/* ==========================================================
   idatabase — Cyan theme
   ========================================================== */
:root {
  --cyan-50:  #e0f7fa;
  --cyan-100: #b2ebf2;
  --cyan-200: #80deea;
  --cyan-300: #4dd0e1;
  --cyan-400: #26c6da;
  --cyan-500: #00bcd4;
  --cyan-600: #00acc1;
  --cyan-700: #0097a7;
  --cyan-800: #00838f;
  --cyan-900: #006064;
  --banner:      #2079c5;  /* navigation banner colour */
  --banner-dark: #175c99;  /* darker shade for active text / mobile menu */
  --ink:      #0f2a2e;
  --ink-soft: #3d5a5e;
  --paper:    #ffffff;
  --mist:     #f3fbfc;
  --line:     #cfe9ec;
  --shadow:   0 6px 24px rgba(0, 96, 100, 0.10);
  --radius:   14px;
  --max:      1140px;
  --font:     "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --display:  "Space Grotesk", "Inter", system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--mist);
}
img { max-width: 100%; display: block; }
a { color: var(--cyan-800); text-underline-offset: 3px; }
a:hover { color: var(--cyan-900); }
h1, h2, h3 { font-family: var(--display); line-height: 1.2; color: var(--ink); margin: 0 0 .5em; }
h1 { font-size: clamp(2rem, 4.5vw, 3.2rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); letter-spacing: -0.01em; }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 20px; }
.skip-link { position: absolute; left: -999px; top: 0; background: var(--cyan-900); color: #fff; padding: 8px 14px; z-index: 100; }
.skip-link:focus { left: 10px; top: 10px; }

/* ---------- Header & navigation ---------- */
/* Banner colour: change --banner to match the old site's navigation banner */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--banner);
  box-shadow: 0 2px 14px rgba(0, 60, 90, .25);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 78px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: #fff; }
.brand:hover { color: #fff; }
.brand-mark {
  width: 42px; height: 42px; border-radius: 11px;
  background: rgba(255, 255, 255, .18); border: 1px solid rgba(255, 255, 255, .35);
  display: grid; place-items: center; color: #fff;
}
.brand-mark svg { width: 22px; height: 22px; }
.brand-name { font-family: var(--display); font-weight: 700; font-size: 1.45rem; letter-spacing: -0.02em; color: #fff; }

.nav-toggle {
  display: none; background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.4); border-radius: 10px;
  width: 44px; height: 44px; cursor: pointer; color: #fff;
}
.nav-toggle svg { width: 22px; height: 22px; }

.main-nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 6px; }
.main-nav a {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  padding: 7px 14px; border-radius: 12px; min-height: 52px;
  font-weight: 600; font-size: .86rem; line-height: 1.25; text-decoration: none; text-align: center;
  color: #fff; background: rgba(255, 255, 255, .13);
  border: 1px solid rgba(255, 255, 255, .22);
  transition: background .2s, color .2s, transform .15s, box-shadow .2s;
}
.main-nav a svg { width: 17px; height: 17px; flex: none; opacity: .9; }
.nav-label { display: block; text-align: center; white-space: nowrap; }
.main-nav a:hover { background: rgba(255, 255, 255, .26); color: #fff; transform: translateY(-1px); }
.main-nav a[aria-current="page"] {
  background: #fff; color: var(--banner-dark); border-color: #fff;
  box-shadow: 0 4px 14px rgba(0, 40, 70, .25);
}

@media (max-width: 1100px) {
  .nav-toggle { display: grid; place-items: center; }
  .main-nav {
    position: absolute; left: 0; right: 0; top: 100%;
    background: var(--banner-dark);
    box-shadow: var(--shadow);
    max-height: 0; overflow: hidden; transition: max-height .3s ease;
  }
  .main-nav.open { max-height: 520px; }
  .main-nav ul { display: grid; grid-template-columns: repeat(3, 1fr); padding: 14px 16px 18px; gap: 8px; }
  .main-nav a { flex-direction: column; gap: 4px; padding: 10px 6px; min-height: 76px; }
}
@media (max-width: 480px) {
  .main-nav ul { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(1200px 500px at 85% -10%, rgba(77, 208, 225, .55), transparent 60%),
    radial-gradient(800px 400px at -10% 110%, rgba(0, 172, 193, .35), transparent 60%),
    linear-gradient(160deg, var(--cyan-900) 0%, var(--cyan-800) 45%, var(--cyan-600) 100%);
  color: #fff;
  padding: 84px 0 96px;
}
.hero h1, .hero h2 { color: #fff; }
.hero p.lead { font-size: 1.2rem; max-width: 720px; color: rgba(255, 255, 255, .9); }
.hero .eyebrow { color: var(--cyan-100); }
.hero-grid::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, #000 30%, transparent 100%);
}
.hero .container { position: relative; z-index: 1; }
.hero.compact { padding: 56px 0 64px; }

