/* Curv website. Design language follows native.security: dark topographic
   canvas, light serif display type, mono UI labels, single green accent. */
:root {
  --bg: #121212;
  --bg-2: #181818;
  --line: #2a2a2a;
  --line-2: #363636;
  --text: #fafafa;
  --muted: #9e9e9e;
  --dim: #6f6f6f;
  --green: #307c56;
  --green-2: #3fa572;
  --green-ink: #0d0d0d;
  --btn: #3fa572;
  --btn-hover: #56b987;
  --light: #f5f5f3;
  --light-2: #ecece8;
  --ink: #161616;
  --ink-muted: #5c5c5c;
  --serif: "Source Serif 4", "Times New Roman", serif;
  --sans: "Source Sans 3", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "Source Code Pro", ui-monospace, SFMono-Regular, Menlo, monospace;
  --wrap: 1176px;
  --nav-h: 62px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 16px/1.5 var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg, canvas { display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
h1, h2, h3, h4, p { margin: 0; }

.wrap { width: min(100% - 48px, var(--wrap)); margin-inline: auto; position: relative; z-index: 1; }
.skip { position: absolute; left: -9999px; top: 8px; z-index: 100; background: var(--green); color: var(--green-ink); padding: 8px 12px; font: 12px var(--mono); }
.skip:focus { left: 8px; }
:focus-visible { outline: 2px solid var(--green-2); outline-offset: 3px; }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  height: var(--nav-h);
  background: rgba(18, 18, 18, 0.86);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav__inner { height: 100%; display: flex; align-items: center; gap: 32px; }
.logo { display: inline-flex; align-items: center; color: var(--text); }
.logo img { height: 24px; width: auto; }
.nav__links { display: flex; gap: 28px; margin-inline: auto; }
.nav__links a, .mobile-menu a:not(.btn) {
  font: 400 12px/1 var(--mono); text-transform: uppercase; letter-spacing: 0.04em; color: #8a8a8a;
  transition: color .15s;
}
.nav__links a:hover { color: var(--text); }
.nav__cta { display: flex; gap: 8px; }
.nav__toggle { display: none; width: 36px; height: 36px; position: relative; }
.nav__toggle span { position: absolute; left: 9px; right: 9px; height: 1.5px; background: var(--text); transition: transform .2s; }
.nav__toggle span:first-child { top: 14px; }
.nav__toggle span:last-child { top: 21px; }
.nav__toggle[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }
.mobile-menu { display: grid; gap: 20px; padding: 24px; background: var(--bg); border-bottom: 1px solid var(--line); }
.mobile-menu[hidden] { display: none; }
@media (min-width: 961px) { .mobile-menu { display: none; } }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  height: 40px; padding: 0 16px;
  font: 400 12px/1 var(--mono); text-transform: uppercase; letter-spacing: 0.06em;
  border: 1px solid transparent; border-radius: 2px;
  transition: background .15s, border-color .15s, color .15s, box-shadow .15s;
  white-space: nowrap;
}
.btn--sm { height: 30px; padding: 0 12px; font-size: 11px; }
.btn--primary { background: var(--btn); color: var(--green-ink); box-shadow: 0 0 0 1px var(--bg), 0 0 0 2px var(--btn); }
.btn--sm.btn--primary { box-shadow: none; }
.btn--primary:hover { background: var(--btn-hover); }
.btn--ghost { background: #161616; border-color: var(--line-2); color: var(--text); }
.btn--ghost:hover { border-color: #5a5a5a; }
.btn--dark { background: var(--ink); color: var(--light); }
.btn--dark:hover { background: #2b2b2b; }
.btn--outline { border-color: #c9c9c4; color: var(--ink); }
.btn--outline:hover { border-color: var(--ink); }
.chev { font-size: 16px; line-height: 0; transform: translateY(-1px); }

/* ---------- Topographic canvas ---------- */
.dark, .light { position: relative; overflow: hidden; }
.light { background: var(--light); color: var(--ink); }
.topo { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; z-index: 0; }
.topo--right { left: 35%; width: 65%; }

/* ---------- Hero ---------- */
.hero { min-height: calc(100svh - var(--nav-h)); display: flex; align-items: center; padding: 96px 0 120px; }
.hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(18,18,18,.92) 0%, rgba(18,18,18,.55) 45%, rgba(18,18,18,0) 75%); z-index: 0; }
.hero__inner { display: flex; flex-direction: column; align-items: flex-start; }
.pill {
  align-self: center; margin-bottom: 88px;
  display: inline-flex; gap: 8px; align-items: center; flex-wrap: wrap; justify-content: center;
  padding: 7px 14px; border: 1px solid var(--line-2); background: rgba(24,24,24,.8); border-radius: 2px;
  font-size: 13px; color: #d6d6d6;
}
.pill__tag { font-weight: 600; color: var(--text); }
.pill__more { color: var(--muted); }
.pill:hover .pill__more { color: var(--text); }
.display {
  font: 200 clamp(52px, 8vw, 104px)/1 var(--serif);
  letter-spacing: -0.012em;
  font-variation-settings: "opsz" 60;
}
.display--md { font-size: clamp(44px, 6vw, 80px); }
.lede { margin-top: 32px; max-width: 470px; font-size: 18px; line-height: 1.3; color: var(--muted); letter-spacing: -0.01em; }
.actions { margin-top: 36px; display: flex; gap: 10px; flex-wrap: wrap; }

