/* SPDX-License-Identifier: MIT */
/* Mitcad website: one dark theme, colours from the application icon. */

:root {
  --bg: #070b12;
  --bg-2: #0b121d;
  --panel: rgba(20, 32, 50, .55);
  --panel-solid: #111b2a;
  --line: rgba(140, 198, 250, .12);
  --line-strong: rgba(140, 198, 250, .28);
  --text: #e6eef8;
  --muted: #93a4ba;
  --faint: #5d6f86;
  --accent: #4a9af0;
  --accent-2: #8cc6fa;
  --accent-3: #1f6fe0;
  --radius: 16px;
  --wrap: 1180px;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Consolas, monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 var(--font);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
/* Blueprint grid and soft glows behind everything */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 600px at 80% -10%, rgba(31, 111, 224, .28), transparent 60%),
    radial-gradient(700px 500px at -10% 30%, rgba(74, 154, 240, .12), transparent 60%),
    linear-gradient(var(--line) 1px, transparent 1px) 0 0 / 48px 48px,
    linear-gradient(90deg, var(--line) 1px, transparent 1px) 0 0 / 48px 48px,
    var(--bg);
  mask-image: linear-gradient(to bottom, #000 0, #000 70%, rgba(0, 0, 0, .35) 100%);
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { color: #fff; }
img { max-width: 100%; display: block; }
code { font-family: var(--mono); font-size: .92em; color: var(--accent-2); }
h1, h2, h3 { line-height: 1.12; letter-spacing: -.02em; margin: 0; }
h2 { font-size: clamp(1.9rem, 3.6vw, 2.8rem); font-weight: 700; }
h3 { font-size: 1.08rem; font-weight: 650; }
p { margin: 0; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.small { font-size: .9rem; color: var(--muted); }
.center { text-align: center; }

.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 16px; z-index: 100; background: var(--accent); color: #fff; padding: 8px 14px; border-radius: 8px; }

/* Navigation */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  background: rgba(7, 11, 18, .72);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; font-size: 1.12rem; letter-spacing: -.01em; }
.brand:hover { color: #fff; }
.links { display: flex; align-items: center; gap: 28px; }
.links a { color: var(--muted); font-size: .95rem; font-weight: 500; transition: color .15s; }
.links a:hover { color: var(--text); }
.links .gh { display: inline-flex; align-items: center; gap: 8px; padding: 7px 14px; border: 1px solid var(--line-strong); border-radius: 999px; color: var(--text); }
.links .gh:hover { border-color: var(--accent); background: rgba(74, 154, 240, .1); }
.menu-toggle, .menu-button { display: none; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 22px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 1rem;
  transition: transform .15s, box-shadow .2s, background .2s, border-color .2s;
}
.btn.primary {
  color: #fff;
  background: linear-gradient(180deg, #5aa7f5, var(--accent-3));
  box-shadow: 0 8px 30px -8px rgba(31, 111, 224, .8), inset 0 1px 0 rgba(255, 255, 255, .25);
}
.btn.primary:hover { transform: translateY(-1px); box-shadow: 0 12px 36px -8px rgba(31, 111, 224, .95), inset 0 1px 0 rgba(255, 255, 255, .3); color: #fff; }
.btn.ghost { color: var(--text); border: 1px solid var(--line-strong); background: rgba(255, 255, 255, .02); }
.btn.ghost:hover { border-color: var(--accent-2); background: rgba(140, 198, 250, .06); color: #fff; }

/* Hero */
.hero { padding: 96px 0 72px; }
.hero-grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 48px; align-items: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 6px 14px; border: 1px solid var(--line-strong); border-radius: 999px;
  color: var(--accent-2); font-size: .85rem; font-weight: 600; letter-spacing: .02em;
  background: rgba(74, 154, 240, .06);
}
.dot { width: 7px; height: 7px; border-radius: 50%; background: #4ade80; box-shadow: 0 0 10px #4ade80; }
h1 { font-size: clamp(2.5rem, 5.2vw, 4.25rem); font-weight: 800; margin: 22px 0 22px; letter-spacing: -.035em; }
.grad {
  background: linear-gradient(100deg, #ffffff 0%, var(--accent-2) 40%, var(--accent) 75%, #6f8cff 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lead { font-size: 1.18rem; color: var(--muted); max-width: 34em; }
.cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.platforms { display: flex; gap: 10px; list-style: none; padding: 0; margin: 30px 0 0; }
.platforms li { font-size: .82rem; color: var(--faint); font-weight: 600; letter-spacing: .06em; text-transform: uppercase; }
.platforms li + li::before { content: "·"; margin-right: 10px; color: var(--faint); }

