/* SPDX-License-Identifier: Apache-2.0 */
/*
 * kyvernon.com stylesheet. Colour values are the Kyvernon design-system tokens
 * (ui/design-system/tokens/tokens.json) with the brand extension documented in brand/BRAND.md.
 * Light theme by default, dark theme through prefers-color-scheme. No framework, no build step.
 */

@font-face {
  font-family: "Inter";
  src: url("/assets/fonts/inter-latin-wght-normal.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Instrument Serif";
  src: url("/assets/fonts/instrument-serif-latin-400-normal.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  color-scheme: light dark;
  --k-font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --k-font-display: "Instrument Serif", Georgia, "Times New Roman", serif;
  --k-font-mono: ui-monospace, "Cascadia Mono", "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --k-bg-canvas: #f4f5f7;
  --k-bg-surface: #ffffff;
  --k-bg-subtle: #eceef1;
  --k-bg-inverse: #1b1f26;
  --k-bg-selected: #e3ecfa;
  --k-fg: #1b1f26;
  --k-fg-muted: #4b5563;
  --k-fg-subtle: #5f6773;
  --k-fg-inverse: #f4f5f7;
  --k-fg-on-accent: #ffffff;
  --k-link: #1a4fa0;
  --k-border: #d1d5db;
  --k-border-subtle: #e5e8ec;
  --k-border-strong: #6f7988;
  --k-accent: #1f5fbf;
  --k-accent-hover: #194d9c;
  --k-accent-active: #143f80;
  --k-accent-subtle: #e3ecfa;
  --k-accent-fg: #1a4fa0;
  --k-ok: #1a7f4b;
  --k-warning: #9a5b00;
  --k-elevation-1: 0 1px 2px rgba(15, 18, 23, 0.08), 0 0 0 1px rgba(15, 18, 23, 0.04);
  --k-grid-line: rgba(15, 18, 23, 0.06);
  --k-cyan: #0891b2;
  --k-gradient: linear-gradient(110deg, #1e3a8a 0%, #2563eb 45%, #06b6d4 100%);

  --k-radius-sm: 3px;
  --k-radius-md: 6px;
  --k-radius-lg: 10px;
  --k-container: 72rem;
  --k-measure: 44rem;
  --k-gutter: 1rem;
  --k-duration: 160ms;
  --k-ease: cubic-bezier(0.2, 0, 0, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --k-bg-canvas: #0f1217;
    --k-bg-surface: #171b22;
    --k-bg-subtle: #1f242d;
    --k-bg-inverse: #f4f5f7;
    --k-bg-selected: #1c2d4a;
    --k-fg: #e6e9ee;
    --k-fg-muted: #aab2bf;
    --k-fg-subtle: #98a1af;
    --k-fg-inverse: #1b1f26;
    --k-fg-on-accent: #0f1217;
    --k-link: #8ab8f8;
    --k-border: #2e3542;
    --k-border-subtle: #262c36;
    --k-border-strong: #7d8797;
    --k-accent: #5b9cf5;
    --k-accent-hover: #78aef7;
    --k-accent-active: #3f85e8;
    --k-accent-subtle: #1c2d4a;
    --k-accent-fg: #8ab8f8;
    --k-ok: #4fc27c;
    --k-warning: #e0a33a;
    --k-elevation-1: 0 1px 2px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.05);
    --k-grid-line: rgba(244, 245, 247, 0.06);
    --k-cyan: #22d3ee;
  }
}

@media (min-width: 48rem) {
  :root { --k-gutter: 2rem; }
}

/* ------------------------------------------------------------------ base */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--k-font-sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--k-fg);
  background: var(--k-bg-canvas);
  font-feature-settings: "cv11", "ss01";
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; height: auto; }
a { color: var(--k-link); text-decoration: underline; text-underline-offset: 0.15em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--k-accent); outline-offset: 2px; border-radius: var(--k-radius-sm); }
code, pre { font-family: var(--k-font-mono); font-size: 0.9em; }
code { background: var(--k-bg-subtle); padding: 0.1em 0.35em; border-radius: var(--k-radius-sm); }
pre { background: var(--k-bg-subtle); padding: 1rem; border-radius: var(--k-radius-md); overflow: auto; line-height: 1.5; }
pre code { background: none; padding: 0; }
hr { border: 0; border-top: 1px solid var(--k-border-subtle); margin: 3rem 0; }

