/* ==========================================================================
   VissRad — site styles
   Art direction: instrument-panel precision. Near-black steel surfaces,
   hairline rules, one red accent, monospaced data labels.
   ========================================================================== */

:root {
  /* Type scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.8125rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.2vw, 0.9375rem);
  --text-base: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1rem + 0.6vw, 1.4375rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.4rem);
  --text-3xl: clamp(2.5rem, 1.2rem + 3.8vw, 4.6rem);

  /* Spacing */
  --space-1: 0.25rem;  --space-2: 0.5rem;   --space-3: 0.75rem;
  --space-4: 1rem;     --space-5: 1.25rem;  --space-6: 1.5rem;
  --space-8: 2rem;     --space-10: 2.5rem;  --space-12: 3rem;
  --space-16: 4rem;    --space-20: 5rem;    --space-24: 6rem;
  --space-32: 8rem;

  /* Radius / motion */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-full: 9999px;
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Widths */
  --content-narrow: 680px;
  --content-default: 1040px;
  --content-wide: 1280px;

  /* Fonts */
  --font-display: 'Cabinet Grotesk', 'Satoshi', 'Segoe UI', sans-serif;
  --font-body: 'Satoshi', 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
}

/* ---------- Dark (brand default) ---------- */
:root,
[data-theme='dark'] {
  --color-bg: #12141a;
  --color-surface: #191c24;
  --color-surface-2: #1f232d;
  --color-surface-offset: #15171e;
  --color-border: #2e3440;
  --color-border-strong: #3d4453;
  --color-divider: #22262f;
  --color-text: #e8eaef;
  --color-text-muted: #9aa2b1;
  --color-text-faint: #6b7385;
  --color-text-inverse: #12141a;
  --color-primary: #e23a34;
  --color-primary-hover: #f0554e;
  --color-on-primary: #ffffff;
  --color-accent-text: #ff7069;   /* AA-safe red for small text on dark */
  --color-focus: #ff7069;
  --color-good: #4caf7d;
  --color-teal: #47b5b0;
  --color-amber: #e8b44a;
  --grid-line: rgba(255, 255, 255, 0.035);
  --img-veil: 0.62;
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.45);
}

/* ---------- Light ---------- */
[data-theme='light'] {
  --color-bg: #f4f5f8;
  --color-surface: #ffffff;
  --color-surface-2: #fafbfc;
  --color-surface-offset: #eceef2;
  --color-border: #d7dbe3;
  --color-border-strong: #bcc2cd;
  --color-divider: #e3e6ec;
  --color-text: #12141a;
  --color-text-muted: #566072;
  --color-text-faint: #7d8798;
  --color-text-inverse: #ffffff;
  --color-primary: #c22d27;
  --color-primary-hover: #a52520;
  --color-on-primary: #ffffff;
  --color-accent-text: #b3241f;
  --color-focus: #c22d27;
  --color-good: #237a4e;
  --color-teal: #1f7f7b;
  --color-amber: #9a6c12;
  --grid-line: rgba(18, 20, 26, 0.045);
  --img-veil: 0.5;
  --shadow-md: 0 8px 28px rgba(18, 20, 26, 0.09);
}

/* No prefers-color-scheme fallback by design: dark is the brand default for every
   visitor. Light applies only via [data-theme='light'], set by an explicit toggle. */

/* ==========================================================================
   Primitives
   ========================================================================== */

.wrap { width: 100%; max-width: var(--content-wide); margin-inline: auto; padding-inline: var(--space-6); }
.wrap--default { max-width: var(--content-default); }
.wrap--narrow { max-width: var(--content-narrow); }

section { position: relative; }
.section { padding-block: clamp(var(--space-16), 8vw, var(--space-32)); }
.section--tight { padding-block: clamp(var(--space-12), 5vw, var(--space-20)); }
.section--rule { border-top: 1px solid var(--color-divider); }
.section--panel { background: var(--color-surface-offset); }

