/* ==========================================================================
   Vezarus — "Signal" design system (revision 3)
   Noise in, one clean line out: a visual metaphor for an encrypted,
   obfuscated tunnel. Tokens below are the single source of truth;
   see docs/DESIGN_SYSTEM.md.
   ========================================================================== */

@font-face {
  font-family: "Manrope";
  src: url("../fonts/manrope-latin.woff2") format("woff2");
  font-weight: 400 800;
  font-style: normal;
  font-display: swap;
}

:root {
  /* --- Palette ---------------------------------------------------------
     Sampled from the app: night, indigo, violet (pulse core), haze.
     Added for the site (not present in the app UI): blue, cyan, black, paper. */
  --black: #05060f;          /* page background, deeper than the app's night */
  --night: #0f0e26;          /* app loading screen — raised dark surfaces */
  --deep: #0a1236;           /* deep blue surface for the "path" section */
  --indigo: #21145f;         /* app gradient top */
  --violet: #3e2ca5;         /* app accent — brand mark fill */
  --violet-light: #8f7dff;   /* secondary accent: noise lines, numerals */
  --haze: #6c6db5;           /* app glow — rings and hairline graphics */
  --blue: #4d6bff;           /* electric blue — beam, primary graphics (not small text on dark) */
  --cyan: #6fd6ff;           /* light blue — light pulses, highlights, text accents on dark */
  --white: #ffffff;
  --paper: #f5f6fb;          /* light sections and document bodies */

  /* --- Text (WCAG 2.2 AA, checked numerically) --- */
  --on-dark: var(--white);   /* 20.2 on black */
  --on-dark-soft: #b6bde0;   /* 10.9 on black · 9.8 on deep */
  --on-dark-muted: #8a91bb;  /* 6.6 on black · 5.9 on deep */
  --ink: #0b0d24;            /* 17.7 on paper */
  --ink-soft: #383d5c;       /* 9.8 on paper */
  --ink-muted: #565b7d;      /* 6.1 on paper */
  --link-light: #2b44d4;     /* 6.8 on paper */
  --accent-text: var(--cyan);/* 12.3 on black */

  /* --- Lines and surfaces --- */
  --hairline-dark: rgba(182, 189, 224, 0.14);
  --hairline-dark-strong: rgba(182, 189, 224, 0.26);
  --hairline-light: rgba(11, 13, 36, 0.12);
  --surface-dark: rgba(255, 255, 255, 0.03);
  --surface-dark-hover: rgba(255, 255, 255, 0.055);
  --gradient-signal: linear-gradient(90deg, var(--violet-light) 0%, var(--blue) 45%, var(--cyan) 100%);

  /* --- Typography --- */
  --font: "Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
  --fs-display: clamp(2.5rem, 1.1rem + 4.4vw, 5.25rem);
  --fs-h2: clamp(2rem, 1.3rem + 3vw, 3.75rem);
  --fs-h3: clamp(1.25rem, 1.1rem + 0.6vw, 1.5rem);
  --fs-lead: clamp(1.0625rem, 0.98rem + 0.45vw, 1.3125rem);
  --fs-body: 1.0625rem;
  --fs-small: 0.9375rem;
  --fs-label: 0.75rem;
  --tracking-display: -0.05em;
  --tracking-heading: -0.035em;
  --tracking-label: 0.14em;
  --lh-body: 1.6;

  /* --- Spacing --- */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: clamp(2.5rem, 1.5rem + 3vw, 4rem);
  --space-9: clamp(4rem, 2.5rem + 4vw, 7rem);

  /* --- Layout --- */
  --container: 1240px;
  --gutter: clamp(1rem, 0.5rem + 2.5vw, 2.5rem);
  --measure: 34rem;
  --header-h: 76px;

  /* --- Shape and depth --- */
  --radius-s: 10px;
  --radius-m: 18px;
  --radius-l: 28px;
  --radius-pill: 999px;
  --line: 1px;
  --shadow-glow: 0 0 0 1px rgba(111, 214, 255, 0.25), 0 8px 40px -8px rgba(77, 107, 255, 0.55);

  /* --- Motion --- */
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --dur-fast: 180ms;
  --dur: 800ms;

  /* Breakpoints (reference): sm 600px · md 900px · lg 1200px */
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 1rem); background: var(--black); }
body {
  margin: 0; background: var(--black); color: var(--on-dark);
  font-family: var(--font); font-size: var(--fs-body); line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; height: auto; }
h1, h2, h3, h4 { margin: 0; font-weight: 700; line-height: 1.06; letter-spacing: var(--tracking-heading); }
p { margin: 0; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.2em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 6px; }
.light :focus-visible, .doc-body :focus-visible { outline-color: var(--link-light); }
::selection { background: var(--blue); color: var(--white); }

