/* style.css: the operator control plane's one stylesheet, the house Signal
   Amber system shared with the client portal (DESIGN.md). Warm instrument
   panel: stone neutrals, one amber accent, IBM Plex. Served from the binary
   via go:embed at /cp/skin/. */

/* --- tokens (DESIGN.md §2) ------------------------------------------- */
:root {
  --bg: #FAFAF9;
  --surface: #FFFFFF;
  --panel: #F5F5F4;
  --ink: #1C1917;
  --secondary: #57534E;
  --border: #E7E5E4;
  --border-strong: #78716C;

  --accent: #B45309;
  --accent-fill: #D97706;
  --accent-tint: #FEF3C7;
  --accent-ink: #92400E;

  --danger: #B91C1C;
  --danger-tint: #FEE2E2;
  --danger-ink: #7F1D1D;
  --ok: #15803D;
  --ok-tint: #DCFCE7;
  --ok-ink: #14532D;

  --font-sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Consolas, monospace;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;
  --space-16: 64px;

  --radius: 8px;
  --radius-small: 4px;
  --speed-hover: 120ms;
  --speed-active: 80ms;
}

/* --- fonts (self-hosted latin woff2, binary-embedded; DESIGN.md §3) --- */
@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url("../fonts/ibmplexsans-var.woff2") format("woff2");
}
@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/ibmplexmono-400.woff2") format("woff2");
}
@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("../fonts/ibmplexmono-500.woff2") format("woff2");
}

/* --- base ------------------------------------------------------------ */
* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
}

h1, h2, h3 {
  line-height: 1.3;
  margin: 0 0 var(--space-3);
  text-wrap: balance;
}

h1 { font-size: 28px; font-weight: 600; }
h2 { font-size: 22px; font-weight: 600; }
h3 { font-size: 16px; font-weight: 600; }

p { margin: 0 0 var(--space-3); max-width: 60ch; }
p:last-child { margin-bottom: 0; }

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--ink); }

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-small);
  padding: 1px var(--space-2);
  word-break: break-word;
}

.mono { font-family: var(--font-mono); }
.num { font-variant-numeric: tabular-nums; }

.lede { color: var(--secondary); font-size: 16px; max-width: 60ch; }
.fineprint { color: var(--secondary); font-size: 13px; max-width: 60ch; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* --- focus (DESIGN.md §5: never removed, never animated) ------------- */
:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -48px;
  z-index: 10;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: var(--space-2) var(--space-4);
  transition: top var(--speed-hover);
}
.skip-link:focus { top: var(--space-2); }

/* --- layout ---------------------------------------------------------- */
.page {
  max-width: 72ch;
  margin: 0 auto;
  padding: var(--space-6) var(--space-4) var(--space-16);
}
.page.wide { max-width: 1200px; }

.section { margin: var(--space-8) 0; }
.section > h2 { border-top: 1px solid var(--border); padding-top: var(--space-6); }

.page-head { margin-bottom: var(--space-4); }
/* parent link above the title: the one-hop exit a drilled-in screen
   needs (44px tap on a 13px label; negative margins keep the rhythm). */
.crumb { margin: calc(var(--space-2) * -1) 0 var(--space-2); }
.crumb a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 13px;
  font-weight: 500;
}
.after-form { margin-top: var(--space-3); }

body.centered {
  display: grid;
  min-height: 100dvh;
  place-items: center;
  padding: var(--space-4);
}
body.centered .login-panel,
body.centered .home {
  width: 100%;
  max-width: 480px;
}
body.centered .home { max-width: 640px; }

/* --- header and nav --------------------------------------------------- */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.site-header-row {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-2) var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.brand {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-2);
  color: var(--ink);
  text-decoration: none;
  min-height: 44px;
  align-items: center;
}
.brand-mark { font-size: 22px; font-weight: 600; letter-spacing: -0.01em; }
.brand-sub { color: var(--secondary); font-size: 13px; font-weight: 500; }

.account {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.account-email {
  font-size: 14px;
  color: var(--secondary);
  text-decoration: none;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.account-email:hover { color: var(--ink); text-decoration: underline; }

