:root {
  color-scheme: dark;
  --in-bg: #181916;
  --in-bg-deep: #0f1110;
  --in-panel-olive: #363b2c;
  --in-panel: #20241f;
  --in-graphite: #252b2e;
  --in-amber: #ffb000;
  --in-amber-soft: rgba(255, 176, 0, 0.12);
  --in-muted: #aab0a7;
  --in-border: rgba(255, 176, 0, 0.26);
  --in-border-cool: rgba(206, 213, 194, 0.16);
  --in-paper: #ebe0b6;
  --in-radius-panel: 14px;
  --in-radius-control: 10px;
  --in-font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Consolas, monospace;
  --in-font-body: Inter, system-ui, -apple-system, Segoe UI, sans-serif;
  font-family: var(--in-font-body);
  background: var(--in-bg);
  color: #f5f0dc;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(rgba(255,255,255,.026) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.02) 1px, transparent 1px),
    linear-gradient(135deg, rgba(255,176,0,.08), transparent 32%),
    radial-gradient(circle at 88% 12%, rgba(100,111,74,.22), transparent 28%),
    linear-gradient(180deg, #1f221d 0%, var(--in-bg) 44%, #101211 100%);
  background-size: 28px 28px, 28px 28px, auto, auto, auto;
}
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .16;
  background: repeating-linear-gradient(0deg, transparent 0 14px, rgba(235,224,182,.08) 15px 16px);
  mask-image: linear-gradient(180deg, #000, transparent 78%);
}
a { color: #ffd172; text-underline-offset: .22em; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible { outline: 3px solid rgba(255,176,0,.58); outline-offset: 3px; }

.site-shell { width: min(1180px, calc(100% - 32px)); margin: 0 auto; padding: 18px 0 48px; }
.masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 12px 0 16px;
  border-bottom: 1px solid var(--in-border);
}
.brand { display: inline-flex; align-items: center; gap: 12px; color: #fff7dc; text-decoration: none; font-weight: 850; letter-spacing: .03em; }
.brand > span:last-child { display: grid; gap: 2px; }
.brand strong { font-family: var(--in-font-mono); font-size: 1.05rem; }
.brand small { color: var(--in-muted); font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; }
.brand-mark { display: inline-grid; place-items: center; width: 40px; height: 40px; border: 1px solid var(--in-border); border-radius: 8px; background: linear-gradient(135deg, rgba(255,176,0,.18), rgba(60,64,48,.7)); color: var(--in-amber); font-family: var(--in-font-mono); box-shadow: inset 0 0 0 1px rgba(0,0,0,.32); }
nav { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
nav a { color: #d8dbd1; text-decoration: none; border: 1px solid var(--in-border-cool); border-radius: 999px; padding: 8px 12px; font-size: .92rem; background: rgba(0,0,0,.12); }
nav a:hover { border-color: var(--in-border); color: #fff0bd; }
main { padding-top: 22px; }
.route-tag { display: flex; justify-content: space-between; gap: 10px; color: var(--in-muted); font: 800 .74rem/1.4 var(--in-font-mono); text-transform: uppercase; letter-spacing: .13em; margin-bottom: 14px; }

.site-notice, .hero, .panel, .instrument-result, .metadata, .manual-strip, .field-step {
  border: 1px solid var(--in-border-cool);
  border-radius: var(--in-radius-panel);
  background: linear-gradient(180deg, rgba(54,59,44,.9), rgba(28,32,28,.94));
  box-shadow: 0 20px 70px rgba(0,0,0,.28);
}
.site-notice { padding: 15px 18px; margin: 0 0 18px; border-color: var(--in-border); background: linear-gradient(90deg, rgba(255,176,0,.14), rgba(60,64,48,.72)); color: #ffe7a7; }
.site-notice p { margin: 6px 0 0; }
.section-label, .kicker, .file-tab, .step-eyebrow { color: var(--in-amber); font: 850 .74rem/1.2 var(--in-font-mono); text-transform: uppercase; letter-spacing: .14em; }

.hero { padding: clamp(24px, 4vw, 46px); margin-bottom: 18px; }
.field-brief { position: relative; overflow: hidden; border-color: rgba(255,176,0,.22); background: linear-gradient(180deg, rgba(60,64,48,.86), rgba(23,26,24,.95)); }
.field-brief::after {
  content: '';
  position: absolute;
  left: 24px;
  right: 24px;
  bottom: 18px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,176,0,.45), transparent);
}
.hero.compact { background: linear-gradient(135deg, rgba(60,64,48,.92), rgba(37,43,46,.94)); }
h1, h2, h3, .instrument-result strong { font-family: var(--in-font-mono); letter-spacing: -.045em; color: #fff8de; }
h1 { margin: .06em 0 .1em; font-size: clamp(2rem, 3.85vw, 3.8rem); line-height: .92; max-width: none; text-wrap: balance; }
h2 { margin: 0 0 10px; font-size: clamp(1.2rem, 2.2vw, 1.65rem); }
h3 { margin: 18px 0 10px; }
p { line-height: 1.65; }
.hero-lede { max-width: 1030px; color: #d7dacd; font-size: clamp(1rem, 1.45vw, 1.18rem); }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 22px; }
.cta, button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 12px 16px;
  border-radius: var(--in-radius-control);
  border: 1px solid rgba(255,176,0,.45);
  background: var(--in-amber);
  color: #17120a;
  font: 850 .95rem/1 var(--in-font-body);
  text-decoration: none;
  cursor: pointer;
}
.cta.secondary, .ghost-button { background: rgba(255,255,255,.055); color: #fff0bd; border-color: var(--in-border-cool); }
.cta.inline { margin-top: 8px; }
button:hover, .cta:hover { filter: brightness(1.06); }
.ghost-button { margin-top: 10px; }