.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip-link { position: absolute; left: var(--gutter); top: -60px; z-index: 100; background: var(--white); color: var(--black); padding: 0.75rem 1rem; border-radius: var(--radius-s); font-weight: 700; text-decoration: none; }
.skip-link:focus { top: 0.75rem; }
.mt-3 { margin-top: var(--space-3); }
.mt-5 { margin-top: var(--space-5); }

/* ---------- Light surface ---------- */
.light { background: var(--paper); color: var(--ink); }
.light a { color: var(--link-light); }

/* ---------- Type primitives ---------- */
.label {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font: 600 var(--fs-label)/1.2 var(--font-mono); letter-spacing: var(--tracking-label); text-transform: uppercase; color: var(--on-dark-muted);
}
.label::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 10px var(--cyan); }
.light .label, .doc-body .label { color: var(--ink-muted); }
.light .label::before, .doc-body .label::before { background: var(--blue); box-shadow: none; }
.label + h1, .label + h2 { margin-top: var(--space-5); }
.lead { font-size: var(--fs-lead); line-height: 1.55; color: var(--on-dark-soft); max-width: var(--measure); }
.light .lead { color: var(--ink-soft); }
.fine { font-size: var(--fs-small); color: var(--on-dark-muted); }
.light .fine, .doc-body .fine { color: var(--ink-muted); }
.soft { color: var(--on-dark-soft); }
.text-signal { background: var(--gradient-signal); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.6rem;
  min-height: 52px; padding: 0.85rem 1.5rem; border-radius: var(--radius-pill);
  font: 700 0.9375rem/1.1 var(--font); text-decoration: none; cursor: pointer;
  border: var(--line) solid transparent;
  transition: background-color var(--dur-fast) ease, color var(--dur-fast) ease, border-color var(--dur-fast) ease, box-shadow var(--dur-fast) ease, transform var(--dur-fast) ease;
}
.btn svg { width: 1rem; height: 1rem; transition: transform var(--dur-fast) ease; }
.btn:hover { text-decoration: none; }
.btn:hover svg { transform: translateX(3px); }
.btn--primary { background: var(--white); color: var(--black); box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.1), 0 10px 40px -10px rgba(111, 214, 255, 0.6); }
.btn--primary:hover { transform: translateY(-1px); box-shadow: var(--shadow-glow); }
.btn--ghost { color: var(--on-dark); border-color: var(--hairline-dark-strong); background: var(--surface-dark); }
.btn--ghost:hover { border-color: rgba(111, 214, 255, 0.5); background: var(--surface-dark-hover); }
.light .btn--primary, .doc-body .btn--primary { background: var(--ink); color: var(--white); box-shadow: none; }
.light .btn--primary:hover, .doc-body .btn--primary:hover { background: var(--link-light); }
.link-arrow { display: inline-flex; align-items: center; gap: 0.5rem; min-height: 48px; font-weight: 700; font-size: 0.9375rem; text-decoration: none; color: inherit; }
.link-arrow span { border-bottom: var(--line) solid currentColor; padding-bottom: 2px; }
.link-arrow:hover span { border-bottom-width: 2px; }
.link-arrow svg { width: 1rem; height: 1rem; transition: transform var(--dur-fast) ease; }
.link-arrow:hover svg { transform: translateX(3px); }

/* Status chip: shown instead of a download button while the app isn't released */
.status-chip {
  display: inline-flex; align-items: center; gap: 0.55rem; min-height: 40px; padding: 0.45rem 0.95rem;
  border: var(--line) solid var(--hairline-dark-strong); border-radius: var(--radius-pill);
  font: 600 0.8125rem/1.2 var(--font-mono); letter-spacing: 0.02em; color: var(--on-dark-soft); white-space: nowrap;
}
.status-chip i { width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 3px rgba(111, 214, 255, 0.18); }

/* ---------- Brand ---------- */
.brand { display: inline-flex; align-items: center; gap: 0.6rem; text-decoration: none; color: var(--on-dark); }
.brand { gap: 0.75rem; }
.brand-mark { width: 28px; height: auto; filter: drop-shadow(0 0 10px rgba(47, 99, 255, 0.45)); }
.brand-word { font-weight: 600; font-size: 0.9375rem; letter-spacing: 0.34em; margin-right: -0.34em; text-transform: uppercase; line-height: 1; }
.svg-defs { position: absolute; width: 0; height: 0; overflow: hidden; }