.eyebrow {
  display: inline-block; text-transform: uppercase; letter-spacing: .14em;
  font-size: .78rem; font-weight: 700; color: var(--cyan-700); margin-bottom: 12px;
}

.btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 22px; border-radius: 999px; font-weight: 700; text-decoration: none;
  border: 2px solid transparent; cursor: pointer; font-size: 1rem; font-family: inherit;
  transition: transform .15s, box-shadow .2s, background .2s;
}
.btn:hover { transform: translateY(-2px); }
.btn-light { background: #fff; color: var(--cyan-900); box-shadow: 0 6px 18px rgba(0,0,0,.15); }
.btn-light:hover { color: var(--cyan-900); }
.btn-ghost { border-color: rgba(255,255,255,.7); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,.12); color: #fff; }
.btn-cyan { background: linear-gradient(135deg, var(--cyan-600), var(--cyan-800)); color: #fff; box-shadow: 0 6px 18px rgba(0,131,143,.3); }
.btn-cyan:hover { color: #fff; }
.btn svg { width: 18px; height: 18px; }

/* ---------- Sections ---------- */
section { padding: 72px 0; }
section.alt { background: var(--paper); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { max-width: 760px; margin-bottom: 36px; }
.section-head p { color: var(--ink-soft); font-size: 1.08rem; }

/* ---------- Cards & grids ---------- */
.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); }

.card {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; box-shadow: 0 1px 2px rgba(0,96,100,.04);
  transition: transform .2s, box-shadow .2s, border-color .2s;
  display: flex; flex-direction: column;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--cyan-200); }
.card p { color: var(--ink-soft); margin-bottom: .8em; }
.card .card-link { margin-top: auto; font-weight: 700; text-decoration: none; display: inline-flex; align-items: center; gap: 6px; }
.card .card-link::after { content: "→"; transition: transform .2s; }
.card .card-link:hover::after { transform: translateX(4px); }

.icon-badge {
  width: 48px; height: 48px; border-radius: 12px; margin-bottom: 16px;
  background: var(--cyan-50); color: var(--cyan-800);
  display: grid; place-items: center;
}
.icon-badge svg { width: 26px; height: 26px; }

.tag {
  display: inline-block; font-size: .74rem; font-weight: 700; letter-spacing: .04em;
  padding: 3px 10px; border-radius: 999px; background: var(--cyan-50); color: var(--cyan-900);
  margin: 0 6px 8px 0; border: 1px solid var(--cyan-100);
}
.meta { font-size: .9rem; color: var(--ink-soft); margin-bottom: 10px; }

/* Stats strip */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 18px; margin-top: 48px; }
.stat {
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.22);
  border-radius: var(--radius); padding: 18px 20px;
}
.stat strong { display: block; font-family: var(--display); font-size: 1.7rem; color: #fff; }
.stat span { color: rgba(255,255,255,.85); font-size: .95rem; }

/* Feature list */
.check-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.check-list li { position: relative; padding-left: 34px; }
.check-list li::before {
  content: ""; position: absolute; left: 0; top: 4px; width: 22px; height: 22px; border-radius: 50%;
  background: var(--cyan-600) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12l5 5L20 7'/%3E%3C/svg%3E") center/14px no-repeat;
}

/* Split layout */
.split { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } }
.panel {
  background: linear-gradient(160deg, var(--cyan-50), #fff);
  border: 1px solid var(--cyan-100); border-radius: 20px; padding: 32px;
}

