/* SATashkent Analytics — Apple-style restraint, SATashkent palette.
   Colours are taken from satashkent.uz: crimson, deep wine, cream, gold. */

:root {
  --crimson: #8b1a2e;
  --crimson-glow: #c4243f;
  --wine-top: #3d0510;
  --wine-deep: #1a0208;
  --gold: #c9a84c;
  --gold-light: #f0d080;

  --bg: #f5f0e8;           /* cream */
  --surface: #ffffff;
  --surface-2: #faf7f2;    /* inputs, tracks */
  --ink: #0d0d0d;
  --ink-2: #5a5450;
  --ink-3: #8a837d;
  --hairline: rgba(13, 13, 13, 0.08);
  --nav-bg: rgba(245, 240, 232, 0.78);
  --accent: var(--crimson);
  --accent-ink: #ffffff;
  --good: #1f7a4d;
  --good-bg: rgba(31, 122, 77, 0.10);
  --bad: #b3261e;
  --bad-bg: rgba(179, 38, 30, 0.09);
  --warn: #9a6a00;
  --shadow: 0 1px 2px rgba(13, 13, 13, 0.04), 0 8px 28px rgba(13, 13, 13, 0.06);

  --display: "Playfair Display", "Iowan Old Style", Georgia, serif;
  --sans: "DM Sans", -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", system-ui, sans-serif;
  --radius: 22px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d0d0d;
    --surface: #161414;
    --surface-2: #1f1b1b;
    --ink: #f5f0e8;
    --ink-2: #b9b0a8;
    --ink-3: #847b74;
    --hairline: rgba(245, 240, 232, 0.10);
    --nav-bg: rgba(13, 13, 13, 0.72);
    --accent: var(--crimson-glow);
    --good: #5fd39a;
    --good-bg: rgba(95, 211, 154, 0.12);
    --bad: #ff7b72;
    --bad-bg: rgba(255, 123, 114, 0.12);
    --warn: var(--gold-light);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 10px 32px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 17px/1.47 var(--sans); letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
}
button, input, select { font: inherit; color: inherit; letter-spacing: inherit; }

/* ---------- navigation: frosted, quiet ---------- */
.nav {
  position: sticky; top: 0; z-index: 10;
  background: var(--nav-bg);
  -webkit-backdrop-filter: saturate(180%) blur(20px); backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--hairline);
}
.nav-inner { max-width: 1200px; margin: 0 auto; padding: 0 22px; height: 52px;
  display: flex; align-items: center; gap: 28px; }
.brand { font-weight: 700; font-size: 17px; letter-spacing: -0.02em; white-space: nowrap; }
.brand-mark { color: var(--accent); }
.brand-sub { font-weight: 400; color: var(--ink-3); margin-left: 4px; }
.tabs { display: flex; gap: 2px; overflow-x: auto; scrollbar-width: none; }
.tabs::-webkit-scrollbar { display: none; }
.tabs button { background: none; border: 0; padding: 6px 12px; border-radius: 980px; cursor: pointer;
  font-size: 14px; color: var(--ink-2); white-space: nowrap; transition: color .2s, background .2s; }
.tabs button:hover { color: var(--ink); }
.tabs button.on { color: var(--ink); background: var(--hairline); font-weight: 600; }
.who { margin-left: auto; display: flex; gap: 14px; align-items: center; font-size: 13px; color: var(--ink-3); white-space: nowrap; }
@media (max-width: 760px) {
  .nav-inner { height: auto; flex-wrap: wrap; gap: 6px 14px; padding: 10px 16px; }
  .who { margin-left: auto; }
  .tabs { order: 3; width: 100%; }
}

/* ---------- layout & type ---------- */
main { max-width: 1200px; margin: 0 auto; padding: 0 22px 96px; }
@media (max-width: 560px) { main { padding: 0 16px 72px; } }

.view { animation: rise .45s cubic-bezier(.2, .7, .2, 1); }
@keyframes rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .view { animation: none; } }

.page-head { padding: 64px 0 32px; max-width: 760px; }
.page-head.split { max-width: none; display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; flex-wrap: wrap; }
.display { font-family: var(--display); font-weight: 700; font-size: clamp(38px, 6vw, 64px);
  line-height: 1.04; letter-spacing: -0.025em; margin: 0; }
.display.light { color: #fff; }
.lede { font-size: clamp(18px, 2.2vw, 21px); color: var(--ink-2); margin: 14px 0 0; line-height: 1.38; }
.eyebrow { text-transform: uppercase; letter-spacing: 0.14em; font-size: 12px; font-weight: 600;
  color: var(--accent); margin: 0 0 10px; }
.eyebrow.gold { color: var(--gold-light); }
.hint { color: var(--ink-3); font-size: 14px; margin: 8px 0 16px; line-height: 1.45; }