.container { max-width: var(--k-container); margin: 0 auto; padding: 0 var(--k-gutter); }
.skip-link { position: absolute; left: 1rem; top: -4rem; background: var(--k-accent); color: var(--k-fg-on-accent); padding: 0.5rem 1rem; border-radius: var(--k-radius-md); z-index: 200; }
.skip-link:focus { top: 1rem; }

/* ------------------------------------------------------------------ typography */
h1, h2, h3, h4 { margin: 0; font-weight: 600; line-height: 1.2; letter-spacing: -0.01em; text-wrap: balance; }
h1 { font-family: var(--k-font-display); font-weight: 400; font-size: clamp(2.25rem, 1.5rem + 3.5vw, 4rem); line-height: 1.05; letter-spacing: -0.015em; }
h2 { font-family: var(--k-font-display); font-weight: 400; font-size: clamp(1.75rem, 1.3rem + 1.6vw, 2.5rem); line-height: 1.12; margin-top: 3.5rem; margin-bottom: 1rem; }
h3 { font-size: 1.25rem; margin-top: 2.25rem; margin-bottom: 0.5rem; }
h4 { font-size: 1rem; margin-top: 1.5rem; margin-bottom: 0.25rem; }
h2 + h3 { margin-top: 1.5rem; }
p, ul, ol, blockquote, .table-wrap, pre { margin: 0 0 1.1rem; }
ul, ol { padding-left: 1.4rem; }
li { margin-bottom: 0.35rem; }
li > ul, li > ol { margin-top: 0.35rem; margin-bottom: 0; }
strong { font-weight: 600; }
blockquote { border-left: 3px solid var(--k-accent); padding: 0.25rem 0 0.25rem 1.25rem; color: var(--k-fg-muted); }
blockquote p:last-child { margin-bottom: 0; }
.eyebrow { font-size: 0.8125rem; font-weight: 500; text-transform: uppercase; letter-spacing: 0.08em; color: var(--k-accent-fg); margin: 0 0 1rem; }
.lede { font-size: clamp(1.125rem, 1rem + 0.5vw, 1.375rem); line-height: 1.5; color: var(--k-fg-muted); max-width: 40rem; margin: 1.25rem 0 0; text-wrap: pretty; }
.prose { padding-bottom: 5rem; }
.prose > p, .prose > ul, .prose > ol, .prose > blockquote, .prose > h3, .prose > h4,
.prose section > p, .prose section > ul, .prose section > ol, .prose section > h3, .prose section > h4, .prose section > blockquote { max-width: var(--k-measure); }
.prose > h2, .prose section > h2 { max-width: 36rem; }
.prose > .cards, .prose > .facts, .prose > .table-wrap, .prose > .diagram, .prose > .cta-band, .prose > .form { max-width: none; }

/* ------------------------------------------------------------------ header */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--k-bg-canvas) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--k-border-subtle);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 4rem; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: 0.625rem; text-decoration: none; color: var(--k-fg); font-weight: 600; font-size: 1.125rem; letter-spacing: -0.01em; }
.brand-mark { flex: none; overflow: visible; filter: drop-shadow(0 4px 10px rgba(37, 99, 235, 0.28)); }
.site-nav { flex: 1 1 100%; display: none; }
.site-nav.is-open { display: block; }
.nav-list { list-style: none; margin: 0; padding: 0.5rem 0 1rem; display: flex; flex-direction: column; gap: 0.25rem; }
.nav-list a { display: block; padding: 0.5rem 0.625rem; text-decoration: none; color: var(--k-fg-muted); font-weight: 500; font-size: 0.9375rem; border-radius: var(--k-radius-md); }
.nav-list a:hover { color: var(--k-fg); background: var(--k-bg-subtle); }
.nav-list a[aria-current="page"] { color: var(--k-fg); background: var(--k-accent-subtle); }
.nav-toggle {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font: inherit; font-size: 0.9375rem; font-weight: 500; color: var(--k-fg);
  background: none; border: 1px solid var(--k-border); border-radius: var(--k-radius-md); padding: 0.375rem 0.75rem; cursor: pointer;
}
.nav-toggle-bar { position: relative; display: inline-block; width: 1rem; height: 2px; background: currentColor; }
.nav-toggle-bar::before, .nav-toggle-bar::after { content: ""; position: absolute; left: 0; width: 1rem; height: 2px; background: currentColor; }
.nav-toggle-bar::before { top: -5px; }
.nav-toggle-bar::after { top: 5px; }

