/* Public pages (landing + sign in). Dark archive with a warm lamp-light accent. */
:root {
  --bg: #0d0f12;
  --surface: #15181d;
  --text: #ebe7df;
  --muted: #a39d92;
  --accent: #f2b84b;
  --accent-ink: #1c1405;
  --border: #2a2d33;
  --danger: #f2756b;
  --radius: 12px;
  --font-ui: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --font-text: "Source Serif 4", Georgia, serif;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f6f3ec;
    --surface: #fffdf8;
    --text: #1d1a15;
    --muted: #6b645a;
    --accent: #a8690a;
    --accent-ink: #ffffff;
    --border: #e2dccf;
    --danger: #b42318;
    color-scheme: light;
  }
}
:root[data-theme="light"] {
  --bg: #f6f3ec; --surface: #fffdf8; --text: #1d1a15; --muted: #6b645a; --accent: #a8690a;
  --accent-ink: #ffffff; --border: #e2dccf; --danger: #b42318; color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: var(--font-ui); line-height: 1.6; background: var(--bg); color: var(--text); }
a { color: var(--accent); }
h1, h2 { font-family: var(--font-text); font-weight: 600; }

.site-header, main, .site-footer { max-width: 1040px; margin: 0 auto; padding: 0 16px; }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-top: 18px; padding-bottom: 18px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; font-size: 1.1rem; color: var(--text); text-decoration: none; }
nav { display: flex; align-items: center; gap: 18px; }
nav a { color: var(--muted); text-decoration: none; font-size: 0.95rem; }
nav a:hover { color: var(--text); }

.hero { padding: 88px 0 64px; text-align: center; background: radial-gradient(ellipse at 50% 0%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 65%); }
.eyebrow { margin: 0 0 12px; color: var(--accent); font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; font-size: 0.78rem; }
h1 { margin: 0; font-size: clamp(2.4rem, 7vw, 4.4rem); line-height: 1.05; letter-spacing: -0.02em; text-wrap: balance; }
.lead { max-width: 600px; margin: 20px auto 0; color: var(--muted); font-size: 1.12rem; }
.actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; margin-top: 32px; }

.button { display: inline-block; padding: 11px 22px; border: 1px solid var(--border); border-radius: 999px; color: var(--text); background: transparent; text-decoration: none; font: inherit; font-weight: 600; cursor: pointer; }
.button:hover { border-color: var(--muted); }
.button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.button.primary:hover { filter: brightness(1.06); }
nav a.button.small { padding: 6px 16px; color: var(--text); }

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; padding: 24px 0 32px; }
.features article { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.features h2 { margin: 10px 0 6px; font-size: 1.3rem; }
.features p { margin: 0; color: var(--muted); }
.step { display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; border: 1px solid var(--accent); color: var(--accent); font-weight: 600; font-size: 0.85rem; }

.note { max-width: 680px; padding: 40px 0 56px; }
.note h2 { margin: 0 0 8px; font-size: 1.5rem; }
.note p { color: var(--muted); margin: 0; }

.site-footer { border-top: 1px solid var(--border); padding-top: 22px; padding-bottom: 36px; color: var(--muted); font-size: 0.9rem; }

/* Sign in */
.auth { min-height: calc(100vh - 140px); display: grid; place-items: center; padding: 24px 0 48px; }
.card { width: 100%; max-width: 380px; background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 28px 24px 24px; }
.card h1 { font-size: 1.7rem; text-align: center; }
.card .sub { text-align: center; color: var(--muted); margin: 6px 0 22px; font-size: 0.95rem; }
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.field label { font-size: 0.85rem; font-weight: 600; }
.field input { font: inherit; color: var(--text); background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px; }
.field input:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: transparent; }
.check { display: flex; align-items: center; gap: 8px; font-size: 0.9rem; color: var(--muted); margin: 4px 0 18px; }
.card .button { width: 100%; }
.msg { border-radius: 8px; padding: 9px 12px; font-size: 0.9rem; margin: 0 0 16px; }
.msg.error { background: color-mix(in srgb, var(--danger) 14%, transparent); color: var(--danger); }
.msg.info { background: color-mix(in srgb, var(--accent) 14%, transparent); color: var(--text); }
.fine { text-align: center; color: var(--muted); font-size: 0.82rem; margin: 16px 0 0; }

@media (max-width: 520px) {
  nav { gap: 12px; }
  nav a:not(.button) { display: none; }
  .hero { padding: 56px 0 44px; }
}