/* ---------- surfaces ---------- */
.card { background: var(--surface); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow); min-width: 0; }
@media (max-width: 560px) { .card { padding: 20px; border-radius: 18px; } }
.grid { display: grid; grid-template-columns: minmax(0, 440px) minmax(0, 1fr); gap: 22px; align-items: start; }
@media (max-width: 900px) { .grid { grid-template-columns: 1fr; } }

/* hero band: deep wine, gold numbers */
.hero-band {
  margin: 32px 0 22px; padding: 56px 48px; border-radius: 28px; color: #fff;
  background:
    radial-gradient(1200px 400px at 85% -10%, rgba(196, 36, 63, 0.35), transparent 60%),
    linear-gradient(160deg, var(--wine-top), var(--wine-deep));
  box-shadow: 0 20px 60px rgba(61, 5, 16, 0.25);
}
@media (max-width: 560px) { .hero-band { padding: 36px 22px; border-radius: 22px; } }
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 28px; margin-top: 40px; }
.tile { border-top: 1px solid rgba(240, 208, 128, 0.28); padding-top: 18px; }
.tile .big { font-family: var(--display); font-size: clamp(40px, 5vw, 56px); font-weight: 700;
  letter-spacing: -0.02em; line-height: 1; color: var(--gold-light); }
.tile .small { margin-top: 8px; font-size: 15px; color: rgba(255, 255, 255, 0.72); }

/* ---------- forms ---------- */
label { display: grid; gap: 6px; margin: 14px 0; font-size: 13px; font-weight: 500; color: var(--ink-2); }
input, select {
  width: 100%; min-width: 0; padding: 12px 14px; font-size: 16px; color: var(--ink);
  background: var(--surface-2); border: 1px solid transparent; border-radius: 12px; outline: none;
  transition: border-color .2s, box-shadow .2s, background .2s;
}
input:focus, select:focus { border-color: var(--accent); background: var(--surface);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 18%, transparent); }
input::placeholder { color: var(--ink-3); }
fieldset { border: 0; border-top: 1px solid var(--hairline); padding: 18px 0 2px; margin: 18px 0 0; }
legend { padding: 0 10px 0 0; font-weight: 600; font-size: 15px; color: var(--ink); }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 420px) { .row { grid-template-columns: 1fr; } }

.primary {
  background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 980px;
  padding: 12px 24px; font-size: 16px; font-weight: 600; cursor: pointer; margin-top: 12px;
  transition: transform .15s, box-shadow .2s, filter .2s;
}
.primary:hover { filter: brightness(1.08); box-shadow: 0 8px 24px color-mix(in srgb, var(--accent) 35%, transparent); }
.primary:active { transform: scale(0.98); }
.primary:disabled { opacity: .55; cursor: default; box-shadow: none; }
.primary.wide { width: 100%; padding: 14px 24px; }
.link { background: none; border: 0; color: var(--accent); cursor: pointer; padding: 0; font-size: inherit; }
.link.danger { color: var(--bad); }
.error { color: var(--bad); font-size: 14px; min-height: 1.2em; margin: 10px 0 0; }
.ok { color: var(--good); font-size: 14px; min-height: 1.2em; }

/* segmented control, iOS-style */
.seg { display: inline-flex; padding: 3px; gap: 2px; background: var(--hairline); border-radius: 980px; }
.seg button { background: none; border: 0; padding: 7px 16px; border-radius: 980px; cursor: pointer;
  font-size: 14px; color: var(--ink-2); transition: background .2s, color .2s, box-shadow .2s; }
.seg button.on { background: var(--surface); color: var(--ink); font-weight: 600;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12); }
.mode-seg { margin-bottom: 4px; }
.toolbar { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 6px; }