/* ---------- Header: floating capsule ---------- */
.site-header { position: sticky; top: 0; z-index: 50; height: var(--header-h); padding-top: 12px; }
.header-inner {
  height: 56px; display: flex; align-items: center; justify-content: space-between; gap: var(--space-5);
  padding-inline: 0.75rem 0.5rem 0.75rem; margin-inline: auto;
  border: var(--line) solid transparent; border-radius: var(--radius-pill);
  transition: background-color var(--dur-fast) ease, border-color var(--dur-fast) ease;
}
.header-inner.container { max-width: calc(var(--container) - 2 * var(--gutter) + 1.5rem); width: calc(100% - 2 * var(--gutter) + 1.5rem); padding-inline: 1rem 0.5rem; }
.site-header.is-scrolled .header-inner, .site-header.is-menu .header-inner {
  background: color-mix(in srgb, var(--black) 72%, transparent);
  -webkit-backdrop-filter: blur(14px) saturate(140%); backdrop-filter: blur(14px) saturate(140%);
  border-color: var(--hairline-dark);
}
.nav { display: flex; align-items: center; gap: clamp(1rem, 2vw, 2rem); }
.nav-links { display: flex; gap: clamp(1rem, 2vw, 2rem); list-style: none; margin: 0; padding: 0; }
.nav-links a { text-decoration: none; font-size: 0.9375rem; font-weight: 600; color: var(--on-dark-soft); padding: 0.5rem 0; transition: color var(--dur-fast) ease; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--on-dark); }
.nav .btn { min-height: 40px; padding: 0.5rem 1.05rem; font-size: 0.875rem; }
.nav-toggle {
  display: none; align-items: center; gap: 0.5rem; min-height: 44px; padding: 0 0.95rem;
  background: transparent; border: var(--line) solid var(--hairline-dark-strong); border-radius: var(--radius-pill);
  font: 700 0.875rem var(--font); color: var(--on-dark); cursor: pointer;
}
.nav-toggle svg { width: 18px; height: 18px; }
@media (max-width: 899px) {
  .nav-toggle { display: inline-flex; }
  .nav {
    position: fixed; inset: calc(var(--header-h) + 8px) var(--gutter) auto var(--gutter); flex-direction: column; align-items: stretch; gap: var(--space-5);
    padding: var(--space-3) var(--space-5) var(--space-5); background: var(--night); border: var(--line) solid var(--hairline-dark); border-radius: var(--radius-m);
    visibility: hidden; opacity: 0; transform: translateY(-8px);
    transition: opacity var(--dur-fast) ease, transform var(--dur-fast) ease, visibility 0s linear var(--dur-fast);
  }
  .nav.is-open { visibility: visible; opacity: 1; transform: none; transition-delay: 0s; }
  .nav-links { flex-direction: column; gap: 0; }
  .nav-links a { display: block; padding: 0.95rem 0; border-bottom: var(--line) solid var(--hairline-dark); font-size: 1.25rem; font-weight: 700; color: var(--on-dark); }
  .nav .status-chip { justify-content: center; }
  .nav .btn { width: 100%; min-height: 52px; font-size: 0.9375rem; }
}

/* ---------- Sections ---------- */
.section { padding-block: var(--space-9); position: relative; }
.section-head { display: grid; gap: var(--space-5); max-width: 48rem; margin-bottom: var(--space-8); }
.section-head h2 { font-size: var(--fs-h2); letter-spacing: var(--tracking-heading); }
.section-head--split { max-width: none; grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); align-items: end; column-gap: var(--space-7); }
.section-head--split .label { grid-column: 1 / -1; }
.section-head--split .lead { justify-self: end; }
@media (max-width: 899px) { .section-head--split { grid-template-columns: 1fr; } .section-head--split .lead { justify-self: start; } }

/* ---------- Hero ---------- */
.hero { position: relative; min-height: min(100svh, 860px); margin-top: calc(-1 * var(--header-h)); padding: calc(var(--header-h) + clamp(3rem, 2rem + 5vw, 7rem)) 0 var(--space-8); overflow: hidden; isolation: isolate; display: flex; align-items: center; }
.hero::before { /* dot field */
  content: ""; position: absolute; inset: 0; z-index: -2;
  background-image: radial-gradient(rgba(182, 189, 224, 0.16) 1px, transparent 1.2px); background-size: 26px 26px;
  -webkit-mask-image: radial-gradient(ellipse 55% 60% at 72% 48%, #000 0%, transparent 75%); mask-image: radial-gradient(ellipse 55% 60% at 72% 48%, #000 0%, transparent 75%);
}
.hero::after { /* fade into the next section */
  content: ""; position: absolute; inset: auto 0 0 0; height: 160px; z-index: -1; background: linear-gradient(180deg, transparent, var(--black));
}
.hero-inner { width: 100%; }
.hero-copy { max-width: 54rem; }
.hero h1 { font-size: var(--fs-display); line-height: 0.96; letter-spacing: var(--tracking-display); font-weight: 800; margin: var(--space-5) 0 var(--space-6); }
.hero h1 .line { display: block; }
.hero .lead { max-width: 33rem; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-3); margin-top: var(--space-6); }
.hero-meta { display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-5); list-style: none; margin: var(--space-7) 0 0; padding: 0; font: 500 0.8125rem/1.4 var(--font-mono); color: var(--on-dark-muted); letter-spacing: 0.02em; }
.hero-meta li { display: inline-flex; align-items: center; gap: 0.5rem; }
.hero-meta li::before { content: ""; width: 14px; height: 1px; background: var(--hairline-dark-strong); }

