/* officialbbt.org — design system
   Palette: warm neutrals, saffron accent, ink/indigo text. Serif headings, sans body. */
:root {
  --cream: #faf7f1;
  --surface: #ffffff;
  --ink: #232c40;
  --ink-soft: #4a5469;
  --indigo: #2b3a55;
  --saffron: #c97f10;
  --saffron-deep: #a96a0a;
  --line: #e7e0d2;
  --ok: #2e6b3f;
  --err: #9c3328;
  --serif: Georgia, 'Times New Roman', serif;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --maxw: 1080px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--cream); color: var(--ink);
  font-family: var(--sans); font-size: 17px; line-height: 1.7;
}
h1, h2, h3 { font-family: var(--serif); color: var(--indigo); line-height: 1.25; }
h1 { font-size: 2.3rem; margin: 0 0 .6em; }
h2 { font-size: 1.6rem; margin: 1.8em 0 .5em; }
h3 { font-size: 1.2rem; margin: 1.4em 0 .4em; }
p { margin: 0 0 1em; }
a { color: var(--saffron-deep); }
a:hover { color: var(--saffron); }
img { max-width: 100%; }

.draft-banner {
  background: #fdf0d7; color: #6b4a08; border-bottom: 1px solid #ecd9ae;
  text-align: center; font-size: .85rem; padding: .4rem .8rem;
}

/* Header */
.site-header { background: var(--surface); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 50; }
.nav { max-width: var(--maxw); margin: 0 auto; padding: .7rem 1.2rem; display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: .55rem; text-decoration: none; color: var(--indigo); font-family: var(--serif); font-size: 1.12rem; }
.brand strong { color: var(--saffron-deep); }
.brand-seal { display: inline-grid; place-items: center; width: 2rem; height: 2rem; border-radius: 50%; background: var(--indigo); color: #e0a93e; font-size: 1.1rem; }
.nav-toggle { display: none; margin-left: auto; background: none; border: 1px solid var(--line); border-radius: 6px; padding: .35rem .8rem; font: inherit; color: var(--ink); }
.nav-links { display: flex; gap: .2rem; list-style: none; margin: 0 0 0 auto; padding: 0; flex-wrap: wrap; }
.nav-links a { text-decoration: none; color: var(--ink-soft); padding: .45rem .65rem; border-radius: 6px; font-size: .93rem; }
.nav-links a:hover { background: var(--cream); color: var(--indigo); }
.nav-links a[aria-current="page"] { color: var(--saffron-deep); font-weight: 600; }
@media (max-width: 920px) {
  .nav-toggle { display: block; }
  .nav-links { display: none; width: 100%; flex-direction: column; }
  .nav-links.open { display: flex; }
}

/* Sections */
.section { max-width: var(--maxw); margin: 0 auto; padding: 2.6rem 1.2rem; }
.section.narrow { max-width: 800px; }
.hero { background: linear-gradient(180deg, #fff 0%, var(--cream) 100%); border-bottom: 1px solid var(--line); }
.hero .section { padding: 4rem 1.2rem 3.4rem; text-align: center; }
.hero h1 { font-size: 2.7rem; max-width: 21ch; margin: 0 auto .5em; }
.hero .lede { font-size: 1.18rem; color: var(--ink-soft); max-width: 58ch; margin: 0 auto 1.6em; }
.cta-row { display: flex; gap: .8rem; justify-content: center; flex-wrap: wrap; }
.btn { display: inline-block; padding: .7rem 1.4rem; border-radius: 8px; text-decoration: none; font-weight: 600; font-size: .97rem; border: 1px solid transparent; }
.btn.primary { background: var(--saffron-deep); color: #fff; }
.btn.primary:hover { background: var(--saffron); color: #fff; }
.btn.secondary { background: transparent; color: var(--indigo); border-color: var(--indigo); }
.btn.secondary:hover { background: var(--indigo); color: #fff; }

/* Cards */
.cards { display: grid; gap: 1.1rem; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); margin: 1.4rem 0; padding: 0; list-style: none; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 1.4rem 1.4rem 1.2rem; }
.card h3 { margin-top: 0; }
.card .kicker { font-size: .78rem; letter-spacing: .08em; text-transform: uppercase; color: var(--saffron-deep); font-weight: 700; }

