/* DirtRecon: dark, hi-vis, built for dirt */
:root {
  --bg: hsl(75 8% 6%);
  --bg-2: hsl(75 6% 9%);
  --surface: hsl(75 6% 11%);
  --surface-2: hsl(75 6% 14%);
  --fg: hsl(45 20% 93%);
  --muted: hsl(45 8% 66%);
  --faint: hsl(45 6% 45%);
  --border: hsl(45 8% 100% / 0.1);
  --border-strong: hsl(45 8% 100% / 0.22);
  --accent: hsl(22 100% 52%);
  --sand: hsl(42 26% 86%);
  --accent-hover: hsl(28 100% 58%);
  --on-accent: hsl(75 10% 6%);

  --font-display: 'Big Shoulders Display', 'Arial Narrow', system-ui, sans-serif;
  --font-body: 'General Sans', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  --text-sm: clamp(0.875rem, 0.85rem + 0.1vw, 0.9375rem);
  --text-base: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1.05rem + 0.35vw, 1.3125rem);
  --text-xl: clamp(1.5rem, 1.3rem + 0.9vw, 2rem);
  --text-2xl: clamp(2.5rem, 1.8rem + 3vw, 4.25rem);
  --text-hero: clamp(3.1rem, 1.3rem + 5.6vw, 6.75rem);

  --section: clamp(4.5rem, 3rem + 6vw, 8.5rem);
  --slant: clamp(28px, 4vw, 64px);
  --cut: 12px;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; -webkit-text-size-adjust: 100%; background: var(--bg); }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition: none !important; animation: none !important; } }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font-family: var(--font-body); font-size: var(--text-base); line-height: 1.6;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
/* Grit */
body::after {
  content: ''; position: fixed; inset: 0; pointer-events: none; z-index: 200; opacity: 0.07; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
img { display: block; max-width: 100%; }
h1, h2, h3 { margin: 0; font-family: var(--font-display); font-weight: 900; line-height: 0.95; text-transform: uppercase; letter-spacing: 0.005em; text-wrap: balance; }
p { margin: 0; text-wrap: pretty; }
a { color: inherit; }
::selection { background: var(--accent); color: var(--on-accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.wrap { width: min(1220px, 100% - 2.5rem); margin-inline: auto; }
.skip { position: absolute; left: -999px; top: 0.5rem; background: var(--accent); color: var(--on-accent); padding: 0.5rem 1rem; z-index: 300; font-weight: 700; }
.skip:focus { left: 0.5rem; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Buttons: angled cut corners */
.btn {
  --c: var(--cut);
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  min-height: 52px; padding: 0.8rem 1.7rem; border: 0; cursor: pointer; text-decoration: none;
  font: 800 1.2rem/1 var(--font-display); text-transform: uppercase; letter-spacing: 0.06em;
  clip-path: polygon(var(--c) 0, 100% 0, 100% calc(100% - var(--c)), calc(100% - var(--c)) 100%, 0 100%, 0 var(--c));
  transition: background 0.15s, color 0.15s, transform 0.15s;
}
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--accent); color: var(--on-accent); }
.btn--primary:hover { background: var(--accent-hover); }
.btn--ghost, .btn--outline { background: hsl(45 20% 93% / 0.1); color: var(--fg); box-shadow: inset 0 0 0 2px var(--border-strong); }
.btn--ghost:hover, .btn--outline:hover { background: hsl(45 20% 93% / 0.18); }
.btn--sm { min-height: 42px; padding: 0.5rem 1.1rem; font-size: 1.05rem; --c: 9px; white-space: nowrap; }
.btn--block { width: 100%; }

