/* ==========================================================================
   Signal Forensics — Steep style reference
   Serif analytics on warm paper. Light only, 97% achromatic, peach once.
   ========================================================================== */

:root {
  --ink:        #17191c;
  --paper:      #ffffff;
  --mist:       #f2f2f3;
  --fog:        #fafafb;
  --slate:      #777b86;
  --ash:        #979799;
  --smoke:      #a3a6af;
  --peach:      #fbe1d1;
  --sienna:     #5d2a1a;
  --hairline:   #ececec;

  --serif: 'Signifier', ui-serif, Georgia, 'Source Serif 4', 'Times New Roman', serif;
  --sans:  'Sohne', Inter, ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;

  --w-400: 400; --w-430: 430; --w-450: 450; --w-480: 480; --w-500: 500;

  --page: 1200px;
  --gap-section: 80px;

  --r-card: 24px; --r-input: 16px; --r-pill: 9999px; --r-elev: 20px; --r-small: 16px;

  --shadow-artifact:
    rgba(4, 23, 43, .05) 0 0 0 1px,
    rgba(0, 0, 0, .10) 0 20px 25px -5px,
    rgba(0, 0, 0, .10) 0 8px 10px -6px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: var(--w-400) 17px/1.35 var(--sans);
  font-variant-numeric: tabular-nums;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { font-family: var(--serif); font-weight: var(--w-400); margin: 0; }
p { margin: 0 0 1em; }
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
em { font-style: italic; }

.shell { max-width: var(--page); margin-inline: auto; padding-inline: 40px; }
.band-fog { background: var(--fog); }

/* display scale ---------------------------------------------------------- */
.t-display {
  font-family: var(--serif); font-weight: var(--w-400);
  font-size: clamp(42px, 6.4vw, 90px); line-height: 1.3; letter-spacing: -0.025em;
}
.t-h-lg {
  font-family: var(--serif); font-weight: var(--w-400);
  font-size: clamp(34px, 4.4vw, 64px); line-height: 1.3; letter-spacing: -0.015em;
}
.t-h {
  font-family: var(--serif); font-weight: var(--w-400);
  font-size: clamp(28px, 3.2vw, 44px); line-height: 1.3; letter-spacing: -0.015em;
}
.t-h-sm { font-size: 26px; line-height: 1.18; letter-spacing: -0.009em; font-weight: var(--w-450); }
.t-sub  { font-size: 22px; line-height: 1.5; }
.t-lg   { font-size: 20px; line-height: 1.35; }
.t-cap  { font-size: 15px; line-height: 1.5; color: var(--slate); }
.tag    { font-size: 14px; font-weight: var(--w-400); color: var(--ash); letter-spacing: 0; }
.muted  { color: var(--slate); }

/* nav -------------------------------------------------------------------- */
.nav { background: none; border: 0; box-shadow: none; }
.nav__in { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding-block: 28px; }
.logo { display: flex; align-items: center; gap: 10px; font-family: var(--serif); font-size: 22px; letter-spacing: -0.01em; }
.logo__mark {
  width: 28px; height: 28px; border-radius: var(--r-pill);
  background: var(--ink); color: var(--paper);
  display: grid; place-items: center; font: var(--w-450) 12px/1 var(--sans); letter-spacing: 0;
}
.nav__links { display: flex; gap: 28px; font-size: 16px; color: var(--ink); }
.nav__links a { padding-block: 2px; }

/* pills ------------------------------------------------------------------ */
.pill {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border-radius: var(--r-pill); padding: 12px 20px;
  font: var(--w-430) 16px/1 var(--sans); cursor: pointer; border: 1px solid transparent;
}
.pill--fill { background: var(--ink); color: var(--paper); border-color: var(--paper); }
.pill--fill:hover { opacity: .88; }
.pill--ghost { background: transparent; color: var(--ink); border-color: var(--ink); }
.pill--ghost:hover { background: var(--ink); color: var(--paper); }
.pill:disabled { opacity: .4; cursor: default; }

.arrowlink { font-size: 16px; padding-block: 20px; display: inline-block; }
.arrowlink:hover { text-decoration: underline; text-underline-offset: 3px; }

/* hero ------------------------------------------------------------------- */
.hero { padding-block: 40px var(--gap-section); position: relative; }
.hero__grid { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr); gap: 64px; align-items: center; }
.hero h1 { max-width: 15ch; }
.hero__sub { font-size: 17px; color: var(--slate); max-width: 46ch; margin-top: 24px; line-height: 1.5; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-top: 32px; }

