/* London AI Independent - cubist/faceted design system */

:root {
  --ink: #0a0a0a;
  --paper: #faf7ef;
  --panel: #ffffff;
  --gold: #ddac3e;
  --gold-deep: #a97f1f;
  --red: #e11a24;
  --muted: #6b6558;
  --line: #ded5c0;

  --font-display: 'Unbounded', system-ui, sans-serif;
  --font-body: 'Space Grotesk', system-ui, sans-serif;

  --nav-w: 84px;
  --edge: 14px; /* corner-cut size used across clipped panels */
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; }
img { max-width: 100%; display: block; }
.shell { max-width: 1180px; margin: 0 auto; padding: 0 28px; }

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 200;
  background: var(--gold); color: var(--ink); padding: 12px 18px; font-weight: 700;
}
.skip-link:focus { left: 12px; top: 12px; }

/* ---------- RIGHT-SIDE FACETED NAV RAIL ---------- */
.rail {
  position: fixed; top: 0; right: 0; height: 100vh; width: var(--nav-w);
  background: var(--ink); z-index: 100;
  display: flex; flex-direction: column; align-items: center;
  padding: 22px 0;
  border-left: 3px solid var(--gold);
}
.rail-mark {
  width: 40px; height: 40px; margin-bottom: 30px;
  clip-path: polygon(50% 0%, 100% 35%, 82% 100%, 18% 100%, 0% 35%);
  background: var(--gold);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-weight: 700; color: var(--ink); font-size: 0.85rem;
}
.rail-tabs { display: flex; flex-direction: column; gap: 6px; flex: 1; }
.rail-tab {
  writing-mode: vertical-rl; text-orientation: mixed;
  color: #cfc7b6; text-decoration: none; font-family: var(--font-display);
  font-size: 0.68rem; letter-spacing: 0.14em; text-transform: uppercase;
  padding: 16px 10px; clip-path: polygon(0 10px, 100% 0, 100% calc(100% - 10px), 0 100%);
  transition: background 0.2s, color 0.2s;
}
.rail-tab:hover, .rail-tab.is-active { background: var(--gold); color: var(--ink); }
.rail-tab-cta { background: var(--gold); color: var(--ink); font-weight: 700; }
.rail-tab-cta:hover { background: var(--red); color: var(--paper); }
.rail-burger {
  display: none; position: fixed; top: 16px; right: 16px; z-index: 210;
  width: 48px; height: 48px; background: var(--ink); border: 2px solid var(--gold);
  clip-path: polygon(15% 0, 100% 0, 100% 85%, 85% 100%, 0 100%, 0 15%);
  color: var(--gold); font-size: 1.4rem; align-items: center; justify-content: center;
}
.rail-sub { color: #8f8879; font-size: 0.62rem; writing-mode: vertical-rl; letter-spacing: 0.1em; margin-top: 10px; }

@media (max-width: 880px) {
  .rail { transform: translateX(100%); transition: transform 0.3s ease; width: 220px; align-items: stretch; padding-top: 90px; }
  .rail.is-open { transform: translateX(0); }
  .rail-mark { display: none; }
  .rail-tab { writing-mode: horizontal-tb; text-align: right; clip-path: none; padding: 16px 24px; font-size: 0.78rem; }
  .rail-sub { display: none; }
  .rail-burger { display: flex; }
  :root { --nav-w: 0px; }
}

/* ---------- MAIN OFFSET ---------- */
main { padding-right: var(--nav-w); }

/* ---------- SECTION LABELS ---------- */
.angle-label {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-display); font-size: 0.78rem; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--gold-deep); margin-bottom: 18px;
}
.angle-label .roman {
  background: var(--ink); color: var(--gold); padding: 4px 10px;
  clip-path: polygon(12% 0, 100% 0, 88% 100%, 0 100%);
  font-size: 0.78rem;
}

/* ---------- HERO ---------- */
.hero { position: relative; padding: 74px 0 40px; overflow: hidden; }
.hero-frame {
  position: relative; background: var(--ink);
  clip-path: polygon(0 0, 100% 0, 100% 88%, 92% 100%, 0 100%);
  padding: 46px 40px 64px;
}
.hero-frame::before {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(115deg, transparent 40%, rgba(221,172,62,0.10) 41%, rgba(221,172,62,0.10) 43%, transparent 44%),
    linear-gradient(115deg, transparent 60%, rgba(225,26,36,0.12) 61%, rgba(225,26,36,0.12) 62%, transparent 63%);
  pointer-events: none;
}
.hero-banner { width: 100%; border: 2px solid var(--gold); background: #fff; padding: 10px; }
.hero-banner img { width: 100%; height: auto; }
.hero-title {
  font-family: var(--font-display); color: var(--paper);
  font-size: clamp(2.1rem, 5.6vw, 4.1rem); line-height: 1.02; margin: 34px 0 0; text-transform: uppercase;
}
.hero-title .cut { color: var(--gold); }
.hero-title .cut2 { color: var(--red); }
.hero-sub { color: #cfc7b6; max-width: 620px; font-size: 1.08rem; margin: 20px 0 0; }
.hero-meta {
  display: flex; flex-wrap: wrap; gap: 10px 24px; margin-top: 26px;
  font-family: var(--font-display); font-size: 0.8rem; letter-spacing: 0.08em; color: var(--gold);
  text-transform: uppercase;
}
.hero-cta { margin-top: 30px; display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-block; font-family: var(--font-display); font-size: 0.85rem;
  letter-spacing: 0.06em; text-transform: uppercase; text-decoration: none;
  padding: 15px 26px; border: 2px solid var(--gold);
  clip-path: polygon(0 0, 100% 0, 100% 70%, 88% 100%, 0 100%);
}
.btn-solid { background: var(--gold); color: var(--ink); }
.btn-ghost { background: transparent; color: var(--gold); }
.btn[aria-disabled="true"] { opacity: 0.55; pointer-events: none; border-color: #8f8879; color: #8f8879; }