/* Light flow (hero): twisting translucent ribbons, generated by tools/gen_flow.py */
.lightflow { position: absolute; inset: 0; z-index: -1; pointer-events: none; }
.lightflow::before { content: ""; position: absolute; inset: 0; background: radial-gradient(ellipse 38% 42% at 74% 52%, rgba(77, 107, 255, 0.22), transparent 70%), radial-gradient(ellipse 30% 30% at 52% 88%, rgba(143, 125, 255, 0.16), transparent 70%); }
.lightflow svg, .cta-flow svg { position: relative; width: 100%; height: 100%; }
.ribbon { mix-blend-mode: screen; }
.ribbon--deep { opacity: 0.5; }
.ribbon--soft { opacity: 0.55; }
.ribbon--main { opacity: 0.85; }
.ribbon--sheen { opacity: 0.6; }
.filament { fill: none; stroke: var(--on-dark-soft); stroke-opacity: 0.18; stroke-width: 1; }
.filament--b, .filament--d { stroke: var(--violet-light); stroke-opacity: 0.22; }
.filament--c { stroke: var(--cyan); stroke-opacity: 0.16; }
.filament-light { fill: none; stroke: var(--cyan); stroke-width: 1.8; stroke-linecap: round; stroke-dasharray: 90 2600; stroke-dashoffset: 2690; opacity: 0; }
@media (prefers-reduced-motion: no-preference) {
  .js .filament-light { opacity: 0.9; animation: stream 6s cubic-bezier(0.45, 0, 0.25, 1) infinite; }
  .js .filament-light--b { animation-duration: 8s; animation-delay: -3s; }
  .js .is-paused .filament-light, .js .is-paused .track-pulse, .js .is-paused .flow { animation-play-state: paused; }
}
@keyframes stream { from { stroke-dashoffset: 2690; } to { stroke-dashoffset: 0; } }

@media (max-width: 899px) {
  .hero { min-height: 0; display: block; padding-bottom: 0; }
  .hero::before { -webkit-mask-image: radial-gradient(ellipse 90% 40% at 70% 85%, #000, transparent 75%); mask-image: radial-gradient(ellipse 90% 40% at 70% 85%, #000, transparent 75%); }
  .lightflow { position: relative; inset: auto; height: clamp(280px, 80vw, 440px); margin-top: var(--space-2); margin-inline: calc(-1 * var(--gutter)); overflow: hidden; }
  .lightflow svg { width: 200%; max-width: none; margin-left: -88%; }
  .hero-meta { margin-top: var(--space-6); }
}

/* ---------- How it works: three steps on a track ---------- */
.steps-wrap { position: relative; }
.steps { position: relative; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-6); list-style: none; margin: 0; padding: 0; counter-reset: step; }
.steps::before { content: ""; position: absolute; left: 0; right: 0; top: 7px; height: 1px; background: linear-gradient(90deg, var(--hairline-dark-strong), rgba(111, 214, 255, 0.45), var(--hairline-dark-strong)); }
.track-pulse { position: absolute; top: 4px; left: 0; width: 80px; height: 7px; border-radius: 4px; background: linear-gradient(90deg, transparent, var(--cyan)); filter: drop-shadow(0 0 6px var(--cyan)); opacity: 0; }
@media (prefers-reduced-motion: no-preference) { .js .track-pulse { opacity: 1; animation: track 5s var(--ease) infinite; } }
@keyframes track { 0% { transform: translateX(-80px); opacity: 0; } 10% { opacity: 1; } 90% { opacity: 1; } 100% { transform: translateX(var(--track-w, 1100px)); opacity: 0; } }
.steps li { position: relative; padding-top: var(--space-7); counter-increment: step; }
.steps li::before { content: ""; position: absolute; top: 0; left: 0; width: 15px; height: 15px; border-radius: 50%; background: var(--black); border: 2px solid var(--cyan); box-shadow: 0 0 0 5px rgba(111, 214, 255, 0.08); }
.steps li::after { content: "0" counter(step); position: absolute; top: -3px; left: 30px; font: 600 0.8125rem/1.6 var(--font-mono); color: var(--on-dark-muted); letter-spacing: 0.06em; }
.steps h3 { font-size: clamp(1.5rem, 1.2rem + 1vw, 2rem); letter-spacing: -0.03em; margin-bottom: var(--space-3); }
.steps p { color: var(--on-dark-soft); max-width: 22rem; }
@media (max-width: 899px) {
  .steps { grid-template-columns: 1fr; gap: var(--space-6); padding-left: 34px; }
  .steps::before { top: 0; bottom: 0; left: 7px; right: auto; width: 1px; height: auto; background: linear-gradient(180deg, var(--hairline-dark-strong), rgba(111, 214, 255, 0.45), var(--hairline-dark-strong)); }
  .track-pulse { display: none; }
  .steps li { padding-top: 0; }
  .steps li::before { left: -34px; }
  .steps li::after { top: 0; left: auto; right: 0; }
}