.hero-art { margin: 0; }
.blueprint { width: 100%; height: auto; overflow: visible; }
.construct line { stroke: var(--accent-2); stroke-opacity: .18; stroke-width: 1; stroke-dasharray: 6 6; }
.solid { filter: drop-shadow(0 30px 40px rgba(0, 0, 0, .55)); animation: rise 1.2s .6s both cubic-bezier(.2, .7, .2, 1); }
.edges path, .edges ellipse { fill: none; stroke: #e6f2ff; stroke-width: 1.6; stroke-linejoin: round; stroke-dasharray: 900; stroke-dashoffset: 900; animation: draw 1.6s .1s forwards ease-out; }
.dims path { fill: none; stroke: var(--accent-2); stroke-width: 1.1; opacity: 0; animation: fade .6s 1.5s forwards; }
.dims text { fill: var(--accent-2); font: 600 14px var(--mono); opacity: 0; animation: fade .6s 1.7s forwards; }
.pts circle { fill: #fff; stroke: var(--accent); stroke-width: 2; opacity: 0; animation: fade .4s 1.3s forwards; }
@keyframes draw { to { stroke-dashoffset: 0; } }
@keyframes fade { to { opacity: 1; } }
@keyframes rise { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: none; } }

/* Screenshot showcase */
.showcase { padding: 8px 0 40px; }
.window {
  border-radius: 14px; overflow: hidden;
  border: 1px solid var(--line-strong);
  background: var(--panel-solid);
  box-shadow: 0 40px 120px -30px rgba(31, 111, 224, .45), 0 20px 60px -20px rgba(0, 0, 0, .8);
}
.window-bar { display: flex; gap: 8px; padding: 12px 14px; background: #0e1724; border-bottom: 1px solid var(--line); }
.window-bar i { width: 11px; height: 11px; border-radius: 50%; background: #2a3a50; }
.shots { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 20px; }
.shots figure { margin: 0; }
.shots img { border-radius: 12px; border: 1px solid var(--line-strong); }
.shots figcaption { margin-top: 12px; font-size: .9rem; color: var(--muted); }
.shots figcaption b { color: var(--text); }
.window img, .shots img { width: 100%; height: auto; }

/* Sections */
.section { padding: 110px 0; }
.section.alt { background: linear-gradient(180deg, rgba(11, 18, 29, 0), rgba(11, 18, 29, .85) 18%, rgba(11, 18, 29, .85) 82%, rgba(11, 18, 29, 0)); }
.section-head { max-width: 720px; margin: 0 auto 56px; text-align: center; }
.section-head.left { text-align: left; margin: 0; }
.section-head p:not(.kicker) { margin-top: 18px; color: var(--muted); font-size: 1.08rem; }
.kicker { color: var(--accent); font-weight: 700; font-size: .82rem; letter-spacing: .14em; text-transform: uppercase; margin-bottom: 14px !important; }

/* Feature cards */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.card {
  position: relative;
  padding: 26px 24px 28px;
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(24, 38, 58, .7), rgba(14, 22, 34, .6));
  border: 1px solid var(--line);
  transition: transform .2s, border-color .2s, box-shadow .2s;
}
.card::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
  background: radial-gradient(400px 140px at 0 0, rgba(74, 154, 240, .14), transparent 70%);
}
.card:hover { transform: translateY(-3px); border-color: var(--line-strong); box-shadow: 0 20px 50px -25px rgba(31, 111, 224, .6); }
.card h3 { margin: 18px 0 8px; }
.card p { color: var(--muted); font-size: .95rem; }
.icon {
  width: 44px; height: 44px; display: grid; place-items: center;
  border-radius: 12px; background: rgba(74, 154, 240, .12); border: 1px solid rgba(74, 154, 240, .3);
}
.icon svg { width: 22px; height: 22px; fill: none; stroke: var(--accent-2); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }

/* Formats */
.formats-grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: 64px; align-items: center; }
.text-link { display: inline-block; margin-top: 22px; font-weight: 600; }
.format-table { border: 1px solid var(--line-strong); border-radius: var(--radius); overflow: hidden; background: rgba(10, 16, 26, .7); }
.row { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 12px; align-items: center; padding: 13px 20px; border-top: 1px solid var(--line); font-size: .95rem; }
.row.head { border-top: 0; background: rgba(74, 154, 240, .08); color: var(--muted); font-size: .78rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.row b { color: var(--text); font-weight: 650; }
.row span:first-child { color: var(--muted); }
.tag { justify-self: start; padding: 3px 10px; border-radius: 999px; font-size: .8rem; font-weight: 600; color: var(--accent-2); background: rgba(74, 154, 240, .12); border: 1px solid rgba(74, 154, 240, .25); }
.tag.hist { color: #b6f0c8; background: rgba(74, 222, 128, .1); border-color: rgba(74, 222, 128, .3); }
.no { color: var(--faint); }