/* Header */
.header { position: fixed; inset: 0 0 auto; z-index: 50; transition: background 0.25s, box-shadow 0.25s; }
.header--scrolled { background: hsl(75 8% 6% / 0.88); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); box-shadow: 0 1px 0 var(--border), 0 3px 0 -1px var(--accent); }
.header__row { display: flex; align-items: center; gap: 1.5rem; height: 70px; }
.logo { display: inline-flex; align-items: center; gap: 0.55rem; text-decoration: none; color: var(--fg); }
.logo__mark { width: 32px; height: 38px; flex: none; }
.logo__word { font: 800 1.8rem/1 var(--font-display); letter-spacing: 0.04em; color: var(--sand); white-space: pre; }
.logo__word span { color: var(--accent); }
.logo__word--sm { font-size: 1.4rem; }
.nav { display: flex; gap: 1.6rem; margin-left: auto; }
.nav a { text-decoration: none; font: 800 1.05rem/1 var(--font-display); text-transform: uppercase; letter-spacing: 0.07em; color: hsl(45 20% 93% / 0.85); padding: 0.4rem 0; border-bottom: 2px solid transparent; transition: color 0.15s, border-color 0.15s; }
.nav a:hover { color: var(--fg); border-bottom-color: var(--accent); }
.header__actions { display: flex; align-items: center; gap: 0.6rem; }
@media (max-width: 940px) { .nav { display: none; } .header__actions { margin-left: auto; } }

/* Hero */
.hero { position: relative; min-height: min(100svh, 960px); display: flex; align-items: flex-end; overflow: hidden; color: var(--fg); }
.hero__img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 10% 60%; filter: contrast(1.08) saturate(0.9); }
@media (min-width: 861px) { .hero__img { width: 110%; object-position: 0% 15%; } }
@media (max-width: 860px) { .hero__img { object-position: 62% 50%; } }
.hero__shade {
  position: absolute; inset: 0;
  background:
    linear-gradient(90deg, hsl(75 10% 4% / 0.85) 0%, hsl(75 10% 4% / 0.45) 55%, hsl(75 10% 4% / 0.15) 100%),
    linear-gradient(180deg, hsl(75 10% 4% / 0.55) 0%, transparent 25%, transparent 55%, hsl(75 10% 4% / 0.95) 100%);
}
.hero__inner { position: relative; padding: 9rem 0 clamp(3.5rem, 7vw, 6rem); }
.hero__title { font-size: var(--text-hero); max-width: none; line-height: 0.86; letter-spacing: -0.005em; }
.hero__title span { color: var(--accent); }
.hero__sub { margin-top: 1.6rem; max-width: 54ch; font-size: var(--text-lg); color: hsl(45 20% 90%); }
.hero__cta { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 2.2rem; }

/* Hazard tape */
.hazard {
  height: 14px;
  background: repeating-linear-gradient(-45deg, var(--accent) 0 18px, var(--bg) 18px 36px);
}

/* Type helpers */
.eyebrow { display: inline-flex; align-items: center; gap: 0.6rem; font: 700 0.76rem/1 var(--font-mono); letter-spacing: 0.18em; text-transform: uppercase; color: var(--accent); margin-bottom: 1.1rem; }
.eyebrow::before { content: ''; width: 26px; height: 3px; background: var(--accent); transform: skewX(-30deg); }
.eyebrow--light { color: var(--accent); }
.h2 { font-size: var(--text-2xl); max-width: 18ch; }
.lead { font-size: var(--text-lg); color: var(--muted); max-width: 52ch; margin-top: 1.1rem; }

/* Sections */
.section { padding-block: var(--section); position: relative; }
.section--tint { background: var(--bg-2); }
.slant { clip-path: polygon(0 var(--slant), 100% 0, 100% calc(100% - var(--slant)), 0 100%); margin-block: calc(var(--slant) * -1); padding-block: calc(var(--section) + var(--slant)); z-index: 1; }
.section--dark { background: var(--bg-2); border-top: 1px solid var(--border); }
.section__head { display: flex; justify-content: space-between; align-items: flex-end; gap: 2rem; margin-bottom: 2.75rem; flex-wrap: wrap; }
.section__head--center { justify-content: center; text-align: center; }
.section__head--center .h2 { margin-inline: auto; }
.section__head--center .eyebrow { justify-content: center; }
.section__note { max-width: 40ch; color: var(--muted); font-size: var(--text-sm); border-left: 2px solid var(--accent); padding-left: 1rem; }