@media (min-width: 60rem) {
  .header-inner { flex-wrap: nowrap; }
  .nav-toggle { display: none; }
  .site-nav { display: block; flex: 0 1 auto; }
  .nav-list { flex-direction: row; padding: 0; gap: 0.125rem; }
}

/* ------------------------------------------------------------------ hero */
.hero { padding: clamp(3rem, 6vw, 6rem) 0 clamp(2rem, 4vw, 3.5rem); }
.hero h1 { max-width: 20ch; }
.hero-home {
  position: relative; isolation: isolate; overflow: hidden;
  border-bottom: 1px solid var(--k-border-subtle);
  padding-bottom: clamp(3rem, 6vw, 5rem);
}
/* Aurora glow behind the hero, drifting slowly. */
.hero-home::before {
  content: ""; position: absolute; z-index: -2; inset: -35% -15% -20% -15%;
  background:
    radial-gradient(38% 46% at 18% 28%, color-mix(in srgb, #2563eb 30%, transparent), transparent 70%),
    radial-gradient(32% 42% at 82% 18%, color-mix(in srgb, #06b6d4 26%, transparent), transparent 70%),
    radial-gradient(30% 40% at 62% 88%, color-mix(in srgb, #7c3aed 18%, transparent), transparent 70%);
  filter: blur(24px);
  animation: k-aurora 22s ease-in-out infinite alternate;
}
/* Grid that fades out towards the edges and drifts. */
.hero-home::after {
  content: ""; position: absolute; z-index: -1; inset: 0;
  background-image: linear-gradient(var(--k-grid-line) 1px, transparent 1px), linear-gradient(90deg, var(--k-grid-line) 1px, transparent 1px);
  background-size: 3rem 3rem;
  -webkit-mask-image: radial-gradient(70% 80% at 50% 40%, #000 30%, transparent 85%);
  mask-image: radial-gradient(70% 80% at 50% 40%, #000 30%, transparent 85%);
  animation: k-grid 40s linear infinite;
}
.hero-home h1 {
  background: linear-gradient(100deg, var(--k-fg) 0%, var(--k-fg) 38%, #2563eb 58%, var(--k-cyan) 72%, var(--k-fg) 92%);
  background-size: 260% 100%;
  -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: k-headline 9s ease-in-out infinite;
}
.hero-home .eyebrow { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.3rem 0.8rem 0.3rem 0.6rem; border-radius: 999px; background: color-mix(in srgb, var(--k-bg-surface) 70%, transparent); border: 1px solid var(--k-border-subtle); backdrop-filter: blur(6px); }
.hero-home .eyebrow::before { content: ""; width: 0.5rem; height: 0.5rem; border-radius: 50%; background: var(--k-cyan); animation: k-pulse 2.4s ease-out infinite; }
.hero-home h1 { max-width: 14ch; }
.hero-grid { display: grid; gap: 3rem; align-items: center; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin: 2rem 0 0; }
.hero-diagram { margin: 0; }
@media (min-width: 60rem) {
  .hero-grid { grid-template-columns: 1.05fr 1fr; gap: 4rem; }
}

/* ------------------------------------------------------------------ buttons */
.button {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  min-height: 2.75rem; padding: 0.625rem 1.25rem;
  font: inherit; font-size: 1rem; font-weight: 500; text-decoration: none; cursor: pointer;
  border-radius: var(--k-radius-md); border: 1px solid transparent;
  transition: background-color var(--k-duration) var(--k-ease), border-color var(--k-duration) var(--k-ease);
}
.button-primary { position: relative; overflow: hidden; background: var(--k-gradient); background-size: 160% 100%; background-position: 0% 0; color: #fff; box-shadow: 0 6px 20px -6px rgba(37, 99, 235, 0.55); transition: background-position 400ms var(--k-ease), box-shadow var(--k-duration) var(--k-ease), transform var(--k-duration) var(--k-ease); }
.button-primary::after { content: ""; position: absolute; inset: 0; background: linear-gradient(110deg, transparent 30%, rgba(255, 255, 255, 0.35) 50%, transparent 70%); transform: translateX(-120%); }
.button-primary:hover { background-position: 100% 0; box-shadow: 0 10px 28px -8px rgba(6, 182, 212, 0.6); transform: translateY(-1px); }
.button-primary:hover::after { transform: translateX(120%); transition: transform 700ms var(--k-ease); }
.button-primary:active { transform: translateY(0); }
.button-secondary { background: transparent; color: var(--k-fg); border-color: var(--k-border-strong); }
.button-secondary:hover { background: var(--k-bg-subtle); }
.button:hover { text-decoration: none; }