.site-nav,
.subnav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}
.site-nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}
.site-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 var(--space-3);
  color: var(--secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  border-bottom: 3px solid transparent;
}
.site-nav a:hover { color: var(--ink); }
.site-nav a[aria-current="page"] {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

.subnav {
  margin: 0 0 var(--space-6);
  border-block: 1px solid var(--border);
  padding: var(--space-1) 0;
}
.subnav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 var(--space-3);
  font-size: 14px;
  font-weight: 500;
  color: var(--secondary);
  text-decoration: none;
}
.subnav a:hover { color: var(--ink); text-decoration: underline; }
.subnav a[aria-current="page"] {
  color: var(--ink);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 3px;
  text-underline-offset: 6px;
}

/* --- buttons ---------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: var(--space-2) var(--space-6);
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--speed-hover), border-color var(--speed-hover),
    color var(--speed-hover);
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--accent-fill);
  color: var(--ink);
  font-weight: 600;
}
.btn-primary:hover { background: var(--accent); color: #FFFFFF; }

.btn-secondary {
  background: var(--surface);
  border-color: var(--border-strong);
  color: var(--ink);
}
.btn-secondary:hover { background: var(--panel); }

.btn-danger {
  background: var(--danger);
  color: #FFFFFF;
  font-weight: 600;
}
.btn-danger:hover { background: #991B1B; }

.btn-small {
  min-height: 44px;
  padding: var(--space-2) var(--space-3);
  font-size: 13px;
}
.btn-block { width: 100%; }

.btn[disabled] {
  background: var(--panel);
  border-color: var(--border);
  color: var(--secondary);
  cursor: not-allowed;
  transform: none;
}
.btn-primary[disabled] { background: var(--panel); color: var(--secondary); }
.btn-danger[disabled] { background: var(--panel); color: var(--secondary); }

/* --- forms ------------------------------------------------------------ */
.form { max-width: 72ch; }

.field { margin-bottom: var(--space-4); }
.field-label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: var(--space-2);
}
.field-help {
  color: var(--secondary);
  font-size: 13px;
  margin: var(--space-2) 0 0;
}
.field-error {
  color: var(--danger);
  font-size: 13px;
  font-weight: 500;
  margin: var(--space-2) 0 0;
}

.input,
textarea,
select {
  display: block;
  width: 100%;
  min-height: 44px;
  padding: var(--space-2) var(--space-3);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  color: var(--ink);
  font-family: inherit;
  font-size: 14px;
}
textarea { line-height: 1.6; resize: vertical; }
.input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}
.field.is-invalid .input,
.field.is-invalid textarea {
  border-color: var(--danger);
}

.joined { display: flex; gap: var(--space-2); align-items: center; }
.joined .input {
  flex: 1 1 auto;
}
.joined-suffix {
  display: inline-flex;
  align-items: center;
  padding: 0 var(--space-3);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--secondary);
  font-family: var(--font-mono);
  font-size: 14px;
}

.check {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 44px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
}
.check input { width: 20px; height: 20px; accent-color: var(--accent-fill); }

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-4);
}

/* login: the password field folds away when the link mode is checked;
   without :has support the field simply stays visible and harmless */
.login-form:has(#forgotToggle:checked) .login-passfield { display: none; }

/* --- alerts ----------------------------------------------------------- */
.alert {
  border-radius: var(--radius);
  border: 1px solid var(--border-strong);
  padding: var(--space-3) var(--space-4);
  margin: 0 0 var(--space-4);
  font-size: 14px;
}
.alert p { margin: 0; max-width: none; }
.alert p + p { margin-top: var(--space-2); }

.alert-error {
  background: var(--danger-tint);
  color: var(--danger-ink);
  border-color: var(--danger);
}
.alert-ok {
  background: var(--ok-tint);
  color: var(--ok-ink);
  border-color: var(--ok);
}
.alert-waiting {
  background: var(--accent-tint);
  color: var(--accent-ink);
  border-color: var(--accent);
}
.alert-info {
  background: var(--panel);
  color: var(--ink);
}