/* ---------- The path: what happens when you connect ---------- */
.section--deep { background: radial-gradient(ellipse 80% 70% at 50% 0%, rgba(77, 107, 255, 0.16), transparent 70%), var(--deep); border-block: var(--line) solid var(--hairline-dark); }
.path { display: grid; grid-template-columns: auto minmax(0, 1.3fr) auto minmax(0, 1fr) auto; align-items: center; gap: 0; margin-top: var(--space-7); }
.node { display: grid; justify-items: center; gap: var(--space-3); text-align: center; }
.node-icon { width: 72px; height: 72px; display: grid; place-items: center; border-radius: 22px; border: var(--line) solid var(--hairline-dark-strong); background: rgba(5, 6, 15, 0.5); color: var(--on-dark); }
.node-icon svg { width: 30px; height: 30px; }
.node--server .node-icon { border-color: rgba(111, 214, 255, 0.5); box-shadow: 0 0 40px -6px rgba(77, 107, 255, 0.7); }
.node-name { font-weight: 700; font-size: 1rem; }
.node-note { font: 500 0.75rem/1.3 var(--font-mono); color: var(--on-dark-muted); letter-spacing: 0.04em; }
.link { position: relative; height: 72px; display: grid; align-items: center; margin-inline: var(--space-4); }
.link-line { position: relative; height: 2px; background: var(--hairline-dark-strong); overflow: hidden; border-radius: 2px; }
.link--tunnel .link-line { height: 10px; background: rgba(77, 107, 255, 0.14); border: 1px solid rgba(111, 214, 255, 0.45); box-shadow: 0 0 30px -4px rgba(77, 107, 255, 0.8); border-radius: 6px; }
.flow { position: absolute; inset: 0; background-repeat: repeat-x; background-size: 48px 100%; }
.link--tunnel .flow { background-image: linear-gradient(90deg, transparent 0 20px, var(--cyan) 20px 30px, transparent 30px); opacity: 0.9; }
.link--open .flow { background-image: linear-gradient(90deg, transparent 0 34px, var(--on-dark-soft) 34px 40px, transparent 40px); opacity: 0.5; }
@media (prefers-reduced-motion: no-preference) { .js .flow { animation: flow 1.6s linear infinite; } .js .link--open .flow { animation-duration: 2.4s; } }
@keyframes flow { to { background-position: 48px 0; } }
.link-caption { position: absolute; left: 50%; top: calc(50% + 18px); transform: translateX(-50%); font: 600 0.75rem/1.3 var(--font-mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--accent-text); white-space: nowrap; }
.link--open .link-caption { color: var(--on-dark-muted); }
.facts-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin-top: var(--space-8); border-top: var(--line) solid var(--hairline-dark); }
.fact { padding: var(--space-6) var(--space-6) 0 0; }
.fact + .fact { padding-left: var(--space-6); border-left: var(--line) solid var(--hairline-dark); }
.fact h3 { font-size: var(--fs-h3); margin-bottom: var(--space-3); }
.fact p { color: var(--on-dark-soft); font-size: var(--fs-small); }
@media (max-width: 899px) {
  .path { grid-template-columns: 1fr; justify-items: center; gap: 0; }
  .link { width: 100%; height: 120px; margin: var(--space-3) 0; justify-items: center; align-items: stretch; }
  .link-line { width: 2px; height: 120px; }
  .link--tunnel .link-line { width: 10px; height: 120px; }
  .flow { background-repeat: repeat-y; background-size: 100% 48px; }
  .link--tunnel .flow { background-image: linear-gradient(180deg, transparent 0 20px, var(--cyan) 20px 30px, transparent 30px); }
  .link--open .flow { background-image: linear-gradient(180deg, transparent 0 34px, var(--on-dark-soft) 34px 40px, transparent 40px); }
  .link-caption { left: calc(50% + 20px); top: 50%; transform: translateY(-50%); white-space: normal; max-width: 9.5rem; }
  @keyframes flow { to { background-position: 0 48px; } }
  .facts-grid { grid-template-columns: 1fr; }
  .fact, .fact + .fact { padding: var(--space-5) 0; border-left: none; }
  .fact + .fact { border-top: var(--line) solid var(--hairline-dark); }
}