/* ---------- Statement ---------- */
.statement { padding: 180px 0 200px; }
.statement__line { font: 300 clamp(36px, 4.6vw, 60px)/1.1 var(--serif); letter-spacing: -0.01em; max-width: 680px; }
.statement__line--muted { margin-top: 120px; color: var(--muted); }

/* ---------- Urgent ---------- */
.urgent { padding: 140px 0 160px; border-top: 1px solid var(--line); background: radial-gradient(ellipse 60% 50% at 50% 0%, #1d1d1d 0%, var(--bg) 70%); }
.center { text-align: center; display: flex; flex-direction: column; align-items: center; }
.h2 { font: 300 clamp(36px, 4.4vw, 56px)/1.05 var(--serif); letter-spacing: -0.01em; }
.sub { margin-top: 20px; max-width: 540px; font-size: 17px; line-height: 1.4; color: var(--muted); }
.light .sub { color: var(--ink-muted); }
.center .btn { margin-top: 32px; }
.grid3 { margin-top: 110px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border-top: 1px solid var(--line); }
.feature { padding: 40px 32px 8px 0; }
.feature + .feature { padding-left: 32px; border-left: 1px solid var(--line); }
.feature__num { font: 12px var(--mono); color: var(--green-2); }
.feature h3 { margin-top: 18px; font: 600 19px/1.25 var(--sans); }
.feature p { margin-top: 14px; color: var(--muted); font-size: 15.5px; line-height: 1.5; }

/* ---------- Mark ---------- */
.mark { height: 560px; display: grid; place-items: center; background: radial-gradient(ellipse 70% 80% at 50% 50%, #303030 0%, #232323 55%, var(--bg) 100%); }
.mark::before { content: ""; position: absolute; inset: 0; opacity: .7; background-image: radial-gradient(rgba(255,255,255,.07) 1px, transparent 1.2px), radial-gradient(rgba(0,0,0,.35) 1px, transparent 1.2px); background-size: 4px 4px, 5px 5px; background-position: 0 0, 2px 3px; }
.mark__glyph { position: relative; width: 320px; height: 320px; color: #141414; filter: drop-shadow(-2px -2px 1px rgba(0,0,0,.7)) drop-shadow(2px 2px 1px rgba(255,255,255,.12)); }
.mark__glyph svg { width: 100%; height: 100%; }

/* ---------- Portfolio ---------- */
.portfolio { padding: 150px 0 140px; }
.section-head { max-width: 640px; }
.eyebrow { display: inline-block; font: 12px/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--green); margin-bottom: 22px; }
.dark .eyebrow { color: var(--green-2); }
.cards { margin-top: 72px; display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.card {
  display: flex; flex-direction: column; align-items: flex-start;
  padding: 36px; background: rgba(255,255,255,.72); border: 1px solid #dedcd6; border-radius: 3px;
  backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px);
}
.card__top { width: 100%; display: flex; justify-content: space-between; align-items: center; }
.status { display: inline-flex; gap: 8px; align-items: center; font: 11px/1 var(--mono); text-transform: uppercase; letter-spacing: .06em; }
.status i { width: 7px; height: 7px; border-radius: 50%; }
.status--live { color: var(--green); }
.status--live i { background: var(--green-2); box-shadow: 0 0 0 4px rgba(63,165,114,.18); animation: pulse 2.4s infinite; }
.status--dev { color: #8a6d1f; }
.status--dev i { background: #c79a2a; }
.card__cat { font: 11px var(--mono); color: #8c8c88; text-transform: uppercase; letter-spacing: .06em; }
.card__title { margin-top: 44px; font: 300 40px/1.05 var(--serif); letter-spacing: -0.01em; }
.card__lede { margin-top: 12px; font: 500 18px/1.35 var(--sans); }
.card p:not(.card__lede) { margin-top: 16px; color: var(--ink-muted); font-size: 15.5px; line-height: 1.55; }
.ticks { list-style: none; padding: 0; margin: 24px 0 32px; display: grid; gap: 10px; font-size: 15px; }
.ticks li { display: flex; gap: 10px; align-items: baseline; }
.ticks li::before { content: ""; flex: none; width: 8px; height: 8px; background: var(--ink); transform: translateY(-1px); }
.card .btn { margin-top: auto; }
@keyframes pulse { 50% { box-shadow: 0 0 0 7px rgba(63,165,114,0); } }