/* How */
.how { display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(2rem, 5vw, 5rem); align-items: center; }
.steps { list-style: none; padding: 0; margin: 2.4rem 0 0; display: grid; gap: 2rem; }
.steps li { display: grid; grid-template-columns: 76px 1fr; gap: 1.1rem; }
.steps__n { font: 900 3.6rem/0.85 var(--font-display); color: transparent; -webkit-text-stroke: 2px var(--accent); }
.steps h3 { font-size: var(--text-xl); margin: 0.1rem 0 0.5rem; }
.steps p { color: var(--muted); max-width: 54ch; }
.phones { position: relative; height: clamp(460px, 52vw, 640px); }
.phones::before { content: ''; position: absolute; inset: 12% 8% 6% 14%; background: radial-gradient(closest-side, hsl(22 100% 52% / 0.28), transparent); filter: blur(10px); }
.phone {
  position: absolute; margin: 0; width: clamp(210px, 22vw, 290px); aspect-ratio: 390 / 844;
  border-radius: 34px; padding: 9px; background: hsl(75 6% 3%); box-shadow: 0 0 0 1px var(--border-strong), 0 30px 70px hsl(0 0% 0% / 0.6);
}
.phone img { width: 100%; height: 100%; object-fit: cover; object-position: top; border-radius: 26px; }
.phone--back { right: 46%; top: 0; }
.phone--front { right: 4%; top: 9%; }
.phone {
  --x: 0%; --y: 0px; --r: 0deg; --s: 1;
  transform: translate3d(var(--x), var(--y), 0) rotate(var(--r)) scale(var(--s));
  will-change: transform;
}
.phone--back { --r: -5deg; }
.phone--front { --r: 4deg; }
.phones::before { opacity: var(--glow, 1); }
@media (max-width: 860px) {
  .how { grid-template-columns: 1fr; }
  .phones { height: 520px; max-width: 460px; width: 100%; margin-inline: auto; }
  .phone { width: 220px; }
  .phone--back { left: 0; right: auto; }
  .phone--front { right: 0; }
}
@media (max-width: 420px) {
  .phones { height: 440px; }
  .phone { width: 180px; border-radius: 28px; padding: 7px; }
  .phone img { border-radius: 22px; }
  .steps li { grid-template-columns: 58px 1fr; }
  .steps__n { font-size: 2.8rem; }
}

/* Cards */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.card, .ride {
  position: relative; background: var(--surface); overflow: hidden; display: flex; flex-direction: column;
  box-shadow: inset 0 0 0 1px var(--border);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
  transition: transform 0.2s;
}
.card::after, .ride::after { content: ''; position: absolute; left: 0; right: 0; bottom: 0; height: 3px; background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform 0.25s; }
.card:hover, .ride:hover { transform: translateY(-3px); }
.card:hover::after, .ride:hover::after { transform: scaleX(1); }
.card img, .ride img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; filter: contrast(1.06) saturate(0.92); transition: transform 0.4s; }
.card:hover img, .ride:hover img { transform: scale(1.04); }
.card__body, .ride__body { padding: 1.3rem 1.35rem 1.6rem; position: relative; background: var(--surface); }
.card h3, .ride h3 { font-size: var(--text-xl); margin: 0.85rem 0 0.5rem; }
.card p, .ride p { color: var(--muted); font-size: var(--text-sm); }
.card__where { font: 700 0.72rem/1 var(--font-mono); letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent); margin-bottom: 0.8rem !important; }
.card--wide { grid-column: 1 / -1; display: grid; grid-template-columns: 1.4fr 1fr; }
.card--wide img { height: 100%; aspect-ratio: auto; min-height: 340px; }
.card--wide .card__body { padding: clamp(1.5rem, 3vw, 2.75rem); align-self: center; }
.card--wide h3 { font-size: var(--text-2xl); }
.card--wide p { font-size: var(--text-base); }
@media (max-width: 900px) {
  .cards { grid-template-columns: 1fr 1fr; }
  .card--wide { grid-template-columns: 1fr; }
  .card--wide img { min-height: 0; aspect-ratio: 16 / 10; }
}
@media (max-width: 600px) { .cards { grid-template-columns: 1fr; } }