/* Eyebrow / label */
.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-accent-text);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}
.eyebrow::before {
  content: '';
  width: 22px;
  height: 1px;
  background: var(--color-primary);
  flex: none;
}
.eyebrow--plain { color: var(--color-text-faint); }
.eyebrow--plain::before { background: var(--color-border-strong); }

/* Headings */
.h-hero { font-family: var(--font-display); font-size: var(--text-3xl); font-weight: 800; letter-spacing: -0.02em; }
.h-1 { font-family: var(--font-display); font-size: var(--text-2xl); font-weight: 800; letter-spacing: -0.018em; }
.h-2 { font-family: var(--font-display); font-size: var(--text-xl); font-weight: 700; letter-spacing: -0.012em; }
.h-3 { font-size: var(--text-lg); font-weight: 700; letter-spacing: -0.006em; }
.h-4 { font-size: var(--text-base); font-weight: 700; }

.lede { font-size: var(--text-lg); line-height: 1.5; color: var(--color-text-muted); max-width: 62ch; font-weight: 400; }
.body-muted { color: var(--color-text-muted); }
.small { font-size: var(--text-sm); color: var(--color-text-muted); }
.tiny { font-size: var(--text-xs); color: var(--color-text-faint); }
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

.measure { max-width: 62ch; }
.stack > * + * { margin-top: var(--space-4); }
.stack-lg > * + * { margin-top: var(--space-6); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  font-size: var(--text-sm); font-weight: 700; letter-spacing: 0.01em;
  padding: 0.8rem 1.4rem; border-radius: var(--radius-md);
  border: 1px solid transparent; text-decoration: none; white-space: nowrap;
}
.btn--primary { background: var(--color-primary); color: var(--color-on-primary); }
.btn--primary:hover { background: var(--color-primary-hover); }
.btn--ghost { border-color: var(--color-border-strong); color: var(--color-text); background: transparent; }
.btn--ghost:hover { border-color: var(--color-text-faint); background: color-mix(in oklab, var(--color-text) 6%, transparent); }
.btn--sm { padding: 0.55rem 0.95rem; font-size: var(--text-xs); }
.btn-row { display: flex; flex-wrap: wrap; gap: var(--space-3); }

/* Inline text link */
.link {
  color: var(--color-accent-text); text-decoration: none;
  border-bottom: 1px solid color-mix(in oklab, var(--color-primary) 45%, transparent);
  padding-bottom: 1px;
}
.link:hover { border-bottom-color: currentColor; }

/* Arrow link */
.arrow-link {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-size: var(--text-sm); font-weight: 700; color: var(--color-accent-text); text-decoration: none;
}
.arrow-link svg { flex: none; transition: transform var(--transition-interactive); }
.arrow-link:hover svg { transform: translateX(3px); }

/* Chip */
.chip {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: 0.06em; text-transform: uppercase;
  padding: 0.25rem 0.55rem; border-radius: var(--radius-sm);
  border: 1px solid var(--color-border); color: var(--color-text-muted); background: var(--color-surface);
}
.chip--accent { border-color: color-mix(in oklab, var(--color-primary) 50%, transparent); color: var(--color-accent-text); }
.chip--good { border-color: color-mix(in oklab, var(--color-good) 55%, transparent); color: var(--color-good); }

/* Card */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}
.card--flush { padding: 0; overflow: hidden; }
a.card { text-decoration: none; display: block; }
a.card:hover { border-color: var(--color-border-strong); transform: translateY(-2px); }

/* Feature list */
.feat { list-style: none; }
.feat li {
  position: relative; padding-left: var(--space-5);
  font-size: var(--text-sm); color: var(--color-text-muted); margin-bottom: var(--space-2);
}
.feat li::before {
  content: ''; position: absolute; left: 0; top: 0.6em;
  width: 7px; height: 1px; background: var(--color-primary);
}
.feat strong { color: var(--color-text); font-weight: 600; }

/* Grids */
.grid { display: grid; gap: var(--space-5); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 900px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 620px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: minmax(0, 1fr); } }

