/* ---------- site chrome: header, navigation, footer, shared components ---------- */

/* quiet brand backdrop for reading pages (the homepage replaces it with the live artwork) */
.backdrop { position: fixed; inset: 0; z-index: -1; background: var(--ink-800); overflow: hidden; pointer-events: none; }
.backdrop::before {
  content: ""; position: absolute; inset: -20%;
  background:
    radial-gradient(42% 36% at 82% 8%, color-mix(in srgb, var(--violet) 26%, transparent), transparent 70%),
    radial-gradient(36% 30% at 6% 30%, color-mix(in srgb, var(--pink) 15%, transparent), transparent 72%),
    radial-gradient(48% 40% at 60% 100%, color-mix(in srgb, var(--cyan) 12%, transparent), transparent 70%);
  filter: saturate(0.9);
}
.backdrop::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 0, rgba(10, 10, 20, 0.55) 46rem); }

/* header */
.site-header { position: fixed; inset: 0 0 auto 0; z-index: 50; height: var(--header-h); display: flex; align-items: center; transition: background var(--t-med), border-color var(--t-med), backdrop-filter var(--t-med); border-bottom: 1px solid transparent; padding-top: env(safe-area-inset-top); height: calc(var(--header-h) + env(safe-area-inset-top)); }
.site-header.is-solid { background: rgba(10, 10, 20, 0.76); -webkit-backdrop-filter: blur(18px) saturate(1.3); backdrop-filter: blur(18px) saturate(1.3); border-bottom-color: var(--line); }
.site-header__in { display: flex; align-items: center; gap: var(--s-5); width: min(100% - var(--gutter) * 2, var(--w-wide)); margin-inline: auto; }
.brand { display: inline-flex; align-items: center; gap: 0.6rem; color: var(--text); text-decoration: none; margin-right: auto; padding: 0.35rem 0; }
.brand svg { width: 1.9rem; height: 1.9rem; flex: none; }
.brand__name { font-family: var(--font-display); font-variation-settings: "SOFT" 100, "opsz" 40; font-size: 1.42rem; font-weight: 500; letter-spacing: -0.01em; line-height: 1; }
.brand__ver { font-family: var(--font-display); font-style: italic; font-size: 0.86rem; color: var(--peach); margin-left: 0.1rem; transform: translateY(-0.35em); }
.nav { display: flex; align-items: center; gap: clamp(0.2rem, 1.1vw, 1.1rem); }
.nav a { position: relative; display: block; padding: 0.55rem 0.6rem; color: var(--text-2); text-decoration: none; font-size: 0.95rem; letter-spacing: 0.04em; border-radius: var(--r-1); }
.nav a:hover { color: var(--text); }
.nav a[aria-current="page"] { color: var(--text); }
.nav a[aria-current="page"]::after { content: ""; position: absolute; left: 0.6rem; right: 0.6rem; bottom: 0.2rem; height: 1px; background: linear-gradient(90deg, var(--pink), var(--peach)); }
.console-link { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.42rem 0.5rem 0.42rem 0.95rem; border: 1px solid var(--line-strong); border-radius: var(--r-pill); color: var(--text); text-decoration: none; font-size: 0.9rem; letter-spacing: 0.04em; white-space: nowrap; transition: border-color var(--t-fast), background var(--t-fast); }
.console-link:hover { border-color: var(--text-2); background: rgba(255, 255, 255, 0.05); }
.console-link .tag { margin: 0; }
.menu-btn { display: none; align-items: center; gap: 0.6rem; min-height: 2.75rem; padding: 0 0.3rem 0 0.9rem; border: 1px solid var(--line-strong); border-radius: var(--r-pill); font-size: 0.9rem; letter-spacing: 0.08em; }
.menu-btn i { position: relative; display: block; width: 2.1rem; height: 2.1rem; border-radius: 50%; background: rgba(255, 255, 255, 0.08); }
.menu-btn i::before, .menu-btn i::after { content: ""; position: absolute; left: 0.62rem; right: 0.62rem; height: 1.5px; background: currentColor; top: 0.85rem; }
.menu-btn i::after { top: 1.2rem; }
@media (max-width: 960px) {
  .site-header .nav, .site-header .console-link { display: none; }
  .menu-btn { display: inline-flex; }
}

