/* Level Up Logic — leveluplogic.co.uk
   Direction: technical catalogue. Warm paper, black ink, one signal orange.
   Swiss grid, hairline rules, monospace labels, numbered index. */
:root {
  --paper: #f1eee6;
  --paper-2: #e8e4d9;
  --ink: #141414;
  --ink-2: #3b3a36;
  --muted: #5f5c54;
  --rule: #141414;
  --rule-soft: #c9c4b6;
  --signal: #ff4f00;
  --signal-ink: #c23a00;
  --wrap: 1240px;
  --sans: "Helvetica Neue", Helvetica, "Inter", "Segoe UI", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Mono", Menlo, Consolas, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 64px; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
p { margin: 0; }
h1, h2, h3 { margin: 0; font-weight: 700; letter-spacing: -0.035em; line-height: 0.95; }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; }
::selection { background: var(--signal); color: var(--paper); }

.wrap { width: min(var(--wrap), 100% - 40px); margin-inline: auto; }
.mono { font-family: var(--mono); font-size: 12.5px; letter-spacing: 0.04em; text-transform: uppercase; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: var(--paper); padding: 8px 14px; z-index: 50; }
.skip:focus { left: 8px; }

/* masthead */
.mast { position: sticky; top: 0; z-index: 30; background: var(--paper); border-bottom: 1px solid var(--rule); }
.mast .wrap { display: grid; grid-template-columns: 1fr auto; align-items: center; height: 56px; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 700; font-size: 16px; letter-spacing: -0.01em; white-space: nowrap; }
.brand svg { width: 24px; height: 24px; flex: none; }
.mast nav { display: flex; align-items: center; gap: 2px; }
.mast nav a { text-decoration: none; padding: 10px 12px; color: var(--ink-2); }
.mast nav a:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 4px; }
.mast nav a.cta { background: var(--ink); color: var(--paper); margin-left: 8px; }
.mast nav a.cta:hover { background: var(--signal); color: var(--ink); text-decoration: none; }

/* hero */
.hero { padding: 40px 0 0; border-bottom: 1px solid var(--rule); }
.hero-meta { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; color: var(--muted); padding-bottom: 28px; }
.hero h1 { font-size: clamp(3.4rem, 11.5vw, 10.5rem); letter-spacing: -0.055em; line-height: 0.86; }
.hero h1 .arrow { color: var(--signal); font-weight: 400; letter-spacing: 0; margin-right: 0.12em; }
.hero-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 24px; margin-top: 44px; border-top: 1px solid var(--rule); }
.hero-grid > * { padding: 22px 0 40px; }
.hero-lede { grid-column: 1 / span 6; font-size: clamp(1.15rem, 1.7vw, 1.4rem); line-height: 1.4; letter-spacing: -0.01em; color: var(--ink-2); }
.hero-lede strong { color: var(--ink); font-weight: 600; }
.hero-actions { grid-column: 8 / span 5; display: flex; flex-direction: column; gap: 10px; }

/* buttons */
.btn {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  min-height: 52px; padding: 0 18px;
  border: 1px solid var(--ink); text-decoration: none; font-weight: 600; font-size: 16px;
  transition: background 0.18s, color 0.18s;
  cursor: pointer;
}
.btn::after { content: "\2192"; font-family: var(--mono); }
.btn-ink { background: var(--ink); color: var(--paper); }
.btn-ink:hover { background: var(--signal); color: var(--ink); border-color: var(--signal); }
.btn-line { color: var(--ink); }
.btn-line:hover { background: var(--ink); color: var(--paper); }
.btn.ext::after { content: "\2197"; }

/* stats strip */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); border-bottom: 1px solid var(--rule); }
.stats div { padding: 22px 20px 26px; border-left: 1px solid var(--rule); }
.stats div:first-child { border-left: 0; padding-left: 0; }
.stats dt { color: var(--muted); }
.stats dd { margin: 10px 0 0; font-size: clamp(1.8rem, 3.4vw, 2.8rem); font-weight: 700; letter-spacing: -0.04em; line-height: 1; }
.stats dd small { font-size: 0.45em; letter-spacing: -0.01em; font-weight: 500; color: var(--ink-2); }

/* sections */
section { padding: 96px 0; }
.sec-head { display: grid; grid-template-columns: repeat(12, 1fr); gap: 24px; align-items: end; padding-bottom: 28px; border-bottom: 1px solid var(--rule); margin-bottom: 0; }
.sec-head .num { grid-column: 1 / span 2; color: var(--signal-ink); }
.sec-head h2 { grid-column: 3 / span 6; font-size: clamp(2.4rem, 5.4vw, 4.6rem); }
.sec-head p { grid-column: 9 / span 4; color: var(--ink-2); }