/* ---------- Why Vezarus: bento ---------- */
.bento { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-4); }
.tile {
  --mx: 50%; --my: 0%;
  position: relative; overflow: hidden; display: flex; flex-direction: column; justify-content: space-between; gap: var(--space-6);
  min-height: 300px; padding: clamp(1.5rem, 1rem + 1.5vw, 2.25rem);
  border: var(--line) solid var(--hairline-dark); border-radius: var(--radius-l);
  background: radial-gradient(500px circle at var(--mx) var(--my), rgba(111, 214, 255, 0.07), transparent 45%), linear-gradient(180deg, rgba(255, 255, 255, 0.035), rgba(255, 255, 255, 0.01));
  transition: border-color var(--dur-fast) ease;
}
.tile:hover { border-color: var(--hairline-dark-strong); }
.tile--wide { grid-column: span 2; }
.tile h3 { font-size: clamp(1.5rem, 1.2rem + 1vw, 2rem); letter-spacing: -0.03em; margin-bottom: var(--space-3); }
.tile p { color: var(--on-dark-soft); max-width: 30rem; }
.tile-art { position: relative; flex: 1; display: flex; align-items: center; min-height: 110px; }
.tile--wide { flex-direction: row; align-items: stretch; }
.tile--wide .tile-text { flex: 1 1 50%; display: flex; flex-direction: column; justify-content: flex-end; }
.tile--wide .tile-art { flex: 1 1 50%; justify-content: center; }
/* Key art */
.key { width: 100%; max-width: 320px; display: grid; gap: var(--space-3); }
.key-row { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); padding: 0.9rem 1.1rem; border-radius: var(--radius-m); border: var(--line) solid var(--hairline-dark-strong); background: rgba(5, 6, 15, 0.6); font: 500 0.8125rem/1.3 var(--font-mono); color: var(--on-dark-muted); }
.key-row strong { color: var(--on-dark); font-weight: 600; letter-spacing: 0.18em; }
.key-row--new { border-color: rgba(111, 214, 255, 0.45); box-shadow: 0 0 30px -10px rgba(111, 214, 255, 0.7); }
.key-row--old { opacity: 0.4; border-style: dashed; }
.key-tag { font-size: 0.6875rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent-text); }
.key-row--old .key-tag { color: var(--on-dark-muted); }
/* Free art */
.big-word { font-size: clamp(4rem, 2.5rem + 6vw, 7.5rem); font-weight: 800; letter-spacing: -0.06em; line-height: 0.9; }
/* Struck pills art */
.struck { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.struck span { padding: 0.5rem 0.9rem; border-radius: var(--radius-pill); border: var(--line) dashed var(--hairline-dark-strong); font: 500 0.8125rem/1.2 var(--font-mono); color: var(--on-dark-muted); text-decoration: line-through; text-decoration-color: var(--violet-light); text-decoration-thickness: 2px; }
/* Mini signal art */
.mini-signal { width: 100%; max-width: 380px; }
.mini-signal .noise { fill: none; stroke: var(--violet-light); stroke-opacity: 0.7; stroke-width: 1.25; }
.mini-signal .beam { fill: none; stroke: url(#mini-grad); stroke-width: 3; stroke-linecap: round; }
@media (max-width: 899px) {
  .bento { grid-template-columns: 1fr; }
  .tile--wide { grid-column: auto; flex-direction: column-reverse; }
  .tile { min-height: 0; }
}

/* ---------- Privacy (light) ---------- */
.privacy-grid { display: grid; grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr); gap: clamp(2rem, 6vw, 6rem); align-items: start; }
.privacy-grid h2 { font-size: var(--fs-h2); }
.commitment { margin-top: var(--space-6); padding: var(--space-5) var(--space-5) var(--space-5) var(--space-5); border-radius: var(--radius-m); background: var(--white); border: var(--line) solid var(--hairline-light); font-size: clamp(1.125rem, 1rem + 0.5vw, 1.375rem); font-weight: 700; line-height: 1.35; letter-spacing: -0.015em; color: var(--ink); position: relative; }
.commitment::before { content: ""; position: absolute; left: 0; top: 18px; bottom: 18px; width: 3px; border-radius: 3px; background: linear-gradient(180deg, var(--blue), var(--cyan)); }
.privacy-actions { margin-top: var(--space-5); }
.ledger { margin: 0; border-top: var(--line) solid var(--hairline-light); }
.ledger-row { display: grid; grid-template-columns: 9rem 1fr; gap: var(--space-5); padding: var(--space-5) 0; border-bottom: var(--line) solid var(--hairline-light); }
.ledger dt { font: 600 0.75rem/1.6 var(--font-mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-muted); padding-top: 0.15rem; }
.ledger dd { margin: 0; color: var(--ink); }
@media (max-width: 899px) { .privacy-grid { grid-template-columns: 1fr; } .ledger-row { grid-template-columns: 1fr; gap: var(--space-2); } }