/* Split layout */
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(var(--space-8), 5vw, var(--space-20)); align-items: center; }
.split--copy-first { grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr); }
.split--top { align-items: start; }
@media (max-width: 900px) { .split, .split--copy-first { grid-template-columns: minmax(0, 1fr); gap: var(--space-10); } }

/* Section head */
.sec-head { max-width: 68ch; margin-bottom: clamp(var(--space-8), 4vw, var(--space-12)); }
.sec-head .lede { margin-top: var(--space-4); }

/* Blueprint grid backdrop */
.gridbg::before {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black, transparent 78%);
}
.gridbg > * { position: relative; }

/* ==========================================================================
   Header
   ========================================================================== */

/* The header, drawer and footer are the fixed chassis: always dark, in both
   themes, so the brand mark and accent never sit on a shifting surface. */
.header, .drawer, .footer {
  --color-text: #eceef2;
  --color-text-muted: #a4abb8;
  --color-text-faint: #7d8593;
  --color-border: #2e3440;
  --color-border-strong: #464e5e;
  --color-divider: #252a34;
  --color-surface: #191c24;
  --color-surface-offset: #0e1015;
  --color-accent-text: #ff7069;
  --color-primary: #e23a34;
  --color-primary-hover: #f0554e;
  --color-on-primary: #ffffff;
  color: var(--color-text);
}

.header {
  position: sticky; top: 0; z-index: 60;
  background: rgba(14, 16, 21, 0.9);
  backdrop-filter: blur(14px) saturate(1.2);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-interactive), background var(--transition-interactive);
}
.header--scrolled { border-bottom-color: var(--color-divider); background: rgba(14, 16, 21, 0.96); }
.header__inner {
  display: flex; align-items: center; gap: var(--space-6);
  height: 76px; max-width: var(--content-wide); margin-inline: auto; padding-inline: var(--space-6);
}

.logo { display: flex; align-items: center; gap: 0.66rem; text-decoration: none; color: var(--color-text); flex: none; }
.logo__mark { width: 54px; color: var(--color-primary); flex: none; }
.logo__type {
  font-family: var(--font-display); font-weight: 800; font-size: 1.34rem;
  letter-spacing: 0.11em; text-transform: uppercase; line-height: 1;
}

.header__tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.07em;
  color: var(--color-text-muted);
  white-space: nowrap;
  flex: none;
  margin-left: calc(var(--space-2) * -1);
  padding-top: 0.15em;
}
@media (max-width: 1140px) { .header__tag { display: none; } }

.nav { display: flex; align-items: center; gap: var(--space-1); margin-left: auto; }
.nav a {
  font-size: var(--text-sm); font-weight: 500; text-decoration: none; color: var(--color-text-muted);
  padding: 0.5rem 0.75rem; border-radius: var(--radius-sm);
}
.nav a:hover { color: var(--color-text); background: color-mix(in oklab, var(--color-text) 6%, transparent); }
.nav a[aria-current='page'] { color: var(--color-text); }
.nav a[aria-current='page']::after {
  content: ''; display: block; height: 2px; margin-top: 3px; background: var(--color-primary); border-radius: 2px;
}

.header__actions { display: flex; align-items: center; gap: var(--space-2); flex: none; }

.icon-btn {
  display: inline-grid; place-items: center; width: 36px; height: 36px;
  border-radius: var(--radius-sm); border: 1px solid var(--color-border); color: var(--color-text-muted);
}
.icon-btn:hover { color: var(--color-text); border-color: var(--color-border-strong); }

.burger { display: none; }
@media (max-width: 880px) {
  .nav { display: none; }
  .burger { display: inline-grid; }
  .header__actions { margin-left: auto; }
}
/* Below tablet the drawer carries the CTA, so the header one would only crowd
   the bar and push the burger off-screen. */
@media (max-width: 620px) {
  .header__actions > .btn { display: none; }
}