/* Tags */
.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.tag { display: inline-block; font: 700 0.7rem/1 var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; padding: 0.4rem 0.55rem; background: var(--surface-2); color: var(--muted); box-shadow: inset 0 0 0 1px var(--border); }
.tag--accent { background: var(--accent); color: var(--on-accent); box-shadow: none; }
.tag--ride { background: var(--fg); color: var(--bg); box-shadow: none; }
.tag--sec { background: transparent; color: var(--fg); box-shadow: inset 0 0 0 1.5px var(--fg); }
.tag--plated { color: var(--accent); box-shadow: inset 0 0 0 1.5px var(--accent); }
.tag--narrow { color: var(--fg); box-shadow: none; outline: 1.5px dashed var(--faint); outline-offset: -1.5px; }

/* Rides + legend */
.rides { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
@media (max-width: 900px) { .rides { grid-template-columns: 1fr; max-width: 560px; } }
.legend { margin-top: 1.25rem; display: grid; grid-template-columns: 1fr 1.2fr; gap: 2rem; padding: clamp(1.5rem, 3vw, 2.5rem); background: var(--surface); box-shadow: inset 0 0 0 1px var(--border); border-left: 4px solid var(--accent); }
.legend h3 { font-size: var(--text-xl); margin-bottom: 0.7rem; }
.legend__intro p { color: var(--muted); font-size: var(--text-sm); max-width: 52ch; }
.legend__list { list-style: none; margin: 0; padding: 0; display: grid; gap: 1rem; align-content: center; }
.legend__list li { display: grid; grid-template-columns: 9.5rem 1fr; gap: 1rem; align-items: start; font-size: var(--text-sm); color: var(--muted); }
.legend__list .tag { justify-self: start; }
@media (max-width: 860px) { .legend { grid-template-columns: 1fr; } }
@media (max-width: 420px) { .legend__list li { grid-template-columns: 1fr; gap: 0.4rem; } }

/* Rules */
.rules { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 2.75rem; box-shadow: inset 0 0 0 1px var(--border); }
.rule { padding: 1.6rem 1.4rem 1.8rem; border-right: 1px solid var(--border); position: relative; }
.rule:last-child { border-right: 0; }
.rule::before { content: ''; position: absolute; top: 0; left: 0; width: 56px; height: 4px; background: var(--accent); }
.rule h3 { font-size: 1.6rem; margin-bottom: 0.6rem; }
.rule p { color: var(--muted); font-size: var(--text-sm); }
@media (max-width: 900px) { .rules { grid-template-columns: 1fr 1fr; } .rule { border-bottom: 1px solid var(--border); } .rule:nth-child(2n) { border-right: 0; } }
@media (max-width: 520px) { .rules { grid-template-columns: 1fr; } .rule { border-right: 0; } }

.bleed { margin: 0; height: clamp(280px, 44vw, 560px); position: relative; }
.bleed img { width: 100%; height: 100%; object-fit: cover; filter: contrast(1.1) saturate(0.85); }
.bleed::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, var(--bg) 0%, transparent 18%, transparent 82%, var(--bg) 100%); }