/* composer --------------------------------------------------------------- */
.composer { margin-top: 32px; }
.composer__label { font-size: 14px; color: var(--ash); margin-bottom: 12px; }
.composer__box {
  background: var(--paper); border: 1px solid var(--hairline); border-radius: var(--r-input);
  padding: 16px; display: flex; align-items: center; gap: 12px;
}
.composer__box:focus-within { border-color: var(--smoke); }
#url {
  flex: 1; min-width: 0; border: 0; outline: none; background: none; color: var(--ink);
  font: var(--w-400) 16px/1.4 var(--sans);
}
#url::placeholder { color: var(--smoke); }
.send {
  flex: none; width: 40px; height: 40px; border-radius: var(--r-pill); border: 0;
  background: var(--ink); color: var(--paper); cursor: pointer;
  display: grid; place-items: center; font-size: 17px; line-height: 1;
}
.send:hover { opacity: .88; }
.send:disabled { opacity: .35; cursor: default; }
.composer__hint { font-size: 15px; color: var(--slate); margin: 12px 0 0; }
.linkish { background: none; border: 0; padding: 0; font: inherit; color: var(--ink); cursor: pointer; }
.linkish:hover { text-decoration: underline; text-underline-offset: 3px; }
.status { margin-top: 16px; font-size: 15px; color: var(--slate); }
.status[data-tone="bad"] { color: var(--ink); }

/* floating artifacts ----------------------------------------------------- */
.artifacts { position: relative; min-height: 300px; }
.artifact {
  background: var(--paper); border-radius: var(--r-elev); box-shadow: var(--shadow-artifact);
  padding: 16px 20px 12px 12px; position: absolute;
}
.artifact__pad { padding: 4px 8px 8px; }
.artifact .k { font-size: 14px; color: var(--slate); }
.artifact .v { font: var(--w-500) 20px/1.2 var(--sans); margin-top: 6px; }
.art-1 { top: 0; right: 24px; width: 250px; }
.art-2 { top: 132px; left: 0; width: 268px; }
.art-3 { top: 236px; right: 64px; width: 208px; }

/* generic cards ---------------------------------------------------------- */
.card { background: var(--mist); border-radius: var(--r-card); padding: 32px; }
.card--flat { background: var(--paper); border: 1px solid var(--hairline); }
.card--elev { background: var(--paper); border-radius: var(--r-elev); box-shadow: var(--shadow-artifact); padding: 24px; }

/* report ----------------------------------------------------------------- */
.report { padding-bottom: var(--gap-section); }
.sec { padding-top: var(--gap-section); }
.sec__head { margin-bottom: 32px; }
.sec__head .tag { display: block; margin-bottom: 12px; }

.ident { padding-top: var(--gap-section); }
.ident__by { font-size: 17px; color: var(--slate); margin-top: 16px; }
.ident__meta {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 24px;
  margin-top: 40px; padding-top: 28px; border-top: 1px solid var(--hairline);
}
.ident__meta dt { font-size: 14px; color: var(--ash); margin-bottom: 8px; }
.ident__meta dd { margin: 0; font-size: 17px; }

/* verdict — the single peach card ---------------------------------------- */
.verdict {
  background: var(--peach); color: var(--sienna); border-radius: var(--r-card);
  padding: 40px; margin-top: 40px;
  display: grid; grid-template-columns: minmax(0, 300px) minmax(0, 1fr); gap: 48px; align-items: center;
}
.verdict__score { font-family: var(--serif); font-weight: var(--w-400); font-size: 90px; line-height: 1.3; letter-spacing: -0.025em; }
.verdict__score span { font: var(--w-400) 20px/1 var(--sans); letter-spacing: 0; }
.verdict__label { font-size: 15px; margin-top: 4px; }
.verdict h2 { font-size: 26px; line-height: 1.18; letter-spacing: -0.009em; font-family: var(--sans); font-weight: var(--w-450); }
.verdict p { font-size: 18px; font-weight: var(--w-430); line-height: 1.5; margin: 16px 0 0; }
.verdict__caps { margin: 20px 0 0; padding: 0; list-style: none; font-size: 15px; }
.verdict__caps li { padding-block: 3px; }
.meter { margin-top: 20px; height: 4px; border-radius: var(--r-pill); background: rgba(93, 42, 26, .18); position: relative; }
.meter i { position: absolute; inset: 0 auto 0 0; border-radius: var(--r-pill); background: var(--sienna); }
.meter__scale { display: flex; justify-content: space-between; font-size: 14px; margin-top: 10px; opacity: .75; }