/* Quote block */
.quote { border-left: 4px solid var(--saffron); background: var(--surface); padding: 1.1rem 1.4rem; margin: 1.6rem 0; border-radius: 0 10px 10px 0; }
.quote p { font-family: var(--serif); font-size: 1.08rem; font-style: italic; margin-bottom: .4em; }
.quote cite { font-style: normal; font-size: .88rem; color: var(--ink-soft); }

/* Timeline */
.timeline { list-style: none; margin: 2rem 0; padding: 0; border-left: 2px solid var(--line); }
.timeline li { position: relative; padding: 0 0 1.8rem 1.6rem; }
.timeline li::before { content: ''; position: absolute; left: -7px; top: .45em; width: 12px; height: 12px; border-radius: 50%; background: var(--saffron); border: 2px solid var(--cream); }
.timeline .year { font-family: var(--serif); font-weight: 700; color: var(--indigo); font-size: 1.05rem; display: block; }
.timeline .src { font-size: .85rem; color: var(--ink-soft); }

/* Book grid */
.books { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); margin: 1.5rem 0; padding: 0; list-style: none; }
.book { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 1.1rem 1.2rem; }
.book h3 { margin: 0 0 .25em; font-size: 1.04rem; }
.book p { font-size: .88rem; color: var(--ink-soft); margin: 0; }

/* Forms */
.form { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 1.6rem; margin: 1.6rem 0; }
.form-grid { display: grid; gap: 1rem; grid-template-columns: 1fr 1fr; }
.form-grid .full { grid-column: 1 / -1; }
@media (max-width: 640px) { .form-grid { grid-template-columns: 1fr; } }
label { display: block; font-size: .9rem; font-weight: 600; color: var(--indigo); margin-bottom: .3rem; }
input, select, textarea {
  width: 100%; padding: .6rem .7rem; border: 1px solid #d8d0bf; border-radius: 7px;
  font: inherit; color: var(--ink); background: #fffdf9;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--saffron); outline-offset: 1px; }
textarea { min-height: 110px; resize: vertical; }
.consent { display: flex; gap: .6rem; align-items: flex-start; font-size: .88rem; color: var(--ink-soft); }
.consent input { width: auto; margin-top: .3rem; }
.consent label { font-weight: 400; color: var(--ink-soft); }
.form-status { min-height: 1.4em; font-size: .92rem; margin-top: .8rem; }
.form-status.ok { color: var(--ok); font-weight: 600; }
.form-status.err { color: var(--err); font-weight: 600; }
.hp { position: absolute; left: -9999px; opacity: 0; height: 0; overflow: hidden; }

/* Notice */
.notice { background: #f2eee3; border: 1px solid var(--line); border-radius: 10px; padding: 1rem 1.3rem; font-size: .92rem; color: var(--ink-soft); margin: 1.5rem 0; }

/* Footer */
.site-footer { background: var(--indigo); color: #cfd6e4; margin-top: 3rem; padding: 2.6rem 1.2rem 1.6rem; }
.footer-grid { max-width: var(--maxw); margin: 0 auto; display: grid; gap: 2rem; grid-template-columns: 2fr 1fr 1fr 1fr; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.footer-brand { font-family: var(--serif); font-size: 1.15rem; color: #fff; margin: 0 0 .4em; }
.footer-note { font-size: .88rem; }
.footer-head { font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; color: #e0a93e; font-weight: 700; margin: 0 0 .5em; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: .35em; }
.site-footer a { color: #cfd6e4; text-decoration: none; font-size: .92rem; }
.site-footer a:hover { color: #fff; text-decoration: underline; }
.footer-disclaimer, .footer-copy { max-width: var(--maxw); margin: 1.6rem auto 0; font-size: .8rem; color: #9aa6bd; border-top: 1px solid #3d4d6d; padding-top: 1.2rem; }
.footer-copy { border: 0; padding-top: 0; margin-top: .6rem; }