/* ------------------------------------------------------------------ content blocks */
.cards { display: grid; gap: 1rem; list-style: none; padding: 0; margin: 1.5rem 0 2.5rem; }
.card { position: relative; overflow: hidden; isolation: isolate; background: var(--k-bg-surface); border: 1px solid var(--k-border-subtle); border-radius: var(--k-radius-lg); padding: 1.25rem 1.375rem; box-shadow: var(--k-elevation-1); transition: transform 240ms var(--k-ease), box-shadow 240ms var(--k-ease), border-color 240ms var(--k-ease); }
/* Spotlight that follows the pointer (position set by site.js). */
.card::before { content: ""; position: absolute; z-index: -1; inset: 0; opacity: 0; transition: opacity 240ms var(--k-ease); background: radial-gradient(280px circle at var(--mx, 50%) var(--my, 0%), color-mix(in srgb, #2563eb 16%, transparent), color-mix(in srgb, #06b6d4 8%, transparent) 40%, transparent 70%); }
.card:hover { transform: translateY(-3px); border-color: color-mix(in srgb, #2563eb 40%, var(--k-border-subtle)); box-shadow: 0 18px 40px -18px rgba(37, 99, 235, 0.35), var(--k-elevation-1); }
.card:hover::before { opacity: 1; }
.card h3::before { content: ""; display: block; width: 2rem; height: 3px; border-radius: 3px; margin-bottom: 0.875rem; background: var(--k-gradient); transition: width 300ms var(--k-ease); }
.card:hover h3::before { width: 3.5rem; }
.card h3 { margin: 0 0 0.5rem; font-size: 1.0625rem; }
.card p { margin: 0; color: var(--k-fg-muted); font-size: 0.9375rem; }
.card p + p { margin-top: 0.5rem; }
.card a { color: var(--k-link); }
.card .card-meta { font-size: 0.8125rem; color: var(--k-fg-subtle); margin-top: 0.75rem; }
@media (min-width: 40rem) { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 64rem) { .cards { grid-template-columns: repeat(3, 1fr); } .cards-2 { grid-template-columns: repeat(2, 1fr); } .cards-4 { grid-template-columns: repeat(4, 1fr); } }

.facts { display: grid; gap: 1rem 2rem; margin: 2rem 0 3rem; padding: 0; list-style: none; }
.facts li { position: relative; padding-top: 0.875rem; }
.facts li::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px; border-radius: 3px; background: var(--k-gradient); transform-origin: left; transition: transform 900ms var(--k-ease); }
.facts li.reveal:not(.is-in)::before { transform: scaleX(0); }
.facts strong { display: block; font-family: var(--k-font-display); font-weight: 400; font-size: 1.75rem; line-height: 1.1; margin-bottom: 0.25rem; }
.facts span { color: var(--k-fg-muted); font-size: 0.9375rem; }
@media (min-width: 40rem) { .facts { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 64rem) { .facts { grid-template-columns: repeat(4, 1fr); } }
.table-note { color: var(--k-fg-muted); font-size: 0.875rem; margin: -1rem 0 2rem; max-width: 62ch; }
.facts + .table-note { margin-top: -2rem; }

.status-note { display: inline-flex; align-items: center; gap: 0.5rem; font-size: 0.875rem; font-weight: 500; color: var(--k-fg-muted); background: var(--k-bg-subtle); border-radius: 999px; padding: 0.25rem 0.875rem 0.25rem 0.625rem; margin: 0 0 1rem; }
.status-note::before { content: ""; width: 0.5rem; height: 0.5rem; border-radius: 50%; background: var(--k-warning); }

.planned { font-size: 0.75rem; font-weight: 500; text-transform: uppercase; letter-spacing: 0.06em; color: var(--k-fg-subtle); border: 1px solid var(--k-border); border-radius: 999px; padding: 0.1rem 0.5rem; vertical-align: middle; margin-left: 0.5rem; white-space: nowrap; }