/* Mobile drawer */
.drawer {
  position: fixed; inset: 76px 0 auto 0; z-index: 55;
  background: #0e1015; border-bottom: 1px solid var(--color-border);
  padding: var(--space-4) var(--space-6) var(--space-8);
  display: none; flex-direction: column; gap: var(--space-1);
}
.drawer[data-open='true'] { display: flex; }
.drawer a {
  font-family: var(--font-display); font-size: var(--text-lg); font-weight: 700;
  text-decoration: none; padding: var(--space-3) 0; border-bottom: 1px solid var(--color-divider);
}
.drawer .btn { margin-top: var(--space-5); }

/* ==========================================================================
   Hero
   ========================================================================== */

/* The hero and spec strip stay dark in both themes — the photograph is the
   brand's strongest asset and a light veil destroys it. */
.hero, .specstrip {
  --color-text: #eceef2;
  --color-text-muted: #aab1be;
  --color-text-faint: #838b99;
  --color-border: #2e3440;
  --color-border-strong: #464e5e;
  --color-divider: #262b35;
  --color-surface: #191c24;
  --color-accent-text: #ff7069;
  --color-primary: #e23a34;
  --color-on-primary: #ffffff;
  color: var(--color-text);
  background-color: #0e1015;
}

.hero { position: relative; isolation: isolate; overflow: hidden; }
.hero__media { position: absolute; inset: 0; z-index: -2; }
.hero__media img { width: 100%; height: 100%; object-fit: cover; object-position: 62% 55%; }
.hero__media::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(100deg,
    rgba(14, 16, 21, 0.97) 0%,
    rgba(14, 16, 21, 0.9) 40%,
    rgba(14, 16, 21, 0.5) 76%,
    rgba(14, 16, 21, 0.34) 100%),
    linear-gradient(to bottom, rgba(14, 16, 21, 0.6), transparent 28%, rgba(14, 16, 21, 0.9));
}
.hero__inner {
  max-width: var(--content-wide); margin-inline: auto; padding: clamp(var(--space-16), 11vw, var(--space-32)) var(--space-6) clamp(var(--space-12), 8vw, var(--space-24));
  min-height: min(78vh, 720px); display: flex; flex-direction: column; justify-content: center;
}
.hero__title { max-width: 20ch; }
.hero__title em { font-style: normal; color: var(--color-accent-text); }
.hero__lede { margin-top: var(--space-6); max-width: 54ch; }
.hero__cta { margin-top: var(--space-8); }

/* Spec strip */
.specstrip {
  border-top: 1px solid #22262f;
  border-bottom: 1px solid var(--color-divider);
}
.specstrip__inner {
  max-width: var(--content-wide); margin-inline: auto; padding: var(--space-4) var(--space-6);
  display: flex; flex-wrap: wrap; gap: var(--space-3) var(--space-8);
  font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--color-text-faint);
}
.specstrip__inner span { display: inline-flex; align-items: center; gap: var(--space-2); }
.specstrip__inner span::before { content: ''; width: 4px; height: 4px; background: var(--color-primary); border-radius: 50%; }

/* ==========================================================================
   Numbered items
   ========================================================================== */

.numlist { counter-reset: n; }
.numitem { counter-increment: n; border-top: 1px solid var(--color-divider); padding-top: var(--space-5); }
.numitem::before {
  content: '0' counter(n);
  font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: 0.1em;
  color: var(--color-accent-text); display: block; margin-bottom: var(--space-3);
}

/* ==========================================================================
   Ledger panel (proof point)
   ========================================================================== */