/* ---------- FAQ ---------- */
.light + .light { padding-top: 0; }
.faq-grid { display: grid; grid-template-columns: minmax(0, 0.7fr) minmax(0, 1.3fr); gap: clamp(2rem, 6vw, 6rem); align-items: start; padding-top: var(--space-8); border-top: var(--line) solid var(--hairline-light); }
.faq-grid h2 { font-size: var(--fs-h2); }
.faq { border-top: var(--line) solid var(--hairline-light); }
.faq details { border-bottom: var(--line) solid var(--hairline-light); }
.faq summary { list-style: none; cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: var(--space-5); padding: var(--space-5) 0; font-weight: 700; font-size: 1.125rem; letter-spacing: -0.01em; color: var(--ink); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; flex: none; width: 32px; height: 32px; display: grid; place-items: center; border-radius: 50%; border: var(--line) solid var(--hairline-light); font-weight: 500; font-size: 1.125rem; line-height: 1; color: var(--link-light); transition: transform var(--dur-fast) ease, background-color var(--dur-fast) ease; }
.faq details[open] summary::after { transform: rotate(45deg); background: var(--white); }
.faq summary:hover { color: var(--link-light); }
.faq .answer { padding: 0 3.5rem var(--space-5) 0; color: var(--ink-soft); }
.faq .answer p + p, .faq .answer ol + p { margin-top: var(--space-3); }
.faq .answer ol { margin: 0; padding-left: 1.25rem; }
.faq .answer li + li { margin-top: 0.35rem; }
.doc-body .faq-grid { border-top: none; padding-top: 0; }
@media (max-width: 899px) { .faq-grid { grid-template-columns: 1fr; } .faq .answer { padding-right: 0; } }

/* ---------- Final CTA ---------- */
.cta { position: relative; text-align: center; overflow: hidden; isolation: isolate; }
.cta::before { content: ""; position: absolute; inset: 0; z-index: -1; background: radial-gradient(ellipse 60% 55% at 50% 40%, rgba(77, 107, 255, 0.18), transparent 70%); }
.cta-flow { position: absolute; left: 0; right: 0; top: var(--space-6); height: 220px; z-index: -1; pointer-events: none; -webkit-mask-image: linear-gradient(90deg, transparent, #000 18%, #000 82%, transparent); mask-image: linear-gradient(90deg, transparent, #000 18%, #000 82%, transparent); }
.cta .container { padding-top: 170px; }
.cta h2 { font-size: clamp(2.75rem, 1.4rem + 5.5vw, 6rem); font-weight: 800; letter-spacing: var(--tracking-display); line-height: 0.96; }
.cta .lead { margin: var(--space-5) auto var(--space-6); }
.cta-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: var(--space-3); }

/* ---------- Footer ---------- */
.site-footer { background: var(--black); color: var(--on-dark-soft); padding: var(--space-8) 0 var(--space-6); border-top: var(--line) solid var(--hairline-dark); font-size: var(--fs-small); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: var(--space-6); }
.site-footer h2 { font: 600 var(--fs-label)/1.2 var(--font-mono); letter-spacing: var(--tracking-label); text-transform: uppercase; color: var(--on-dark-muted); margin-bottom: var(--space-4); }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li a { display: inline-block; padding: 0.35rem 0; text-decoration: none; color: var(--on-dark-soft); }
.site-footer li a:hover { color: var(--on-dark); }
.footer-about p { margin-top: var(--space-4); max-width: 22rem; }
.footer-bottom { margin-top: var(--space-8); padding-top: var(--space-5); border-top: var(--line) solid var(--hairline-dark); display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-4); color: var(--on-dark-muted); font-size: 0.8125rem; }
.footer-bottom p { max-width: 46rem; }
@media (max-width: 899px) { .footer-grid { grid-template-columns: 1fr 1fr; } .footer-about { grid-column: 1 / -1; } }
@media (max-width: 420px) { .footer-grid { grid-template-columns: 1fr; } }

