:root {
  --ink: #111;
  --paper: #f6f1e8;
  --cobalt: #f5f4f1;
  --mute: #6b675f;
  --display: "Outfit", sans-serif;
  --sans: "Outfit", sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--ink); color: var(--paper); font-family: var(--sans); }
a { color: inherit; text-decoration: none; }
.app {
  width: min(440px, 100%);
  margin: 0 auto;
  min-height: 100dvh;
  padding: 1.1rem 1.15rem 2.4rem;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}
.top { display: flex; justify-content: space-between; gap: 0.75rem; margin-bottom: 1.3rem; }
.eyebrow { font-size: 0.62rem; letter-spacing: 0.18em; text-transform: uppercase; color: #c8c5bd; }
.eyebrow.dim { color: #b7b2a7; margin-top: 0.2rem; }
.top-actions { display: flex; gap: 0.4rem; }
.top a, .install {
  display: inline-flex;
  align-items: center;
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--paper);
  border: 1px solid rgba(255,255,255,0.2);
  padding: 0.4rem 0.5rem;
  background: transparent;
  cursor: pointer;
  white-space: nowrap;
}
.install[hidden] { display: none; }
h1 {
  font-family: var(--display);
  font-size: clamp(2rem, 8vw, 2.6rem);
  letter-spacing: -0.04em;
  line-height: 1;
  margin: 0 0 0.55rem;
}
.sub { color: #d4cfc2; margin: 0 0 1.2rem; font-size: 0.98rem; }
.modes { display: grid; grid-template-columns: 1fr 1fr; gap: 0.45rem; margin-bottom: 1rem; }
.modes button {
  background: transparent;
  color: #d4cfc2;
  border: 1px solid rgba(255,255,255,0.18);
  padding: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.72rem;
  cursor: pointer;
}
.modes button[aria-pressed="true"] { background: #f5f4f1; color: #111; border-color: #f5f4f1; }
.progress { height: 3px; background: rgba(255,255,255,0.12); margin-bottom: 1rem; }
.progress span { display: block; height: 100%; background: #f5f4f1; width: 0; transition: width 0.3s ease; }
.card {
  border: 1px solid rgba(255,255,255,0.12);
  padding: 1.2rem 1.1rem;
  background: #181818;
  min-height: 260px;
  display: flex;
  flex-direction: column;
  border-radius: 16px;
}
.num { font-family: var(--sans); font-weight: 600; color: #c8c5bd; letter-spacing: 0.08em; }
.cluster-label { font-size: 0.66rem; letter-spacing: 0.16em; text-transform: uppercase; color: #c8c5bd; margin: 0.7rem 0 0.4rem; }
.card h2 { font-family: var(--display); font-size: 1.55rem; letter-spacing: -0.03em; line-height: 1.1; margin: 0 0 0.7rem; }
.card p { color: #d4cfc2; margin: 0; flex: 1; }
.principle {
  margin-top: 1rem;
  padding-top: 0.8rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-family: var(--display);
  font-size: 1.1rem;
  color: #fff;
}
.nav-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; margin-top: 0.85rem; }
.nav-row button {
  min-height: 2.8rem;
  border: 1px solid rgba(255,255,255,0.2);
  background: transparent;
  color: var(--paper);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.72rem;
  cursor: pointer;
}
.nav-row button.primary { background: #f5f4f1; border-color: #f5f4f1; color: #111; }
.nav-row button:disabled { opacity: 0.35; }
.grid { display: none; grid-template-columns: 1fr 1fr; gap: 0.5rem; }
.app.is-grid .card,
.app.is-grid .nav-row,
.app.is-grid .progress { display: none; }
.app.is-grid .grid { display: grid; }
.tile {
  text-align: left;
  border: 1px solid rgba(255,255,255,0.12);
  background: #181818;
  color: var(--paper);
  padding: 0.75rem;
  min-height: 6.2rem;
  cursor: pointer;
  border-radius: 12px;
}
.tile b { display: block; color: #c8c5bd; font-size: 0.85rem; letter-spacing: 0.08em; }
.tile span { display: block; margin-top: 0.35rem; font-size: 0.82rem; color: #d4cfc2; }
.rule { margin-top: 1.5rem; padding-top: 1rem; border-top: 1px solid rgba(255,255,255,0.12); }
.rule strong { display: block; font-family: var(--display); font-size: 1.2rem; margin-bottom: 0.35rem; }
.rule p { margin: 0; color: #b7b2a7; font-size: 0.9rem; }
.credit { margin-top: auto; padding-top: 1.5rem; font-size: 0.68rem; letter-spacing: 0.14em; text-transform: uppercase; color: #8c877c; }
.credit a { color: #f5f4f1; }