:root {
  --bg: #0f1020;
  --panel: rgba(255, 255, 255, 0.08);
  --panel-strong: rgba(255, 255, 255, 0.13);
  --text: #f6f2ff;
  --muted: #cfc7df;
  --line: rgba(255, 255, 255, 0.17);
  --pink: #ff6fb1;
  --violet: #9d7cff;
  --cyan: #60e6d3;
  --yellow: #f8d66d;
  --danger: #ff8777;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.36);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top left, #2b184b 0, transparent 38rem), radial-gradient(circle at top right, #0d5c6f 0, transparent 30rem), var(--bg);
  line-height: 1.55;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }

.ambient {
  position: fixed;
  width: 28rem;
  height: 28rem;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.28;
  pointer-events: none;
  z-index: -1;
}
.ambient-one { background: var(--pink); top: 18%; left: -12rem; }
.ambient-two { background: var(--cyan); bottom: 12%; right: -10rem; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1rem, 4vw, 4rem);
  border-bottom: 1px solid var(--line);
  background: rgba(15, 16, 32, 0.76);
  backdrop-filter: blur(18px);
}
.brand { display: flex; align-items: center; gap: 0.75rem; font-weight: 900; letter-spacing: -0.04em; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 0.8rem;
  background: linear-gradient(135deg, var(--pink), var(--violet), var(--cyan));
  color: #111;
  font-size: 0.85rem;
}
.brand-text { font-size: 1.05rem; }
.nav { display: flex; gap: 1rem; color: var(--muted); font-size: 0.93rem; }
.nav a:hover { color: var(--text); }
.nav-toggle { display: none; }

.section-shell { width: min(1120px, calc(100% - 2rem)); margin: 0 auto; }
.hero { padding: 6.5rem 0 4rem; }
.version-pill, .eyebrow {
  color: var(--cyan);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.78rem;
  font-weight: 800;
}
.version-pill { margin-bottom: 1.2rem; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(18rem, 0.65fr); gap: 2rem; align-items: center; }
h1, h2, h3, p { margin-top: 0; }
h1 {
  max-width: 900px;
  margin-bottom: 1.25rem;
  font-size: clamp(3.2rem, 9vw, 7.9rem);
  line-height: 0.88;
  letter-spacing: -0.085em;
}
h2 { font-size: clamp(2rem, 5vw, 4.6rem); line-height: 0.95; letter-spacing: -0.07em; margin-bottom: 1rem; }
h3 { font-size: 1.3rem; line-height: 1.1; letter-spacing: -0.04em; margin-bottom: 0.8rem; }
.lead { max-width: 760px; color: var(--muted); font-size: clamp(1.1rem, 2vw, 1.35rem); }
.hero-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-top: 2rem; }
.button {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.9rem 1.2rem;
  font-weight: 800;
  cursor: pointer;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}
.button:hover { transform: translateY(-2px); }
.primary { background: linear-gradient(135deg, var(--pink), var(--violet)); color: white; border-color: transparent; }
.secondary { background: rgba(255, 255, 255, 0.06); }
.hero-card, .signal-card, .boundary-panel, .pledge-card, .tool-output {
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 2rem;
  box-shadow: var(--shadow);
  backdrop-filter: blur(22px);
}
.hero-card { padding: 1.4rem; transform: rotate(1.5deg); }
.card-label { color: var(--yellow); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.14em; font-weight: 900; margin-bottom: 1rem; }
.hero-card p:not(.small-note) { font-size: 1.45rem; line-height: 1.18; letter-spacing: -0.04em; font-weight: 800; }
.meter { height: 0.7rem; background: rgba(255, 255, 255, 0.1); border-radius: 999px; overflow: hidden; margin: 1.4rem 0 1rem; }
.meter span { display: block; width: 74%; height: 100%; background: linear-gradient(90deg, var(--cyan), var(--yellow), var(--pink)); border-radius: inherit; }
.small-note { color: var(--muted); font-size: 0.95rem; margin-bottom: 0; }

.split-section { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 2rem; padding: 5rem 0; border-top: 1px solid var(--line); }
.text-stack p { color: var(--muted); font-size: 1.13rem; }
.cards-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; padding-bottom: 5rem; }
.signal-card { padding: 1.35rem; min-height: 17rem; }
.signal-card p { color: var(--muted); margin-bottom: 0; }
.signal-number { display: inline-block; color: #111; background: var(--cyan); border-radius: 999px; padding: 0.25rem 0.55rem; font-size: 0.78rem; font-weight: 900; margin-bottom: 1.8rem; }

.boundary-section { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; padding: 5rem 0; border-top: 1px solid var(--line); }
.boundary-copy p { color: var(--muted); font-size: 1.05rem; }
.boundary-panel { padding: 1rem; display: grid; gap: 0.8rem; }
.panel-row { border-radius: 1.4rem; padding: 1rem; background: rgba(255, 255, 255, 0.07); border: 1px solid var(--line); }
.panel-row span { display: block; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.14em; font-weight: 900; margin-bottom: 0.35rem; }
.panel-row strong { font-size: 1.1rem; letter-spacing: -0.03em; }
.panel-row.good span { color: var(--cyan); }
.panel-row.warning span { color: var(--danger); }

.tool-section { padding: 5rem 0; border-top: 1px solid var(--line); }
.tool-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin-top: 1.5rem; }
.tool-card {
  text-align: left;
  min-height: 13rem;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.07);
  color: var(--text);
  border-radius: 1.5rem;
  padding: 1.1rem;
  cursor: pointer;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}
.tool-card:hover, .tool-card.active { transform: translateY(-3px); background: var(--panel-strong); border-color: rgba(255, 255, 255, 0.36); }
.tool-card span { color: var(--yellow); display: block; text-transform: uppercase; letter-spacing: 0.13em; font-weight: 900; font-size: 0.75rem; margin-bottom: 1rem; }
.tool-card strong { font-size: 1.05rem; line-height: 1.18; letter-spacing: -0.03em; }
.tool-output { margin-top: 1rem; padding: 1.25rem; color: var(--muted); }
.tool-output p { margin-bottom: 0; }

.pledge-section { padding: 5rem 0 6rem; }
.pledge-card { padding: clamp(1.4rem, 4vw, 3rem); background: linear-gradient(135deg, rgba(255,111,177,0.18), rgba(96,230,211,0.12)), var(--panel); }
.pledge-card p:not(.eyebrow) { color: var(--muted); font-size: 1.2rem; max-width: 850px; }
.copy-button { font-family: inherit; font-size: 1rem; margin-top: 0.5rem; }
.site-footer { border-top: 1px solid var(--line); padding: 1.3rem 1rem; color: var(--muted); text-align: center; font-size: 0.9rem; }
.site-footer p { margin: 0; }

@media (max-width: 820px) {
  .nav { position: absolute; right: 1rem; top: 4.4rem; flex-direction: column; min-width: 13rem; padding: 1rem; border: 1px solid var(--line); border-radius: 1.1rem; background: rgba(15, 16, 32, 0.94); transform: translateY(-0.8rem); opacity: 0; pointer-events: none; transition: 180ms ease; }
  .nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-toggle { display: inline-flex; border: 1px solid var(--line); background: rgba(255, 255, 255, 0.08); color: var(--text); border-radius: 999px; padding: 0.55rem 0.8rem; font-weight: 800; }
  .hero-grid, .split-section, .boundary-section { grid-template-columns: 1fr; }
  .hero { padding-top: 4.5rem; }
  .cards-grid, .tool-grid { grid-template-columns: 1fr; }
  .hero-card { transform: none; }
}