/* ==========================================================================
   OpsChisel marketing site - bespoke design system.
   No frameworks. Design tokens live here as CSS custom properties.
   Dark is the default theme; [data-theme="light"] overrides it.
   ========================================================================== */

/* ---------- 1. Design tokens ---------- */

:root {
  /* Brand accents (shared across themes). Deliberately a NARROW blue->indigo
     family: the previous teal->sky->violet span read as a consumer rainbow;
     a single cool family keeps the luminosity (gradient text stays readable
     on dark) while signalling enterprise restraint. */
  --oc-accent-a: #60a5fa;               /* blue  */
  --oc-accent-b: #709af9;               /* blue-indigo */
  --oc-accent-c: #818cf8;               /* indigo */
  --oc-gradient: linear-gradient(100deg, var(--oc-accent-a), var(--oc-accent-b) 50%, var(--oc-accent-c));

  /* Dark theme (default) */
  --oc-bg-0: #070a12;                   /* page */
  --oc-bg-1: #0c111d;                   /* raised strip */
  --oc-bg-2: #111827;                   /* card */
  --oc-bg-3: #1a2336;                   /* hover / inset */
  --oc-border: rgba(148, 163, 199, 0.16);
  --oc-border-strong: rgba(148, 163, 199, 0.30);
  --oc-text-1: #eef2fa;
  --oc-text-2: #a8b3c9;
  --oc-text-3: #8791ab;
  --oc-link: #8ab6fc;
  --oc-on-accent: #0b1b3a;              /* text on gradient buttons */
  --oc-good: #34d399;
  --oc-warn: #fbbf24;
  --oc-bad: #f87171;
  --oc-glow-opacity: 0.3;
  --oc-header-bg: rgba(7, 10, 18, 0.78);
  --oc-shadow-card: 0 1px 2px rgba(0, 0, 0, 0.4), 0 12px 32px -16px rgba(0, 0, 0, 0.5);
  --oc-shadow-pop: 0 24px 64px -24px rgba(96, 165, 250, 0.22);

  /* Type */
  --oc-font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --oc-font-mono: ui-monospace, "Cascadia Code", "Segoe UI Mono", Menlo, Consolas, monospace;
  --oc-text-display: clamp(2.4rem, 1.4rem + 4.4vw, 4.2rem);
  --oc-text-h1: clamp(2rem, 1.3rem + 3vw, 3.2rem);
  --oc-text-h2: clamp(1.6rem, 1.25rem + 1.6vw, 2.25rem);
  --oc-text-h3: 1.25rem;
  --oc-text-lead: clamp(1.05rem, 1rem + 0.4vw, 1.25rem);
  --oc-text-body: 1rem;
  --oc-text-small: 0.875rem;

  /* Rhythm */
  --oc-radius-s: 8px;
  --oc-radius-m: 14px;
  --oc-radius-l: 22px;
  --oc-container: 72rem;
  --oc-section-pad: clamp(4rem, 3rem + 4vw, 7.5rem);
  --oc-header-h: 4.25rem;

  color-scheme: dark;
}

:root[data-theme="light"] {
  --oc-bg-0: #ffffff;
  --oc-bg-1: #f4f7fb;
  --oc-bg-2: #ffffff;
  --oc-bg-3: #eaeff7;
  --oc-border: rgba(15, 23, 42, 0.12);
  --oc-border-strong: rgba(15, 23, 42, 0.26);
  --oc-text-1: #0e1526;
  --oc-text-2: #43506a;
  --oc-text-3: #5f6c87;
  --oc-link: #1d4ed8;
  --oc-good: #047857;
  --oc-warn: #a16207;
  --oc-bad: #b91c1c;
  --oc-glow-opacity: 0.12;
  --oc-header-bg: rgba(255, 255, 255, 0.82);
  --oc-shadow-card: 0 1px 2px rgba(15, 23, 42, 0.06), 0 12px 32px -16px rgba(15, 23, 42, 0.14);
  --oc-shadow-pop: 0 24px 64px -28px rgba(37, 99, 235, 0.28);

  color-scheme: light;
}

/* ---------- 2. Base ---------- */

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--oc-header-h) + 1rem);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--oc-bg-0);
  color: var(--oc-text-1);
  font-family: var(--oc-font);
  font-size: var(--oc-text-body);
  line-height: 1.65;
  overflow-x: hidden; /* the page body must never scroll horizontally */
}

