* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }

:root {
  --bg: #0a0c10;
  --surface: #13161c;
  --surface-2: #1a1e26;
  --border: #232833;
  --text: #eef1f5;
  --muted: #8a92a0;
  --silver: #c8ccd2;
  --silver-hi: #e8eaed;
  --gold: #d4a857;
  --up: #4ade80;
  --down: #f87171;
  --radius: 16px;
  --radius-sm: 12px;
}

html, body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  min-height: 100dvh;
}

body {
  display: flex;
  flex-direction: column;
  padding: env(safe-area-inset-top) 0 env(safe-area-inset-bottom);
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(200,204,210,0.08), transparent),
    radial-gradient(ellipse 60% 40% at 100% 100%, rgba(212,168,87,0.05), transparent),
    var(--bg);
}

/* HEADER */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: inherit; }

.brand-mark {
  width: 32px; height: 32px; border-radius: 10px;
  background: linear-gradient(135deg, #f0f2f5 0%, #a8adb5 45%, #5e6269 100%);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.4), inset 0 -1px 0 rgba(0,0,0,0.3), 0 2px 8px rgba(0,0,0,0.4);
  position: relative; overflow: hidden; flex-shrink: 0;
}

.brand-mark::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(255,255,255,0.25) 50%, transparent 60%);
}

.brand-name { font-size: 13px; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; line-height: 1.1; }
.brand-name span { display: block; font-size: 9px; font-weight: 500; letter-spacing: 2.5px; color: var(--muted); margin-top: 2px; }

.live-badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 10px; font-weight: 600; letter-spacing: 1px; text-transform: uppercase;
  color: var(--up); padding: 5px 10px;
  border: 1px solid rgba(74,222,128,0.25);
  background: rgba(74,222,128,0.08);
  border-radius: 999px;
}

.live-dot {
  width: 6px; height: 6px; border-radius: 50%; background: var(--up);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(74,222,128,0.6); }
  70%  { box-shadow: 0 0 0 8px rgba(74,222,128,0); }
  100% { box-shadow: 0 0 0 0 rgba(74,222,128,0); }
}

/* HERO */
.hero { padding: 28px 20px 20px; text-align: left; }

.hero h1 {
  font-size: 26px; font-weight: 800; letter-spacing: -0.8px; line-height: 1.15; margin-bottom: 8px;
}

.hero h1 .grad {
  background: linear-gradient(135deg, #f0f2f5 0%, #a8adb5 60%, #6b7079 100%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}

.hero p { font-size: 13px; color: var(--muted); line-height: 1.5; }

/* MAIN */
.main { flex: 1; padding: 0 16px 24px; max-width: 560px; width: 100%; margin: 0 auto; }

/* PRICE CARD */
.price-card {
  position: relative;
  background: linear-gradient(180deg, var(--surface-2) 0%, var(--surface) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 12px;
  overflow: hidden;
}

.price-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--silver), transparent);
  opacity: 0.5;
}

.price-card.gold::before {
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: 0.7;
}

.card-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.metal { display: flex; align-items: center; gap: 10px; }

.metal-icon {
  width: 36px; height: 36px; border-radius: 10px;
  display: grid; place-items: center;
  font-size: 14px; font-weight: 800; color: #0a0c10; flex-shrink: 0;
}

.metal-icon.gold { background: linear-gradient(135deg, #f0d896 0%, #d4a857 50%, #8f6d2d 100%); }
.metal-icon.silver { background: linear-gradient(135deg, #e8eaed 0%, #a8adb5 50%, #5e6269 100%); }

.metal-label { font-size: 11px; font-weight: 600; letter-spacing: 1.5px; text-transform: uppercase; color: var(--muted); }
.metal-sub { font-size: 13px; font-weight: 600; color: var(--text); margin-top: 2px; }

.trend-badge { font-size: 11px; font-weight: 700; padding: 5px 10px; border-radius: 999px; letter-spacing: 0.5px; }
.trend-badge.up { color: var(--up); background: rgba(74,222,128,0.1); border: 1px solid rgba(74,222,128,0.2); }
.trend-badge.down { color: var(--down); background: rgba(248,113,113,0.1); border: 1px solid rgba(248,113,113,0.2); }

.price-main {
  font-size: 30px; font-weight: 800; letter-spacing: -1px; line-height: 1.1;
  margin-bottom: 4px; font-variant-numeric: tabular-nums;
}

.price-main .unit { font-size: 14px; font-weight: 500; color: var(--muted); letter-spacing: 0; margin-left: 4px; }

