:root {
  --bg-0: #05080f;
  --bg-1: #0a0f1e;
  --bg-2: #0e1530;
  --text: #f3f7fd;
  --text-2: #aebbd1;
  --muted: #7d8aa3;
  --faint: #56627b;
  --hair: rgba(255, 255, 255, 0.09);
  --hair-2: rgba(255, 255, 255, 0.14);
  --glass: rgba(146, 170, 220, 0.06);
  --glass-2: rgba(160, 184, 235, 0.1);
  --accent: #5cd0ff;
  --accent-2: #7c8cff;
  --violet: #b69bff;
  --pass: #43dd9b;
  --warn: #fbc04a;
  --fail: #ff6b75;
  --radius: 20px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  /* Solid dark base: covers the first paint and the iOS rubber-band overscroll
     area (which reveals the html background, not body) so it never flashes white. */
  background-color: var(--bg-0);
  overscroll-behavior-y: none;
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100svh;
  color: var(--text);
  font-family:
    -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, Helvetica, Arial,
    sans-serif;
  -webkit-font-smoothing: antialiased;
  letter-spacing: 0.01em;
  /* Solid base color (no flash before the gradient layer paints). */
  background-color: var(--bg-0);
  padding: env(safe-area-inset-top) calc(16px + env(safe-area-inset-right))
    calc(34px + env(safe-area-inset-bottom)) calc(16px + env(safe-area-inset-left));
}

/* Premium gradient lives on a fixed full-viewport layer instead of
   background-attachment: fixed (which is janky/flashy on iOS). It always covers
   the visible viewport; overscroll reveals the matching dark html background. */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(1100px 620px at 8% -8%, rgba(124, 140, 255, 0.2), transparent 58%),
    radial-gradient(960px 520px at 116% 2%, rgba(92, 208, 255, 0.16), transparent 54%),
    radial-gradient(880px 640px at 50% 118%, rgba(182, 155, 255, 0.14), transparent 60%),
    linear-gradient(180deg, var(--bg-1) 0%, var(--bg-0) 70%);
}

.app {
  max-width: 540px;
  margin: 0 auto;
  display: grid;
  gap: 14px;
  padding-top: 14px;
}

/* --- Hero ------------------------------------------------------------------ */
.hero {
  position: sticky;
  top: env(safe-area-inset-top);
  z-index: 6;
  display: grid;
  gap: 14px;
  padding: 18px 18px 16px;
  border-radius: 26px;
  background: linear-gradient(155deg, rgba(255, 255, 255, 0.13), rgba(255, 255, 255, 0.03) 55%);
  border: 1px solid var(--hair-2);
  box-shadow:
    0 18px 50px rgba(0, 0, 0, 0.55),
    inset 0 1px 0 rgba(255, 255, 255, 0.18);
  -webkit-backdrop-filter: blur(26px) saturate(170%);
  backdrop-filter: blur(26px) saturate(170%);
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0 0 auto 0;
  height: 46%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.16), transparent);
  pointer-events: none;
}
.hero-top {
  display: flex;
  align-items: center;
  gap: 13px;
  position: relative;
}
.logo {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  flex: none;
  object-fit: cover;
  border: 1px solid var(--hair-2);
  box-shadow:
    0 8px 22px rgba(92, 208, 255, 0.28),
    inset 0 1px 0 rgba(255, 255, 255, 0.3);
}
.hero h1 {
  margin: 0;
  font-size: 18px;
  font-weight: 650;
  letter-spacing: 0.005em;
}
.hero .sub {
  margin: 2px 0 0;
  font-size: 12px;
  color: var(--text-2);
  letter-spacing: 0.02em;
}
.refresh {
  margin-left: auto;
  width: 40px;
  height: 40px;
  border-radius: 13px;
  border: 1px solid var(--hair-2);
  background: var(--glass-2);
  color: var(--text);
  font-size: 17px;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition:
    transform 0.25s var(--ease),
    background 0.25s ease,
    box-shadow 0.25s ease;
}
.refresh:hover {
  background: rgba(160, 184, 235, 0.16);
}
.refresh:active {
  transform: scale(0.9);
}
.refresh.spin {
  animation: spin 0.8s var(--ease) infinite;
  color: var(--accent);
  box-shadow: 0 0 18px rgba(92, 208, 255, 0.35);
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  position: relative;
}
.badge {
  font-size: 11px;
  font-weight: 650;
  letter-spacing: 0.06em;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--hair);
  background: var(--glass-2);
  color: var(--muted);
  transition: all 0.3s var(--ease);
}
.badge.paper {
  color: var(--accent);
  border-color: rgba(92, 208, 255, 0.4);
  background: rgba(92, 208, 255, 0.12);
}
.badge.blocked {
  color: var(--violet);
  border-color: rgba(182, 155, 255, 0.4);
  background: rgba(182, 155, 255, 0.12);
}
.badge.big {
  margin-left: auto;
  font-size: 12px;
  padding: 7px 16px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.16);
}
.badge.pass {
  color: var(--pass);
  border-color: rgba(67, 221, 155, 0.45);
  background: rgba(67, 221, 155, 0.14);
}
.badge.warn {
  color: var(--warn);
  border-color: rgba(251, 192, 74, 0.45);
  background: rgba(251, 192, 74, 0.14);
}
.badge.fail {
  color: var(--fail);
  border-color: rgba(255, 107, 117, 0.5);
  background: rgba(255, 107, 117, 0.16);
}
.badge.offline {
  color: var(--faint);
}
.updated {
  font-size: 11px;
  color: var(--faint);
  letter-spacing: 0.03em;
  position: relative;
}