/* ---------- tables ---------- */
.table-wrap { overflow-x: auto; margin: 0 -4px; }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th { text-align: left; font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--ink-3); padding: 10px 12px; border-bottom: 1px solid var(--hairline); white-space: nowrap; }
td { padding: 14px 12px; border-bottom: 1px solid var(--hairline); vertical-align: middle; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr { transition: background .15s; }
tbody tr:hover { background: color-mix(in srgb, var(--accent) 4%, transparent); }
tr.provisional td { color: var(--ink-3); }
tr.inactive td { color: var(--ink-3); text-decoration: line-through; }
tr.unlinked td:first-child { font-weight: 600; }
#names-table select { min-width: 220px; padding: 9px 12px; }

.verdict { display: inline-block; font-size: 13px; font-weight: 600; padding: 4px 10px; border-radius: 980px;
  color: var(--ink-2); background: var(--hairline); white-space: nowrap; }
.verdict.good { color: var(--good); background: var(--good-bg); }
.verdict.bad { color: var(--bad); background: var(--bad-bg); }
.badge { display: inline-block; margin-left: 8px; padding: 2px 8px; border-radius: 980px; font-size: 11px;
  font-weight: 600; color: var(--ink-3); background: var(--hairline); vertical-align: middle; }
.badge.warn { color: var(--warn); background: color-mix(in srgb, var(--gold) 18%, transparent); }

/* ---------- calculator result ---------- */
.result .verdict-line { font-family: var(--display); font-size: clamp(24px, 3vw, 30px); font-weight: 700;
  line-height: 1.18; letter-spacing: -0.015em; margin: 0 0 10px; }
.result .timeline { color: var(--ink-2); margin: 0 0 20px; }
.result.unreliable { box-shadow: var(--shadow), inset 0 0 0 1.5px color-mix(in srgb, var(--gold) 60%, transparent); }
.warnings { margin: 18px 0 0; padding: 14px 18px 14px 34px; border-radius: 14px; font-size: 14px; color: var(--warn);
  background: color-mix(in srgb, var(--gold) 12%, transparent); }
.warnings:empty { display: none; }
.bar { display: inline-block; width: 96px; height: 6px; background: var(--hairline); border-radius: 980px;
  vertical-align: middle; overflow: hidden; }
.bar .fill { display: block; height: 100%; border-radius: 980px;
  background: linear-gradient(90deg, var(--crimson), var(--crimson-glow)); }
.bar-label { margin-left: 10px; font-variant-numeric: tabular-nums; font-weight: 600; }
td, .tile .big { font-variant-numeric: tabular-nums; }

/* ---------- "How was this calculated?" ---------- */
.explain { margin-top: 22px; border-top: 1px solid var(--hairline); padding-top: 14px; font-size: 14px; }
.explain > summary { cursor: pointer; list-style: none; color: var(--accent); font-weight: 600; font-size: 14px;
  display: inline-flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.explain > summary::-webkit-details-marker { display: none; }
.explain > summary::before { content: "ⓘ"; font-weight: 400; }
.hint-inline { color: var(--ink-3); font-weight: 400; font-size: 13px; }
.explain-body, .explain .steps { margin-top: 14px; padding: 18px 20px; border-radius: 16px; background: var(--surface-2);
  color: var(--ink-2); line-height: 1.5; }
.explain-body p { margin: 0 0 10px; }
.explain-body .steps { margin: 0; padding: 0; background: none; }
.steps { list-style: none; counter-reset: none; }
.steps li { padding: 0 0 14px; }
.steps li + li { border-top: 1px solid var(--hairline); padding-top: 14px; }
.steps li:last-child { padding-bottom: 0; }
.step-title { margin: 0 0 4px; font-weight: 600; color: var(--ink); }
.step-detail { margin: 0; }
.step-math, .mono { font-family: ui-monospace, "SF Mono", "DM Mono", Menlo, Consolas, monospace; font-size: 13px; }
.step-math { margin: 10px 0 0; padding: 12px 14px; border-radius: 10px; background: var(--surface);
  color: var(--ink); white-space: pre; overflow-x: auto; line-height: 1.55; }
table.clickable tbody tr { cursor: pointer; }
tr.selected td { background: color-mix(in srgb, var(--accent) 8%, transparent); }

/* ---------- sign in ---------- */
.login { display: grid; grid-template-columns: 1.2fr 1fr; gap: 56px; align-items: center; min-height: calc(100vh - 52px); padding: 48px 0; }
.login-card { max-width: 420px; width: 100%; justify-self: end; }
@media (max-width: 860px) {
  .login { grid-template-columns: 1fr; gap: 28px; min-height: 0; padding-top: 56px; }
  .login-card { justify-self: stretch; max-width: none; }
}