/* Pricing */
.plans { display: grid; grid-template-columns: repeat(2, minmax(0, 420px)); justify-content: center; gap: 1.5rem; }
.plan { position: relative; background: var(--surface); padding: 2.2rem 2rem 2rem; display: flex; flex-direction: column; box-shadow: inset 0 0 0 1px var(--border); clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%); }
.plan--feature { box-shadow: inset 0 0 0 2px var(--accent); background: linear-gradient(180deg, hsl(22 100% 52% / 0.1), var(--surface) 45%); }
.plan__flag { position: absolute; top: 0; right: 0; background: var(--accent); color: var(--on-accent); font: 800 0.95rem/1 var(--font-display); letter-spacing: 0.08em; text-transform: uppercase; padding: 0.5rem 0.9rem 0.5rem 1.2rem; clip-path: polygon(12px 0, 100% 0, 100% 100%, 0 100%); }
.plan h3 { font-size: 2rem; }
.plan__price { margin: 0.9rem 0 0.5rem; color: var(--muted); font-family: var(--font-mono); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.08em; }
.plan__price span { font: 900 4.2rem/0.9 var(--font-display); color: var(--fg); margin-right: 0.35rem; letter-spacing: 0; }
.plan--feature .plan__price span { color: var(--accent); }
.plan__desc { color: var(--muted); font-size: var(--text-sm); }
.checks { list-style: none; padding: 0; margin: 1.6rem 0 2rem; display: grid; gap: 0.75rem; flex: 1; }
.checks li { position: relative; padding-left: 1.8rem; font-size: var(--text-sm); }
.checks li::before {
  content: ''; position: absolute; left: 0; top: 0.28em; width: 1.05rem; height: 1.05rem;
  background: var(--accent) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23100f0c' stroke-width='4' stroke-linecap='square'%3E%3Cpath d='M5 12l5 5 9-10'/%3E%3C/svg%3E") center / 64% no-repeat;
}
@media (max-width: 760px) { .plans { grid-template-columns: 1fr; } }

/* Sponsors */
.sponsor { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 5vw, 5rem); align-items: start; }
.sponsor .btn { margin-top: 2.2rem; }
.sponsor__list { list-style: none; padding: 0; margin: 0; display: grid; counter-reset: s; }
.sponsor__list li { display: grid; grid-template-columns: 3rem 1fr; column-gap: 0.75rem; row-gap: 0.25rem; padding: 1.15rem 0; border-bottom: 1px solid var(--border); counter-increment: s; }
.sponsor__list li::before { content: counter(s, decimal-leading-zero); grid-row: span 2; font: 900 1.8rem/1 var(--font-display); color: var(--accent); }
.sponsor__list li:first-child { padding-top: 0; }
.sponsor__list strong { font: 800 1.45rem/1.05 var(--font-display); text-transform: uppercase; letter-spacing: 0.02em; }
.sponsor__list span { color: var(--muted); font-size: var(--text-sm); }
#sponsors::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 14px; background: repeating-linear-gradient(-45deg, var(--accent) 0 18px, var(--bg-2) 18px 36px); }
@media (max-width: 860px) { .sponsor { grid-template-columns: 1fr; } }

/* FAQ */
.faq { display: grid; grid-template-columns: 1fr 1.6fr; gap: clamp(2rem, 5vw, 5rem); }
.faq__list details { border-bottom: 1px solid var(--border); }
.faq__list details:first-child { border-top: 1px solid var(--border); }
.faq__list summary { list-style: none; cursor: pointer; padding: 1.3rem 3rem 1.3rem 0; position: relative; font: 800 1.45rem/1.1 var(--font-display); text-transform: uppercase; letter-spacing: 0.02em; transition: color 0.15s; }
.faq__list summary:hover { color: var(--accent); }
.faq__list summary::-webkit-details-marker { display: none; }
.faq__list summary::before, .faq__list summary::after { content: ''; position: absolute; right: 0.3rem; top: 50%; width: 16px; height: 3px; background: var(--accent); transition: transform 0.2s; }
.faq__list summary::after { transform: rotate(90deg); }
.faq__list details[open] summary::after { transform: rotate(0deg); }
.faq__list details p { padding: 0 0 1.4rem; color: var(--muted); max-width: 62ch; }
@media (max-width: 860px) { .faq { grid-template-columns: 1fr; } }