/* product index */
.index { width: 100%; border-collapse: collapse; }
.index th { text-align: left; font-weight: 400; color: var(--muted); padding: 14px 12px 12px 0; border-bottom: 1px solid var(--rule); }
.index td { padding: 0; border-bottom: 1px solid var(--rule-soft); vertical-align: middle; }
.index tr:last-child td { border-bottom: 1px solid var(--rule); }
.index a { display: block; padding: 20px 12px 20px 0; text-decoration: none; }
.index .n { width: 64px; color: var(--muted); }
.index .name a { font-size: clamp(1.4rem, 2.6vw, 2.1rem); font-weight: 700; letter-spacing: -0.035em; line-height: 1; }
.index .what { color: var(--ink-2); }
.index .go { width: 56px; text-align: right; font-family: var(--mono); font-size: 20px; }
.index tbody tr { transition: background 0.15s; }
.index tbody tr:hover { background: var(--paper-2); }
.index tbody tr:hover .go a { color: var(--signal-ink); }
.live { display: inline-flex; align-items: center; gap: 7px; }
.live::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--signal); }

/* figures */
.figs { display: grid; grid-template-columns: repeat(12, 1fr); gap: 48px 24px; margin-top: 64px; }
.fig { grid-column: span 6; margin: 0; }
.fig.wide { grid-column: 1 / -1; }
.fig a { display: block; text-decoration: none; }
.fig .frame { border: 1px solid var(--ink); background: var(--ink); overflow: hidden; aspect-ratio: 1200 / 753; }
.fig .frame img { width: 100%; height: 100%; object-fit: cover; object-position: top; transition: transform 0.4s ease; }
.fig a:hover .frame img { transform: scale(1.02); }
.fig.wide .frame { aspect-ratio: 1200 / 600; }
figcaption { display: grid; grid-template-columns: auto 1fr auto; gap: 6px 16px; padding-top: 14px; align-items: baseline; }
figcaption .mono { color: var(--muted); }
figcaption b { font-size: 1.15rem; letter-spacing: -0.02em; }
figcaption span:last-child { grid-column: 2 / -1; color: var(--ink-2); font-size: 15.5px; }
figcaption .src { grid-column: 3; grid-row: 1; }
figcaption .src a { text-decoration: underline; text-underline-offset: 3px; }

/* services */
.services { display: grid; grid-template-columns: repeat(3, 1fr); }
.service { padding: 32px 28px 36px 0; border-right: 1px solid var(--rule); }
.service + .service { padding-left: 28px; }
.service:last-child { border-right: 0; padding-right: 0; }
.service .big { font-size: clamp(3.5rem, 6vw, 5.5rem); font-weight: 700; letter-spacing: -0.06em; line-height: 0.9; color: var(--signal); }
.service h3 { font-size: 1.55rem; letter-spacing: -0.03em; line-height: 1.05; margin-top: 22px; }
.service p { color: var(--ink-2); margin-top: 12px; }
.service ul { list-style: none; margin: 20px 0 0; padding: 0; border-top: 1px solid var(--rule-soft); }
.service li { padding: 10px 0; border-bottom: 1px solid var(--rule-soft); font-size: 15.5px; }

.process { display: grid; grid-template-columns: repeat(12, 1fr); gap: 24px; margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--rule); }
.process h3 { grid-column: 1 / span 3; font-size: 1.4rem; letter-spacing: -0.03em; }
.process ol { grid-column: 4 / -1; list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; counter-reset: s; }
.process li { counter-increment: s; }
.process li::before { content: "Step 0" counter(s); display: block; font-family: var(--mono); font-size: 12.5px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--signal-ink); margin-bottom: 8px; }
.process li b { display: block; font-size: 1.1rem; letter-spacing: -0.02em; }
.process li span { display: block; color: var(--ink-2); margin-top: 4px; font-size: 15.5px; }

/* background (ink section) */
.dark { background: var(--ink); color: var(--paper); }
.dark .sec-head { border-color: #3a3a3a; }
.dark .sec-head .num { color: var(--signal); }
.dark .sec-head p { color: #b9b4a8; }
.timeline { list-style: none; margin: 0; padding: 0; }
.timeline li { display: grid; grid-template-columns: repeat(12, 1fr); gap: 24px; padding: 22px 0; border-bottom: 1px solid #3a3a3a; align-items: baseline; }
.timeline .yr { grid-column: 1 / span 2; color: var(--signal); }
.timeline b { grid-column: 3 / span 4; font-size: 1.3rem; letter-spacing: -0.025em; line-height: 1.15; }
.timeline span { grid-column: 7 / -1; color: #b9b4a8; }
.timeline li.now b { color: var(--signal); }
.creds { display: grid; grid-template-columns: repeat(12, 1fr); gap: 24px; margin-top: 56px; }
.creds h3 { grid-column: 1 / span 2; font-family: var(--mono); font-size: 12.5px; font-weight: 400; letter-spacing: 0.04em; text-transform: uppercase; color: #b9b4a8; line-height: 1.4; }
.creds ul { grid-column: 3 / -1; list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 10px; }
.creds li { border: 1px solid #4a4a4a; padding: 8px 14px; font-size: 15px; }
.quote { display: grid; grid-template-columns: repeat(12, 1fr); gap: 24px; margin-top: 72px; }
.quote blockquote { grid-column: 3 / span 9; margin: 0; font-size: clamp(1.6rem, 3.4vw, 2.8rem); font-weight: 600; letter-spacing: -0.035em; line-height: 1.08; }
.quote blockquote::before { content: "\201C"; color: var(--signal); }
.quote blockquote::after { content: "\201D"; color: var(--signal); }
.quote cite { grid-column: 3 / span 9; font-style: normal; color: #b9b4a8; }
.links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 56px; padding-top: 24px; border-top: 1px solid #3a3a3a; }
.links .btn { border-color: var(--paper); color: var(--paper); min-width: 200px; }
.links .btn:hover { background: var(--paper); color: var(--ink); }

/* contact */
.contact { padding: 96px 0 72px; }
.contact .mono { color: var(--signal-ink); }
.contact h2 { font-size: clamp(2.6rem, 7vw, 6rem); letter-spacing: -0.05em; margin-top: 18px; max-width: 14ch; }
.contact p { color: var(--ink-2); margin-top: 22px; max-width: 52ch; font-size: 1.15rem; }
.mailto { display: inline-block; margin-top: 40px; font-size: clamp(1.5rem, 5.4vw, 4.4rem); font-weight: 700; letter-spacing: -0.045em; line-height: 1; text-decoration: none; border-bottom: 4px solid var(--signal); padding-bottom: 6px; word-break: break-word; transition: color 0.18s; }
.mailto:hover { color: var(--signal-ink); }

/* footer */
footer { border-top: 1px solid var(--rule); padding: 28px 0 40px; font-size: 14.5px; color: var(--ink-2); }
footer .wrap { display: grid; grid-template-columns: repeat(12, 1fr); gap: 24px; }
footer .co { grid-column: 1 / span 7; }
footer .co b { color: var(--ink); }
footer address { font-style: normal; margin-top: 6px; }
footer nav { grid-column: 8 / -1; display: flex; flex-wrap: wrap; gap: 4px 20px; justify-content: flex-end; align-content: start; }
footer nav a { text-decoration: none; padding: 6px 0; }
footer nav a:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }

/* legal page */
.legal { padding: 64px 0 96px; }
.legal .wrap { max-width: 760px; }
.legal h1 { font-size: clamp(2.8rem, 7vw, 4.8rem); letter-spacing: -0.05em; }
.legal h2 { font-size: 1.4rem; letter-spacing: -0.025em; margin-top: 44px; padding-top: 16px; border-top: 1px solid var(--rule); line-height: 1.1; }
.legal p, .legal ul { color: var(--ink-2); margin-top: 14px; }
.legal a { color: var(--signal-ink); }
.legal .updated { color: var(--muted); margin-top: 16px; }

@media (max-width: 960px) {
  .hero-lede, .hero-actions { grid-column: 1 / -1; }
  .hero-actions { padding-top: 0 !important; }
  .sec-head .num, .sec-head h2, .sec-head p { grid-column: 1 / -1; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stats div:nth-child(3) { border-left: 0; padding-left: 0; }
  .stats div:nth-child(n+3) { border-top: 1px solid var(--rule); }
  .fig { grid-column: 1 / -1; }
  .services { grid-template-columns: 1fr; }
  .service, .service + .service { padding: 32px 0; border-right: 0; border-bottom: 1px solid var(--rule); }
  .service:last-child { border-bottom: 0; }
  .process h3, .process ol { grid-column: 1 / -1; }
  .timeline .yr, .timeline b, .timeline span { grid-column: 1 / -1; }
  .timeline li { gap: 6px; }
  .creds h3, .creds ul, .quote blockquote, .quote cite { grid-column: 1 / -1; }
  footer .co, footer nav { grid-column: 1 / -1; justify-content: flex-start; }
}
@media (max-width: 640px) {
  section { padding: 64px 0; }
  .mast nav a:not(.cta) { display: none; }
  .index .what, .index th.what, .index .plat, .index th.plat { display: none; }
  .index .n { width: 44px; }
  .process ol { grid-template-columns: 1fr; }
  .hero-meta span:nth-child(n+3) { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}