/* ============================================================
 * Samizdat landing page
 * Same design tokens as the desktop client (clients/desktop/src/styles/tokens.css).
 * Plain HTML + CSS, no framework. Kept portable on purpose.
 * ============================================================ */

:root {
  --paper: #f2eee5;
  --paper-warm: #e8e2d5;
  --paper-sunk: #ece5d6;
  --ink: #0a0908;
  --ink-soft: #3a3836;
  --ink-faint: #6b6862;
  --hairline: rgba(10, 9, 8, 0.22);
  --hairline-soft: rgba(10, 9, 8, 0.1);
  --signal: #d72638;
  --signal-deep: #b01c2c;
  --data: #6fb7c7;

  --font-display: "PP Editorial Old", "Times New Roman", Times, serif;
  --font-body: "General Sans", ui-sans-serif, system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --tracking-caps: 0.08em;
  --tracking-tight: -0.02em;
  --page-pad: clamp(24px, 6vw, 120px);
  --ease-pull: cubic-bezier(0.2, 0.9, 0.3, 1);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  font-variant-numeric: tabular-nums;
  overflow-x: hidden;
}

/* grain overlay */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(0, 0, 0, 0.04) 1px, transparent 1px),
                    radial-gradient(rgba(0, 0, 0, 0.025) 1px, transparent 1px);
  background-size: 3px 3px, 5px 5px;
  background-position: 0 0, 1px 2px;
  mix-blend-mode: multiply;
  opacity: 0.55;
  z-index: 9999;
}

a { color: var(--ink); text-decoration: none; }
a:hover { color: var(--signal); }

::selection { background: var(--signal); color: var(--paper); }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: var(--tracking-tight);
  margin: 0;
  line-height: 1.05;
}
em { font-style: italic; color: var(--signal-deep); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* -------------------- buttons ----------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 10px;
  padding: 12px 22px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--ink);
  background: transparent;
  border: 1.5px solid var(--ink);
  transition: background .18s var(--ease-pull), color .18s var(--ease-pull);
  cursor: pointer;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn--signal { color: var(--paper); background: var(--signal); border-color: var(--signal); }
.btn--signal:hover { background: var(--signal-deep); border-color: var(--signal-deep); color: var(--paper); }
.btn--ghost { border-color: var(--hairline); color: var(--ink-soft); }
.btn--ghost:hover { border-color: var(--ink); background: transparent; color: var(--ink); }
.btn--outline { border: 1.5px solid var(--ink); }
.btn--lg { padding: 16px 28px; font-size: 14px; }

/* -------------------- nav --------------------------------- */
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 22px var(--page-pad);
  border-bottom: 0.5px solid var(--hairline);
  background: var(--paper);
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(1.2);
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-display); font-style: italic;
  font-size: 20px; color: var(--ink);
}
.brand-s { color: var(--signal); font-weight: 700; }
.nav nav { display: flex; gap: 22px; align-items: center; }
.nav nav a { font-size: 13px; font-weight: 500; letter-spacing: 0.04em; color: var(--ink-soft); }
.nav nav a.btn { color: var(--ink); }
.nav nav a.btn.btn--signal { color: var(--paper); }

/* -------------------- hero -------------------------------- */
.hero {
  position: relative;
  padding: clamp(56px, 10vh, 140px) var(--page-pad) 96px;
  overflow: hidden;
}
.hero-inner { max-width: 1080px; position: relative; z-index: 1; }
.hero h1 {
  margin-top: 22px;
  font-size: clamp(48px, 7vw, 112px);
  letter-spacing: var(--tracking-tight);
}
.hero .lede {
  margin-top: 28px;
  max-width: 64ch;
  font-size: clamp(17px, 1.6vw, 21px);
  line-height: 1.55;
  color: var(--ink-soft);
}
.hero-ctas {
  margin-top: 40px;
  display: flex; flex-wrap: wrap; gap: 14px;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin: 72px 0 0;
  padding: 0;
  border-top: 0.5px solid var(--hairline);
}
.hero-stats > div {
  padding: 20px 24px 0 0;
  border-right: 0.5px solid var(--hairline);
}
.hero-stats > div:last-child { border-right: 0; }
.hero-stats dt {
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-faint);
}
.hero-stats dd {
  margin: 8px 0 0; font-family: var(--font-display); font-size: 28px; font-style: italic;
  letter-spacing: var(--tracking-tight);
}

/* stamp field — diagonal UNCENSORED pattern */
.stamp-field {
  position: absolute; inset: -10%;
  pointer-events: none;
  opacity: 0.06;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml;utf8,\
<svg xmlns='http://www.w3.org/2000/svg' width='600' height='160' viewBox='0 0 600 160'>\
  <g fill='none' stroke='%23D72638' stroke-width='6'>\
    <rect x='6' y='6' width='588' height='148' rx='4'/>\
    <rect x='18' y='18' width='564' height='124' rx='2'/>\
  </g>\
  <text x='300' y='103' text-anchor='middle' font-family='Georgia, Times, serif' font-style='italic' font-weight='700' font-size='78' fill='%23D72638' letter-spacing='8'>UNCENSORED</text>\
</svg>");
  background-repeat: repeat;
  background-size: 540px auto;
  transform: rotate(-14deg);
  filter: contrast(1.2);
}

/* -------------------- section head ------------------------ */
.section-head {
  display: grid;
  gap: 14px;
  padding: 88px var(--page-pad) 36px;
  border-top: 0.5px solid var(--hairline);
}
.section-head h2 {
  font-size: clamp(34px, 4vw, 56px);
}

/* -------------------- why --------------------------------- */
.why-grid {
  padding: 0 var(--page-pad) 88px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 48px 64px;
}
.why-grid h3 {
  font-size: 24px; margin-bottom: 10px;
}
.why-grid p { max-width: 56ch; color: var(--ink-soft); }

/* -------------------- protocols --------------------------- */
.rails {
  list-style: none; padding: 0 var(--page-pad) 16px; margin: 0;
}
.rails li {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 32px;
  padding: 32px 0;
  border-top: 0.5px solid var(--hairline);
}
.rails li:last-child { border-bottom: 0.5px solid var(--hairline); }
.rail-num {
  font-family: var(--font-mono);
  font-size: 64px; font-weight: 500;
  color: var(--ink-faint);
  line-height: 1;
}
.rail-body h3 { font-size: 30px; letter-spacing: var(--tracking-tight); }
.rail-meta {
  margin: 6px 0 14px;
  font-family: var(--font-mono); font-size: 12px;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--signal);
}
.rail-body p { max-width: 60ch; color: var(--ink-soft); }
.rails-note {
  padding: 24px var(--page-pad) 72px;
  font-family: var(--font-mono); font-size: 13px;
  color: var(--ink-faint);
}

/* -------------------- apps -------------------------------- */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  padding: 0 var(--page-pad) 88px;
  border-top: 0.5px solid var(--hairline);
}
.apps-grid > div {
  padding: 32px 24px 0 0;
  border-right: 0.5px solid var(--hairline);
}
.apps-grid > div:last-child { border-right: 0; padding-right: 0; }
.apps-grid h4 {
  font-size: 28px; font-style: italic;
  letter-spacing: var(--tracking-tight); margin-bottom: 10px;
}
.apps-grid p { color: var(--ink-soft); font-size: 14px; }

/* -------------------- pricing ----------------------------- */
.plan {
  margin: 0 var(--page-pad) 88px;
  padding: 56px;
  border: 1.5px solid var(--ink);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 56px;
  align-items: center;
  background: var(--paper-warm);
  position: relative;
}
.plan::after {
  content: ""; position: absolute; inset: 8px; pointer-events: none;
  border: 0.5px solid var(--ink); opacity: 0.25;
}
.plan-price {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--ink);
  line-height: 1;
  display: flex; align-items: flex-start; gap: 4px;
}
.plan-currency { font-size: 56px; margin-top: 14px; }
.plan-num { font-size: clamp(110px, 14vw, 180px); letter-spacing: -0.04em; color: var(--signal); }
.plan-unit { font-size: 28px; margin-top: 28px; color: var(--ink-soft); }

.plan-body ul {
  list-style: none; padding: 0; margin: 0 0 28px;
  display: grid; gap: 10px;
  font-family: var(--font-mono); font-size: 15px;
}
.plan-ctas { display: flex; flex-wrap: wrap; gap: 14px; }
.plan-pay {
  margin-top: 18px;
  font-family: var(--font-mono); font-size: 12px; color: var(--ink-faint);
  letter-spacing: 0.06em;
}

/* -------------------- faq --------------------------------- */
.faq-list {
  padding: 0 var(--page-pad) 88px;
  margin: 0;
  display: grid;
  gap: 0;
  border-top: 0.5px solid var(--hairline);
}
.faq-list > div {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) 2fr;
  gap: 40px;
  padding: 28px 0;
  border-bottom: 0.5px solid var(--hairline);
}
.faq-list dt {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 22px;
  letter-spacing: var(--tracking-tight);
}
.faq-list dd {
  margin: 0; color: var(--ink-soft); max-width: 64ch;
}
.faq-list dd a { color: var(--signal); text-decoration: underline; text-underline-offset: 3px; }

/* -------------------- footer ------------------------------ */
.foot {
  padding: 56px var(--page-pad) 40px;
  border-top: 0.5px solid var(--hairline);
  background: var(--paper-warm);
}
.foot-top {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 64px;
}
.foot-brand {
  font-family: var(--font-display); font-style: italic; font-size: 22px;
}
.foot-tag {
  margin-top: 14px; color: var(--ink-soft); font-family: var(--font-body);
  font-style: normal; font-size: 14px; max-width: 32ch;
}
.foot-cols {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px;
}
.foot-cols h5 {
  font-family: var(--font-mono); font-size: 12px;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--ink-faint); margin: 0 0 14px;
}
.foot-cols a { display: block; padding: 5px 0; color: var(--ink-soft); font-size: 14px; }
.foot-cols a:hover { color: var(--signal); }
.foot-bottom {
  margin-top: 40px; padding-top: 22px; border-top: 0.5px solid var(--hairline);
  display: flex; justify-content: space-between;
  font-family: var(--font-mono); font-size: 12px; color: var(--ink-faint);
  letter-spacing: 0.04em;
}

/* -------------------- responsive -------------------------- */
@media (max-width: 900px) {
  .nav { padding: 18px 20px; }
  .nav nav { gap: 14px; }
  .nav nav a:not(.btn) { display: none; }
  .hero-stats { grid-template-columns: 1fr; }
  .hero-stats > div { border-right: 0; border-bottom: 0.5px solid var(--hairline); padding: 18px 0; }
  .why-grid { grid-template-columns: 1fr; gap: 40px; }
  .apps-grid { grid-template-columns: 1fr 1fr; }
  .apps-grid > div:nth-child(2n) { border-right: 0; }
  .plan { grid-template-columns: 1fr; gap: 32px; padding: 32px; }
  .faq-list > div { grid-template-columns: 1fr; gap: 14px; }
  .foot-top { grid-template-columns: 1fr; gap: 36px; }
  .foot-cols { grid-template-columns: 1fr 1fr; }
  .foot-bottom { flex-direction: column; gap: 10px; }
  .rails li { grid-template-columns: 1fr; gap: 12px; }
  .rail-num { font-size: 40px; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0a0908;
    --paper-warm: #14120f;
    --paper-sunk: #17150f;
    --ink: #f2eee5;
    --ink-soft: #c8c2b6;
    --ink-faint: #8a8378;
    --hairline: rgba(242, 238, 229, 0.22);
    --signal: #e43a4b;
    --signal-deep: #c22a3a;
  }
  body::before { mix-blend-mode: screen; opacity: 0.3; }
  .stamp-field { mix-blend-mode: screen; opacity: 0.1; }
}