.price-sub {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 12px; color: var(--muted); margin-top: 12px; padding-top: 12px;
  border-top: 1px dashed var(--border);
}

.price-sub strong { color: var(--text); font-weight: 600; font-variant-numeric: tabular-nums; }

/* SKELETON */
.skeleton {
  background: linear-gradient(90deg, var(--surface) 25%, var(--surface-2) 50%, var(--surface) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
  border-radius: 6px;
  color: transparent !important;
}

@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* SUPPLIER SECTION */
.supplier-section { margin-top: 32px; }

.section-head { margin-bottom: 16px; }
.section-head h2 { font-size: 18px; font-weight: 800; letter-spacing: -0.4px; margin-bottom: 4px; }
.section-head p { font-size: 12px; color: var(--muted); }

.supplier-list { display: flex; flex-direction: column; gap: 10px; }

.supplier-card {
  background: linear-gradient(180deg, var(--surface-2) 0%, var(--surface) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  position: relative;
  overflow: hidden;
}

.supplier-card::before {
  content: ""; position: absolute; top: 0; left: 0; bottom: 0; width: 3px;
  background: linear-gradient(180deg, var(--silver-hi), var(--silver));
  opacity: 0.6;
}

.supplier-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 12px;
}

.supplier-name { font-size: 14px; font-weight: 700; letter-spacing: 0.3px; }

.supplier-tag {
  font-size: 10px; font-weight: 600; letter-spacing: 1px; text-transform: uppercase;
  color: var(--muted); padding: 3px 8px;
  border: 1px solid var(--border); border-radius: 999px;
}

.supplier-prices { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.supplier-price-block { }
.supplier-price-label {
  font-size: 10px; font-weight: 600; letter-spacing: 1.2px; text-transform: uppercase;
  color: var(--muted); margin-bottom: 4px;
}
.supplier-price-value {
  font-size: 18px; font-weight: 700; letter-spacing: -0.3px;
  font-variant-numeric: tabular-nums;
}
.supplier-price-value.buyback { color: var(--silver-hi); }

/* BUTTON + STATUS */
.refresh-btn {
  width: 100%; margin-top: 20px; padding: 14px;
  background: var(--silver-hi); color: var(--bg);
  border: none; border-radius: var(--radius-sm);
  font-family: inherit; font-size: 13px; font-weight: 700;
  letter-spacing: 1px; text-transform: uppercase; cursor: pointer;
  transition: transform 0.15s, opacity 0.15s;
}

.refresh-btn:active { transform: scale(0.98); }
.refresh-btn:disabled { opacity: 0.5; cursor: wait; }

.status-bar { text-align: center; font-size: 11px; color: var(--muted); margin-top: 12px; letter-spacing: 0.3px; }

/* ERROR */
.error-box {
  background: rgba(248,113,113,0.08);
  border: 1px solid rgba(248,113,113,0.25);
  color: var(--down);
  padding: 16px; border-radius: var(--radius-sm);
  font-size: 13px; text-align: center; line-height: 1.5;
}

/* FOOTER */
.site-footer {
  padding: 24px 20px 32px; text-align: center;
  font-size: 12px; color: var(--muted); line-height: 1.7;
  border-top: 1px solid var(--border); margin-top: auto;
}

.site-footer .credit {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 600; color: var(--text); text-decoration: none;
  padding: 8px 14px; border: 1px solid var(--border); border-radius: 999px;
  background: var(--surface); transition: border-color 0.2s;
}

.site-footer .credit:hover { border-color: var(--silver); }

.site-footer .credit-mark {
  width: 16px; height: 16px; border-radius: 5px;
  background: linear-gradient(135deg, #f0f2f5 0%, #a8adb5 50%, #5e6269 100%);
}

.site-footer .source { display: block; margin-top: 14px; font-size: 11px; }
.site-footer .source a { color: var(--muted); text-decoration: none; border-bottom: 1px solid var(--border); }
.site-footer .source a:hover { color: var(--silver); border-bottom-color: var(--silver); }

/* DESKTOP */
@media (min-width: 640px) {
  .header { padding: 20px 32px; }
  .hero { padding: 36px 32px 24px; max-width: 640px; margin: 0 auto; width: 100%; }
  .hero h1 { font-size: 34px; }
  .main { padding: 0 24px 32px; }
  .price-card { padding: 24px; }
  .price-main { font-size: 36px; }
}

@media (min-width: 900px) {
  .hero h1 { font-size: 40px; }
  .main { max-width: 640px; }
}