/* BigDesk landing — bigdesk.co
   Dark theme echoing the BigDesk app: slate-900 background, slate text, one blue accent. */

:root {
  --bg: #0f172a;          /* slate-900 */
  --bg-raised: #1e293b;   /* slate-800 */
  --border: #293548;      /* between slate-800 and slate-700 */
  --text: #f1f5f9;        /* slate-100 */
  --text-soft: #cbd5e1;   /* slate-300 */
  --text-muted: #94a3b8;  /* slate-400 */
  --accent: #3b82f6;      /* blue-500 */
  --accent-soft: #60a5fa; /* blue-400 */
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  background:
    radial-gradient(1100px 520px at 12% -8%, rgba(59, 130, 246, 0.10), transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  font-size: 16px;
  min-height: 100vh;
}

.page {
  max-width: 800px;
  margin: 0 auto;
  padding: 88px 24px 48px;
}

/* ---- Hero ---- */

.hero {
  margin-bottom: 72px;
}

.wordmark {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text-soft);
  margin-bottom: 28px;
}

.wordmark .accent {
  color: var(--accent-soft);
}

h1 {
  font-size: clamp(2rem, 5.5vw, 3rem);
  font-weight: 750;
  line-height: 1.12;
  letter-spacing: -0.025em;
  margin-bottom: 18px;
}

.lede {
  font-size: 1.2rem;
  color: var(--text-soft);
  max-width: 560px;
}

/* ---- Sections ---- */

.section-title {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 22px;
}

/* ---- Cards ---- */

.cards {
  margin-bottom: 72px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.card {
  background: rgba(30, 41, 59, 0.55); /* slate-800 @ 55% */
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 22px 20px;
}

.card h3 {
  font-size: 1rem;
  font-weight: 650;
  margin-bottom: 8px;
  color: var(--accent-soft);
}

.card p {
  font-size: 0.92rem;
  color: var(--text-soft);
}

/* ---- "Why did I get an email?" ---- */

.why {
  margin-bottom: 72px;
  border-left: 3px solid var(--accent);
  padding-left: 24px;
}

.why p {
  color: var(--text-soft);
  max-width: 640px;
}

.why p + p {
  margin-top: 14px;
}

.why em {
  color: var(--text);
  font-style: normal;
  font-weight: 600;
}

/* ---- Footer ---- */

.footer {
  border-top: 1px solid var(--border);
  padding-top: 28px;
}

.footer p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ---- Mobile ---- */

@media (max-width: 680px) {
  .page {
    padding: 56px 20px 40px;
  }

  .hero {
    margin-bottom: 56px;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .cards,
  .why {
    margin-bottom: 56px;
  }

  .why {
    padding-left: 18px;
  }
}