/* Istacap — industrial precision: steel neutrals, a signal amber, drafted type. */
:root {
  --ground: #f4f6f8;
  --surface: #ffffff;
  --surface-2: #eef2f5;
  --ink: #0f1519;
  --ink-2: #57646f;
  --ink-3: #7c8994;
  --rule: #d7dee4;
  --rule-2: #c3cdd5;
  --accent: #a65a00;
  --accent-soft: #f6e9d6;
  --steel: #27485e;
  --steel-soft: #e2eaf0;
  --good: #2c6b4f;
  --good-soft: #e3f0e9;
  --warn: #9a6100;
  --warn-soft: #fbeed8;
  --crit: #98332b;
  --crit-soft: #f7e4e2;
  --shadow: 0 1px 2px rgba(15,21,25,.05), 0 8px 24px -18px rgba(15,21,25,.35);
  --radius: 3px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { line-height: 1.15; margin: 0 0 .6rem; font-weight: 700; letter-spacing: -.01em; }
h1 { font-size: clamp(1.9rem, 4vw, 2.6rem); }
h2 { font-size: 1.4rem; margin-top: 2rem; }
h3 { font-size: 1.1rem; margin-top: 1.5rem; }
p { margin: 0 0 1rem; }
a { color: var(--accent); }

.mono, code, .tag, .kv dt, .stat-v {
  font-family: "Cascadia Mono", Consolas, "SF Mono", Menlo, monospace;
}

/* ---------- layout ---------- */
.shell { max-width: 1060px; margin: 0 auto; padding: 0 1.25rem; }
.narrow { max-width: 720px; }

header.top {
  background: var(--surface);
  border-bottom: 1px solid var(--rule);
  position: sticky; top: 0; z-index: 30;
}
.top-in {
  max-width: 1060px; margin: 0 auto; padding: .8rem 1.25rem;
  display: flex; align-items: center; gap: 1.4rem;
}
.brand {
  font-weight: 700; font-size: 1.05rem; letter-spacing: -.02em;
  text-decoration: none; color: var(--ink); display: flex; align-items: baseline; gap: .5rem;
}
.brand .mark { color: var(--accent); }
.brand small {
  font-size: .62rem; letter-spacing: .13em; text-transform: uppercase;
  color: var(--ink-3); font-weight: 600;
}
nav.top-nav { margin-left: auto; display: flex; gap: 1.1rem; align-items: center; }
nav.top-nav a {
  text-decoration: none; color: var(--ink-2); font-size: .92rem; font-weight: 500;
  padding: .3rem 0; border-bottom: 2px solid transparent;
}
nav.top-nav a:hover { color: var(--ink); border-bottom-color: var(--rule-2); }
nav.top-nav a.on { color: var(--ink); border-bottom-color: var(--accent); }

main { padding: 2rem 0 5rem; }
footer.bot {
  border-top: 1px solid var(--rule); padding: 1.6rem 0; margin-top: 3rem;
  color: var(--ink-3); font-size: .82rem;
}

/* ---------- cards & panels ---------- */
.card {
  background: var(--surface); border: 1px solid var(--rule);
  border-radius: var(--radius); padding: 1.4rem; box-shadow: var(--shadow);
  margin-bottom: 1.2rem;
}
.card.tight { padding: 1rem 1.15rem; }
.card h2:first-child, .card h3:first-child { margin-top: 0; }

.grid { display: grid; gap: 1.2rem; }
@media (min-width: 760px) { .grid-2 { grid-template-columns: 1fr 1fr; } }
@media (min-width: 900px) { .grid-3 { grid-template-columns: repeat(3, 1fr); } }

.eyebrow {
  font-size: .68rem; letter-spacing: .16em; text-transform: uppercase;
  color: var(--accent); font-weight: 700; margin-bottom: .5rem;
}
.lede { font-size: 1.12rem; color: var(--ink-2); }
.muted { color: var(--ink-2); }
.small { font-size: .86rem; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .5rem; cursor: pointer;
  background: var(--accent); color: #fff; border: 1px solid var(--accent);
  padding: .6rem 1.15rem; border-radius: var(--radius); font-size: .94rem;
  font-weight: 600; text-decoration: none; font-family: inherit;
}
.btn:hover { filter: brightness(1.08); }
.btn.secondary { background: var(--surface); color: var(--ink); border-color: var(--rule-2); }
.btn.secondary:hover { background: var(--surface-2); filter: none; }
.btn.danger { background: var(--crit); border-color: var(--crit); }
.btn.small { padding: .35rem .7rem; font-size: .84rem; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* ---------- forms ---------- */
label { display: block; font-weight: 600; font-size: .9rem; margin: 0 0 .3rem; }
label .hint { display: block; font-weight: 400; color: var(--ink-2); font-size: .84rem; margin-top: .1rem; }
input[type=text], input[type=email], input[type=number], input[type=file], textarea, select {
  width: 100%; padding: .58rem .7rem; font-size: .95rem; font-family: inherit;
  border: 1px solid var(--rule-2); border-radius: var(--radius);
  background: var(--surface); color: var(--ink);
}
input:focus, textarea:focus, select:focus {
  outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent);
}
.field { margin-bottom: 1rem; }
.row { display: flex; gap: 1rem; flex-wrap: wrap; }
.row > * { flex: 1 1 200px; }

