:root {
  --bg: #0b1220;
  --bg-soft: #131c2e;
  --card: #1a2438;
  --text: #eaf0fb;
  --muted: #9fb0cc;
  --accent: #4f9dff;
  --border: #26324b;
  --shadow: 0 10px 30px rgba(0, 0, 0, .35);
}
:root[data-theme="light"] {
  --bg: #f4f6fb;
  --bg-soft: #ffffff;
  --card: #ffffff;
  --text: #101828;
  --muted: #5a6b85;
  --accent: #1f6feb;
  --border: #dfe5ef;
  --shadow: 0 10px 30px rgba(16, 24, 40, .08);
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 50% -10%, var(--bg-soft), var(--bg)) fixed;
  color: var(--text);
  display: flex;
  flex-direction: column;
  min-height: 100%;
  -webkit-font-smoothing: antialiased;
}

.bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
}
.brand { font-weight: 800; letter-spacing: -.02em; font-size: 1.15rem; }
.brand .dot { color: var(--accent); }

.theme-toggle {
  width: 40px; height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  cursor: pointer;
  display: grid; place-items: center;
  transition: border-color .15s, transform .1s;
}
.theme-toggle:hover { border-color: var(--accent); }
.theme-toggle:active { transform: scale(.95); }
.theme-toggle__icon {
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--accent);
  box-shadow: inset -5px -5px 0 0 var(--card);
}
:root[data-theme="light"] .theme-toggle__icon { box-shadow: none; background: #f4b400; }

.hero {
  flex: 1;
  max-width: 760px;
  width: 100%;
  margin: 0 auto;
  padding: 6vh 22px 4vh;
  text-align: center;
}
.kicker {
  text-transform: uppercase;
  letter-spacing: .18em;
  font-size: .8rem;
  font-weight: 700;
  color: var(--accent);
  margin: 0 0 12px;
}
h1 {
  font-size: clamp(2rem, 6vw, 3.4rem);
  line-height: 1.05;
  letter-spacing: -.03em;
  margin: 0 0 18px;
}
.lede {
  font-size: clamp(1rem, 2.4vw, 1.2rem);
  color: var(--muted);
  margin: 0 auto 40px;
  max-width: 620px;
}

.countdown {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}
.cd-unit {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 18px 10px;
  min-width: 88px;
}
.cd-num {
  display: block;
  font-size: clamp(1.8rem, 6vw, 2.6rem);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  letter-spacing: -.02em;
}
.cd-lbl {
  display: block;
  margin-top: 6px;
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--muted);
}
.cd-done {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--accent);
}

.foot {
  text-align: center;
  padding: 24px 22px 32px;
  color: var(--muted);
  font-size: .85rem;
}
.foot p { margin: 0; }

a { color: var(--accent); }

@media (max-width: 420px) {
  .cd-unit { min-width: 70px; padding: 14px 8px; }
}