img, svg { max-width: 100%; height: auto; }

h1, h2, h3, h4 {
  margin: 0 0 0.6em;
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 700;
  text-wrap: balance;
}

h1 { font-size: var(--oc-text-h1); }
h2 { font-size: var(--oc-text-h2); }
h3 { font-size: var(--oc-text-h3); letter-spacing: -0.01em; }

h1:focus { outline: none; }

p { margin: 0 0 1em; }

a { color: var(--oc-link); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

:focus-visible {
  outline: 2px solid var(--oc-accent-b);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection { background: rgba(96, 165, 250, 0.35); }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0; border: 0;
  clip-path: inset(50%);
  overflow: hidden;
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: 1rem; top: -3.5rem;
  z-index: 100;
  padding: 0.6rem 1rem;
  background: var(--oc-bg-2);
  border: 1px solid var(--oc-border-strong);
  border-radius: var(--oc-radius-s);
  transition: top 0.15s ease;
}
.skip-link:focus { top: 1rem; }

/* ---------- 3. Layout primitives ---------- */

.container {
  width: 100%;
  max-width: var(--oc-container);
  margin-inline: auto;
  padding-inline: clamp(1.1rem, 4vw, 2rem);
}

.section { padding-block: var(--oc-section-pad); }
.section--tint { background: var(--oc-bg-1); border-block: 1px solid var(--oc-border); }

.section-head { max-width: 46rem; margin-bottom: clamp(2rem, 4vw, 3.5rem); }
.section-head--center { margin-inline: auto; text-align: center; }

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: transparent;
  background: var(--oc-gradient);
  -webkit-background-clip: text;
  background-clip: text;
}

.lead { font-size: var(--oc-text-lead); color: var(--oc-text-2); }

.grid { display: grid; gap: 1.25rem; }
@media (min-width: 720px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 980px) {
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* ---------- 4. Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.72rem 1.4rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font: 600 0.95rem/1.2 var(--oc-font);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

/* The primary call to action is a filled pill in the page's own surface colour -
   darker than the page, lighter than the header - with a thin border and no
   gradient or glow (2026-10-12: the gradient read as shouting on every page).
   It still stands out from the ghost button beside it by being filled; the
   hover turns it blue. */
.btn--primary {
  background: var(--oc-bg-3);
  color: var(--oc-text-1);
  border-color: var(--oc-border-strong);
  box-shadow: none;
}
.btn--primary:hover {
  background: var(--oc-bg-2);
  border-color: var(--oc-link);
  color: var(--oc-link);
  text-decoration: none;
}

.btn--ghost {
  background: transparent;
  color: var(--oc-text-1);
  border-color: var(--oc-border-strong);
}
.btn--ghost:hover { background: var(--oc-bg-3); }

.btn--lg { padding: 0.75rem 1.5rem; font-size: 1rem; }

/* ---------- 5. Header & navigation ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--oc-header-h);
  background: var(--oc-header-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--oc-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  height: 100%;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  flex: none;             /* the header row never squeezes the name onto several lines */
  white-space: nowrap;
  font-weight: 700;
  font-size: 1.08rem;
  letter-spacing: -0.01em;
  color: var(--oc-text-1);
}
.logo:hover { text-decoration: none; }
.logo svg { flex: none; }
.logo__product {
  color: var(--oc-text-3);
  font-weight: 500;
  font-size: 0.85rem;
  border-left: 1px solid var(--oc-border-strong);
  padding-left: 0.6rem;
}

@media (max-width: 1279px) {
  .logo__product { display: none; }
}

.site-nav { margin-left: auto; }
.site-nav ul {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.site-nav a {
  display: inline-block;
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  color: var(--oc-text-2);
  font-weight: 500;
  font-size: 0.95rem;
  white-space: nowrap;
}
.site-nav a:hover { color: var(--oc-text-1); background: var(--oc-bg-3); text-decoration: none; }
.site-nav a[aria-current="page"] { color: var(--oc-text-1); background: var(--oc-bg-3); }

.header-actions { display: flex; align-items: center; gap: 0.6rem; margin-left: auto; }
.site-nav + .header-actions { margin-left: 0; }