/* ---------- Approach ---------- */
.approach { padding: 120px 0 150px; border-top: 1px solid #e3e2dd; background: #fafaf8; }
.approach__inner { display: grid; grid-template-columns: 1fr 1.15fr; gap: 64px; align-items: center; }
.steps { margin: 36px 0 0; display: grid; justify-items: start; gap: 4px; }
.steps button { display: inline-flex; align-items: center; gap: 10px; padding: 4px 0; font-size: 15px; color: #8c8c88; transition: color .15s; }
.steps button::before { content: ""; width: 8px; height: 8px; border: 1px solid #b5b5b0; }
.steps button[aria-selected="true"] { color: var(--ink); font-weight: 600; }
.steps button[aria-selected="true"]::before { background: var(--ink); border-color: var(--ink); }
.steps button:hover { color: var(--ink); }
.approach__panel { position: relative; min-height: 420px; border: 1px solid #dedcd6; background: #fff; border-radius: 3px; overflow: hidden; display: flex; align-items: flex-end; }
.topo--panel { opacity: .9; }
.panel__body { position: relative; z-index: 1; padding: 36px; max-width: 460px; background: linear-gradient(0deg, #fff 60%, rgba(255,255,255,0)); }
.panel__body h3 { font: 300 36px/1.1 var(--serif); }
.panel__body p { margin-top: 12px; color: var(--ink-muted); font-size: 16px; line-height: 1.5; }
.panel__body.is-swapping { animation: swap .35s ease; }
@keyframes swap { from { opacity: 0; transform: translateY(6px); } }

/* ---------- Principles ---------- */
.principles { padding: 150px 0; }
.quotes { margin-top: 72px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.quote { margin: 0; padding: 32px; border: 1px solid var(--line); background: var(--bg-2); border-radius: 3px; display: flex; flex-direction: column; justify-content: space-between; min-height: 260px; }
.quote blockquote { margin: 0; font: 300 23px/1.3 var(--serif); }
.quote figcaption { margin-top: 32px; font: 12px var(--mono); text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.quote figcaption::before { content: "@ "; color: var(--green-2); }

/* ---------- CTA ---------- */
.cta { padding: 170px 0; border-top: 1px solid var(--line); }
.cta::after { content: ""; position: absolute; inset: 0; background: radial-gradient(ellipse 55% 70% at 25% 50%, rgba(18,18,18,.92), rgba(18,18,18,.2)); }
.cta__inner { display: flex; flex-direction: column; align-items: flex-start; }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--line); padding: 72px 0 32px; }
.footer__inner { display: flex; justify-content: space-between; gap: 48px; flex-wrap: wrap; }
.footer__brand p { margin-top: 14px; color: var(--muted); font-size: 15px; }
.footer__cols { display: flex; gap: 72px; flex-wrap: wrap; }
.footer__cols div { display: grid; gap: 10px; align-content: start; }
.footer__cols h4 { font: 12px var(--mono); text-transform: uppercase; letter-spacing: .06em; color: var(--dim); margin-bottom: 6px; font-weight: 400; }
.footer__cols a { color: #cfcfcf; font-size: 15px; }
.footer__cols a:hover { color: var(--text); }
.footer__legal { margin-top: 72px; padding-top: 24px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; font: 12px var(--mono); color: var(--dim); }
.footer__legal a:hover { color: var(--text); }

/* ---------- Reveal ---------- */
.js .reveal { opacity: 0; transform: translateY(18px); filter: blur(6px); transition: opacity .8s ease, transform .8s ease, filter .8s ease; }
.js .reveal.is-in { opacity: 1; transform: none; filter: none; }

/* ---------- 404 ---------- */
.notfound { min-height: 100svh; display: grid; place-items: center; text-align: center; padding: 48px 0; }
.notfound .actions { justify-content: center; }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .nav__links, .nav__cta { display: none; }
  .nav__toggle { display: block; margin-left: auto; }
  .grid3, .quotes, .cards { grid-template-columns: 1fr; }
  .feature, .feature + .feature { padding: 32px 0; border-left: 0; border-bottom: 1px solid var(--line); }
  .approach__inner { grid-template-columns: 1fr; gap: 40px; }
  .topo--right { left: 0; width: 100%; opacity: .6; }
}
@media (max-width: 600px) {
  .hero { padding: 56px 0 80px; }
  .pill { margin-bottom: 56px; font-size: 12px; }
  .statement, .urgent, .portfolio, .principles, .cta { padding: 100px 0; }
  .statement__line--muted { margin-top: 64px; }
  .grid3 { margin-top: 64px; }
  .card { padding: 26px; }
  .card__title { font-size: 34px; }
  .mark { height: 360px; }
  .mark__glyph { width: 200px; height: 200px; }
  .footer__legal { flex-direction: column; gap: 12px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; filter: none; transition: none; }
  .status--live i { animation: none; }
}