/* ---------- Tabs (Learn page) ---------- */
.tabs { display: inline-flex; gap: 6px; background: var(--paper); border: 1px solid var(--line); padding: 6px; border-radius: 999px; margin-bottom: 30px; flex-wrap: wrap; }
.tab-btn {
  border: 0; background: transparent; padding: 10px 20px; border-radius: 999px; cursor: pointer;
  font: 700 .95rem var(--font); color: var(--cyan-900);
}
.tab-btn[aria-selected="true"] { background: linear-gradient(135deg, var(--cyan-600), var(--cyan-800)); color: #fff; }
.tab-panel[hidden] { display: none; }
@media (max-width: 600px) {
  .tabs { display: flex; width: 100%; border-radius: 16px; }
  .tab-btn { flex: 1 1 auto; border-radius: 12px; padding: 10px 12px; }
}

.link-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.link-item {
  display: grid; grid-template-columns: 52px 1fr; gap: 16px; align-items: start;
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px;
  transition: border-color .2s, box-shadow .2s;
}
.link-item:hover { border-color: var(--cyan-300); box-shadow: var(--shadow); }
.link-item .num {
  width: 52px; height: 52px; border-radius: 12px; display: grid; place-items: center;
  background: var(--cyan-50); color: var(--cyan-800); font-family: var(--display); font-weight: 700;
}
.link-item.yt .num { background: #e6f9fb; color: var(--cyan-800); }
.link-item.yt .num svg { width: 26px; height: 26px; }
.link-item h3 { margin-bottom: 4px; }
.link-item h3 a { text-decoration: none; }
.link-item h3 a:hover { text-decoration: underline; }
.link-item p { margin: 0; color: var(--ink-soft); font-size: .97rem; }
.link-item .url { font-size: .82rem; color: var(--cyan-700); word-break: break-all; }

/* ---------- Toolbar / filters ---------- */
.toolbar { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-bottom: 28px; }
.search {
  flex: 1 1 260px; display: flex; align-items: center; gap: 10px;
  background: var(--paper); border: 1px solid var(--line); border-radius: 999px; padding: 0 18px;
}
.search:focus-within { border-color: var(--cyan-500); box-shadow: 0 0 0 4px rgba(0,188,212,.15); }
.search svg { width: 18px; height: 18px; color: var(--cyan-700); flex: none; }
.search input { border: 0; outline: none; padding: 13px 0; font: inherit; width: 100%; background: transparent; color: var(--ink); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  border: 1px solid var(--cyan-200); background: var(--paper); color: var(--cyan-900);
  padding: 8px 14px; border-radius: 999px; font: 600 .88rem var(--font); cursor: pointer;
}
.chip:hover { background: var(--cyan-50); }
.chip.active { background: var(--cyan-700); border-color: var(--cyan-700); color: #fff; }
.empty { display: none; text-align: center; color: var(--ink-soft); padding: 30px; }
.empty.show { display: block; }

/* ---------- Developer directory ---------- */
.state-block { margin-bottom: 44px; }
.state-head { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; }
.state-code {
  font-family: var(--display); font-weight: 700; font-size: .95rem; color: #fff;
  background: linear-gradient(135deg, var(--cyan-600), var(--cyan-800));
  padding: 6px 12px; border-radius: 10px; letter-spacing: .05em;
}
.state-head h2 { margin: 0; font-size: 1.45rem; }
.state-count { color: var(--ink-soft); font-size: .92rem; margin-left: auto; }
.dev-card h3 { margin-bottom: 2px; }
.dev-card .loc { font-size: .9rem; color: var(--cyan-800); font-weight: 600; margin-bottom: 10px; }
.notice {
  background: var(--cyan-50); border: 1px solid var(--cyan-100); border-left: 5px solid var(--cyan-600);
  border-radius: 12px; padding: 18px 22px; color: var(--ink); margin-bottom: 32px;
}
.notice p:last-child { margin-bottom: 0; }