/* mobile menu: native <dialog> gives focus trapping, inert page and Esc for free */
.menu { width: 100%; max-width: none; height: 100%; max-height: none; margin: 0; padding: 0; border: 0; background: rgba(8, 8, 17, 0.94); color: var(--text); -webkit-backdrop-filter: blur(22px); backdrop-filter: blur(22px); }
.menu::backdrop { background: transparent; }
.menu[open] { display: flex; flex-direction: column; animation: menu-in 380ms var(--ease-out); }
@keyframes menu-in { from { opacity: 0; transform: translateY(-10px); } }
.menu__top { display: flex; align-items: center; justify-content: space-between; height: calc(var(--header-h) + env(safe-area-inset-top)); padding: env(safe-area-inset-top) var(--gutter) 0; flex: none; }
.menu__close { min-height: 2.75rem; padding: 0 1rem; border: 1px solid var(--line-strong); border-radius: var(--r-pill); font-size: 0.9rem; letter-spacing: 0.08em; }
.menu__list { flex: 1; overflow-y: auto; padding: var(--s-5) var(--gutter) calc(var(--s-7) + env(safe-area-inset-bottom)); display: flex; flex-direction: column; }
.menu__list a { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; padding: 0.95rem 0; border-bottom: 1px solid var(--line); color: var(--text); text-decoration: none; font-family: var(--font-serif-tc); font-size: 1.55rem; font-weight: 600; }
.menu__list a span { font-family: var(--font-sans); font-size: 0.8rem; font-weight: 400; color: var(--text-3); letter-spacing: 0.06em; }
.menu__list a[aria-current="page"] { color: var(--peach); }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.6rem; min-height: 3.1rem; padding: 0.7rem 1.55rem; border-radius: var(--r-pill); font-size: 1rem; font-weight: 600; letter-spacing: 0.06em; text-decoration: none; white-space: nowrap; transition: transform var(--t-fast) var(--ease-out), background var(--t-fast), border-color var(--t-fast), box-shadow var(--t-med); }
.btn:active { transform: scale(0.98); }
.btn--solid { background: var(--paper); color: var(--ink-900); box-shadow: 0 0 0 0 rgba(255, 174, 114, 0); }
.btn--solid:hover { background: #fff; box-shadow: 0 10px 40px -10px rgba(255, 174, 114, 0.55); }
.btn--ghost { color: var(--text); border: 1px solid var(--line-strong); background: rgba(16, 16, 29, 0.35); -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); }
.btn--ghost:hover { border-color: var(--text); background: rgba(255, 255, 255, 0.08); }
.btn--small { min-height: 2.5rem; padding: 0.4rem 1.1rem; font-size: 0.9rem; }
.arrow-link { display: inline-flex; align-items: center; gap: 0.5rem; color: var(--text); font-weight: 600; letter-spacing: 0.04em; text-decoration: none; padding: 0.5rem 0; border-bottom: 1px solid var(--line-strong); transition: border-color var(--t-fast), gap var(--t-fast) var(--ease-out); }
.arrow-link:hover { border-color: var(--peach); gap: 0.8rem; }
.arrow-link::after { content: "→"; font-family: var(--font-sans); color: var(--peach); }

/* state vocabulary: LIVE / SNAPSHOT / DEMO / UNKNOWN + lifecycle labels. Never colour alone. */
.tag { display: inline-flex; align-items: center; gap: 0.4rem; padding: 0.16rem 0.62rem; border-radius: var(--r-pill); border: 1px solid var(--line-strong); font-family: var(--font-sans); font-size: 0.74rem; font-weight: 600; letter-spacing: 0.08em; line-height: 1.6; color: var(--text-2); white-space: nowrap; vertical-align: middle; }
.tag::before { content: ""; width: 0.42rem; height: 0.42rem; border-radius: 50%; background: currentColor; flex: none; }
.tag--live { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 45%, transparent); }
.tag--internal { color: #c9b6ff; border-color: color-mix(in srgb, var(--violet) 60%, transparent); }
.tag--candidate, .tag--building { color: var(--cyan); border-color: color-mix(in srgb, var(--cyan) 42%, transparent); }
.tag--recovering, .tag--snapshot { color: var(--gold); border-color: color-mix(in srgb, var(--gold) 42%, transparent); }
.tag--planned, .tag--unknown { color: var(--text-3); }
.tag--planned::before, .tag--unknown::before { background: transparent; box-shadow: inset 0 0 0 1.5px currentColor; }
.tag--concept { color: var(--pink); border-color: color-mix(in srgb, var(--pink) 42%, transparent); }