.steps { counter-reset: step; list-style: none; padding: 0; margin: 1.5rem 0 2.5rem; max-width: var(--k-measure); }
.steps li { counter-increment: step; position: relative; padding-left: 3.25rem; margin-bottom: 1.25rem; }
.steps li::before { content: counter(step); position: absolute; left: 0; top: 0.05rem; width: 2.25rem; height: 2.25rem; border-radius: 50%; display: grid; place-items: center; font-family: var(--k-font-display); font-size: 1.25rem; color: var(--k-accent-fg); background: var(--k-accent-subtle); }
.steps h3 { margin: 0 0 0.25rem; font-size: 1.0625rem; }
.steps p { margin: 0; color: var(--k-fg-muted); }

.table-wrap { overflow-x: auto; margin: 1.5rem 0 2rem; border: 1px solid var(--k-border-subtle); border-radius: var(--k-radius-lg); background: var(--k-bg-surface); }
table { border-collapse: collapse; width: 100%; font-size: 0.9375rem; }
th, td { text-align: left; padding: 0.7rem 1rem; border-bottom: 1px solid var(--k-border-subtle); vertical-align: top; }
thead th { font-size: 0.8125rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--k-fg-subtle); font-weight: 500; background: var(--k-bg-subtle); }
tbody th { font-weight: 500; }
tbody tr:last-child th, tbody tr:last-child td { border-bottom: 0; }
tbody tr { transition: background-color var(--k-duration) var(--k-ease); }
tbody tr:hover { background: color-mix(in srgb, #2563eb 6%, transparent); }

.diagram { margin: 2rem 0 2.5rem; }
.diagram svg { display: block; width: 100%; height: auto; font-family: var(--k-font-sans); }
.diagram figcaption { font-size: 0.875rem; color: var(--k-fg-subtle); margin-top: 0.75rem; }
/* Diagram vocabulary used by content/diagrams/*.svg */
.d-box { fill: var(--k-bg-surface); stroke: var(--k-border-strong); stroke-width: 1.2; }
.d-box-subtle { fill: var(--k-bg-subtle); stroke: var(--k-border); stroke-width: 1; }
.d-box-accent { fill: var(--k-accent-subtle); stroke: var(--k-accent); stroke-width: 1.2; }
.d-box-ink { fill: #0f1830; stroke: color-mix(in srgb, #2563eb 55%, transparent); stroke-width: 1.2; }
.d-text { fill: var(--k-fg); font-size: 13px; font-weight: 500; }
.d-text-sm { fill: var(--k-fg-muted); font-size: 11px; }
.d-text-inverse { fill: #e6e9ee; font-size: 13px; font-weight: 500; }
.d-text-accent { fill: var(--k-accent-fg); font-size: 11px; font-weight: 500; text-transform: uppercase; letter-spacing: 0.06em; }
.d-line { stroke: var(--k-border-strong); stroke-width: 1.2; fill: none; }
.d-line-accent { stroke: var(--k-accent); stroke-width: 1.6; fill: none; }
.d-dash { stroke-dasharray: 4 3; }
.d-arrow { fill: var(--k-border-strong); }
.d-arrow-accent { fill: var(--k-accent); }

.callout { background: var(--k-bg-surface); border: 1px solid var(--k-border-subtle); border-left: 3px solid var(--k-accent); border-radius: var(--k-radius-md); padding: 1rem 1.25rem; margin: 1.5rem 0; max-width: var(--k-measure); }
.callout p:last-child { margin-bottom: 0; }

.cta-band { position: relative; overflow: hidden; isolation: isolate; margin: 4rem 0 0; padding: 2.5rem; background: #0f1830; color: #f4f5f7; border-radius: calc(var(--k-radius-lg) + 4px); display: grid; gap: 1.5rem; align-items: center; }
.cta-band::before { content: ""; position: absolute; z-index: -1; inset: -40%; background: conic-gradient(from var(--k-angle), #1e3a8a, #2563eb, #06b6d4, #7c3aed, #1e3a8a); filter: blur(60px); opacity: 0.55; animation: k-spin 14s linear infinite; }
.cta-band::after { content: ""; position: absolute; z-index: -1; inset: 0; background: linear-gradient(180deg, rgba(15, 24, 48, 0.6), rgba(15, 24, 48, 0.85)); }
.cta-band h2 { margin: 0; color: inherit; }
.cta-band p { margin: 0.5rem 0 0; color: inherit; opacity: 0.85; }
.cta-band .button-primary { background: #fff; color: #0f1830; box-shadow: 0 8px 24px -8px rgba(6, 182, 212, 0.7); }
.cta-band .button-primary:hover { background: #e6f6fb; }
@media (min-width: 48rem) { .cta-band { grid-template-columns: 1fr auto; } }

