/* Copyright (c) 2026 Luke P. All rights reserved.
   processcontroltools — Proprietary Software. Unauthorised use prohibited.

   Site design system (light). Used by base_site.html, which every page extends.
   Tool and admin pages load Bootstrap before this file and tools.css after it.
   Fonts: Newsreader (prose + headings), IBM Plex Sans (interface), IBM Plex Mono (measured values).
   Dark tokens are intentionally not shipped (light only, decided 2026-10-01). */

/* ── Tokens ── */
:root {
  color-scheme: light;
  --bg: #fbfbfa;
  --panel: #ffffff;
  --inset: #f2f3f2;
  --ink: #15191c;
  --ink-2: #454c52;
  --ink-3: #5c656b;
  --rule: #dcdfe0;
  --rule-strong: #8b9498;
  --accent: #0b6b74;
  --on-accent: #ffffff;
  --warn: #b86200;
  --warn-text: #9a5200;   /* amber for small text (5.9:1 on white) */
  --crit: #c0301c;
  --ok: #1f6b3a;

  --serif: "Newsreader", "Source Serif 4", Georgia, serif;
  --sans: "IBM Plex Sans", system-ui, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Consolas, monospace;
}

/* ── Base ── */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scrollbar-color: var(--rule-strong) var(--bg); scroll-behavior: auto; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 400 1rem/1.55 var(--sans); font-variant-numeric: lining-nums;
}
::selection { background: color-mix(in srgb, var(--accent) 30%, transparent); }
a { color: var(--accent); text-underline-offset: .18em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
h1, h2, h3 { margin: 0; font-family: var(--serif); font-weight: 400; text-wrap: balance; }
p { margin: 0; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: 8px; top: -48px; background: var(--ink); color: var(--bg); padding: 10px 14px; z-index: 10; }
.skip:focus { top: 8px; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 24px; }

/* ── Navigation + brand mark (the real script L, recoloured by mask) ── */
.site-nav { background: var(--bg); border-bottom: 1px solid var(--rule); }
.site-nav .wrap { display: flex; align-items: center; gap: 20px; min-height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; }
.mk { width: 32px; height: 32px; border: 1.5px solid var(--ink); border-radius: 8px; display: grid; place-items: center; flex: none; }
.mk i {
  display: block; width: 20px; height: 18px; background: var(--ink);
  -webkit-mask: url("../img/mark-l.png") center / contain no-repeat;
          mask: url("../img/mark-l.png") center / contain no-repeat;
}
.wm { font: 600 1.0625rem/1 var(--sans); letter-spacing: -.005em; }
.site-nav ul { list-style: none; margin: 0 0 0 auto; padding: 0; display: flex; align-items: center; gap: 4px; }
.site-nav li a:not(.button) { display: block; padding: 8px 10px; color: var(--ink-2); text-decoration: none; font-size: .9375rem; }
.site-nav li a:not(.button):hover { color: var(--ink); text-decoration: underline; }
.site-nav li a[aria-current] { color: var(--ink); font-weight: 600; }
.button.menu-btn { display: none; margin-left: auto; }

/* ── Buttons ── */
.button {
  display: inline-block; font: 500 .9375rem/1 var(--sans); padding: 11px 18px;
  border: 1px solid var(--accent); background: var(--accent); color: var(--on-accent);
  text-decoration: none; border-radius: 3px; cursor: pointer;
}
.button:hover { background: color-mix(in srgb, var(--accent) 86%, var(--ink)); text-decoration: none; }
.button.ghost { background: transparent; color: var(--ink); border-color: var(--rule-strong); }
.button.ghost:hover { background: var(--inset); }
.button.sm { padding: 8px 14px; font-size: .875rem; }
.button.block { display: block; width: 100%; text-align: center; }

/* ── Section scaffolding ── */
.sec { border-top: 1px solid var(--rule-strong); padding: 22px 0 60px; }
.sec-head { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; margin-bottom: 22px; flex-wrap: wrap; }
.sec-head h2 { font-size: 1.75rem; letter-spacing: -.01em; }
.sec-head span { color: var(--ink-3); font-size: .875rem; }
.page { padding-top: 40px; padding-bottom: 64px; }
.page-head { margin-bottom: 28px; padding-bottom: 18px; border-bottom: 1px solid var(--rule-strong); }
.page-head h1 { font-size: 2rem; letter-spacing: -.01em; }
.page-head p { margin-top: 8px; color: var(--ink-2); font: 400 1.0625rem/1.5 var(--serif); max-width: 46em; }