/* Join: hi-vis block */
.join { background: var(--accent); color: var(--on-accent); clip-path: polygon(0 var(--slant), 100% 0, 100% 100%, 0 100%); padding-top: calc(var(--section) + var(--slant)); }
.join__inner { text-align: center; display: flex; flex-direction: column; align-items: center; }
.join .h2 { margin-inline: auto; max-width: 16ch; font-size: clamp(2.8rem, 1.8rem + 4.2vw, 5.5rem); }
.join .lead { margin-inline: auto; color: hsl(75 10% 6% / 0.8); }
.join__form { display: grid; grid-template-columns: 1.2fr 1fr 150px auto; gap: 0.6rem; margin-top: 2.2rem; width: min(860px, 100%); }
.join__form input, .join__form select {
  min-width: 0; min-height: 56px; padding: 0 1rem; border: 0; border-radius: 0;
  background: var(--bg); color: var(--fg); font: inherit; box-shadow: inset 0 0 0 1px hsl(0 0% 100% / 0.08);
}
.join__form input::placeholder { color: var(--faint); }
.join__form input:focus, .join__form select:focus { outline: none; box-shadow: inset 0 0 0 2px var(--fg); }
.join__form input[aria-invalid='true'] { box-shadow: inset 0 0 0 2px hsl(0 85% 55%); }
.join__form select { appearance: none; padding-right: 2.2rem; cursor: pointer;
  background: var(--bg) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23ff7a1a' stroke-width='3'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E") right 0.8rem center / 14px no-repeat; }
.join__form select.is-empty { color: var(--faint); }
.join__form .btn { min-height: 56px; background: var(--bg); color: var(--fg); }
.join__form .btn:hover { background: hsl(75 10% 14%); }
.join__msg { margin-top: 1rem; min-height: 1.6em; font-size: var(--text-sm); font-weight: 600; color: var(--on-accent); }
.join__msg.is-error { color: hsl(0 80% 22%); }
@media (max-width: 760px) { .join__form { grid-template-columns: 1fr 1fr; } .join__form input[type=email], .join__form .btn { grid-column: 1 / -1; } }
@media (max-width: 480px) { .join__form { grid-template-columns: 1fr; } }

/* Footer */
.footer { padding: 2rem 0; background: var(--bg); font-size: var(--text-sm); color: var(--muted); }
.footer__row { display: flex; flex-wrap: wrap; gap: 0.75rem 2rem; align-items: center; }
.footer .logo__word { color: var(--sand); }
.footer a:hover { color: var(--accent); }

.show-sm { display: none; }
@media (max-width: 600px) {
  .hero__title br { display: none; }
  .hide-sm { display: none; }
  .show-sm { display: inline; }
}

/* Topographic contour accents */
.topo { isolation: isolate; }
.topo::after {
  content: ''; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background: var(--topo-color, var(--sand)); opacity: var(--topo-o, 0.17);
  -webkit-mask-image: url(img/topo.svg), radial-gradient(ellipse var(--topo-spread, 55% 60%) at var(--topo-at, 80% 40%), #000 15%, transparent 100%);
  mask-image: url(img/topo.svg), radial-gradient(ellipse var(--topo-spread, 55% 60%) at var(--topo-at, 80% 40%), #000 15%, transparent 100%);
  -webkit-mask-size: var(--topo-size, 1500px auto), 100% 100%; mask-size: var(--topo-size, 1500px auto), 100% 100%;
  -webkit-mask-position: var(--topo-pos, center), center; mask-position: var(--topo-pos, center), center;
  -webkit-mask-repeat: no-repeat; mask-repeat: no-repeat;
  -webkit-mask-composite: source-in; mask-composite: intersect;
}
#how.topo { --topo-at: 82% 45%; --topo-pos: 100% 30%; --topo-size: 1300px auto; --topo-o: 0.18; }
#challenges.topo { --topo-at: 8% 12%; --topo-pos: 0% 0%; --topo-size: 1700px auto; --topo-spread: 45% 40%; }
#pricing.topo { --topo-at: 50% 62%; --topo-pos: 40% 70%; --topo-size: 1600px auto; --topo-spread: 60% 55%; --topo-o: 0.15; }
#faq.topo { --topo-at: 12% 85%; --topo-pos: 0% 100%; --topo-size: 1400px auto; --topo-spread: 45% 55%; }
#join.topo { --topo-color: var(--on-accent); --topo-o: 0.14; --topo-at: 50% 55%; --topo-pos: 70% 20%; --topo-size: 1800px auto; --topo-spread: 80% 75%; }
@media (max-width: 860px) { .topo { --topo-size: 1000px auto !important; } }