/* ---------- Document pages ---------- */
.doc-hero { position: relative; margin-top: calc(-1 * var(--header-h)); padding-block: calc(var(--header-h) + clamp(2.5rem, 1rem + 5vw, 5rem)) var(--space-7); overflow: hidden; isolation: isolate; }
.doc-hero::before { content: ""; position: absolute; inset: 0; z-index: -1; background: radial-gradient(ellipse 50% 90% at 85% 0%, rgba(77, 107, 255, 0.16), transparent 70%); }
.doc-hero h1 { font-size: clamp(2.5rem, 1.6rem + 4vw, 4.75rem); font-weight: 800; letter-spacing: var(--tracking-display); line-height: 1; margin-bottom: var(--space-5); }
.doc-meta { margin-top: var(--space-5); font: 500 0.8125rem/1.5 var(--font-mono); color: var(--on-dark-muted); }
.doc-body { background: var(--paper); color: var(--ink); }
.doc-body a { color: var(--link-light); }
.doc-layout { display: grid; grid-template-columns: 15rem minmax(0, 1fr); gap: clamp(2rem, 6vw, 6rem); padding-block: var(--space-8); }
.toc { position: sticky; top: calc(var(--header-h) + 1.5rem); align-self: start; font-size: var(--fs-small); }
.toc h2 { font: 600 var(--fs-label)/1.2 var(--font-mono); letter-spacing: var(--tracking-label); text-transform: uppercase; color: var(--ink-muted); margin-bottom: var(--space-3); }
.toc ol { list-style: none; margin: 0; padding: 0; }
.doc-body .toc a { display: block; padding: 0.4rem 0; color: var(--ink-soft); text-decoration: none; border-bottom: var(--line) solid var(--hairline-light); }
.doc-body .toc a:hover { color: var(--link-light); }
.doc { max-width: 42rem; }
.doc section + section { margin-top: var(--space-7); }
.doc h2 { font-size: clamp(1.5rem, 1.25rem + 1vw, 2rem); margin-bottom: var(--space-4); color: var(--ink); }
.doc p, .doc li { color: var(--ink-soft); }
.doc p + p { margin-top: var(--space-4); }
.doc ul, .doc ol { padding-left: 1.25rem; margin: var(--space-3) 0 0; }
.doc li + li { margin-top: 0.4rem; }
.doc strong { color: var(--ink); }
.doc .tbc { color: var(--violet); font-weight: 700; }
.doc .summary { padding: var(--space-5); background: var(--white); border-radius: var(--radius-m); margin-bottom: var(--space-7); border: var(--line) solid var(--hairline-light); }
.doc .summary h2 { font-size: 1.25rem; margin-bottom: var(--space-2); }
.doc .callout { padding: var(--space-4) var(--space-5); border-left: 3px solid var(--blue); background: var(--white); color: var(--ink); font-weight: 700; font-size: 1.125rem; line-height: 1.45; }
.table-wrap { overflow-x: auto; margin-top: var(--space-4); }
.doc table { width: 100%; border-collapse: collapse; font-size: var(--fs-small); min-width: 30rem; }
.doc th, .doc td { text-align: left; vertical-align: top; padding: 0.8rem 0.75rem 0.8rem 0; border-bottom: var(--line) solid var(--hairline-light); color: var(--ink-soft); }
.doc th { color: var(--ink); font-weight: 700; }
@media (max-width: 899px) { .doc-layout { grid-template-columns: minmax(0, 1fr); } .toc { position: static; } }

/* Support */
.section--tight { padding-block: var(--space-8); }
.section--tight + .section--tight { padding-top: 0; }
.contact-row { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: var(--line) solid var(--hairline-light); border-bottom: var(--line) solid var(--hairline-light); }
.contact-item { padding: var(--space-6) var(--space-5) var(--space-6) 0; }
.contact-item + .contact-item { border-left: var(--line) solid var(--hairline-light); padding-left: var(--space-5); }
.contact-item h2 { font-size: 1.25rem; margin-bottom: var(--space-3); color: var(--ink); }
.contact-item p { color: var(--ink-soft); font-size: var(--fs-small); }
.contact-item .mail { display: inline-block; margin-top: var(--space-4); font-weight: 700; word-break: break-word; }
@media (max-width: 899px) {
  .contact-row { grid-template-columns: 1fr; }
  .contact-item, .contact-item + .contact-item { padding: var(--space-5) 0; border-left: none; }
  .contact-item + .contact-item { border-top: var(--line) solid var(--hairline-light); }
}

/* 404 */
.notfound { min-height: 60vh; display: grid; align-content: center; justify-items: start; gap: var(--space-5); padding-block: var(--space-9); }
.notfound h1 { font-size: var(--fs-display); font-weight: 800; letter-spacing: var(--tracking-display); line-height: 1; }

/* ---------- Reveal ---------- */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease); }
.js .reveal.is-visible { opacity: 1; transform: none; }
.js .reveal-delay-1 { transition-delay: 90ms; }
.js .reveal-delay-2 { transition-delay: 180ms; }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition-duration: 0.001ms !important; }
  .js .reveal { opacity: 1; transform: none; }
}

@media print {
  .site-header, .site-footer, .nav-toggle, .toc, .cta, .lightflow { display: none !important; }
  body, .doc-body { background: #fff; color: #000; }
}