/* --- badges (DESIGN.md §5: tint + dark ink, text only, no dots) ------ */
.badge {
  display: inline-block;
  border-radius: var(--radius-small);
  padding: 2px var(--space-2);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.5;
  white-space: nowrap;
}
.badge-waiting { background: var(--accent-tint); color: var(--accent-ink); }
.badge-flowing { background: var(--ok-tint); color: var(--ok-ink); }
.badge-error { background: var(--danger-tint); color: var(--danger-ink); }
.badge-neutral { background: var(--panel); color: var(--secondary); }

/* --- empty state ------------------------------------------------------ */
.empty {
  border-top: 1px solid var(--border);
  padding: var(--space-6) 0;
  color: var(--secondary);
}

/* --- tables ----------------------------------------------------------- */
.table-wrap { width: 100%; }
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.table th,
.table td {
  border-bottom: 1px solid var(--border);
  padding: var(--space-3) var(--space-3);
  text-align: left;
  vertical-align: middle;
}
.table thead th {
  background: var(--panel);
  border-bottom: 1px solid var(--border-strong);
  color: var(--secondary);
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
}
.table td.num,
.table th.num { text-align: right; font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.table .mono { white-space: nowrap; }

.table-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: flex-end;
  align-items: center;
}
.table-actions.actions-start { justify-content: flex-start; }

/* under 768px rows degrade to stacked label/value blocks, never a
   horizontal scroll (DESIGN.md §5) */
@media (max-width: 767px) {
  .table thead { display: none; }
  .table tr { display: block; border-bottom: 1px solid var(--border-strong); padding: var(--space-2) 0; }
  .table td {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-4);
    border-bottom: 0;
    padding: var(--space-1) 0;
    text-align: right;
  }
  .table td::before {
    content: attr(data-label);
    color: var(--secondary);
    font-size: 13px;
    font-weight: 500;
    text-align: left;
    margin-right: auto;
  }
  .table td.num { text-align: right; }
  .table-actions { justify-content: flex-start; }
}

/* --- stat strip (one instrument row, internal hairlines only) -------- */
.stat-strip {
  display: grid;
  grid-template-columns: 1fr;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  margin: var(--space-4) 0 var(--space-8);
}
.stat {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border);
  display: grid;
  gap: var(--space-1);
}
.stat:last-child { border-bottom: 0; }
@media (min-width: 768px) {
  .stat-strip { grid-template-columns: repeat(4, 1fr); }
  .stat { border-bottom: 0; border-right: 1px solid var(--border); }
  .stat:last-child { border-right: 0; }
}
.stat-label { font-size: 13px; font-weight: 500; color: var(--secondary); }
.stat-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 28px;
  font-weight: 500;
  line-height: 1.3;
}
.stat-sub { font-size: 13px; color: var(--secondary); }

/* --- traffic chart (server-rendered bars, no JS required) ------------ */
.chart {
  display: flex;
  align-items: flex-end;
  gap: 2px;
  height: 180px;
  padding: var(--space-2) 0 0;
  border-bottom: 2px solid var(--border-strong);
  margin: var(--space-4) 0 var(--space-2);
}
.chart-bar {
  flex: 1 1 0;
  min-width: 3px;
  background: var(--secondary);
}
/* tap affordance arrives with JS only: without it the bars are not
   clickable and no cursor promises otherwise */
.chart-live .chart-bar { cursor: pointer; }
.bar-readout { color: var(--secondary); font-size: 13px; margin: var(--space-2) 0 0; }
.chart-axis {
  display: flex;
  justify-content: space-between;
  color: var(--secondary);
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

/* --- usage meter ------------------------------------------------------ */
.meter {
  height: 12px;
  background: var(--panel);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-small);
  overflow: hidden;
  margin: var(--space-3) 0;
  max-width: 60ch;
}
.meter-fill { height: 100%; background: var(--secondary); }
.meter-fill.is-over { background: var(--accent-fill); }