/* The header CTA is the quiet one: a compact, darker pill that sits with the
   header chrome instead of a gradient shouting from every page. The page
   CTAs (hero, band) keep the gradient and the full sentence. */
.header-cta {
  padding: 0.5rem 1rem;
  font-size: 0.88rem;
  white-space: nowrap;
  background: var(--oc-bg-3);
  color: var(--oc-text-1);
  border-color: var(--oc-border-strong);
  box-shadow: none;
}
.header-cta:hover {
  background: var(--oc-bg-2);
  border-color: var(--oc-link);
  color: var(--oc-link);
  text-decoration: none;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.4rem; height: 2.4rem;
  border-radius: 999px;
  border: 1px solid var(--oc-border);
  background: transparent;
  color: var(--oc-text-2);
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
}
.icon-btn:hover { background: var(--oc-bg-3); color: var(--oc-text-1); }

/* Theme toggle shows the icon of the theme you would switch TO */
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
:root[data-theme="light"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="light"] .theme-toggle .icon-moon { display: none; }

.nav-toggle { display: none; }
.nav-toggle .icon-close { display: none; }

@media (max-width: 1099px) {
  .nav-toggle { display: inline-flex; }

  /* the nav is position:fixed here, so it no longer pushes the actions right */
  .site-nav + .header-actions { margin-left: auto; }

  .site-nav {
    position: fixed;
    inset: var(--oc-header-h) 0 auto 0;
    margin: 0;
    padding: 0.75rem 1.1rem 1.25rem;
    background: var(--oc-header-bg);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--oc-border);
    box-shadow: var(--oc-shadow-card);
    display: none;
  }
  .site-nav ul { flex-direction: column; align-items: stretch; gap: 0.15rem; }
  .site-nav a { display: block; padding: 0.8rem 1rem; font-size: 1.05rem; border-radius: var(--oc-radius-s); }

  .nav-open .site-nav { display: block; }
  .nav-open .nav-toggle .icon-menu { display: none; }
  .nav-open .nav-toggle .icon-close { display: block; }

  .header-cta { display: none; }
}

/* ---------- 6. Hero ---------- */

.hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(4.5rem, 4rem + 6vw, 8.5rem) clamp(3.5rem, 3rem + 4vw, 6rem);
}

.hero__backdrop {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}
.hero__backdrop::before {
  /* faint blueprint grid */
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--oc-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--oc-border) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, black 30%, transparent 75%);
}
.hero__backdrop::after {
  /* gradient glow */
  content: "";
  position: absolute;
  top: -30%;
  left: 50%;
  translate: -50% 0;
  width: min(70rem, 120vw);
  aspect-ratio: 2 / 1;
  background: radial-gradient(ellipse closest-side, rgba(96, 165, 250, 0.24), rgba(129, 140, 248, 0.12) 55%, transparent 75%);
  opacity: var(--oc-glow-opacity);
  filter: blur(20px);
}

.hero__inner { max-width: 52rem; margin-inline: auto; text-align: center; }

.hero h1 {
  font-size: var(--oc-text-display);
  margin-bottom: 0.5em;
}

.grad {
  background: var(--oc-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero .lead { margin-inline: auto; max-width: 40rem; }

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.9rem;
  margin-top: 2.2rem;
}

.hero__note {
  margin-top: 1.1rem;
  font-size: var(--oc-text-small);
  color: var(--oc-text-3);
}

.hero__visual { margin-top: clamp(2.5rem, 2rem + 3vw, 4.5rem); }

/* Announcement pill above the hero headline */
.pill {
  display: inline-flex;
  flex-wrap: wrap;
  justify-content: center;
  text-align: center;
  max-width: 100%;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.9rem;
  margin-bottom: 1.6rem;
  border: 1px solid var(--oc-border-strong);
  border-radius: 999px;
  background: var(--oc-bg-2);
  font-size: 0.85rem;
  color: var(--oc-text-2);
}
.pill strong { color: var(--oc-text-1); font-weight: 600; }