.ledger {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-md);
}
.ledger__head {
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-4);
  padding: var(--space-4) var(--space-5); border-bottom: 1px solid var(--color-border);
  background: var(--color-surface-2);
}
.ledger__title { font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: 0.12em; text-transform: uppercase; color: var(--color-text-muted); }
.ledger__rows { padding: var(--space-2) var(--space-5) var(--space-5); }
.lrow { display: flex; align-items: baseline; justify-content: space-between; gap: var(--space-4); padding: var(--space-3) 0; border-bottom: 1px solid var(--color-divider); }
.lrow:last-child { border-bottom: 0; }
.lrow__label { font-size: var(--text-sm); color: var(--color-text-muted); }
.lrow__val { font-family: var(--font-mono); font-variant-numeric: tabular-nums; font-size: var(--text-base); font-weight: 500; }
.lrow--total { border-top: 1px solid var(--color-border-strong); margin-top: var(--space-2); padding-top: var(--space-4); }
.lrow--total .lrow__label { color: var(--color-text); font-weight: 700; font-size: var(--text-base); }
.lrow--total .lrow__val { font-size: var(--text-lg); font-weight: 700; color: var(--color-accent-text); }
.lrow__note { display: block; font-family: var(--font-body); font-size: var(--text-xs); color: var(--color-text-faint); letter-spacing: 0; margin-top: 2px; text-align: right; }

.bar { height: 6px; background: var(--color-surface-offset); border-radius: var(--radius-full); overflow: hidden; margin-top: var(--space-2); }
.bar__fill { height: 100%; border-radius: var(--radius-full); }

/* ==========================================================================
   Full-bleed quote band
   ========================================================================== */

.band { position: relative; isolation: isolate; overflow: hidden; }
.band__media { position: absolute; inset: 0; z-index: -2; }
.band__media img { width: 100%; height: 100%; object-fit: cover; }
.band__media::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(8, 9, 12, 0.92) 0%, rgba(8, 9, 12, 0.72) 55%, rgba(8, 9, 12, 0.45) 100%);
}
.band__inner { max-width: var(--content-wide); margin-inline: auto; padding: clamp(var(--space-16), 9vw, var(--space-24)) var(--space-6); }
.band blockquote { max-width: 30ch; }
.band .quote {
  font-family: var(--font-display); font-size: var(--text-xl); font-weight: 700;
  letter-spacing: -0.012em; color: #f2f3f6; line-height: 1.2;
}
.band cite { display: block; margin-top: var(--space-5); font-style: normal; font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: 0.12em; text-transform: uppercase; color: rgba(242, 243, 246, 0.6); }

/* ==========================================================================
   Module cards
   ========================================================================== */

.mod { display: flex; flex-direction: column; gap: var(--space-4); }
.mod__top { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--space-4); }
.mod__icon { width: 26px; height: 26px; color: var(--color-primary); flex: none; }
.mod__name { font-family: var(--font-display); font-size: var(--text-lg); font-weight: 700; letter-spacing: -0.008em; }
.mod__role { font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-text-faint); margin-top: 2px; }
.mod__desc { font-size: var(--text-sm); color: var(--color-text-muted); }
.mod__tags { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: auto; padding-top: var(--space-2); }

/* Compact module row */
.modrow {
  display: grid; grid-template-columns: 190px minmax(0, 1fr); gap: var(--space-5);
  padding: var(--space-5) 0; border-top: 1px solid var(--color-divider); align-items: start;
}
.modrow__name { font-family: var(--font-display); font-weight: 700; font-size: var(--text-base); letter-spacing: 0.01em; }
.modrow__role { font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: 0.08em; text-transform: uppercase; color: var(--color-text-faint); margin-top: 2px; }
@media (max-width: 700px) { .modrow { grid-template-columns: minmax(0, 1fr); gap: var(--space-2); } }

/* ==========================================================================
   Link flow diagram
   ========================================================================== */

.flow { display: grid; gap: var(--space-4); }
.flowrow {
  display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center; gap: var(--space-4);
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--space-4) var(--space-5);
}
.flownode { min-width: 0; }
.flownode__app { font-family: var(--font-display); font-weight: 700; font-size: var(--text-sm); letter-spacing: 0.02em; }
.flownode__what { font-size: var(--text-sm); color: var(--color-text-muted); }
.flowarrow { display: grid; place-items: center; gap: 4px; color: var(--color-primary); flex: none; }
.flowarrow__doc { font-family: var(--font-mono); font-size: 0.6875rem; letter-spacing: 0.05em; color: var(--color-text-faint); white-space: nowrap; }
@media (max-width: 760px) {
  .flowrow { grid-template-columns: minmax(0, 1fr); }
  .flowarrow { justify-items: start; }
  .flowarrow svg { transform: rotate(90deg); }
}