/* ---------- status chips ---------- */
.tag {
  display: inline-block; padding: .16rem .5rem; border-radius: 2px;
  font-size: .7rem; font-weight: 600; letter-spacing: .04em; text-transform: uppercase;
  border: 1px solid transparent;
}
.tag.good { background: var(--good-soft); color: var(--good); border-color: #b9d8c9; }
.tag.warn { background: var(--warn-soft); color: var(--warn); border-color: #ecd3a5; }
.tag.crit { background: var(--crit-soft); color: var(--crit); border-color: #e6bdb8; }
.tag.info { background: var(--steel-soft); color: var(--steel); border-color: #bcd0dd; }
.tag.flat { background: var(--surface-2); color: var(--ink-2); border-color: var(--rule); }

/* ---------- tables ---------- */
.tablewrap { overflow-x: auto; border: 1px solid var(--rule); border-radius: var(--radius); background: var(--surface); }
table { border-collapse: collapse; width: 100%; font-size: .9rem; }
th {
  text-align: left; background: var(--surface-2); padding: .6rem .8rem;
  font-size: .68rem; letter-spacing: .1em; text-transform: uppercase;
  color: var(--ink-2); border-bottom: 1px solid var(--rule-2); white-space: nowrap;
}
td { padding: .65rem .8rem; border-bottom: 1px solid var(--rule); vertical-align: top; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover td { background: var(--surface-2); }

/* ---------- ladder ---------- */
.ladder { display: flex; flex-direction: column-reverse; }
.rung {
  display: grid; grid-template-columns: 2.6rem 1fr; gap: .8rem; align-items: start;
  background: var(--surface); border: 1px solid var(--rule);
  border-left: 3px solid var(--rc, var(--steel));
  border-radius: var(--radius); padding: .7rem .9rem;
}
.rung .rid { font-weight: 700; color: var(--rc, var(--steel)); font-size: .82rem; }
.rung b { display: block; font-size: .95rem; }
.rung span { display: block; font-size: .86rem; color: var(--ink-2); }
.gate {
  display: flex; align-items: center; gap: .5rem; padding: .35rem 0 .35rem 2.6rem;
  font-size: .72rem; letter-spacing: .05em; text-transform: uppercase;
  color: var(--accent); font-weight: 700;
}
.gate::after { content: ""; flex: 1; border-top: 1px dashed var(--rule-2); }

/* ---------- timeline ---------- */
.timeline { list-style: none; margin: 0; padding: 0; }
.timeline li {
  position: relative; padding: 0 0 1.1rem 1.6rem;
  border-left: 2px solid var(--rule); margin-left: .35rem;
}
.timeline li:last-child { border-left-color: transparent; padding-bottom: 0; }
.timeline li::before {
  content: ""; position: absolute; left: -.42rem; top: .38rem;
  width: .7rem; height: .7rem; border-radius: 50%;
  background: var(--surface); border: 2px solid var(--accent);
}
.timeline .when { font-size: .76rem; color: var(--ink-3); }
.timeline .what { font-weight: 600; font-size: .94rem; }
.timeline .who { font-size: .85rem; color: var(--ink-2); }

/* ---------- callouts ---------- */
.note {
  border-left: 3px solid var(--accent); background: var(--accent-soft);
  padding: .85rem 1rem; border-radius: 0 var(--radius) var(--radius) 0;
  font-size: .92rem; margin: 1rem 0;
}
.note.good { border-color: var(--good); background: var(--good-soft); }
.note.crit { border-color: var(--crit); background: var(--crit-soft); }
.note.flat { border-color: var(--rule-2); background: var(--surface-2); }
.note p:last-child { margin-bottom: 0; }

/* ---------- stats ---------- */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 0; border: 1px solid var(--rule); border-radius: var(--radius); overflow: hidden; background: var(--surface); }
.stat { padding: .9rem 1rem; border-right: 1px solid var(--rule); }
.stat:last-child { border-right: 0; }
.stat-k { font-size: .66rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-3); }
.stat-v { font-size: 1.35rem; font-weight: 700; margin-top: .15rem; }

ul.clean { list-style: none; padding: 0; margin: 0; }
ul.clean li { padding: .3rem 0; }
.check::before { content: "\2713"; color: var(--good); font-weight: 700; margin-right: .5rem; }
.cross::before { content: "\2715"; color: var(--crit); font-weight: 700; margin-right: .5rem; }

@media print {
  header.top, footer.bot, .no-print { display: none !important; }
  body { background: #fff; }
  .card { box-shadow: none; break-inside: avoid; }
}

/* ---------- demo strip ---------- */
.demo-strip {
  background: var(--warn-soft);
  border-bottom: 1px solid #ecd3a5;
  color: #6f4700;
  font-size: .84rem;
  padding: .5rem 0;
}
.demo-strip a { color: #6f4700; text-decoration: underline; }
@media print { .demo-strip { display: none; } }