/* ---------- 6b. Changelog ---------- */

.changelog {
  list-style: none;
  padding: 0;
  margin: 0 0 2.75rem;
  display: grid;
  gap: 0.9rem;
}
.changelog__item {
  border: 1px solid var(--oc-border);
  border-radius: var(--oc-radius-m);
  background: var(--oc-bg-2);
  padding: 1.15rem 1.4rem;
}
.changelog__meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.45rem;
  font-size: var(--oc-text-small);
}
.changelog__tag {
  display: inline-flex;
  align-items: center;
  padding: 0.1rem 0.65rem;
  border: 1px solid var(--oc-border-strong);
  border-radius: 999px;
  font-size: 0.75rem;
  color: var(--oc-text-2);
  background: var(--oc-bg-3);
}
.changelog__pr { color: var(--oc-text-3); font-family: var(--oc-font-mono); font-size: 0.78rem; }
.changelog__item h3 { margin: 0 0 0.3rem; font-size: 1.02rem; }
.changelog__item p { margin: 0; color: var(--oc-text-2); font-size: 0.95rem; }

/* ---------- 7. Cards & feature grid ---------- */

.card {
  position: relative;
  padding: 1.6rem;
  border: 1px solid var(--oc-border);
  border-radius: var(--oc-radius-m);
  background: var(--oc-bg-2);
  box-shadow: var(--oc-shadow-card);
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.card:hover { transform: translateY(-3px); border-color: var(--oc-border-strong); }

.card h3 { margin-top: 1rem; }
.card p { margin-bottom: 0; color: var(--oc-text-2); }

.card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem; height: 2.75rem;
  border-radius: var(--oc-radius-s);
  border: 1.5px solid transparent;
  background:
    linear-gradient(var(--oc-bg-2), var(--oc-bg-2)) padding-box,
    var(--oc-gradient) border-box;
  color: var(--oc-accent-b);
}

.card--link { display: block; color: inherit; }
.card--link:hover { text-decoration: none; }

/* ---------- 8. "How it works" steps ---------- */

.steps { counter-reset: step; }
.step { position: relative; padding-top: 0.5rem; }
.step::before {
  counter-increment: step;
  content: "0" counter(step);
  display: block;
  font: 700 2.4rem/1 var(--oc-font-mono);
  letter-spacing: -0.04em;
  background: var(--oc-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 0.75rem;
}
.step h3 { margin-bottom: 0.4rem; }
.step p { color: var(--oc-text-2); margin-bottom: 0; }

/* ---------- 9. Figure / diagram placeholders ---------- */

.figure {
  margin: 0;
  border: 1px dashed var(--oc-border-strong);
  border-radius: var(--oc-radius-l);
  background:
    radial-gradient(ellipse 80% 90% at 50% 0%, rgba(96, 165, 250, 0.05), transparent 70%),
    var(--oc-bg-1);
  overflow: hidden;
}
.figure__frame {
  display: grid;
  place-items: center;
  padding: 1rem;
}
.figure__hint {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--oc-border);
  background: var(--oc-bg-2);
  color: var(--oc-text-3);
  font-size: var(--oc-text-small);
  text-align: center;
}
.figure figcaption {
  padding: 0.8rem 1.2rem;
  border-top: 1px solid var(--oc-border);
  color: var(--oc-text-3);
  font-size: var(--oc-text-small);
}