/* ==========================================================================
   Stats
   ========================================================================== */

.stat { border-top: 1px solid var(--color-border); padding-top: var(--space-4); }
.stat__num { font-family: var(--font-display); font-size: var(--text-xl); font-weight: 800; letter-spacing: -0.02em; line-height: 1; }
.stat__label { font-size: var(--text-sm); color: var(--color-text-muted); margin-top: var(--space-2); }

/* ==========================================================================
   Figure / screenshot frame
   ========================================================================== */

.figframe { border: 1px solid var(--color-border); border-radius: var(--radius-lg); overflow: hidden; background: var(--color-surface); }
.figframe img { width: 100%; }
.figframe figcaption { padding: var(--space-3) var(--space-4); border-top: 1px solid var(--color-border); font-size: var(--text-xs); color: var(--color-text-faint); font-family: var(--font-mono); letter-spacing: 0.04em; }

/* ==========================================================================
   Callout
   ========================================================================== */

.callout {
  border-left: 2px solid var(--color-primary);
  background: color-mix(in oklab, var(--color-primary) 7%, var(--color-surface));
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: var(--space-5) var(--space-6);
}
.callout--neutral { border-left-color: var(--color-border-strong); background: var(--color-surface); }

/* ==========================================================================
   Form
   ========================================================================== */

.form { display: grid; gap: var(--space-5); }
.field { display: grid; gap: var(--space-2); }
.field label { font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-text-muted); }
.field .req { color: var(--color-accent-text); }
.field input, .field select, .field textarea {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: 0.7rem 0.85rem; font-size: var(--text-sm); width: 100%;
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--color-primary); outline: none; box-shadow: 0 0 0 3px color-mix(in oklab, var(--color-primary) 22%, transparent); }
.field textarea { resize: vertical; min-height: 120px; }
.field__hint { font-size: var(--text-xs); color: var(--color-text-faint); }
.form__row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-5); }
@media (max-width: 620px) { .form__row { grid-template-columns: minmax(0, 1fr); } }
.form__status { font-size: var(--text-sm); color: var(--color-good); min-height: 1.5em; }
.form__status[data-state="ok"] { color: var(--color-good); }
.form__status[data-state="error"] { color: #ff9a8f; }
.form__status[data-state="busy"] { color: var(--color-text-muted); }

/* ==========================================================================
   CTA block
   ========================================================================== */

.cta {
  border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  background: var(--color-surface); padding: clamp(var(--space-8), 5vw, var(--space-16));
  display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: var(--space-8); align-items: center;
  position: relative; overflow: hidden;
}
.cta::after {
  content: ''; position: absolute; right: -60px; top: -60px; width: 260px; height: 260px;
  background: radial-gradient(circle, color-mix(in oklab, var(--color-primary) 16%, transparent), transparent 70%);
  pointer-events: none;
}
@media (max-width: 820px) { .cta { grid-template-columns: minmax(0, 1fr); } }

/* ==========================================================================
   Footer
   ========================================================================== */

.footer { border-top: 1px solid #252a34; background: #0e1015; padding-block: var(--space-16) var(--space-8); }
.footer__grid { display: grid; grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 1fr)); gap: var(--space-8); }
@media (max-width: 880px) { .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 520px) { .footer__grid { grid-template-columns: minmax(0, 1fr); } }
.footer h3 { font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: 0.12em; text-transform: uppercase; color: var(--color-text-faint); margin-bottom: var(--space-4); font-weight: 500; }
.footer ul { list-style: none; display: grid; gap: var(--space-2); }
.footer ul a { font-size: var(--text-sm); color: var(--color-text-muted); text-decoration: none; }
.footer ul a:hover { color: var(--color-text); }
.footer__tag { font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: 0.16em; text-transform: uppercase; color: var(--color-text-faint); margin-top: var(--space-4); }
.footer__base {
  margin-top: var(--space-16); padding-top: var(--space-5); border-top: 1px solid var(--color-divider);
  display: flex; flex-wrap: wrap; gap: var(--space-4); justify-content: space-between; align-items: center;
  font-size: var(--text-xs); color: var(--color-text-faint);
}