.brief-strip { list-style: none; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 8px; margin: 26px 0 0; padding: 0; }
.brief-strip li { border: 1px solid rgba(255,176,0,.2); border-radius: 10px; padding: 10px; background: rgba(0,0,0,.18); }
.brief-strip strong { display: block; color: var(--in-amber); font-family: var(--in-font-mono); }
.brief-strip span { color: #f1edd8; font-size: .92rem; }

.panel-grid, .calculator-layout, .workflow-grid { display: grid; gap: 16px; }
.panel-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.panel-grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.panel, .manual-strip, .instrument-result, .field-step { padding: 20px; }
.panel { background: linear-gradient(180deg, rgba(37,43,46,.86), rgba(24,27,26,.92)); }
.field-file { position: relative; padding-top: 42px; border-style: solid; }
.field-file::before { content: ''; position: absolute; inset: 0 0 auto 0; height: 5px; border-radius: var(--in-radius-panel) var(--in-radius-panel) 0 0; background: linear-gradient(90deg, var(--in-amber), transparent); opacity: .7; }
.file-tab { position: absolute; top: 16px; left: 20px; }
.field-file a { font-weight: 800; }
.ruled-section { margin: 22px 0; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 12px; margin-bottom: 10px; padding-bottom: 8px; border-bottom: 1px solid var(--in-border); }
.section-heading h2 { margin: 0; }
.manual-strip { margin: 18px 0; background: rgba(37,43,46,.78); }
.manual-strip ol { display: grid; gap: 8px; padding-left: 22px; }
.firing-table { border-color: rgba(255,176,0,.2); }

.calculator-layout { grid-template-columns: minmax(280px, .86fr) minmax(320px, 1.14fr); align-items: start; }
.control-panel label { display: block; margin: 14px 0 7px; font-weight: 800; color: #efe9c5; }
.field-help { margin: 6px 0 2px; color: #aeb7ad; font-size: .92rem; }
input, select {
  width: 100%;
  padding: 12px 13px;
  border-radius: var(--in-radius-control);
  border: 1px solid rgba(255,255,255,.16);
  background: #111513;
  color: #fffbea;
  font: inherit;
}
.error { color: #ffb0a2; font-weight: 800; margin: 10px 0 0; }
.instrument-result { min-height: 100%; border-color: var(--in-border); background: radial-gradient(circle at 80% 8%, rgba(255,176,0,.14), transparent 32%), linear-gradient(180deg, #20271f, #121616); }
.instrument-result .readout-value { display: inline-flex; align-items: baseline; gap: 8px; margin: 8px 0 4px; color: #ffe097; font: 900 clamp(2.4rem, 7vw, 5rem)/.9 var(--in-font-mono); }
.instrument-result .readout-value span { font-size: .45em; color: var(--in-muted); }
.result-warning { margin-top: 14px; }
.form-warning { background: linear-gradient(90deg, rgba(255,176,0,.17), rgba(70,55,28,.62)); }

.metadata-list { display: grid; grid-template-columns: minmax(170px, 250px) minmax(0, 1fr); gap: 8px 14px; margin: 0; }
.metadata-list dt { color: var(--in-amber); font-family: var(--in-font-mono); overflow-wrap: anywhere; }
.metadata-list dd { margin: 0; color: #e4e2d5; overflow-wrap: anywhere; }
.workflow-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.field-step { display: grid; grid-template-columns: auto 1fr; gap: 14px; align-items: start; background: linear-gradient(180deg, rgba(60,64,48,.75), rgba(31,35,31,.88)); }
.step-number { display: inline-grid; place-items: center; width: 42px; height: 42px; border: 1px solid var(--in-border); border-radius: 8px; color: var(--in-amber); font: 900 .9rem/1 var(--in-font-mono); background: rgba(0,0,0,.18); }
.step-eyebrow { margin: 0 0 6px; }
.placeholder-list { margin: 0; padding-left: 20px; }
.placeholder-list li { margin: 8px 0; }
.site-footer { display: grid; gap: 8px; margin-top: 34px; padding-top: 18px; border-top: 1px solid var(--in-border-cool); color: var(--in-muted); font-size: .95rem; }
.site-footer p { margin: 6px 0; }
code { color: #ffe097; background: rgba(255,176,0,.1); border: 1px solid rgba(255,176,0,.18); border-radius: 6px; padding: 1px 5px; overflow-wrap: anywhere; }

@media (max-width: 900px) {
  .calculator-layout, .panel-grid.two, .panel-grid.three, .workflow-grid, .brief-strip { grid-template-columns: 1fr; }
  .workflow-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  h1, .hero-lede { max-width: none; }
}
@media (max-width: 640px) {
  .site-shell { width: min(100% - 22px, 1180px); padding-top: 10px; }
  .masthead { align-items: flex-start; flex-direction: column; }
  nav { justify-content: flex-start; }
  nav a { padding: 8px 10px; }
  .route-tag { flex-direction: column; }
  .hero, .panel, .manual-strip, .instrument-result, .field-step { padding: 17px; }
  h1 { font-size: clamp(2.05rem, 12vw, 3.35rem); }
  .metadata-list { grid-template-columns: 1fr; }
  .workflow-grid { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
}