.figure--filled {
  border-style: solid;
  border-color: var(--oc-border);
  background: var(--oc-bg-1);
}
.figure--filled .figure__frame {
  padding: 0;
}
.figure__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Inline SVG diagrams: theme-aware through the same tokens as everything else. */
.figure--diagram .figure__frame {
  padding: 0;
}
.dgm {
  width: 100%;
  height: 100%;
  display: block;
  font-family: var(--oc-font);
}
.dgm-zone {
  fill: var(--oc-bg-1);
  stroke: var(--oc-border);
  stroke-dasharray: 6 5;
}
.dgm-node {
  fill: var(--oc-bg-2);
  stroke: var(--oc-border-strong);
}
.dgm-node--accent {
  fill: var(--oc-bg-3);
  stroke: var(--oc-accent-b);
  stroke-width: 1.6;
}
.dgm-node--muted {
  fill: var(--oc-bg-1);
  stroke: var(--oc-border);
  stroke-dasharray: 4 4;
}
.dgm-title { fill: var(--oc-text-1); font-size: 15px; font-weight: 650; }
.dgm-label { fill: var(--oc-text-2); font-size: 13px; }
.dgm-small { fill: var(--oc-text-3); font-size: 11.5px; }
.dgm-mono  { fill: var(--oc-text-3); font-size: 11px; font-family: var(--oc-font-mono); }
.dgm-line        { stroke: var(--oc-text-3); stroke-width: 1.6; fill: none; }
.dgm-line--accent { stroke: var(--oc-accent-b); stroke-width: 2; fill: none; }
.dgm-line--good   { stroke: var(--oc-good); stroke-width: 2; fill: none; }
.dgm-line--muted  { stroke: var(--oc-border-strong); stroke-width: 1.4; fill: none; stroke-dasharray: 5 5; }
.dgm-arrow        { fill: var(--oc-text-3); }
.dgm-arrow--accent { fill: var(--oc-accent-b); }
.dgm-arrow--good   { fill: var(--oc-good); }
.dgm-dot--good { fill: var(--oc-good); }
.dgm-dot--warn { fill: var(--oc-warn); }
.dgm-dot--bad  { fill: var(--oc-bad); }
.dgm-dot--info { fill: var(--oc-accent-b); }
.dgm-bad-stroke { stroke: var(--oc-bad); stroke-width: 2.4; stroke-linecap: round; fill: none; }
.dgm-lane-a { stroke: var(--oc-accent-a); }
.dgm-lane-b { stroke: var(--oc-accent-b); }
.dgm-lane-c { stroke: var(--oc-accent-c); }
.dgm-lane-a-fill { fill: var(--oc-accent-a); }
.dgm-lane-b-fill { fill: var(--oc-accent-b); }
.dgm-lane-c-fill { fill: var(--oc-accent-c); }

/* ---------- 10. Compare table ---------- */
.table-scroll {
  position: relative; /* anchors absolutely-positioned .visually-hidden children so they can't widen the page */
  overflow-x: auto;
  border: 1px solid var(--oc-border);
  border-radius: var(--oc-radius-m);
  background: var(--oc-bg-2);
  box-shadow: var(--oc-shadow-card);
}

.compare-table {
  width: 100%;
  min-width: 42rem;
  border-collapse: collapse;
  font-size: 0.95rem;
}
.compare-table th, .compare-table td {
  padding: 0.9rem 1.1rem;
  border-top: 1px solid var(--oc-border);
  text-align: left;
  vertical-align: top;
}
.compare-table thead th {
  border-top: 0;
  background: var(--oc-bg-1);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--oc-text-2);
  white-space: nowrap;
}
.compare-table thead th.us { color: var(--oc-text-1); }
.compare-table td.mark-cell { white-space: nowrap; }
.compare-table .note { display: block; color: var(--oc-text-3); font-size: 0.82rem; margin-top: 0.15rem; white-space: normal; }

/* Plan matrix extras (pricing page) */
.plan-table { min-width: 52rem; }
.plan-table td, .plan-table th { font-size: 0.9rem; }
.plan-table tr.cat th {
  background: var(--oc-bg-1);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--oc-text-3);
  padding-block: 0.6rem;
}
.mark-dash { color: var(--oc-text-3); }

.mark {
  display: inline-grid;
  place-items: center;
  width: 1.5rem; height: 1.5rem;
  border-radius: 999px;
  font: 700 0.9rem/1 var(--oc-font-mono);
}
.mark--full { color: var(--oc-good); background: color-mix(in srgb, var(--oc-good) 14%, transparent); }
.mark--partial { color: var(--oc-warn); background: color-mix(in srgb, var(--oc-warn) 14%, transparent); }
.mark--none { color: var(--oc-bad); background: color-mix(in srgb, var(--oc-bad) 12%, transparent); }

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
  margin-top: 1rem;
  color: var(--oc-text-3);
  font-size: var(--oc-text-small);
}
.legend span { display: inline-flex; align-items: center; gap: 0.45rem; }