/* ==========================================================================
   Reveal on scroll
   ========================================================================== */

.reveal { opacity: 0; transform: translateY(14px); transition: opacity 620ms cubic-bezier(0.16, 1, 0.3, 1), transform 620ms cubic-bezier(0.16, 1, 0.3, 1); }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } }

/* Page header (interior pages) */
.pagehead { padding-block: clamp(var(--space-16), 8vw, var(--space-24)) clamp(var(--space-8), 4vw, var(--space-12)); position: relative; }
.pagehead .h-1 { max-width: 24ch; }

/* ============================================================
   CHAIN — the field-quantity → payment custody diagram
   ============================================================ */
.chain{
  --chain-gap: var(--space-4);
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:var(--chain-gap);
  margin-top:var(--space-10);
  counter-reset:chainstep;
}
.chain__node{
  position:relative;
  counter-increment:chainstep;
  background:var(--color-surface);
  border:1px solid var(--color-border);
  border-radius:var(--radius-md);
  padding:var(--space-6) var(--space-5) var(--space-5);
  display:flex;flex-direction:column;gap:var(--space-3);
}
/* connector between nodes */
.chain__node::after{
  content:'';position:absolute;z-index:1;
  top:50%;right:calc(-1 * var(--chain-gap) - 1px);
  width:var(--chain-gap);height:1px;
  background:var(--color-border-strong);
}
.chain__node:last-child::after{display:none}
.chain__node::before{
  content:counter(chainstep,decimal-leading-zero);
  font-family:var(--font-mono);font-size:var(--text-xs);
  letter-spacing:.16em;color:var(--color-primary);
}
.chain__node h3{
  font-family:var(--font-display);font-weight:700;
  font-size:var(--text-lg);line-height:1.2;
  letter-spacing:-.01em;color:var(--color-text);margin:0;
}
.chain__node p{
  font-size:var(--text-sm);line-height:1.55;
  color:var(--color-text-muted);margin:0;
}
.chain__proof{
  margin-top:auto;padding-top:var(--space-4);
  border-top:1px dashed var(--color-border);
  font-family:var(--font-mono);font-size:var(--text-xs);
  letter-spacing:.1em;text-transform:uppercase;
  color:var(--color-text-subtle);
}
/* the gate: last hand-off is the one that releases money */
.chain__node--gate{
  border-color:var(--color-primary);
  box-shadow:0 0 0 1px var(--color-primary) inset;
}
.chain__node--gate::before{content:'04 — gate';letter-spacing:.12em}
.chain__node--gate .chain__proof{
  color:var(--color-accent-text);
  border-top-color:color-mix(in srgb,var(--color-primary) 45%,transparent);
}
.chain__rule{
  margin-top:var(--space-6);
  max-width:78ch;
  font-size:var(--text-sm);line-height:1.6;
  color:var(--color-text-muted);
}
.chain__rule strong{color:var(--color-text);font-weight:600}

@media (max-width:1000px){
  .chain{grid-template-columns:repeat(2,1fr)}
  /* horizontal connector only between columns 1→2 and 3→4 */
  .chain__node:nth-child(2n)::after{display:none}
}
@media (max-width:600px){
  .chain{grid-template-columns:1fr}
  .chain__node::after{
    top:auto;bottom:calc(-1 * var(--chain-gap) - 1px);
    right:auto;left:var(--space-8);
    width:1px;height:var(--chain-gap);
  }
  .chain__node:nth-child(2n)::after{display:block}
  .chain__node:last-child::after{display:none}
}