/* BTC price — premium glass sub-panel inside the hero */
.price {
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 16px;
  border: 1px solid var(--hair);
  background: linear-gradient(150deg, rgba(92, 208, 255, 0.12), rgba(124, 140, 255, 0.05) 70%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.12);
}
.price-main {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}
.price-label {
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}
.price-value {
  font-size: 27px;
  font-weight: 750;
  letter-spacing: -0.02em;
  line-height: 1.05;
  font-variant-numeric: tabular-nums;
  background: linear-gradient(180deg, #ffffff, #cfe0fb);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.price-sub {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.price-sub .chip {
  margin: 0;
  font-size: 10.5px;
}

/* --- Cards ----------------------------------------------------------------- */
.card,
.diag {
  position: relative;
  border-radius: var(--radius);
  border: 1px solid var(--hair);
  background: linear-gradient(158deg, var(--glass-2), var(--glass) 60%);
  box-shadow:
    0 14px 38px rgba(0, 0, 0, 0.42),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
  -webkit-backdrop-filter: blur(18px) saturate(155%);
  backdrop-filter: blur(18px) saturate(155%);
}
.card {
  padding: 16px 18px;
}
/* Specular top edge */
.card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.22), transparent 38%);
  -webkit-mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}
/* Sheen sweep on reveal */
.card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(105deg, transparent 35%, rgba(255, 255, 255, 0.1) 50%, transparent 65%);
  transform: translateX(-120%);
  pointer-events: none;
}
.card.in::after {
  animation: sheen 1.1s var(--ease) 0.15s;
}

/* Scroll-reveal */
.reveal {
  opacity: 0;
  transform: translateY(16px) scale(0.99);
  transition:
    opacity 0.6s var(--ease),
    transform 0.6s var(--ease);
  will-change: opacity, transform;
}
.reveal.in {
  opacity: 1;
  transform: none;
}

.card h2 {
  margin: 0 0 12px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--faint);
  display: flex;
  align-items: center;
  gap: 9px;
}
.card h2 .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
}
.dot.pass {
  background: var(--pass);
  box-shadow: 0 0 10px var(--pass);
}
.dot.warn {
  background: var(--warn);
  box-shadow: 0 0 10px var(--warn);
}
.dot.fail {
  background: var(--fail);
  box-shadow: 0 0 10px var(--fail);
}

.rows {
  display: grid;
  gap: 1px;
}
.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  font-variant-numeric: tabular-nums;
}
.row:last-child {
  border-bottom: none;
}
.row .k {
  color: var(--text-2);
  font-size: 13px;
}
.row .v {
  font-size: 14.5px;
  font-weight: 600;
  text-align: right;
}
.v.pass,
.v.long {
  color: var(--pass);
}
.v.warn {
  color: var(--warn);
}
.v.fail,
.v.short {
  color: var(--fail);
}
.v.muted {
  color: var(--faint);
  font-weight: 500;
}
.v.no_trade {
  color: var(--muted);
}