/* section scaffolding */
.section { position: relative; padding-block: clamp(4.5rem, 11vw, 9rem); }
.section__head { display: grid; gap: var(--s-4); margin-bottom: clamp(2rem, 5vw, 4rem); max-width: 46rem; }
.section__title { font-size: var(--fs-5); font-weight: 700; line-height: 1.16; }
.section__lede { font-size: var(--fs-2); color: var(--text-2); max-width: 38rem; }
.eyebrow { font-family: var(--font-display); font-style: italic; font-variation-settings: "SOFT" 100; font-size: 1.05rem; color: var(--peach); letter-spacing: 0.01em; }
.rule { height: 1px; border: 0; background: linear-gradient(90deg, transparent, var(--line-strong) 18%, var(--line-strong) 82%, transparent); margin: 0; }
.note { font-size: var(--fs-0); color: var(--text-3); line-height: 1.7; }
.panel { border: 1px solid var(--line); border-radius: var(--r-3); background: var(--surface); -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px); box-shadow: var(--shadow-1); }

/* inner-page hero */
.page-hero { padding-top: calc(var(--header-h) + clamp(3.5rem, 9vw, 7.5rem)); padding-bottom: clamp(2.5rem, 6vw, 5rem); }
.page-hero__title { font-size: var(--fs-5); font-weight: 800; line-height: 1.12; max-width: 18em; }
.page-hero__title .latin { font-weight: 400; font-style: italic; color: var(--peach); }
.page-hero__lede { margin-top: var(--s-5); font-size: var(--fs-2); color: var(--text-2); max-width: 40rem; }
.crumbs { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: var(--s-5); font-size: var(--fs-0); color: var(--text-3); letter-spacing: 0.05em; }
.crumbs a { color: var(--text-2); text-decoration: none; }
.crumbs a:hover { color: var(--text); }
.crumbs li + li::before { content: "/"; margin-right: 0.5rem; color: var(--text-3); }

/* state screens: loading / empty / error / offline */
.state { display: grid; justify-items: start; gap: var(--s-3); padding: clamp(1.5rem, 4vw, 2.75rem); border: 1px dashed var(--line-strong); border-radius: var(--r-3); background: rgba(16, 16, 29, 0.5); }
.state__title { font-family: var(--font-serif-tc); font-size: var(--fs-3); font-weight: 700; }
.state p { color: var(--text-2); max-width: 36rem; }
.state--error { border-color: color-mix(in srgb, var(--err) 55%, transparent); }
.spinner { width: 1.4rem; height: 1.4rem; border-radius: 50%; border: 2px solid var(--line-strong); border-top-color: var(--peach); animation: spin 900ms linear infinite; }
@keyframes spin { to { transform: rotate(1turn); } }
.offline-bar { position: fixed; left: 50%; bottom: calc(1rem + env(safe-area-inset-bottom)); transform: translateX(-50%); z-index: 60; padding: 0.55rem 1.1rem; border-radius: var(--r-pill); background: var(--ink-600); border: 1px solid var(--line-strong); font-size: var(--fs-0); box-shadow: var(--shadow-2); }

/* footer */
.site-footer { position: relative; margin-top: clamp(3rem, 8vw, 7rem); border-top: 1px solid var(--line); background: linear-gradient(180deg, rgba(10, 10, 20, 0.6), rgba(6, 6, 13, 0.96)); padding-block: clamp(3rem, 7vw, 5.5rem) calc(2rem + env(safe-area-inset-bottom)); }
.site-footer__grid { display: grid; grid-template-columns: minmax(0, 1.5fr) repeat(3, minmax(0, 1fr)); gap: var(--s-7) var(--s-6); }
.site-footer__claim { font-family: var(--font-serif-tc); font-size: var(--fs-3); font-weight: 700; line-height: 1.5; max-width: 15em; margin-top: var(--s-4); }
.site-footer h2 { font-family: var(--font-sans); font-size: var(--fs-00); font-weight: 600; letter-spacing: 0.18em; color: var(--text-3); margin-bottom: var(--s-4); }
.site-footer ul { display: grid; gap: 0.55rem; }
.site-footer li a { color: var(--text-2); text-decoration: none; }
.site-footer li a:hover { color: var(--text); }
.site-footer li.pending { color: var(--text-3); }
.site-footer__base { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--s-3) var(--s-6); margin-top: var(--s-8); padding-top: var(--s-5); border-top: 1px solid var(--line); font-size: var(--fs-00); color: var(--text-3); letter-spacing: 0.03em; }
@media (max-width: 760px) {
  .site-footer__grid { grid-template-columns: 1fr 1fr; }
  .site-footer__grid > :first-child { grid-column: 1 / -1; }
}