/* ------------------------------------------------------------------ forms */
.form { max-width: 36rem; margin: 1.5rem 0 2rem; }
.form-row { margin-bottom: 1.1rem; }
.form label { display: block; font-weight: 500; font-size: 0.9375rem; margin-bottom: 0.35rem; }
.form .hint { display: block; font-size: 0.8125rem; color: var(--k-fg-subtle); margin-top: 0.3rem; }
.form input, .form select, .form textarea {
  width: 100%; font: inherit; font-size: 1rem; color: var(--k-fg);
  background: var(--k-bg-surface); border: 1px solid var(--k-border-strong); border-radius: var(--k-radius-md);
  padding: 0.6rem 0.75rem; min-height: 2.75rem;
}
.form textarea { min-height: 7rem; resize: vertical; }
.form-grid { display: grid; gap: 0 1rem; }
@media (min-width: 40rem) { .form-grid { grid-template-columns: 1fr 1fr; } }
.form-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; margin-top: 0.5rem; }
.form-fallback { font-size: 0.9375rem; color: var(--k-fg-muted); }
.form-message { display: none; margin-top: 1rem; padding: 0.875rem 1rem; border-radius: var(--k-radius-md); border: 1px solid var(--k-border); background: var(--k-bg-surface); }
.form-message.is-visible { display: block; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* ------------------------------------------------------------------ footer */
.site-footer { border-top: 1px solid var(--k-border-subtle); padding: 3rem 0 2.5rem; font-size: 0.9375rem; color: var(--k-fg-muted); }
.footer-grid { display: grid; gap: 2rem 2.5rem; }
.footer-heading { font-family: var(--k-font-sans); font-size: 0.8125rem; font-weight: 500; text-transform: uppercase; letter-spacing: 0.06em; color: var(--k-fg-subtle); margin: 0 0 0.75rem; }
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col li { margin-bottom: 0.4rem; }
.footer-col a { color: var(--k-fg); text-decoration: none; }
.footer-col a:hover { text-decoration: underline; }
.footer-meta { margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--k-border-subtle); font-size: 0.875rem; }
.footer-meta p { margin: 0 0 0.5rem; max-width: 60rem; }
.footer-company { color: var(--k-fg); }
@media (min-width: 40rem) { .footer-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 64rem) { .footer-grid { grid-template-columns: repeat(4, 1fr); } }

/* ------------------------------------------------------------------ product screenshots */
.showcase { margin: 4rem 0 1rem; }
.showcase h2 { margin-top: 0; }
.showcase-lede { color: var(--k-fg-muted); max-width: var(--k-measure); }
.screen { margin: 1.75rem 0 0; position: relative; }
.screen figcaption { font-size: 0.875rem; color: var(--k-fg-subtle); margin-top: 0.75rem; }
.screen-main::before { content: ""; position: absolute; z-index: -1; inset: 8% 6% -4%; background: radial-gradient(50% 60% at 30% 40%, color-mix(in srgb, #2563eb 35%, transparent), transparent 70%), radial-gradient(45% 55% at 75% 60%, color-mix(in srgb, #06b6d4 28%, transparent), transparent 70%); filter: blur(40px); opacity: 0.8; }
.screen-frame { border-radius: 12px; overflow: hidden; background: var(--k-bg-surface); border: 1px solid var(--k-border); box-shadow: 0 30px 60px -30px rgba(15, 24, 48, 0.45), 0 12px 24px -12px rgba(15, 24, 48, 0.25); transition: transform 700ms var(--k-ease), box-shadow 300ms var(--k-ease); }
.screen-bar { display: flex; align-items: center; gap: 0.4rem; padding: 0.55rem 0.8rem; background: var(--k-bg-subtle); border-bottom: 1px solid var(--k-border-subtle); }
.screen-bar span { width: 0.65rem; height: 0.65rem; border-radius: 50%; background: var(--k-border); }
.screen-frame picture, .screen-frame img { display: block; width: 100%; height: auto; }
.screen-pair { display: grid; gap: 1.5rem; margin-top: 0.5rem; }
@media (min-width: 48rem) { .screen-pair { grid-template-columns: 1fr 1fr; } }
/* The main screenshot leans back slightly and straightens when it scrolls into view. */
@media (min-width: 60rem) {
  .screen-main { perspective: 1800px; }
  .screen-main .screen-frame { transform: rotateX(8deg) scale(0.97); transform-origin: center top; }
  .screen-main.is-in .screen-frame, .screen-main:not(.reveal) .screen-frame { transform: none; }
}
.screen:hover .screen-frame { box-shadow: 0 40px 80px -30px rgba(37, 99, 235, 0.45), 0 12px 24px -12px rgba(15, 24, 48, 0.25); }