/* Hero metric */
.metric {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 10px;
}
.metric .big {
  font-size: 32px;
  font-weight: 750;
  letter-spacing: -0.025em;
  background: linear-gradient(180deg, #ffffff, #c9d6ef);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.metric .tag {
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.04em;
}
.empty {
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.5;
  padding: 8px 0 2px;
}
.empty.center {
  text-align: center;
  padding: 16px 0;
}
.empty .ic {
  display: block;
  font-size: 20px;
  opacity: 0.6;
  margin-bottom: 6px;
}

/* Position block */
.pos-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.pos-side {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid var(--hair);
}
.pos-side.long {
  color: var(--pass);
  border-color: rgba(67, 221, 155, 0.4);
  background: rgba(67, 221, 155, 0.12);
}
.pos-side.short {
  color: var(--fail);
  border-color: rgba(255, 107, 117, 0.4);
  background: rgba(255, 107, 117, 0.12);
}
.pos-sym {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-2);
}

/* Safety card */
.safety {
  border-color: rgba(67, 221, 155, 0.24);
  background: linear-gradient(158deg, rgba(67, 221, 155, 0.1), var(--glass) 62%);
}
.safety .check {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  font-size: 13.5px;
  color: var(--text);
}
.safety .check::before {
  content: '✓';
  color: var(--pass);
  font-weight: 800;
  font-size: 13px;
}

/* Diagnostics accordion */
details.diag {
  overflow: hidden;
}
details.diag > summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 18px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-2);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
details.diag > summary::-webkit-details-marker {
  display: none;
}
details.diag > summary::after {
  content: '⌄';
  font-size: 17px;
  color: var(--muted);
  transition: transform 0.3s var(--ease);
}
details.diag[open] > summary::after {
  transform: rotate(180deg);
}
.diag-body {
  padding: 2px 18px 18px;
  display: grid;
  gap: 16px;
}
.diag-group .t {
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--faint);
  margin-bottom: 8px;
}
.chip {
  display: inline-block;
  font-size: 11px;
  padding: 5px 10px;
  margin: 0 6px 6px 0;
  border-radius: 9px;
  background: var(--glass-2);
  border: 1px solid var(--hair);
  color: var(--text-2);
  font-variant-numeric: tabular-nums;
}
.note {
  font-size: 12.5px;
  color: var(--text-2);
  line-height: 1.55;
  padding: 7px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.note:last-child {
  border-bottom: none;
}

/* Banners */
.banner-msg {
  border-radius: 16px;
  padding: 13px 15px;
  font-size: 13px;
  border: 1px solid var(--hair);
  background: var(--glass-2);
  color: var(--text-2);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}
.banner-msg.warn {
  border-color: rgba(251, 192, 74, 0.38);
  color: var(--warn);
  background: rgba(251, 192, 74, 0.09);
}

/* Safety failure overlay */
.alarm {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: none;
  place-items: center;
  text-align: center;
  padding: 32px;
  background: radial-gradient(circle at 50% 32%, rgba(255, 107, 117, 0.28), rgba(5, 8, 15, 0.97));
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.alarm.show {
  display: grid;
  animation: fade 0.3s ease;
}
.alarm h2 {
  font-size: 22px;
  color: var(--fail);
  letter-spacing: 0.02em;
}
.alarm p {
  color: var(--text);
  max-width: 320px;
  line-height: 1.55;
}

.foot {
  text-align: center;
  color: var(--faint);
  font-size: 11px;
  letter-spacing: 0.02em;
  padding: 8px 0 2px;
}

/* Skeleton */
.sk {
  display: inline-block;
  height: 13px;
  border-radius: 7px;
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.05),
    rgba(255, 255, 255, 0.16),
    rgba(255, 255, 255, 0.05)
  );
  background-size: 200% 100%;
  animation: shimmer 1.4s ease-in-out infinite;
}
.sk.w1 {
  width: 92px;
}
.sk.w2 {
  width: 56px;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}
@keyframes shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}
@keyframes sheen {
  to {
    transform: translateX(120%);
  }
}
@keyframes fade {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@media (min-width: 620px) {
  .app {
    max-width: 600px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }
}