/* IronMath site. Colours, radii and type weights mirror src/theme in the app. */
:root {
  --bg: #050506;
  --surface: #151417;
  --raised: #1D1C20;
  --card: #242226;
  --border: rgba(250, 250, 250, 0.09);
  --border-strong: rgba(250, 250, 250, 0.16);
  --text: #F7F6F4;
  --muted: #A6A3A8;
  --dim: #8C8990;
  --accent: #E0AD79;
  --accent-soft: rgba(224, 173, 121, 0.16);
  --accent-text: #1C1410;
  --danger: #FF6B5E;
  --success: #4ADE80;
  --r-sm: 12px;
  --r-md: 16px;
  --r-lg: 22px;
  --r-xl: 28px;
  --max: 1160px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Inter", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--accent); color: var(--accent-text); padding: 8px 14px; border-radius: 999px; font-weight: 800; z-index: 50; }
.skip:focus { left: 12px; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
@media (max-width: 600px) { .wrap { padding: 0 16px; } }

/* Nav */
.nav { position: sticky; top: 0; z-index: 20; background: rgba(5, 5, 6, 0.78); backdrop-filter: saturate(160%) blur(18px); -webkit-backdrop-filter: saturate(160%) blur(18px); border-bottom: 1px solid var(--border); }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 800; font-size: 18px; letter-spacing: -0.2px; }
.brand:hover { text-decoration: none; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.nav-links { display: flex; align-items: center; gap: 26px; }
.nav-links a { color: var(--muted); font-size: 15px; font-weight: 600; }
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-links a.pill-link { color: var(--accent-text); }


/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 52px; padding: 0 24px; border-radius: 999px; font-weight: 800; font-size: 16px; border: 1px solid transparent; cursor: pointer; font-family: inherit; }
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--accent); color: var(--accent-text); }
.btn-primary:hover { background: #EBBE8F; }
.btn-ghost { background: var(--surface); color: var(--text); border-color: var(--border-strong); }
.btn-ghost:hover { background: var(--raised); }
.btn-sm { min-height: 38px; padding: 0 16px; font-size: 14px; }

/* Hero */
.hero { position: relative; padding: 72px 0 88px; overflow: hidden; }
.hero::before { content: ""; position: absolute; inset: -20% -10% auto; height: 760px; background: radial-gradient(closest-side at 70% 45%, rgba(224, 173, 121, 0.22), transparent 70%), radial-gradient(closest-side at 15% 20%, rgba(224, 173, 121, 0.08), transparent 70%); pointer-events: none; }
.hero .wrap { position: relative; display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); gap: 56px; align-items: center; }
.hero-icon { width: 96px; height: 96px; border-radius: 22px; box-shadow: 0 0 0 1px var(--border-strong), 0 18px 50px rgba(224, 173, 121, 0.25); margin-bottom: 28px; }
.status { display: inline-flex; align-items: center; gap: 8px; padding: 7px 14px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); font-size: 13px; font-weight: 800; letter-spacing: 0.6px; text-transform: uppercase; }
.status::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px var(--accent); }
h1 { font-size: clamp(44px, 7vw, 76px); line-height: 1.02; letter-spacing: -2.4px; font-weight: 800; margin: 18px 0 18px; }
h1 .accent { color: var(--accent); }
.lede { font-size: clamp(18px, 2.1vw, 21px); color: var(--muted); max-width: 34em; margin: 0 0 32px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; }
.fine { color: var(--dim); font-size: 14px; margin-top: 18px; }

/* Section chrome */
section { padding: 96px 0; }
.kicker { color: var(--accent); font-size: 13px; font-weight: 800; letter-spacing: 0.9px; text-transform: uppercase; margin: 0 0 12px; }
h2 { font-size: clamp(32px, 4.4vw, 50px); line-height: 1.06; letter-spacing: -1.4px; font-weight: 800; margin: 0 0 16px; }
h3 { font-size: 20px; letter-spacing: -0.3px; font-weight: 800; margin: 0 0 8px; }
.section-lede { color: var(--muted); font-size: 19px; max-width: 40em; margin: 0 0 48px; }
.divider { border-top: 1px solid var(--border); }

