/*
Theme Name: Keswick
Theme URI: https://keswick.tech
Author: Keswick Technologies
Description: AI data company theme, site-wide passphrase gate. Deep blue system, Instrument Serif / IBM Plex Mono / Inter, passphrase-gated Advanced page.
Version: 3.0
Text Domain: keswick
*/

:root {
  --bg: #ece1cd;
  --bg-2: #e2d5bc;
  --panel: #f6efe2;
  --line: rgba(180, 83, 9, 0.14);
  --ink: #2a2115;
  --ink-dim: #6f6252;
  --cyan: #b45309;
  --cyan-dim: rgba(180, 83, 9, 0.55);
  --serif: "Instrument Serif", "Noto Serif SC", serif;
  --mono: "IBM Plex Mono", monospace;
  --sans: "Inter", "Noto Sans SC", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* Language mirror: body carries lang-en or lang-zh */
.lang-en .zh { display: none !important; }
.lang-zh .en { display: none !important; }
.lang-zh { font-family: "Noto Sans SC", var(--sans); }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(236, 225, 205, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand {
  font-family: var(--mono); font-size: 14px; letter-spacing: 0.14em;
  color: var(--ink); text-decoration: none; text-transform: uppercase;
}
.brand b { color: var(--cyan); font-weight: 500; }
.nav { display: flex; gap: 26px; align-items: center; }
.nav a {
  font-family: var(--mono); font-size: 12.5px; letter-spacing: 0.08em;
  color: var(--ink-dim); text-decoration: none; text-transform: uppercase;
}
.nav a:hover, .nav a.current { color: var(--cyan); }
.nav a.gated::before { content: "\25C6\00a0"; color: var(--cyan-dim); font-size: 9px; vertical-align: 2px; }

.lang-switch {
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em;
  border: 1px solid var(--line); border-radius: 3px;
  background: transparent; color: var(--ink-dim);
  padding: 5px 12px; cursor: pointer;
}
.lang-switch:hover { color: var(--cyan); border-color: var(--cyan-dim); }

/* ---------- Type ---------- */
h1, h2, h3 { font-family: var(--serif); font-weight: 400; }
h1 { font-size: clamp(40px, 6vw, 68px); line-height: 1.08; }
h2 { font-size: clamp(28px, 4vw, 40px); line-height: 1.15; }
h3 { font-size: 22px; }
h1 em, h2 em { font-style: italic; color: var(--cyan); }
.label {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--cyan);
  display: block; margin-bottom: 18px;
}
.dim { color: var(--ink-dim); }
.lede { font-size: 19px; color: var(--ink-dim); max-width: 640px; }

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; padding: 110px 0 90px; border-bottom: 1px solid var(--line); }
#topology { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0.5; }
.hero .wrap { position: relative; z-index: 2; }
.hero h1 { max-width: 820px; margin-bottom: 26px; }
.hero .lede { margin-bottom: 38px; }

.btn {
  display: inline-block; font-family: var(--mono); font-size: 13px;
  letter-spacing: 0.1em; text-transform: uppercase; text-decoration: none;
  padding: 13px 26px; border-radius: 3px; cursor: pointer;
}
.btn-solid { background: var(--cyan); color: #f2e9d8; border: 1px solid var(--cyan); }
.btn-solid:hover { background: #8a3c06; }
.btn-ghost { color: var(--cyan); border: 1px solid var(--cyan-dim); background: transparent; margin-left: 12px; }
.btn-ghost:hover { border-color: var(--cyan); }

/* ---------- Sections ---------- */
.section { padding: 90px 0; border-bottom: 1px solid var(--line); }
.section-head { max-width: 720px; margin-bottom: 52px; }