/* Why */
.why { display: grid; grid-template-columns: 220px 1fr; gap: 56px; align-items: center; max-width: 980px; }
.why-mark { display: grid; place-items: center; aspect-ratio: 1; border-radius: 32px; border: 1px solid var(--line-strong); background: radial-gradient(circle at 50% 40%, rgba(74, 154, 240, .25), transparent 70%); }
.why-mark img { filter: drop-shadow(0 20px 40px rgba(31, 111, 224, .5)); }
.why h2 { margin-bottom: 18px; }
.why p:not(.kicker) { color: var(--muted); font-size: 1.08rem; }
.facts { list-style: none; padding: 0; margin: 32px 0 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.facts li { padding: 16px 18px; border-left: 2px solid var(--accent); background: rgba(74, 154, 240, .05); border-radius: 0 10px 10px 0; }
.facts b { display: block; font-size: .98rem; }
.facts span { font-size: .88rem; color: var(--muted); }

/* Downloads */
.downloads { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 28px; }
.dl {
  display: flex; flex-direction: column; gap: 6px;
  padding: 30px 28px; border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(24, 38, 58, .75), rgba(12, 20, 32, .7));
  border: 1px solid var(--line-strong); color: var(--text);
  transition: transform .2s, border-color .2s, box-shadow .2s;
}
.dl:hover { transform: translateY(-3px); border-color: var(--accent); box-shadow: 0 24px 60px -28px rgba(31, 111, 224, .9); color: var(--text); }
.dl .os { width: 34px; height: 34px; fill: var(--accent-2); margin-bottom: 12px; }
.dl h3 { font-size: 1.3rem; }
.dl .meta { color: var(--muted); font-size: .9rem; }
.dl .file { margin-top: 18px; align-self: flex-start; padding: 8px 14px; border-radius: 10px; background: rgba(74, 154, 240, .14); color: var(--accent-2); font-family: var(--mono); font-size: .82rem; font-weight: 600; }
.dl:hover .file { background: var(--accent-3); color: #fff; }

/* Community */
.community {
  display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap;
  padding: 48px; border-radius: 24px; border: 1px solid var(--line-strong);
  background: radial-gradient(600px 240px at 100% 0, rgba(31, 111, 224, .3), transparent 70%), var(--panel-solid);
}
.community h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
.community p { color: var(--muted); margin-top: 10px; max-width: 34em; }
.community .cta { margin-top: 0; }

/* Footer */
.footer { border-top: 1px solid var(--line); padding: 40px 0 48px; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.footer nav { display: flex; gap: 24px; flex-wrap: wrap; }
.footer nav a { color: var(--muted); font-size: .92rem; }
.footer nav a:hover { color: var(--text); }

/* Entrance on scroll (site.js adds .in) */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* Narrow screens */
@media (max-width: 1000px) {
  .hero-grid, .formats-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 64px; }
  .hero-art { max-width: 520px; margin: 0 auto; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .why { grid-template-columns: 1fr; text-align: left; }
  .why-mark { width: 160px; }
  .facts { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .wrap { padding: 0 16px; }
  .menu-button { display: grid; place-items: center; width: 40px; height: 40px; cursor: pointer; }
  .menu-button span, .menu-button span::before, .menu-button span::after { display: block; width: 20px; height: 2px; background: var(--text); border-radius: 2px; position: relative; content: ""; }
  .menu-button span::before { position: absolute; top: -6px; }
  .menu-button span::after { position: absolute; top: 6px; }
  .links { display: none; position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; align-items: flex-start; gap: 4px; padding: 12px 16px 20px; background: rgba(7, 11, 18, .97); border-bottom: 1px solid var(--line); }
  .links a { padding: 10px 0; font-size: 1.05rem; }
  .menu-toggle:checked ~ .links { display: flex; }
  .cards, .downloads, .shots { grid-template-columns: 1fr; }
  .section { padding: 80px 0; }
  .row { grid-template-columns: 1.2fr 1fr 1fr; padding: 12px 14px; font-size: .85rem; }
  .community { padding: 32px 24px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .edges path, .edges ellipse { stroke-dashoffset: 0; }
  .dims path, .dims text, .pts circle, .reveal { opacity: 1; transform: none; }
}