/* ── Flash messages ── */
.flashes { margin: 20px 0 0; display: grid; gap: 8px; }
.flash { padding: 11px 14px; border: 1px solid var(--rule-strong); background: var(--panel); font-size: .9375rem; }
.flash-success { border-color: var(--ok); }
.flash-danger, .flash-error { border-color: var(--crit); }
.flash-warning { border-color: var(--warn); }
.flash-info { border-color: var(--accent); }

/* ── Hero ── */
.hero { padding: 60px 0 68px; }
.hero .wrap { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 52px; align-items: center; }
.hero h1 { font-size: clamp(2.25rem, 3.6vw, 3rem); line-height: 1.08; letter-spacing: -.015em; }
.hero .lede { margin-top: 20px; font: 400 1.25rem/1.5 var(--serif); color: var(--ink-2); max-width: 34em; }
.hero .cta { margin-top: 30px; display: flex; flex-wrap: wrap; gap: 12px; }
.hero .note { margin-top: 18px; color: var(--ink-3); font: italic 400 1.0625rem/1.45 var(--serif); max-width: 36em; }

/* ── Figure ── */
.fig { margin: 0; background: var(--panel); border: 1px solid var(--rule); padding: 16px 16px 12px; }
.fig .cap { margin-top: 12px; padding-top: 10px; border-top: 1px solid var(--rule); color: var(--ink-2); font: 400 .9688rem/1.45 var(--serif); }
.fig .cap b { font: 500 .8125rem/1 var(--mono); color: var(--ink); margin-right: 6px; }
.synthetic { color: var(--ink-3); font-style: italic; }

/* ── Heatmap (RGA output) ── */
table.hm { border-collapse: separate; border-spacing: 3px; width: 100%; table-layout: fixed; }
table.hm th { font-size: .8125rem; font-weight: 500; color: var(--ink-2); padding: 4px; text-align: center; vertical-align: bottom; line-height: 1.2; }
table.hm tbody th { text-align: right; padding-right: 8px; width: 26%; vertical-align: middle; }
table.hm td.corner { width: 26%; }
table.hm td { position: relative; text-align: center; padding: 0; height: 46px; }
table.hm td .v { font: 400 .9375rem var(--mono); }
table.hm td.crit .v { font-weight: 500; }
table.hm td .f { position: absolute; top: 3px; right: 5px; font: 500 .6875rem/1 var(--mono); }
table.hm td.ok   { background: color-mix(in srgb, var(--accent) calc(var(--t) * 22%), var(--panel)); }
table.hm td.warn { background: color-mix(in srgb, var(--warn) 34%, var(--panel)); outline: 2px dashed var(--warn); outline-offset: -2px; }
table.hm td.crit { background: color-mix(in srgb, var(--crit) 46%, var(--panel)); outline: 2px solid var(--crit); outline-offset: -2px; }
.legend { list-style: none; display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 10px 0 0; padding: 0; font-size: .8125rem; color: var(--ink-2); }
.legend li { display: flex; align-items: center; gap: 7px; }
.sw { display: inline-block; width: 12px; height: 12px; border: 1px solid var(--rule-strong); flex: none; }
.sw.ok   { background: color-mix(in srgb, var(--accent) 22%, var(--panel)); }
.sw.warn { background: color-mix(in srgb, var(--warn) 34%, var(--panel)); border: 2px dashed var(--warn); }
.sw.crit { background: color-mix(in srgb, var(--crit) 46%, var(--panel)); border: 2px solid var(--crit); }

/* ── Data tables ── */
.tscroll { overflow-x: auto; max-width: 100%; }
table.data { border-collapse: collapse; width: 100%; font-size: .9375rem; }
table.data th, table.data td { text-align: left; padding: 11px 12px; border-bottom: 1px solid var(--rule); vertical-align: top; }
table.data thead th {
  font: 500 .6875rem/1.2 var(--mono); letter-spacing: .07em; text-transform: uppercase; color: var(--ink-3);
  background: var(--inset); border-bottom: 1px solid var(--rule-strong); white-space: nowrap; vertical-align: bottom;
}
table.data tbody th { font: 500 1.0625rem/1.35 var(--serif); }
table.data td.mute { color: var(--ink-3); }
table.data td.act { text-align: right; white-space: nowrap; }
table.data.wide { min-width: 0; }
.status { font-weight: 500; white-space: nowrap; }
.status.off { color: var(--ink-3); font-weight: 400; }
.status.admin { color: var(--warn-text); }
.who { display: block; margin-top: 2px; color: var(--ink-3); font-size: .8125rem; }

