bottom: 6px; letter-spacing: -.01em; }
.meta { color: var(--muted); font-size: 12.5px; margin-bottom: 12px; }
.chart-wrap {
  background: var(--glass); border: 1px solid var(--glass-bd);
  border-radius: var(--radius); padding: 12px; backdrop-filter: blur(12px);
}
#chart { width: 100%; height: 190px; display: block; }
#chart-legend { margin: 10px 2px 0; display: flex; gap: 14px; flex-wrap: wrap; }
#chart-legend span { font-size: 12px; color: var(--muted); }
#chart-legend b { color: var(--ink); font-weight: 700; }

/* ---------- stat strip (product page) ---------- */
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 12px; }
.stat {
  background: var(--glass); border: 1px solid var(--glass-bd);
  border-radius: 12px; padding: 10px; text-align: center;
}
.stat .v { font-size: 15px; font-weight: 800; }
.stat .k { font-size: 10.5px; color: var(--faint); text-transform: uppercase;
  letter-spacing: .06em; margin-top: 2px; }

/* ---------- onboarding / tutorial ---------- */
#onboard {
  position: fixed; inset: 0; z-index: 50;
  background: rgba(5, 8, 12, .8); backdrop-filter: blur(8px);
  display: grid; place-items: end center; padding: 16px;
}
.sheet {
  width: 100%; max-width: 420px;
  background: linear-gradient(180deg, #10202b, #0b131c);
  border: 1px solid var(--glass-bd); border-radius: 22px; padding: 24px 20px;
  animation: rise .28s ease;
}
@keyframes rise { from { transform: translateY(24px); opacity: 0; } }
.sheet .step-art {
  font-size: 40px; text-align: center; margin-bottom: 14px;
  filter: drop-shadow(0 4px 18px var(--accent-glow));
}
.sheet h3 { font-size: 18px; font-weight: 800; text-align: center; margin-bottom: 8px; }
.sheet p { color: var(--muted); font-size: 13.5px; text-align: center; margin-bottom: 20px; }
.dots { display: flex; gap: 6px; justify-content: center; margin-bottom: 18px; }
.dot { width: 6px; height: 6px; border-radius: 50%; background: var(--faint); transition: all .2s; }
.dot.active { width: 18px; border-radius: 3px; background: var(--accent); }
.sheet-btns { display: flex; gap: 10px; }
.sheet-btns .ghost {
  flex: 1; background: var(--glass); border: 1px solid var(--glass-bd);
  color: var(--muted); border-radius: 12px; padding: 12px 0;
  font: inherit; font-weight: 600; cursor: pointer;
}
.sheet-btns .cta {
  flex: 2; background: linear-gradient(135deg, var(--accent), var(--gold));
  border: none; color: #fff; border-radius: 12px; padding: 12px 0;
  font: inherit; font-weight: 800; font-size: 14.5px; cursor: pointer;
  box-shadow: 0 4px 20px var(--accent-glow);
}

/* ---------- section heads / top deals ---------- */
.section-head {
  display: flex; align-items: center; justify-content: space-between;
  margin: 4px 2px 10px;
}
.section-head h2 { font-size: 14.5px; font-weight: 800; letter-spacing: -.01em; }
.hint-txt { font-size: 11px; color: var(--faint); }
#top-deals { margin-bottom: 18px; }
.rank {
  position: absolute; top: 0; right: 0; padding: 4px 10px;
  border-radius: 0 var(--radius) 0 12px; font-size: 11px; font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--gold)); color: #fff;
}
#cats-sheet {
  position: fixed; inset: 0; z-index: 40;
  background: rgba(5, 8, 12, .8); backdrop-filter: blur(8px);
  display: grid; place-items: end center; padding: 16px;
}
#cats-sheet h3 { font-size: 17px; font-weight: 800; margin-bottom: 8px; }
#cats-sheet p { color: var(--muted); font-size: 13px; margin-bottom: 16px; }
.chips.wrap { flex-wrap: wrap; overflow: visible; margin-bottom: 18px; }

/* skeleton shimmer while loading */
.skel { height: 84px; border-radius: var(--radius);
  background: linear-gradient(90deg, var(--glass) 25%, rgba(255,255,255,.12) 50%, var(--glass) 75%);
  background-size: 200% 100%; animation: shimmer 1.2s infinite; border: 1px solid var(--glass-bd); }
@keyframes shimmer { to { background-position: -200% 0; } }