/* Legal pages */
.header--solid { background: hsl(75 8% 6% / 0.94); box-shadow: 0 1px 0 var(--border), 0 3px 0 -1px var(--accent); }
.legal-hero { padding: calc(5.5rem + clamp(2.5rem, 5vw, 5rem)) 0 clamp(2.5rem, 5vw, 4.5rem); background: var(--bg-2); position: relative; }
.legal-hero__title { font-size: var(--text-2xl); }
.legal-hero__date { margin-top: 1rem; font: 700 0.78rem/1 var(--font-mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
#legal-top.topo { --topo-at: 85% 40%; --topo-pos: 100% 20%; --topo-size: 1400px auto; --topo-spread: 50% 80%; }
.legal-section { padding-top: clamp(2.5rem, 5vw, 4.5rem); }
.legal { display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: clamp(2rem, 5vw, 5rem); align-items: start; }
.legal__toc { position: sticky; top: 6.5rem; border-left: 1px solid var(--border-strong); padding-left: 1.1rem; }
.legal__toc-label { font: 700 0.7rem/1 var(--font-mono); letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent); margin-bottom: 0.9rem; }
.legal__toc ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.55rem; }
.legal__toc a { color: var(--muted); text-decoration: none; font-size: var(--text-sm); line-height: 1.35; }
.legal__toc a:hover { color: var(--fg); }
.legal__body { max-width: 70ch; font-size: var(--text-base); line-height: 1.7; color: hsl(45 14% 82%); }
.legal__body h2 { font-size: var(--text-xl); color: var(--fg); margin: 2.8rem 0 0.9rem; scroll-margin-top: 6.5rem; max-width: none; }
.legal__body p { margin: 0 0 1rem; }
.legal__body ul { margin: 0 0 1.2rem; padding-left: 1.2rem; }
.legal__body li { margin-bottom: 0.5rem; padding-left: 0.2rem; }
.legal__body li::marker { color: var(--accent); }
.legal__body strong { color: var(--fg); font-weight: 600; }
.legal__body a { color: var(--accent); text-underline-offset: 3px; }
.legal__body a:hover { color: var(--accent-hover); }
.legal__summary { background: var(--surface); border-left: 4px solid var(--accent); padding: 1.4rem 1.6rem 0.6rem; margin-bottom: 0.5rem; }
.legal__summary .legal__summary-title { font-size: var(--text-lg); margin: 0 0 0.9rem; }
@media (max-width: 860px) {
  .legal { grid-template-columns: 1fr; }
  .legal__toc { position: static; }
  .legal__toc ol { grid-template-columns: 1fr; }
}
.footer__row a { text-decoration: none; }
.join__legal { margin-top: 0.9rem; font-size: var(--text-sm); color: hsl(75 10% 6% / 0.75); }
.join__legal a { color: var(--on-accent); font-weight: 600; }
.rule a, .faq__list a { color: var(--accent); text-underline-offset: 3px; }