/* --- wizard progress -------------------------------------------------- */
.steps {
  list-style: none;
  margin: 0 0 var(--space-6);
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-6);
  border-bottom: 1px solid var(--border);
  padding-bottom: var(--space-3);
}
.steps li { color: var(--secondary); font-size: 14px; }
.steps li.is-current { color: var(--accent-ink); font-weight: 600; }

.steps-manual,
.creds {
  margin: 0 0 var(--space-4);
  padding: 0;
}
.steps-manual { counter-reset: step; list-style: none; }
.steps-manual > li {
  counter-increment: step;
  border-top: 1px solid var(--border);
  padding: var(--space-4) 0 var(--space-6);
}
.steps-manual > li::before {
  content: counter(step) ". ";
  color: var(--secondary);
  font-weight: 500;
}

.creds > div {
  border-top: 1px solid var(--border);
  padding: var(--space-3) 0;
}
.creds dt { font-size: 13px; font-weight: 500; color: var(--secondary); margin: 0 0 var(--space-2); }
.creds dd {
  margin: 0;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  min-height: 44px;
}
.creds code { font-size: 14px; }

/* --- plans ------------------------------------------------------------ */
.plan-row {
  border-top: 1px solid var(--border-strong);
  padding: var(--space-4) 0;
  display: grid;
  gap: var(--space-3);
}
.plan-head { display: flex; align-items: center; gap: var(--space-3); }
.plan-head h3 { margin: 0; }
.plan-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-2) var(--space-6);
  margin: 0;
}
.plan-facts dt { font-size: 13px; font-weight: 500; color: var(--secondary); }
.plan-facts dd { margin: 0; font-size: 14px; }

/* --- cards (only where containment communicates; DESIGN.md §4) -------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: var(--space-4);
  margin: 0 0 var(--space-4);
  max-width: 72ch;
}

/* --- login ------------------------------------------------------------ */
.login-panel h1 { text-align: center; }
.login-panel .lede { text-align: center; margin-bottom: var(--space-6); }
.login-form { margin-top: var(--space-4); }
.login-form .field { margin-bottom: var(--space-4); }
.login-form .btn { margin-top: var(--space-4); }
.login-panel .fineprint { text-align: center; margin-top: var(--space-4); }

/* --- public home ------------------------------------------------------ */
.home { text-align: left; }
.home .lede { font-size: 16px; }
.home .cta-row { margin: var(--space-6) 0 var(--space-2); }
.facts { margin-top: var(--space-8); }
.facts h2 { border-top: 1px solid var(--border); padding-top: var(--space-6); }
.fact { border-top: 1px solid var(--border); padding: var(--space-4) 0; }
.fact h3 { margin-bottom: var(--space-1); }
.fact p { color: var(--secondary); font-size: 14px; margin: 0; }
.home .guide-link { margin-top: var(--space-6); }
.returning { margin: var(--space-3) 0 0; }
.returning a { display: inline-flex; align-items: center; min-height: 44px; }

/* --- doc prose (mdToHTML output) -------------------------------------- */
.doc { max-width: 72ch; }
.doc-prose h1 { margin-top: var(--space-8); }
.doc-prose h2 { margin-top: var(--space-8); }
.doc-prose h3 { margin-top: var(--space-6); }
.doc-prose p,
.doc-prose ul,
.doc-prose ol { max-width: 60ch; }
.doc-prose ul,
.doc-prose ol { margin: 0 0 var(--space-4) var(--space-6); }
.doc-prose li { margin-bottom: var(--space-1); }
.doc-prose pre {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-3) var(--space-4);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 14px;
}
.doc-prose pre code { background: transparent; border: 0; padding: 0; color: inherit; }
.doc-prose table {
  border-collapse: collapse;
  width: 100%;
  margin: 0 0 var(--space-4);
  font-size: 14px;
}
.doc-prose th,
.doc-prose td {
  border: 1px solid var(--border-strong);
  padding: var(--space-2) var(--space-3);
  text-align: left;
  vertical-align: top;
}
.doc-prose thead th { background: var(--panel); }

/* --- motion policy (DESIGN.md §6: interaction feedback only) --------- */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
  .btn:active { transform: none; }
  .skip-link { transition: none; }
}