/* Phone illustration */
.phone-col { display: flex; flex-direction: column; align-items: center; gap: 12px; }
.phone { width: 340px; max-width: 100%; border-radius: 48px; padding: 12px; background: linear-gradient(160deg, #2A282C, #111013); box-shadow: 0 0 0 1px var(--border-strong), 0 40px 80px rgba(0, 0, 0, 0.6), 0 0 90px rgba(224, 173, 121, 0.12); }
.screen { position: relative; border-radius: 38px; background: var(--bg); overflow: hidden; padding: 50px 18px 92px; min-height: 640px; }
.screen::before { content: ""; position: absolute; top: 12px; left: 50%; transform: translateX(-50%); width: 108px; height: 30px; border-radius: 20px; background: #000; }
.screen::after { content: ""; position: absolute; top: -140px; right: -120px; width: 320px; height: 320px; border-radius: 50%; background: radial-gradient(closest-side, rgba(224, 173, 121, 0.22), transparent); pointer-events: none; }
.s-title { font-size: 32px; font-weight: 800; letter-spacing: -0.8px; margin: 6px 0 0; line-height: 1.1; }
.s-sub { color: var(--muted); font-size: 14px; font-weight: 600; margin: 0 0 16px; }
.s-kicker { color: var(--muted); font-size: 11px; font-weight: 800; letter-spacing: 0.6px; text-transform: uppercase; }
.s-head { display: flex; justify-content: space-between; align-items: center; }
.seg { display: inline-flex; background: var(--card); border-radius: 999px; padding: 3px; }
.seg span, .seg button { font: inherit; font-size: 12px; font-weight: 800; padding: 5px 14px; border-radius: 999px; color: var(--muted); background: none; border: 0; }
.seg .on { background: var(--accent); color: var(--accent-text); }
.s-row { display: flex; align-items: center; gap: 8px; margin: 2px 0 12px; }
.s-num { flex: 1; font-size: 46px; font-weight: 800; letter-spacing: -1.6px; line-height: 1.1; }
.s-bump { width: 42px; height: 42px; border-radius: 50%; background: var(--card); display: grid; place-items: center; font-size: 22px; font-weight: 700; }
.s-answer { background: var(--surface); border: 1px solid var(--border); border-radius: 24px; padding: 14px 16px; margin-bottom: 12px; }
.s-answer .k { color: var(--accent); font-size: 11px; font-weight: 800; letter-spacing: 0.6px; text-transform: uppercase; }
.s-answer .v { color: var(--accent); font-size: 36px; font-weight: 800; letter-spacing: -1.2px; line-height: 1.15; }
.s-answer .o { color: var(--muted); font-size: 13px; font-weight: 600; }
.s-answer .x { color: var(--success); font-size: 13px; font-weight: 800; }
.s-log { background: var(--accent); color: var(--accent-text); border-radius: 999px; text-align: center; font-weight: 800; font-size: 15px; padding: 13px; margin-top: 12px; }
.s-quick { display: flex; gap: 8px; margin-top: 8px; }
.s-quick span { flex: 1; text-align: center; border: 1px solid var(--border); background: var(--surface); border-radius: 999px; padding: 9px; font-size: 13px; font-weight: 700; }
.tabbar { position: absolute; left: 14px; right: 14px; bottom: 14px; height: 60px; border-radius: 999px; background: rgba(36, 34, 38, 0.82); border: 1px solid var(--border-strong); display: flex; justify-content: space-around; align-items: center; backdrop-filter: blur(12px); }
.tabbar span { font-size: 10px; font-weight: 700; color: var(--muted); display: flex; flex-direction: column; align-items: center; gap: 3px; }
.tabbar svg { width: 20px; height: 20px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.tabbar .on { color: var(--accent); }
.illus { color: var(--dim); font-size: 12px; font-weight: 700; letter-spacing: 0.6px; text-transform: uppercase; }

/* Barbell sleeve */
.bar-stage { background: var(--surface); border: 1px solid var(--border); border-radius: 24px; height: 128px; display: flex; align-items: center; justify-content: center; overflow: hidden; position: relative; }
.bar-stage.big { height: 170px; border-radius: var(--r-xl); }
.barbell { display: flex; align-items: center; flex: none; }
.bb-side { display: flex; align-items: center; gap: 2px; }
.bb-side.left { flex-direction: row-reverse; }
.bb-tip { width: 14px; height: 14px; background: linear-gradient(#D4D4D8, #71717A); border-radius: 3px; }
.bb-collar { width: 8px; height: 26px; background: linear-gradient(#E4E4E7, #71717A); border-radius: 3px; }
.bb-shaft { width: 90px; height: 8px; background: repeating-linear-gradient(90deg, #A1A1AA 0 2px, #71717A 2px 4px); border-radius: 2px; }
.bb-sleeve-empty { width: 60px; height: 14px; background: linear-gradient(#D4D4D8, #71717A); border-radius: 3px; }
.plate { display: grid; place-items: center; border-radius: 6px; border: 2px solid; font-weight: 800; font-size: 11px; letter-spacing: -0.2px; }
.plate span { writing-mode: vertical-rl; transform: rotate(180deg); }
.plate.wide span { writing-mode: horizontal-tb; transform: none; }

/* Calculator */
.calc { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 20px; align-items: start; }
.panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-xl); padding: 26px; }
.field-label { display: block; color: var(--muted); font-size: 12px; font-weight: 800; letter-spacing: 0.6px; text-transform: uppercase; margin: 0 0 10px; }
.field + .field { margin-top: 24px; }
.target-row { display: flex; align-items: center; gap: 10px; }
.target-input { flex: 1; min-width: 0; font: inherit; font-size: 56px; font-weight: 800; letter-spacing: -1.8px; color: var(--text); background: transparent; border: 0; border-bottom: 2px solid var(--border-strong); padding: 0 0 4px; border-radius: 0; }
.target-input:focus { outline: none; border-bottom-color: var(--accent); }
.round-btn { flex: none; width: 50px; height: 50px; border-radius: 50%; background: var(--card); color: var(--text); border: 0; font: inherit; font-size: 24px; font-weight: 700; cursor: pointer; }
.round-btn:hover { background: #2E2B30; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { font: inherit; font-size: 14px; font-weight: 700; color: var(--text); background: var(--card); border: 1px solid transparent; border-radius: 999px; padding: 8px 14px; cursor: pointer; }
.chip:hover { border-color: var(--border-strong); }
.chip[aria-pressed="true"] { background: var(--accent-soft); color: var(--accent); border-color: rgba(224, 173, 121, 0.5); }
.seg.big { padding: 4px; }
.seg.big button { font-size: 14px; padding: 8px 20px; cursor: pointer; }
.answer { background: var(--raised); border: 1px solid var(--border); border-radius: var(--r-xl); padding: 22px 22px 20px; margin-bottom: 14px; }
.answer .k { color: var(--accent); font-size: 13px; font-weight: 800; letter-spacing: 0.6px; text-transform: uppercase; }
.answer .v { color: var(--accent); font-size: clamp(40px, 5vw, 54px); font-weight: 800; letter-spacing: -1.6px; line-height: 1.1; font-variant-numeric: tabular-nums; }
.answer .o { color: var(--muted); font-size: 16px; font-weight: 600; }
.answer .x { font-size: 16px; font-weight: 800; margin-top: 4px; }
.x.ok { color: var(--success); }
.x.miss { color: var(--danger); }
.nearby { display: flex; gap: 10px; margin-bottom: 14px; }
.near { flex: 1; text-align: left; background: var(--card); border: 1px solid transparent; border-radius: var(--r-lg); padding: 12px 14px; cursor: pointer; font: inherit; color: var(--text); }
.near:hover { border-color: var(--border-strong); }
.near small { display: block; color: var(--dim); font-size: 11px; font-weight: 800; letter-spacing: 0.5px; text-transform: uppercase; }
.near b { font-size: 18px; font-weight: 800; }
.each { color: var(--muted); font-weight: 700; font-size: 15px; text-align: center; margin: 12px 0 0; }
.calc-note { color: var(--dim); font-size: 14px; margin: 18px 0 0; }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; counter-reset: step; }
.step { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-xl); padding: 28px; }
.step .n { width: 38px; height: 38px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); display: grid; place-items: center; font-weight: 800; margin-bottom: 18px; }
.step p { color: var(--muted); margin: 0; }

/* Tabs grid */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-xl); padding: 26px; }
.card p { color: var(--muted); margin: 0; font-size: 16px; }
.card .ic { width: 44px; height: 44px; border-radius: 14px; background: var(--accent-soft); display: grid; place-items: center; margin-bottom: 18px; }
.card .ic svg { width: 22px; height: 22px; stroke: var(--accent); fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.tag { display: inline-block; font-size: 11px; font-weight: 800; letter-spacing: 0.6px; text-transform: uppercase; color: var(--accent); margin-bottom: 6px; }

/* Split feature rows */
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 56px; align-items: center; }
.split + .split { margin-top: 96px; }
.list { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 14px; }
.list li { display: flex; gap: 12px; color: var(--muted); }
.list li::before { content: ""; flex: none; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); margin-top: 10px; }
.list b { color: var(--text); }

/* Warm-up panel */
.ladder { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-xl); padding: 22px; }
.ladder-head { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 14px; gap: 12px; }
.ladder-head b { font-size: 20px; font-weight: 800; }
.rung { display: grid; grid-template-columns: 56px 1fr auto; gap: 4px 12px; align-items: baseline; padding: 12px 0; border-top: 1px solid var(--border); }
.rung .pct { color: var(--accent); font-weight: 800; font-size: 14px; }
.rung .w { font-weight: 800; font-size: 18px; }
.rung .reps { color: var(--muted); font-weight: 700; font-size: 14px; text-align: right; }
.rung .hint { grid-column: 2 / 4; color: var(--dim); font-size: 13px; }
.rung.top .w { color: var(--accent); }

/* Tools list */
.tools { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.tool { display: flex; gap: 14px; align-items: flex-start; background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-lg); padding: 18px 20px; }
.tool b { display: block; font-size: 17px; }
.tool span { color: var(--muted); font-size: 15px; display: block; line-height: 1.45; margin-top: 2px; }
.tool .dot { flex: none; width: 10px; height: 10px; border-radius: 50%; background: var(--accent); margin-top: 8px; box-shadow: 0 0 12px rgba(224, 173, 121, 0.6); }

/* Bias */
.bias { display: grid; grid-template-columns: 1fr; gap: 10px; margin-top: 24px; }
.bias div { background: var(--card); border-radius: var(--r-lg); padding: 16px 18px; }
.bias b { display: block; }
.bias span { color: var(--muted); font-size: 15px; display: block; }

/* Closing */
.closing { text-align: center; position: relative; overflow: hidden; }
.closing::before { content: ""; position: absolute; left: 50%; top: 50%; width: 900px; height: 600px; transform: translate(-50%, -50%); background: radial-gradient(closest-side, rgba(224, 173, 121, 0.16), transparent); pointer-events: none; }
.closing .wrap { position: relative; }
.closing img { width: 88px; height: 88px; border-radius: 20px; margin: 0 auto 24px; box-shadow: 0 0 0 1px var(--border-strong), 0 18px 50px rgba(224, 173, 121, 0.25); }
.closing .cta-row { justify-content: center; }
.closing .section-lede { margin-left: auto; margin-right: auto; }

/* Footer */
footer { border-top: 1px solid var(--border); padding: 36px 0 48px; color: var(--dim); font-size: 15px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 16px 28px; justify-content: space-between; align-items: center; }
footer nav { display: flex; flex-wrap: wrap; gap: 22px; }
footer a { color: var(--muted); }
footer a:hover { color: var(--text); }

/* Doc pages */
.doc { max-width: 760px; margin: 0 auto; padding: 64px 24px 96px; }
.doc h1 { font-size: clamp(38px, 6vw, 56px); letter-spacing: -1.6px; margin: 0 0 8px; }
.doc .updated { color: var(--dim); font-size: 15px; margin: 0 0 40px; }
.doc h2 { font-size: 24px; letter-spacing: -0.4px; margin: 44px 0 10px; }
.doc p, .doc li { color: #CFCCD1; }
.doc ul { padding-left: 22px; }
.doc li { margin: 6px 0; }
.faq details { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-lg); padding: 18px 22px; margin: 12px 0; }
.faq summary { cursor: pointer; font-weight: 800; font-size: 17px; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--accent); font-size: 22px; line-height: 1; }
.faq details[open] summary::after { content: "−"; }
.faq details p { margin: 12px 0 0; }
.contact-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-xl); padding: 26px; margin: 8px 0 32px; }
.contact-card p { margin: 0 0 16px; }

/* 404 */
.notfound { min-height: 70vh; display: grid; place-items: center; text-align: center; padding: 64px 16px; }
.notfound .big { font-size: clamp(80px, 16vw, 140px); font-weight: 800; letter-spacing: -4px; color: var(--accent); line-height: 1; }

/* Responsive */
@media (max-width: 980px) {
  .hero .wrap, .split, .calc { grid-template-columns: minmax(0, 1fr); }
  .hero { padding: 48px 0 64px; }
  .hero .wrap { gap: 48px; }
  .grid { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr; }
  .split .visual { order: 2; }
}
@media (max-width: 640px) {
  section { padding: 72px 0; }
  .grid, .tools, .bias { grid-template-columns: 1fr; }
  .hero-icon { width: 80px; height: 80px; border-radius: 18px; }
  h1 { letter-spacing: -1.6px; }
  .panel { padding: 20px; }
  .target-input { font-size: 46px; }
  .split + .split { margin-top: 72px; }
  .cta-row .btn { flex: 1 1 auto; }
}
@media (max-width: 380px) {
  .phone { width: 100%; }
}

/* Phone menu */
.menu-btn { display: none; width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--border-strong); background: var(--surface); color: var(--text); cursor: pointer; align-items: center; justify-content: center; padding: 0; }
.menu-btn svg { width: 20px; height: 20px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; }
.menu-btn[aria-expanded="true"] { background: var(--accent-soft); color: var(--accent); border-color: rgba(224, 173, 121, 0.5); }
.menu-panel { position: absolute; left: 12px; right: 12px; top: 70px; background: #151417; border: 1px solid var(--border-strong); border-radius: var(--r-xl); padding: 10px; box-shadow: 0 30px 60px rgba(0, 0, 0, 0.6); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); }
.menu-panel a:not(.btn) { display: block; padding: 14px 16px; border-radius: var(--r-md); color: var(--text); font-weight: 700; font-size: 17px; }
.menu-panel a:not(.btn):hover { background: var(--card); text-decoration: none; }
.menu-panel .btn { width: 100%; margin-top: 8px; }
@media (max-width: 760px) {
  .menu-btn { display: inline-flex; }
  .nav-links { display: none; }
}
@media (min-width: 761px) { .menu-panel { display: none !important; } }

/* Jump button */
.jump { position: fixed; right: calc(16px + env(safe-area-inset-right)); bottom: calc(18px + env(safe-area-inset-bottom)); z-index: 30; width: 48px; height: 48px; border-radius: 50%; border: 1px solid rgba(224, 173, 121, 0.45); background: rgba(29, 28, 32, 0.92); color: var(--accent); display: grid; place-items: center; cursor: pointer; box-shadow: 0 10px 24px rgba(0, 0, 0, 0.5), 0 0 20px rgba(224, 173, 121, 0.18); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); opacity: 0; visibility: hidden; transform: translateY(10px); transition: opacity .2s, transform .2s, visibility 0s .2s; padding: 0; }
.jump.show { opacity: 1; visibility: visible; transform: none; transition: opacity .2s, transform .2s; }
.jump svg { width: 22px; height: 22px; stroke: currentColor; fill: none; stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }
.jump:hover { background: var(--card); }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .jump, .jump.show { transition: none; transform: none; }
}