/* ── Notes (definition list) ── */
dl.notes { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0 44px; margin: 0; }
dl.notes dt { font: 500 1.25rem/1.3 var(--serif); margin-bottom: 6px; }
dl.notes dd { margin: 0; color: var(--ink-2); max-width: 36em; font: 400 1.0938rem/1.5 var(--serif); }
.byline { display: block; margin-top: 12px; font: 400 .9375rem/1.4 var(--sans); color: var(--ink-3); }
.byline-name { color: var(--ink); font-weight: 500; }
.byline a { display: inline-block; margin-top: 3px; }

/* ── Forms ── */
.field { margin-bottom: 18px; }
.field label { display: block; font-weight: 500; font-size: .875rem; margin-bottom: 6px; color: var(--ink); }
.input, .field input[type="text"], .field input[type="email"], .field input[type="password"], .field textarea {
  display: block; width: 100%; font: 400 1rem/1.4 var(--sans); color: var(--ink);
  background: var(--panel); border: 1px solid var(--rule-strong); border-radius: 3px; padding: 10px 12px;
}
.field textarea { min-height: 150px; resize: vertical; font-family: var(--sans); }
.field input:focus, .field textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }
.field input[aria-invalid="true"], .field textarea[aria-invalid="true"] { border-color: var(--crit); }
.field-error { margin-top: 6px; color: var(--crit); font-size: .875rem; }
.check { display: flex; align-items: center; gap: 8px; margin-bottom: 18px; font-size: .9375rem; }
.check input { width: 16px; height: 16px; accent-color: var(--accent); }
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }

/* ── Auth card ── */
.auth { max-width: 440px; margin: 56px auto 80px; }
.auth h1 { font-size: 2rem; letter-spacing: -.01em; }
.auth .sub { margin-top: 8px; color: var(--ink-2); font: 400 1.0313rem/1.5 var(--serif); }
.auth form { margin-top: 24px; background: var(--panel); border: 1px solid var(--rule); padding: 24px; }
.auth .alt { margin-top: 16px; color: var(--ink-2); font-size: .9375rem; }

/* ── Contact ── */
.contact { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 52px; }
.contact p.contact-lead { color: var(--ink-2); font: 400 1.125rem/1.5 var(--serif); max-width: 30em; }
.contact form { background: var(--panel); border: 1px solid var(--rule); padding: 24px; }
.contact .result { margin-bottom: 18px; padding: 11px 14px; border: 1px solid var(--rule-strong); background: var(--panel); font-size: .9375rem; }
.contact .result.ok { border-color: var(--ok); }
.contact .result.bad { border-color: var(--crit); }

/* ── Blog ── */
.post { padding: 20px 0; border-bottom: 1px solid var(--rule); max-width: 46em; }
.post time { font: 400 .8125rem var(--mono); color: var(--ink-3); }
.post h2 { font-size: 1.75rem; margin: 6px 0; }
.post p { color: var(--ink-2); font: 400 1.0625rem/1.5 var(--serif); }
.empty { color: var(--ink-2); font: 400 1.125rem/1.5 var(--serif); max-width: 40em; }

/* ── Footer ── */
.foot { border-top: 1px solid var(--rule-strong); padding: 24px 0 40px; color: var(--ink-3); font-size: .875rem; }
.foot .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 32px; }
.foot a { color: var(--ink-2); }

/* ── Responsive ── */
@media (max-width: 1100px) { table.data.wide { min-width: 560px; } }
@media (max-width: 900px) {
  .hero .wrap, .contact { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  dl.notes { grid-template-columns: minmax(0, 1fr); gap: 22px; }
}
@media (max-width: 720px) {
  /* Tool tables restack on phones: name + status on one line, description and action below.
     Sideways scrolling would hide the description, which is the column that matters. */
  table.data.wide { min-width: 0; }
  table.data.wide thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  table.data.wide tbody tr { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 4px 12px; padding: 12px 0; border-bottom: 1px solid var(--rule); }
  table.data.wide tbody th, table.data.wide tbody td { display: block; padding: 0; border: 0; }
  table.data.wide tbody td:nth-child(2) { text-align: right; }
  table.data.wide tbody td:nth-child(3) { grid-column: 1 / -1; }
  table.data.wide tbody td.act { grid-column: 1 / -1; text-align: left; margin-top: 6px; }
  .wrap { padding-left: 16px; padding-right: 16px; }
  .button.menu-btn { display: inline-block; }
  .site-nav .wrap { flex-wrap: wrap; }
  .site-nav ul { display: none; flex-direction: column; align-items: stretch; width: 100%; margin: 0 0 12px; }
  .site-nav ul.open { display: flex; }
  .hero { padding: 32px 0 40px; }
  .auth { margin-top: 32px; }
  table.hm th { font-size: .6875rem; padding: 2px; }
  table.hm tbody th { width: 30%; }
  table.hm td { height: 42px; }
  table.hm td .v { font-size: .8125rem; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }