/* ===========================================================================
 * ch-auth.css — branded auth surfaces (sign-in walls, gated screens)
 * Light editorial palette. No JS dependencies.
 * =========================================================================== */
:root {
  --bg: #faf9f6;
  --surface: #ffffff;
  --surface-2: #f3f1ea;
  --ink: #0c1116;
  --ink-2: #3a4654;
  --ink-3: #6b7785;
  --rule: #e6e3da;
  --accent: #2a5d4f;
  --accent-coral: #c0593f;
  --accent-halo: #b8893a;
  --font-display: ui-serif, "Source Serif 4", "Source Serif Pro", Georgia, serif;
  --font-sans: ui-sans-serif, system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--bg); color: var(--ink);
  font: 16px/1.5 var(--font-sans);
  -webkit-font-smoothing: antialiased;
}
.auth-shell { min-height: 100vh; display: grid; grid-template-columns: 1.05fr 1fr; }
@media (max-width: 980px) { .auth-shell { grid-template-columns: 1fr; } .auth-aside { display: none; } }

.auth-main {
  display: flex; flex-direction: column;
  padding: 32px 56px; min-height: 100vh;
}
.auth-top { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.auth-brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink);
  font: 600 13px var(--font-mono); letter-spacing: 0.06em; text-transform: uppercase; }
.auth-mark { width: 28px; height: 28px; border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #2a5d4f, #14392f 70%);
  box-shadow: inset 0 0 0 1px rgba(0,0,0,.1), 0 0 0 4px rgba(42,93,79,.06); }
.auth-back { font: 500 12px var(--font-mono); color: var(--ink-3); text-decoration: none; letter-spacing: 0.06em; text-transform: uppercase; }
.auth-back:hover { color: var(--accent); }

.auth-card {
  width: 100%; max-width: 440px; margin: auto 0; display: flex; flex-direction: column; gap: 20px;
}
.auth-eyebrow { font: 500 12px var(--font-mono); letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--accent); margin: 0; }
.auth-title { font: 500 38px/1.1 var(--font-display); letter-spacing: -0.02em; margin: 0; }
.auth-lede { font-size: 15px; color: var(--ink-2); margin: 0; max-width: 40ch; text-wrap: pretty; }

.auth-field { display: flex; flex-direction: column; gap: 6px; }
.auth-label { font: 500 11px var(--font-mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-3); }
.auth-input {
  width: 100%; padding: 12px 14px; border: 1px solid var(--rule); border-radius: 10px;
  background: var(--surface); color: var(--ink); font: 15px var(--font-sans);
  outline: none; transition: border-color 120ms, box-shadow 120ms;
}
.auth-input:focus { border-color: var(--accent); box-shadow: 0 0 0 4px rgba(42,93,79,.12); }
.auth-input::placeholder { color: var(--ink-3); }
.auth-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.auth-link { font: 500 13px var(--font-sans); color: var(--ink-2); text-decoration: none; }
.auth-link:hover { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }

.auth-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 20px; border-radius: 999px; cursor: pointer;
  font: 500 14px/1 var(--font-sans); border: 1px solid transparent; text-decoration: none;
  transition: background-color 120ms, border-color 120ms;
}
.auth-btn--primary { background: var(--ink); color: #fff; }
.auth-btn--primary:hover { background: var(--accent); }
.auth-btn--ghost { background: transparent; color: var(--ink); border-color: var(--rule); }
.auth-btn--ghost:hover { background: var(--surface); border-color: var(--ink-3); }
.auth-btn--block { width: 100%; }

.auth-divider { display: flex; align-items: center; gap: 14px; color: var(--ink-3);
  font: 500 11px var(--font-mono); letter-spacing: 0.12em; text-transform: uppercase; }
.auth-divider::before, .auth-divider::after { content: ""; flex: 1; height: 1px; background: var(--rule); }

.auth-options { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.auth-option {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px; border: 1px solid var(--rule); border-radius: 10px;
  background: var(--surface); color: var(--ink); cursor: pointer;
  font: 500 13px var(--font-sans); text-decoration: none;
  transition: border-color 120ms, background-color 120ms;
}
.auth-option:hover { border-color: var(--ink-3); background: var(--surface-2); }

.auth-foot {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding-top: 32px; border-top: 1px dashed var(--rule); margin-top: 32px;
  font: 500 11px var(--font-mono); letter-spacing: 0.06em; color: var(--ink-3); text-transform: uppercase;
}
.auth-foot a { color: var(--ink-2); text-decoration: none; }
.auth-foot a:hover { color: var(--accent); }

/* RIGHT-SIDE CONTEXT PANEL ────────────────────────────────────────────────── */
.auth-aside {
  position: relative;
  background: linear-gradient(180deg, #f6f4ec 0%, #efece1 100%);
  border-left: 1px solid var(--rule);
  padding: 56px;
  display: flex; flex-direction: column; justify-content: space-between;
  overflow: hidden;
}
.auth-aside::before {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(42,93,79,0.07) 1px, transparent 0);
  background-size: 18px 18px;
  pointer-events: none;
}
.auth-aside > * { position: relative; }
.auth-aside-eyebrow { font: 500 12px var(--font-mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); }
.auth-aside-title { font: 500 38px/1.08 var(--font-display); letter-spacing: -0.02em; color: var(--ink); margin: 12px 0 0; max-width: 14ch; }
.auth-aside-pull {
  margin-top: 32px; padding: 24px; background: rgba(255,255,255,0.5); border: 1px solid var(--rule); border-radius: 14px;
}
.auth-aside-pull p { margin: 0 0 12px; font: 500 22px/1.3 var(--font-display); color: var(--ink); letter-spacing: -0.01em; text-wrap: pretty; }
.auth-aside-pull cite { font: 500 11px var(--font-mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-3); font-style: normal; }
.auth-aside-equation {
  margin-top: 24px; padding: 18px; background: var(--surface); border: 1px solid var(--rule); border-radius: 10px;
  font: italic 16px/1.4 var(--font-display); color: var(--ink-2); text-align: center; letter-spacing: 0.01em;
}
.auth-aside-equation small { display: block; margin-top: 8px; font: 500 10px var(--font-mono); color: var(--ink-3); letter-spacing: 0.12em; text-transform: uppercase; font-style: normal; }
.auth-aside-trust {
  display: flex; flex-wrap: wrap; gap: 18px;
  font: 500 11px var(--font-mono); color: var(--ink-3); letter-spacing: 0.06em; text-transform: uppercase;
}
.auth-aside-trust span { display: inline-flex; align-items: center; gap: 6px; }
.auth-aside-trust span::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }

/* GATED SCREEN — large overlay variant ───────────────────────────────────── */
.gate-shell {
  min-height: 100vh; display: grid; place-items: center; padding: 32px;
  background: radial-gradient(circle at 50% 30%, #ffffff 0%, var(--bg) 60%, #f0ede4 100%);
}
.gate-card {
  max-width: 520px; width: 100%; background: var(--surface);
  border: 1px solid var(--rule); border-radius: 16px;
  padding: 40px; text-align: center;
  box-shadow: 0 24px 60px -30px rgba(12,17,22,.18), 0 4px 12px -8px rgba(12,17,22,.06);
}
.gate-shield {
  width: 56px; height: 56px; margin: 0 auto 16px; border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #2a5d4f, #14392f 70%);
  display: grid; place-items: center;
  box-shadow: 0 0 0 6px rgba(42,93,79,.10);
}
.gate-shield svg { width: 26px; height: 26px; color: #fff; }
.gate-card h1 { font: 500 28px/1.15 var(--font-display); margin: 0 0 8px; letter-spacing: -0.015em; }
.gate-card p { color: var(--ink-2); margin: 0 0 22px; }
.gate-actions { display: flex; flex-direction: column; gap: 10px; }
.gate-meta { margin-top: 22px; padding-top: 18px; border-top: 1px dashed var(--rule);
  display: flex; flex-wrap: wrap; gap: 14px; justify-content: center;
  font: 500 11px var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); }
.gate-meta a { color: var(--ink-2); text-decoration: none; }
.gate-meta a:hover { color: var(--accent); }

/* SHARED FOOTER — full-width footer for marketing pages ──────────────────── */
.ch-footer {
  background: var(--ink);
  color: rgba(255,255,255,0.85);
  padding: 64px 48px 32px;
  font: 14px/1.55 var(--font-sans);
}
.ch-footer-inner {
  max-width: 1280px; margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 56px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.10);
}
@media (max-width: 980px) { .ch-footer-inner { grid-template-columns: 1fr 1fr; gap: 32px; } }
@media (max-width: 600px) { .ch-footer-inner { grid-template-columns: 1fr; } }

.ch-footer-brand { display: flex; flex-direction: column; gap: 16px; max-width: 360px; }
.ch-footer-mark { display: flex; align-items: center; gap: 10px;
  font: 600 13px var(--font-mono); letter-spacing: 0.06em; text-transform: uppercase; color: #fff; text-decoration: none; }
.ch-footer-mark::before {
  content: ""; width: 28px; height: 28px; border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #4d8c7e, #2a5d4f 70%);
}
.ch-footer-tagline { font: italic 16px/1.4 var(--font-display); color: rgba(255,255,255,0.7); margin: 0; }
.ch-footer-equation { font: italic 13px/1.4 var(--font-display); color: rgba(255,255,255,0.55); padding-top: 8px; border-top: 1px solid rgba(255,255,255,0.10); }

.ch-footer-col h3 { font: 500 11px var(--font-mono); letter-spacing: 0.14em; text-transform: uppercase;
  color: rgba(255,255,255,0.6); margin: 0 0 14px; }
.ch-footer-col ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.ch-footer-col a { color: rgba(255,255,255,0.85); text-decoration: none; font-size: 14px;
  transition: color 120ms; }
.ch-footer-col a:hover { color: #fff; }
.ch-footer-col a .new { display: inline-block; margin-left: 6px;
  font: 500 9px var(--font-mono); letter-spacing: 0.1em; padding: 1px 5px; border-radius: 3px;
  background: rgba(184,137,58,0.18); color: #e0b56a; vertical-align: middle; }

.ch-footer-legal {
  max-width: 1280px; margin: 0 auto;
  padding-top: 32px;
  display: flex; flex-wrap: wrap; gap: 16px 24px; justify-content: space-between; align-items: center;
  font: 500 11px var(--font-mono); color: rgba(255,255,255,0.5); letter-spacing: 0.06em;
}
.ch-footer-legal a { color: rgba(255,255,255,0.7); text-decoration: none; }
.ch-footer-legal a:hover { color: #fff; }
.ch-footer-legal-links { display: flex; flex-wrap: wrap; gap: 18px; }
.ch-footer-legal-marks { display: flex; align-items: center; gap: 14px; }
.ch-footer-patent { font-style: italic; opacity: 0.7; }