/* ------------------------------------------------------------------ motion */
@property --k-angle { syntax: "<angle>"; inherits: false; initial-value: 0deg; }

.scroll-progress { position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; background: var(--k-gradient); transform-origin: left; transform: scaleX(var(--k-scroll, 0)); }

/* Logo: the stem rises and the two blades slide in once when the page loads. */
.brand-blade { transform-box: fill-box; transform-origin: left center; animation: k-blade 900ms cubic-bezier(0.2, 0.9, 0.2, 1) both; }
.brand-blade-up { animation-delay: 120ms; }
.brand-blade-down { animation-delay: 260ms; }
.brand-stem { transform-box: fill-box; transform-origin: center bottom; animation: k-stem 700ms cubic-bezier(0.2, 0.9, 0.2, 1) both; }
.brand:hover .brand-blade-up { transform: translate(1.5px, -1.5px); transition: transform 240ms var(--k-ease); }
.brand:hover .brand-blade-down { transform: translate(1.5px, 1.5px); transition: transform 240ms var(--k-ease); }

/* Reveal on scroll. site.js marks only elements below the fold, so nothing visible on load disappears and nothing is hidden without JavaScript. */
.reveal { transition: opacity 700ms var(--k-ease), transform 700ms var(--k-ease); transition-delay: var(--k-delay, 0ms); }
.reveal:not(.is-in) { opacity: 0; transform: translateY(18px); }

/* Diagrams: packets travel along the connectors (added by site.js), the accent connector flows. */
.diagram .d-packet { fill: var(--k-cyan); filter: drop-shadow(0 0 4px var(--k-cyan)); }
.diagram .d-packet-accent { fill: #2563eb; filter: drop-shadow(0 0 5px #2563eb); }
.diagram .d-line-accent { stroke-dasharray: 6 5; animation: k-dash 1.1s linear infinite; }
.hero-diagram .d-box-accent { animation: k-glow 4s ease-in-out infinite; }

@keyframes k-aurora { 0% { transform: translate3d(-4%, -2%, 0) scale(1); } 50% { transform: translate3d(4%, 3%, 0) scale(1.1); } 100% { transform: translate3d(-1%, 5%, 0) scale(1.04); } }
@keyframes k-grid { to { background-position: 3rem 3rem; } }
@keyframes k-headline { 0%, 100% { background-position: 100% 0; } 50% { background-position: 0% 0; } }
@keyframes k-pulse { 0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--k-cyan) 55%, transparent); } 80%, 100% { box-shadow: 0 0 0 9px transparent; } }
@keyframes k-spin { to { --k-angle: 360deg; } }
@keyframes k-blade { from { opacity: 0; transform: translateX(-10px) scaleX(0.6); } to { opacity: 1; transform: none; } }
@keyframes k-stem { from { opacity: 0; transform: scaleY(0.4); } to { opacity: 1; transform: none; } }
@keyframes k-dash { to { stroke-dashoffset: -22; } }
@keyframes k-glow { 0%, 100% { filter: drop-shadow(0 0 0 transparent); } 50% { filter: drop-shadow(0 0 10px color-mix(in srgb, #2563eb 45%, transparent)); } }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0ms !important; animation: none !important; }
  .reveal:not(.is-in) { opacity: 1; transform: none; }
  .facts li.reveal:not(.is-in)::before { transform: none; }
  .hero-home h1 { background-position: 50% 0; }
  .diagram .d-packet, .diagram .d-packet-accent { display: none; }
}

/* ------------------------------------------------------------------ print */
@media print {
  .reveal, .reveal:not(.is-in) { opacity: 1 !important; transform: none !important; }
  .site-header, .site-footer .footer-grid, .nav-toggle, .cta-band { display: none; }
  body { background: #fff; color: #000; }
  a { color: inherit; }
}