/* Insanely Awesome Developments — shared styles */

/* Fonts are self-hosted (SIL OFL, see assets/fonts/OFL.txt) so visitors only talk to our own host */
@font-face{
  font-family:"Funnel Display"; font-style:normal; font-weight:500 700; font-display:swap;
  src:url("fonts/funnel-display-latin.woff2") format("woff2");
}
@font-face{
  font-family:"Funnel Sans"; font-style:normal; font-weight:400 600; font-display:swap;
  src:url("fonts/funnel-sans-latin.woff2") format("woff2");
}

:root{
  --night:#0a1018;      /* matches the icons' own dark grounds */
  --floor:#111c29;
  --ink:#eef2f6;
  --muted:#8d9aab;
  --faint:rgba(238,242,246,.1);

  --display:"Funnel Display", ui-sans-serif, system-ui, sans-serif;
  --sans:"Funnel Sans", ui-sans-serif, system-ui, sans-serif;

  --gutter:clamp(16px, 4vw, 56px);
  color-scheme:dark;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ background:var(--night); -webkit-text-size-adjust:100%; }
body{
  margin:0;
  min-height:100vh; min-height:100svh;
  display:flex; flex-direction:column;
  background:
    radial-gradient(90% 55% at 50% 108%, var(--floor) 0%, transparent 70%),
    var(--night);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px; line-height:1.55;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{ color:inherit; }
:focus-visible{ outline:2px solid var(--ink); outline-offset:4px; border-radius:6px; }

/* ── top bar ───────────────────────── */
.top{
  display:flex; align-items:center; justify-content:space-between; gap:16px;
  padding:22px var(--gutter);
}
.top--end{ justify-content:flex-end; }
.wordmark{
  font-family:var(--display); font-weight:600; font-size:17px;
  letter-spacing:-.01em; text-decoration:none;
}
.top nav{ display:flex; gap:clamp(16px, 2.4vw, 28px); font-size:15px; white-space:nowrap; }
.top nav a, .foot a{
  color:var(--muted); text-decoration:none;
  transition:color .2s ease;
}
.top nav a:hover, .foot a:hover{ color:var(--ink); }

/* ── home: intro ───────────────────── */
.home{
  flex:1;
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  padding:clamp(16px, 5vh, 72px) var(--gutter) clamp(56px, 10vh, 112px);
  text-align:center;
}
.home h1{
  margin:0;
  font-family:var(--display); font-weight:600;
  font-size:clamp(34px, 4.6vw, 64px);
  line-height:1.02; letter-spacing:-.025em;
  text-wrap:balance;
}
.intro{
  margin:16px 0 0;
  max-width:56ch;
  color:var(--muted);
  font-size:clamp(16px, 1.3vw, 18px);
  text-wrap:balance;
}

/* ── home: the three apps ──────────── */
.apps{
  list-style:none; margin:clamp(56px, 10vh, 104px) 0 0; padding:0;
  width:100%; max-width:1080px;
  display:grid; grid-template-columns:repeat(3, minmax(0, 1fr));
  gap:clamp(24px, 4vw, 64px);
}
.app{
  --size:clamp(148px, 17vw, 228px);
  display:flex; flex-direction:column; align-items:center;
  text-decoration:none;
  border-radius:24px;
}
.app:focus-visible{ outline-offset:12px; }

.icon{
  position:relative;
  width:var(--size); aspect-ratio:1;
  margin-bottom:clamp(24px, 3vw, 36px);
}
/* the light each icon throws */
.glow{
  position:absolute; inset:-24%;
  border-radius:50%;
  background:var(--glow);
  filter:blur(var(--glow-blur, 44px));
  opacity:var(--glow-o, .5);
  transition:opacity .45s ease, transform .45s ease;
  animation:lights-up 1.6s cubic-bezier(.25,.6,.2,1) var(--cue, 0s) backwards;
  pointer-events:none;
}
.tile{
  display:block; position:relative; z-index:1;
  width:100%; height:100%;
  border-radius:22.5%;
  box-shadow:
    0 2px 0 rgba(255,255,255,.04),
    0 28px 50px -18px rgba(0,0,0,.85);
  transition:transform .45s cubic-bezier(.25,.6,.2,1);
  animation:tile-up 1.2s ease-out var(--cue, 0s) backwards;
}
.tile img{ display:block; width:100%; height:100%; border-radius:inherit; }
.tile::after{ /* defines the edge against the dark ground */
  content:""; position:absolute; inset:0; border-radius:inherit;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.07);
  pointer-events:none;
}