/* ---------- 11. Pricing ---------- */

.tier {
  display: flex;
  flex-direction: column;
  padding: 1.8rem 1.6rem;
  border: 1px solid var(--oc-border);
  border-radius: var(--oc-radius-m);
  background: var(--oc-bg-2);
  box-shadow: var(--oc-shadow-card);
}
.tier--highlight {
  border: 1.5px solid transparent;
  background:
    linear-gradient(var(--oc-bg-2), var(--oc-bg-2)) padding-box,
    var(--oc-gradient) border-box;
  box-shadow: var(--oc-shadow-pop);
}
.tier__badge {
  align-self: flex-start;
  margin-bottom: 0.8rem;
  padding: 0.2rem 0.7rem;
  border-radius: 999px;
  background: var(--oc-gradient);
  color: var(--oc-on-accent);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.tier h3 { margin-bottom: 0.2rem; }
.tier__price { font-size: 2.1rem; font-weight: 700; letter-spacing: -0.02em; }
.tier__price-detail { color: var(--oc-text-3); font-size: var(--oc-text-small); margin-bottom: 1rem; }
.tier__blurb { color: var(--oc-text-2); font-size: 0.95rem; }
.tier ul {
  margin: 1.1rem 0 1.4rem;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.55rem;
  color: var(--oc-text-2);
  font-size: 0.92rem;
}
.tier li { display: flex; gap: 0.6rem; align-items: baseline; }
.tier li svg { flex: none; translate: 0 3px; color: var(--oc-accent-b); }
.tier .btn { margin-top: auto; }

/* ---------- 12. Feature rows (platform page) ---------- */

.feature-row {
  display: grid;
  gap: 2rem;
  align-items: center;
  padding-block: clamp(2.5rem, 2rem + 3vw, 4.5rem);
}
.feature-row + .feature-row { border-top: 1px solid var(--oc-border); }
@media (min-width: 900px) {
  .feature-row { grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: clamp(2rem, 4vw, 4.5rem); }
  .feature-row--flip > .feature-row__copy { order: 2; }
}
.feature-row__copy .card__icon { margin-bottom: 1.1rem; }
.feature-row__copy p { color: var(--oc-text-2); }
.feature-row__copy ul { color: var(--oc-text-2); padding-left: 1.2rem; margin: 0.8rem 0 0; display: grid; gap: 0.4rem; }

.chapter-nav { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.chapter-nav a {
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--oc-border);
  border-radius: 999px;
  background: var(--oc-bg-2);
  color: var(--oc-text-2);
  font-size: 0.88rem;
}
.chapter-nav a:hover { color: var(--oc-text-1); border-color: var(--oc-border-strong); text-decoration: none; }

/* ---------- 13. CTA band ---------- */

.cta-band {
  position: relative;
  overflow: hidden;
  text-align: center;
  padding: clamp(3rem, 2.5rem + 3vw, 5rem) 1.5rem;
  border: 1px solid var(--oc-border);
  border-radius: var(--oc-radius-l);
  background:
    radial-gradient(ellipse 70% 120% at 50% -20%, rgba(96, 165, 250, 0.12), transparent 70%),
    var(--oc-bg-1);
}
.cta-band h2 { margin-bottom: 0.4em; }
.cta-band p { color: var(--oc-text-2); max-width: 36rem; margin-inline: auto; }
.cta-band .hero__actions { margin-top: 1.8rem; }

/* ---------- 14. Quote / social proof ---------- */

.quote { max-width: 44rem; margin-inline: auto; text-align: center; }
.quote blockquote {
  margin: 0;
  font-size: clamp(1.15rem, 1rem + 1vw, 1.5rem);
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: -0.01em;
}
.quote figcaption { margin-top: 1.2rem; color: var(--oc-text-3); font-size: var(--oc-text-small); }

.logo-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem 1.5rem;
  margin-top: 2.5rem;
  color: var(--oc-text-3);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.8rem;
}
.logo-row span {
  padding: 0.45rem 1.1rem;
  border: 1px dashed var(--oc-border);
  border-radius: var(--oc-radius-s);
}

/* ---------- 15. Forms (About / contact) ---------- */

.form-grid { display: grid; gap: 1.1rem; max-width: 34rem; }
.field { display: grid; gap: 0.35rem; }
.field label { font-weight: 600; font-size: 0.92rem; }
.field input, .field textarea {
  width: 100%;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--oc-border-strong);
  border-radius: var(--oc-radius-s);
  background: var(--oc-bg-2);
  color: var(--oc-text-1);
  font: inherit;
}
.field input:focus-visible, .field textarea:focus-visible { outline-offset: 1px; }
.field .hint { color: var(--oc-text-3); font-size: 0.82rem; }

.notice {
  padding: 0.9rem 1.1rem;
  border: 1px solid var(--oc-border);
  border-left: 3px solid var(--oc-accent-b);
  border-radius: var(--oc-radius-s);
  background: var(--oc-bg-1);
  color: var(--oc-text-2);
  font-size: var(--oc-text-small);
}

