/* Shared chrome (nav, footer) + content-page styling.
   Loaded on every page; the chat home page also loads style.css on top. */

* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --accent: #4da3ff;
  --ink: #e6edf3;
  --muted: #9fb0c3;
  --line: rgba(255,255,255,.1);
}

html { scroll-behavior: smooth; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--ink);
  background: #0b0e14;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.6;
}
body:not(.home) {
  background: linear-gradient(170deg, #0b0e14, #131a29 60%, #0b0e14);
  background-attachment: fixed;
}

a { color: var(--accent); }

/* ---------- top nav ---------- */
.site-nav {
  position: relative;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .85rem 1.25rem;
  border-bottom: 1px solid var(--line);
  background: rgba(8, 11, 17, .8);
  backdrop-filter: blur(10px);
  flex-wrap: wrap;
}
.site-nav .brand {
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: .02em;
  text-decoration: none;
  color: var(--ink);
}
.site-nav .brand span { color: var(--accent); }
.site-nav nav { display: flex; gap: .35rem; flex-wrap: wrap; }
.site-nav nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: .89rem;
  padding: .34rem .7rem;
  border-radius: 7px;
  transition: all .15s;
}
.site-nav nav a:hover { color: var(--ink); background: rgba(255,255,255,.06); }
.site-nav nav a.active { color: var(--accent); background: color-mix(in srgb, var(--accent) 14%, transparent); }

/* ---------- content pages ---------- */
main.doc {
  position: relative;
  z-index: 2;
  flex: 1;
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 3rem 1.25rem 4rem;
}
main.doc h1 { font-size: 2rem; letter-spacing: -.01em; margin-bottom: .9rem; }
main.doc h2 {
  font-size: 1.12rem;
  margin: 2rem 0 .6rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
  color: #c6d2df;
}
main.doc p { margin-bottom: .9rem; color: #cbd6e2; }
main.doc .lede { font-size: 1.08rem; color: var(--ink); margin-bottom: 1.4rem; }
main.doc ul { margin: 0 0 1rem 1.15rem; display: flex; flex-direction: column; gap: .4rem; color: #cbd6e2; }
main.doc li::marker { color: var(--accent); }
main.doc .muted { color: var(--muted); font-size: .9rem; }
main.doc .cta { margin-top: 2rem; display: flex; gap: .6rem; flex-wrap: wrap; }

.btn {
  display: inline-block;
  background: var(--accent);
  color: #08090d;
  font-weight: 650;
  text-decoration: none;
  padding: .6rem 1.2rem;
  border: 1px solid var(--accent);
  border-radius: 9px;
  font-size: .95rem;
  cursor: pointer;
  font-family: inherit;
}
.btn:hover { filter: brightness(1.1); }
.btn.ghost { background: transparent; color: var(--accent); }
.btn:disabled { opacity: .55; cursor: wait; }

/* ---------- forms ---------- */
.form { display: flex; flex-direction: column; gap: 1rem; margin: 1.6rem 0 2rem; }
.form label { display: flex; flex-direction: column; gap: .35rem; font-size: .9rem; color: #c6d2df; }
.form .req { color: var(--accent); }
.form input, .form textarea {
  background: rgba(255,255,255,.05);
  border: 1px solid var(--line);
  border-radius: 9px;
  color: var(--ink);
  padding: .65rem .8rem;
  font-size: .97rem;
  font-family: inherit;
  outline: none;
  resize: vertical;
}
.form input:focus, .form textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 16%, transparent);
}
.form input::placeholder, .form textarea::placeholder { color: #63748a; }
.form button { align-self: flex-start; }
.form-note { font-size: .88rem; min-height: 1.2em; color: var(--muted); }
.form-note.ok { color: #56d364; }
.form-note.err { color: #ff9d95; }

/* ---------- footer ---------- */
.site-footer {
  position: relative;
  z-index: 5;
  margin-top: auto;
  border-top: 1px solid var(--line);
  background: rgba(8, 11, 17, .85);
  backdrop-filter: blur(10px);
  padding: 1.6rem 1.25rem 2rem;
  text-align: center;
}
.site-footer nav { display: flex; gap: .3rem 1.1rem; justify-content: center; flex-wrap: wrap; margin-bottom: .9rem; }
.site-footer nav a { color: var(--muted); text-decoration: none; font-size: .85rem; }
.site-footer nav a:hover { color: var(--accent); }
.site-footer p {
  max-width: 640px;
  margin: 0 auto;
  font-size: .74rem;
  line-height: 1.6;
  color: #6f7f92;
}

/* ---------- home tweaks ---------- */
body.home { display: block; }
body.home .site-nav { background: rgba(8, 11, 17, .55); border-bottom-color: rgba(255,255,255,.07); }
body.home .site-footer { background: rgba(8, 11, 17, .6); }
.home-blurb { text-align: center; font-size: .86rem; color: var(--muted); }
.home-blurb a { color: color-mix(in srgb, var(--accent) 85%, #fff 15%); }

@media (max-width: 560px) {
  .site-nav { justify-content: center; }
  main.doc { padding-top: 2rem; }
  main.doc h1 { font-size: 1.6rem; }
}