.app h2{
  margin:0;
  font-family:var(--display); font-weight:600;
  font-size:clamp(20px, 1.9vw, 25px);
  line-height:1.15; letter-spacing:-.015em;
}
.app p{ margin:6px 0 0; color:var(--muted); font-size:15px; max-width:26ch; }
.app .go{
  display:inline-block; margin-top:14px;
  color:var(--ink); font-size:15px; font-weight:500;
  text-decoration:underline; text-decoration-thickness:1px;
  text-underline-offset:5px; text-decoration-color:rgba(238,242,246,.35);
  transition:text-decoration-color .3s ease;
}

/* each app's own light */
.app--stageplot{
  --glow:radial-gradient(closest-side, #46c6d4 0%, rgba(62,182,196,.7) 50%, transparent 100%);
  --glow-o:.62; --cue:.2s;
}
.app--sigmate{
  --glow:linear-gradient(90deg, #ff4fd2 0%, #b07cff 50%, #4f9dff 100%);
  --glow-o:.38; --glow-blur:56px; --cue:.55s;
}
.app--koordinat{
  --glow:radial-gradient(closest-side, #4a86f0 0%, rgba(74,134,240,.8) 62%, rgba(240,196,112,.32) 84%, transparent 100%);
  --glow-o:.55; --cue:.9s;
}

/* the one link: it answers the pointer */
a.app:hover .glow, a.app:focus-visible .glow{ opacity:.8; transform:scale(1.06); }
a.app:hover .tile, a.app:focus-visible .tile{ transform:translateY(-6px); }
a.app:hover .go{ text-decoration-color:var(--ink); }

@keyframes lights-up{ from{ opacity:0; transform:scale(.7); } }
@keyframes tile-up{ from{ filter:brightness(.18) saturate(.4); } }

/* ── footer ────────────────────────── */
.foot{
  display:flex; flex-wrap:wrap; align-items:baseline; justify-content:space-between;
  gap:8px 24px;
  padding:24px var(--gutter) 28px;
  color:var(--muted); font-size:14px;
}
.foot nav{ display:flex; gap:20px; }

/* ── privacy page ──────────────────── */
.doc{
  flex:1;
  width:100%; max-width:calc(68ch + 2 * var(--gutter));
  margin:0 auto;
  padding:clamp(24px, 6vh, 72px) var(--gutter) clamp(56px, 10vh, 112px);
}
.doc h1{
  margin:0;
  font-family:var(--display); font-weight:600;
  font-size:clamp(36px, 5vw, 56px);
  line-height:1.05; letter-spacing:-.025em;
}
.facts{
  display:flex; flex-wrap:wrap; gap:6px 32px;
  margin:20px 0 0; font-size:15px;
}
.facts div{ display:flex; gap:8px; }
.facts dt{ color:var(--muted); }
.facts dd{ margin:0; }
.preamble{ margin:32px 0 0; font-size:18px; line-height:1.6; }
.preamble .note{ color:var(--muted); }

.clauses{ list-style:none; margin:48px 0 0; padding:0; counter-reset:clause; }
.clauses > li{
  counter-increment:clause;
  display:grid; grid-template-columns:3ch 1fr; gap:0 20px;
  padding:22px 0;
  border-top:1px solid var(--faint);
}
.clauses > li::before{
  content:counter(clause, decimal-leading-zero);
  color:var(--muted); font-variant-numeric:tabular-nums;
  font-size:15px; line-height:1.9;
}
.clauses h2{
  margin:0; font-family:var(--display); font-weight:600;
  font-size:20px; line-height:1.4; letter-spacing:-.01em;
}
.clauses p{ margin:8px 0 0; }
.clauses ul{ margin:8px 0 0; padding-left:1.15em; }
.clauses ul li{ margin-top:6px; padding-left:.2em; }
.clauses ul li::marker{ color:var(--muted); }
.clauses strong{ font-weight:600; }
.clauses code{ font-family:inherit; font-size:.94em; color:var(--muted); }
.doc a{ text-underline-offset:4px; text-decoration-color:rgba(238,242,246,.4); }
.doc a:hover{ text-decoration-color:var(--ink); }

/* ── small screens ─────────────────── */
@media (max-width:720px){
  .top{ padding-top:18px; padding-bottom:18px; }
  .wordmark{ font-size:15px; }
  .top nav{ font-size:14px; }
  .apps{ grid-template-columns:1fr; gap:72px; }
  .app{ --size:min(52vw, 210px); }
  .foot{ flex-direction:column; }
}

@media (prefers-reduced-motion:reduce){
  .glow, .tile{ animation:none; transition:none; }
  a.app:hover .tile, a.app:focus-visible .tile{ transform:none; }
}