/* scorecard -------------------------------------------------------------- */
.cats { display: grid; gap: 12px; }
.cat { background: var(--mist); border-radius: var(--r-card); padding: 24px 28px;
       display: grid; grid-template-columns: minmax(0, 260px) minmax(0, 1fr) 96px; gap: 28px; align-items: center; }
.cat__name { font: var(--w-450) 20px/1.35 var(--sans); }
.cat__w { font-size: 14px; color: var(--ash); margin-top: 4px; }
.cat__notes { margin: 0; padding: 0; list-style: none; }
.cat__notes li { font-size: 15px; color: var(--slate); line-height: 1.5; }
.cat__pts { text-align: right; font: var(--w-500) 20px/1.2 var(--sans); }
.cat__pts span { color: var(--ash); font-weight: var(--w-400); font-size: 15px; }
.cat__bar { grid-column: 1 / -1; height: 3px; border-radius: var(--r-pill); background: rgba(23, 25, 28, .10); position: relative; }
.cat__bar i { position: absolute; inset: 0 auto 0 0; border-radius: var(--r-pill); background: var(--ink); }
.cat--low .cat__bar i { background: var(--smoke); }

/* findings — severity by ink weight, not hue ------------------------------ */
.finding { display: grid; grid-template-columns: 132px minmax(0, 1fr); gap: 28px;
           padding-block: 28px; border-bottom: 1px solid var(--hairline); }
.finding:last-child { border-bottom: 0; }
.finding h3 { font: var(--w-450) 20px/1.35 var(--sans); }
.finding p { font-size: 17px; line-height: 1.5; margin: 8px 0 0; color: var(--slate); }
.finding--critical h3 { font-weight: var(--w-500); }
.finding--critical p { color: var(--ink); }
.finding--warn p { color: var(--slate); }
.finding--ok h3 { color: var(--slate); font-weight: var(--w-430); }
.finding--ok p { color: var(--ash); }

/* arithmetic ------------------------------------------------------------- */
.arith { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 380px); gap: 32px; align-items: start; }
.chart h3 { font: var(--w-450) 20px/1.2 var(--sans); }
.chart .t-cap { margin: 8px 0 20px; }
.chart svg { display: block; width: 100%; height: auto; }
.chart__legend { display: flex; flex-wrap: wrap; gap: 20px; margin-top: 16px; font-size: 14px; color: var(--slate); }
.chart__legend i { display: inline-block; width: 18px; height: 2px; vertical-align: middle; margin-right: 8px; }

.kpis { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.kpi { background: var(--mist); border-radius: var(--r-small); padding: 20px; }
.kpi dt { font-size: 14px; color: var(--ash); }
.kpi dd { margin: 10px 0 0; font-family: var(--serif); font-size: 32px; line-height: 1.15; letter-spacing: -0.015em; }
.kpi small { display: block; font-family: var(--sans); font-size: 14px; color: var(--slate); margin-top: 8px; line-height: 1.45; }

/* prose + tables --------------------------------------------------------- */
.prose { max-width: 68ch; }
.prose p { font-size: 17px; line-height: 1.5; }
.note { font-size: 15px; line-height: 1.5; color: var(--slate); max-width: 68ch; overflow-wrap: anywhere; }

.tbl-wrap { overflow-x: auto; }
table.data { width: 100%; border-collapse: collapse; font-size: 16px; }
table.data th, table.data td { text-align: left; padding: 14px 16px 14px 0; border-bottom: 1px solid var(--hairline); }
table.data th { font: var(--w-400) 14px/1 var(--sans); color: var(--ash); }
table.data td.n, table.data th.n { text-align: right; padding-right: 0; }
table.data tr:last-child td { border-bottom: 0; }
/* Two independent tables rather than CSS multi-column: a table inside a
   column box overflows unpredictably once a value gets long. */
.cols2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 64px; }

/* method / foot ---------------------------------------------------------- */
.method { padding-block: var(--gap-section); }
.method__grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; margin-top: 40px; }
.method .card h3 { font: var(--w-500) 20px/1.35 var(--sans); margin-bottom: 12px; }
.method .card p { font-size: 16px; line-height: 1.5; color: var(--ink); margin: 0; }
.foot { padding-block: 40px; border-top: 1px solid var(--hairline); }
.foot__in { display: flex; flex-wrap: wrap; gap: 8px 20px; font-size: 15px; color: var(--slate); }

/* responsive ------------------------------------------------------------- */
@media (max-width: 1080px) {
  .hero__grid { grid-template-columns: 1fr; gap: 48px; }
  .artifacts { display: none; }
  .arith { grid-template-columns: 1fr; }
  .cat { grid-template-columns: minmax(0, 1fr) 96px; }
  .cat__notes { grid-column: 1 / -1; }
}
@media (max-width: 860px) {
  :root { --gap-section: 56px; }
  .shell { padding-inline: 24px; }
  .verdict { grid-template-columns: 1fr; gap: 28px; padding: 32px; }
  .method__grid { grid-template-columns: 1fr; }
  .cols2 { columns: 1; }
  .nav__links { display: none; }
  .finding { grid-template-columns: 1fr; gap: 8px; }
  .kpis { grid-template-columns: 1fr; }
  .card { padding: 24px; }
}
@media print {
  .nav, .composer, .method, .foot, .artifacts { display: none; }
  .verdict { box-shadow: none; }
}