/* ---------- 16. Footer ---------- */

.site-footer {
  border-top: 1px solid var(--oc-border);
  background: var(--oc-bg-1);
  padding-block: 3rem 2rem;
  color: var(--oc-text-2);
  font-size: var(--oc-text-small);
}
.site-footer__grid { display: grid; gap: 2rem; margin-bottom: 2.5rem; }
@media (min-width: 720px) {
  .site-footer__grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
}
.site-footer h4 {
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--oc-text-3);
  margin-bottom: 0.8rem;
}
.site-footer ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 0.45rem; }
.site-footer a { color: var(--oc-text-2); }
.site-footer a:hover { color: var(--oc-text-1); }
.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
  padding-top: 1.5rem;
  border-top: 1px solid var(--oc-border);
  color: var(--oc-text-3);
}

/* ---------- 17. On-scroll reveal ---------- */

.reveal {
  opacity: 0;
  translate: 0 18px;
  transition: opacity 0.6s ease, translate 0.6s ease;
}
.reveal.in-view { opacity: 1; translate: 0 0; }
.reveal-stagger > * { transition-delay: calc(var(--stagger-i, 0) * 70ms); }

/* No-JS and reduced-motion users see everything immediately */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; translate: none; transition: none; }
  .btn, .card { transition: none; }
}
html:not(.js) .reveal { opacity: 1; translate: none; }

/* ---------- 18. Error page (template plumbing) ---------- */

.blazor-error-boundary { display: none; }

/* Code blocks for developer-facing content (Best practices). Dark on both
   themes by convention; horizontally scrollable so it never breaks the page. */
.code-block {
  background: #0d1117;
  color: #e6edf3;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 1.05rem 1.2rem;
  margin: 1rem 0 0;
  overflow-x: auto;
  font: 500 0.84rem/1.6 var(--oc-font-mono);
  -webkit-text-size-adjust: 100%;
}
.code-block code { font: inherit; background: none; color: inherit; padding: 0; }
.code-block .cmt { color: #8b98a5; }

/* ---------- Lightbox: figures open large on click ---------- */
.figure--filled .figure__frame {
  position: relative;
  cursor: zoom-in;
}
.figure--filled .figure__frame:focus-visible {
  outline: 2px solid var(--oc-accent, #60a5fa);
  outline-offset: 2px;
}
.figure--filled .figure__frame::after {
  content: "View larger";
  position: absolute;
  right: 0.75rem;
  bottom: 0.75rem;
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
  border: 1px solid var(--oc-border);
  background: var(--oc-bg-2);
  color: var(--oc-text-2);
  font-size: var(--oc-text-small);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 160ms ease, transform 160ms ease;
  pointer-events: none;
}
.figure--filled .figure__frame:hover::after,
.figure--filled .figure__frame:focus-visible::after {
  opacity: 1;
  transform: none;
}
@media (hover: none) {
  .figure--filled .figure__frame::after { opacity: 1; transform: none; }
}

.lightbox {
  border: 1px solid var(--oc-border);
  border-radius: var(--oc-radius-l);
  background: var(--oc-bg-1);
  color: var(--oc-text-1);
  padding: 0;
  width: min(96vw, 1800px);
  max-width: none;
  max-height: 94vh;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55);
}
.lightbox::backdrop {
  background: rgba(2, 6, 23, 0.82);
  backdrop-filter: blur(2px);
}
.lightbox__media {
  display: grid;
  place-items: center;
  padding: 1rem;
}
.lightbox__media img,
.lightbox__media svg {
  display: block;
  width: 100%;
  height: auto;
  max-height: calc(94vh - 7rem);
  object-fit: contain;
  border-radius: var(--oc-radius-m, 8px);
}
.lightbox__caption {
  margin: 0;
  padding: 0.75rem 1.25rem 1rem;
  border-top: 1px solid var(--oc-border);
  color: var(--oc-text-3);
  font-size: var(--oc-text-small);
  text-align: center;
}
.lightbox__close {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 999px;
  border: 1px solid var(--oc-border);
  background: var(--oc-bg-2);
  color: var(--oc-text-1);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
}
.lightbox__close:hover { background: var(--oc-bg-3, var(--oc-bg-2)); }
html.lightbox-open { overflow: hidden; }