/* ---------- MANIFESTO (Angle I) ---------- */
.manifesto { padding: 84px 0; position: relative; }
.manifesto-grid { display: grid; grid-template-columns: 1fr; gap: 40px; }
.manifesto-lede {
  font-family: var(--font-display); font-size: clamp(1.5rem, 3vw, 2.1rem);
  line-height: 1.22; max-width: 780px; margin: 0 0 26px;
}
.manifesto-lede .hl { background: var(--gold); padding: 0 6px; box-decoration-break: clone; -webkit-box-decoration-break: clone; }
.manifesto-body { max-width: 680px; color: var(--ink); }
.manifesto-body p { margin: 0 0 20px; }
.manifesto-close {
  font-family: var(--font-display); font-size: 1.15rem; color: var(--red);
  margin-top: 6px; text-transform: uppercase; letter-spacing: 0.02em;
}
.facet-deco {
  position: absolute; right: -60px; top: 40px; width: 260px; height: 260px; opacity: 0.9;
  display: none;
}
@media (min-width: 980px) { .facet-deco { display: block; } .manifesto-body { padding-right: 220px; } }

/* ---------- SHATTER DIVIDER ---------- */
.shatter { display: block; width: 100%; height: 46px; }

/* ---------- AWARDS (Angle II) ---------- */
.awards { padding: 20px 0 90px; background: var(--ink); color: var(--paper); }
.awards .angle-label { color: var(--gold); }
.awards h2 { font-family: var(--font-display); font-size: clamp(1.7rem, 4vw, 2.6rem); margin: 0 0 40px; text-transform: uppercase; }
.award-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 3px; background: #2a2620; }
.shard {
  background: #141210; padding: 30px 26px 28px; position: relative;
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
}
.shard:nth-child(even) {
  clip-path: polygon(18px 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%, 0 18px);
}
.shard .num { font-family: var(--font-display); color: var(--gold); font-size: 0.78rem; letter-spacing: 0.12em; }
.shard h3 { font-family: var(--font-display); font-size: 1.12rem; margin: 10px 0 12px; text-transform: uppercase; line-height: 1.25; }
.shard p { margin: 0; color: #b8b0a0; font-size: 0.92rem; line-height: 1.55; }

/* ---------- RULES (Angle III) ---------- */
.rules { padding: 90px 0; }
.rules h2 { font-family: var(--font-display); font-size: clamp(1.7rem, 4vw, 2.6rem); margin: 0 0 36px; text-transform: uppercase; }
.rules-grid { display: grid; grid-template-columns: 1fr; gap: 0; max-width: 820px; }
.rule-row { display: grid; grid-template-columns: 30px 200px 1fr; gap: 18px; padding: 18px 0; border-bottom: 1px solid var(--line); align-items: start; }
.rule-row .tri { width: 0; height: 0; margin-top: 6px; border-left: 9px solid transparent; border-right: 9px solid transparent; border-bottom: 15px solid var(--red); }
.rule-row .rk { font-family: var(--font-display); font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.04em; padding-top: 2px; }
.rule-row .rv { color: var(--muted); }
@media (max-width: 640px) { .rule-row { grid-template-columns: 22px 1fr; } .rule-row .rk { grid-column: 2; } .rule-row .rv { grid-column: 2; } }

/* ---------- THE NIGHT (Angle IV) ---------- */
.night { padding: 90px 0 100px; background: var(--ink); color: var(--paper); }
.night .angle-label { color: var(--gold); }
.night h2 { font-family: var(--font-display); font-size: clamp(1.7rem, 4vw, 2.6rem); margin: 0 0 36px; text-transform: uppercase; }
.venue-card {
  background: #141210; border: 2px solid var(--gold); padding: 30px 34px; margin-bottom: 28px;
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 22px 100%, 0 calc(100% - 22px));
  max-width: 560px;
}
.venue-date { font-family: var(--font-display); color: var(--gold); font-size: 1.05rem; text-transform: uppercase; margin: 0 0 10px; }
.venue-address { margin: 0; color: #cfc7b6; font-size: 1.02rem; line-height: 1.6; }
.map-frame {
  border: 2px solid var(--gold); max-width: 760px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}
.map-frame iframe { display: block; width: 100%; height: 320px; border: 0; filter: grayscale(0.5) invert(0.92) hue-rotate(180deg) contrast(0.95); }

/* ---------- FOOTER ---------- */
.foot { padding: 50px 0 70px; border-top: 3px solid var(--ink); }
.foot-grid { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 24px; align-items: center; }
.foot-mark { font-family: var(--font-display); text-transform: uppercase; font-size: 0.95rem; letter-spacing: 0.04em; }
.foot-mark b { color: var(--red); }
.foot nav { display: flex; flex-wrap: wrap; gap: 18px; }
.foot nav a { text-decoration: none; font-size: 0.85rem; color: var(--muted); }
.foot nav a:hover { color: var(--ink); }
.foot-note { margin-top: 22px; font-size: 0.82rem; color: var(--muted); }

@media (max-width: 640px) {
  .shell { padding: 0 18px; }
  .hero-frame { padding: 36px 22px 50px; }
}