/* ---------- Database cards ---------- */
.db-card .db-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.db-card .db-num { font-family: var(--display); font-weight: 700; color: var(--cyan-300); font-size: 1.6rem; line-height: 1; }
.db-card .impact { font-size: .93rem; background: var(--mist); border-radius: 10px; padding: 10px 12px; color: var(--ink); margin-bottom: 14px; }
.db-card .impact strong { color: var(--cyan-800); }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 22px; }
.contact-card { text-align: left; }
.contact-card .big { font-family: var(--display); font-size: 1.55rem; font-weight: 700; color: var(--ink); text-decoration: none; word-break: break-word; }
.contact-card .big:hover { color: var(--cyan-800); }
.contact-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.btn-sm { padding: 9px 16px; font-size: .9rem; }
.btn-outline { border-color: var(--cyan-600); color: var(--cyan-800); background: #fff; }
.btn-outline:hover { background: var(--cyan-50); color: var(--cyan-900); }

.form { display: grid; gap: 16px; }
.form label { font-weight: 600; font-size: .95rem; display: block; margin-bottom: 6px; }
.form input, .form textarea, .form select {
  width: 100%; font: inherit; color: var(--ink); padding: 12px 14px;
  border: 1px solid var(--line); border-radius: 10px; background: #fff;
}
.form input:focus, .form textarea:focus, .form select:focus { outline: none; border-color: var(--cyan-500); box-shadow: 0 0 0 4px rgba(0,188,212,.15); }
.form textarea { min-height: 140px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }
.form-note { font-size: .88rem; color: var(--ink-soft); }

.toast {
  position: fixed; left: 50%; bottom: 28px; transform: translate(-50%, 120px);
  background: var(--cyan-900); color: #fff; padding: 12px 20px; border-radius: 999px;
  font-weight: 600; box-shadow: var(--shadow); transition: transform .3s; z-index: 200;
}
.toast.show { transform: translate(-50%, 0); }

/* ---------- Footer ---------- */
.site-footer { background: var(--cyan-900); color: rgba(255,255,255,.85); padding: 52px 0 28px; }
.site-footer a { color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr; } }
.site-footer h4 { color: #fff; font-family: var(--display); margin: 0 0 12px; font-size: 1.05rem; }
.site-footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.site-footer ul a { text-decoration: none; }
.site-footer ul a:hover { text-decoration: underline; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.15); margin-top: 36px; padding-top: 20px; font-size: .85rem; color: rgba(255,255,255,.65); }
.footer-bottom p { margin: 0 0 .5em; }

/* ---------- Back to top ---------- */
.to-top {
  position: fixed; right: 20px; bottom: 20px; width: 46px; height: 46px; border-radius: 50%;
  border: 0; background: var(--cyan-700); color: #fff; cursor: pointer; box-shadow: var(--shadow);
  opacity: 0; pointer-events: none; transition: opacity .25s, transform .25s; transform: translateY(10px);
  display: grid; place-items: center; z-index: 60;
}
.to-top.show { opacity: 1; pointer-events: auto; transform: none; }
.to-top svg { width: 20px; height: 20px; }

/* ---------- Reveal animation ---------- */
.js .reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

:focus-visible { outline: 3px solid var(--cyan-400); outline-offset: 2px; }

/* Heading above search/filter toolbars */
.toolbar-title { font-family: var(--display); font-weight: 700; font-size: 1.15rem; margin: 0 0 12px; color: var(--ink); }

/* ---------- History timeline ---------- */
.timeline { list-style: none; margin: 0; padding: 0; position: relative; max-width: 860px; }
.timeline::before {
  content: ""; position: absolute; left: 118px; top: 8px; bottom: 8px; width: 3px; border-radius: 3px;
  background: linear-gradient(var(--banner), var(--cyan-300));
}
.timeline li { display: grid; grid-template-columns: 100px 1fr; gap: 40px; margin-bottom: 22px; position: relative; }
.timeline li::before {
  content: ""; position: absolute; left: 111px; top: 18px; width: 17px; height: 17px; border-radius: 50%;
  background: #fff; border: 4px solid var(--banner);
}
.t-year { font-family: var(--display); font-weight: 700; font-size: 1.2rem; color: var(--banner-dark); text-align: right; padding-top: 10px; }
.t-body { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 22px; }
.t-body h3 { margin-bottom: 4px; }
.t-body p { margin: 0; color: var(--ink-soft); }
@media (max-width: 640px) {
  .timeline::before { left: 8px; }
  .timeline li { grid-template-columns: 1fr; gap: 6px; padding-left: 34px; }
  .timeline li::before { left: 1px; top: 6px; }
  .t-year { text-align: left; padding-top: 0; }
}