/* Lifecycle */
.lifecycle { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; }
.stage {
  border: 1px solid var(--line); border-radius: 4px; padding: 20px 14px;
  background: linear-gradient(180deg, var(--panel), transparent);
}
.stage .num { font-family: var(--mono); font-size: 10.5px; color: var(--cyan-dim); letter-spacing: 0.15em; }
.stage .name { font-family: var(--serif); font-size: 21px; margin-top: 8px; }
.stage .alt { font-family: var(--mono); font-size: 11px; color: var(--ink-dim); margin-top: 4px; letter-spacing: 0.1em; }

/* Cards */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; }
.card {
  border: 1px solid var(--line); border-radius: 5px; padding: 30px 26px;
  background: linear-gradient(160deg, var(--panel), rgba(246, 239, 226, 0.25));
}
.card h3 { margin-bottom: 12px; }
.card p { font-size: 15.5px; color: var(--ink-dim); }
.card .tag { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.18em; color: var(--cyan); text-transform: uppercase; display: block; margin-bottom: 14px; }

/* Advanced teaser */
.restricted {
  border: 1px solid var(--cyan-dim); border-radius: 6px;
  padding: 48px 44px; position: relative;
  background:
    repeating-linear-gradient(-45deg, transparent 0 14px, rgba(180, 83, 9, 0.03) 14px 15px),
    var(--panel);
}
.restricted h2 { margin-bottom: 14px; }
.restricted p { max-width: 580px; color: var(--ink-dim); }
.restricted .btn { margin-top: 28px; }

/* ---------- Gate ---------- */
.gate { min-height: 55vh; display: flex; align-items: center; }
.gate-box { max-width: 460px; margin: 0 auto; text-align: center; padding: 56px 0; }
.gate-box input[type="password"] {
  width: 100%; margin: 26px 0 14px; padding: 14px 16px;
  font-family: var(--mono); font-size: 15px; letter-spacing: 0.2em;
  background: var(--bg-2); border: 1px solid var(--line); border-radius: 4px;
  color: var(--ink); text-align: center; outline: none;
}
.gate-box input:focus { border-color: var(--cyan-dim); }
.gate-error { font-family: var(--mono); font-size: 12px; color: #ff7b7b; margin-top: 12px; }

/* ---------- Resources ---------- */
.res-list { border-top: 1px solid var(--line); }
.res-item {
  display: grid; grid-template-columns: 170px 1fr; gap: 28px;
  padding: 26px 0; border-bottom: 1px solid var(--line);
}
.res-item .meta { font-family: var(--mono); font-size: 11.5px; color: var(--cyan-dim); letter-spacing: 0.12em; text-transform: uppercase; padding-top: 5px; }
.res-item h3 { margin-bottom: 6px; }
.res-item p { color: var(--ink-dim); font-size: 15.5px; max-width: 660px; }

/* ---------- Footer ---------- */
.site-footer { padding: 56px 0; }
.site-footer .wrap { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 16px; }
.site-footer, .site-footer a { font-family: var(--mono); font-size: 12px; color: var(--ink-dim); letter-spacing: 0.08em; }
.site-footer a { text-decoration: none; }
.site-footer a:hover { color: var(--cyan); }

/* ---------- Contact ---------- */
.contact-email { font-family: var(--serif); font-size: clamp(26px, 4vw, 44px); color: var(--cyan); text-decoration: none; }
.contact-email:hover { text-decoration: underline; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .lifecycle { grid-template-columns: repeat(3, 1fr); }
  .grid, .grid-2 { grid-template-columns: 1fr; }
  .grid-2 { gap: 18px; }
  .nav { gap: 14px; }
  .nav a { font-size: 11px; }
}
@media (max-width: 620px) {
  .lifecycle { grid-template-columns: repeat(2, 1fr); }
  .res-item { grid-template-columns: 1fr; gap: 6px; }
  .hero { padding: 70px 0 60px; }
}

/* ---------- Doors ---------- */
a.door { display: block; text-decoration: none; color: inherit; transition: border-color 0.15s; }
a.door:hover { border-color: var(--cyan-dim); }
.door-cta {
  display: block; margin-top: 18px;
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--cyan);
}