/* OpenDiscuss — single stylesheet, no build step. */

:root {
  --bg: #ffffff;
  --bg-alt: #f5f6f8;
  --surface: #ffffff;
  --text: #14171f;
  --text-muted: #5a6070;
  --border: #e3e6ec;
  --accent: #3b5bdb;
  --accent-hover: #2f4bc4;
  --accent-contrast: #ffffff;
  --shadow: 0 1px 2px rgba(20, 23, 31, .05), 0 8px 24px rgba(20, 23, 31, .06);
  --radius: 12px;
  --wrap: 1080px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1116;
    --bg-alt: #161922;
    --surface: #181c25;
    --text: #eceef3;
    --text-muted: #a0a7b8;
    --border: #262b37;
    --accent: #7d95ff;
    --accent-hover: #93a7ff;
    --accent-contrast: #0f1116;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .35);
  }
}

*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--accent); }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 68px;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 650;
  font-size: 1.05rem;
  letter-spacing: -.01em;
  color: var(--text);
  text-decoration: none;
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: .95rem;
}

.nav a {
  color: var(--text-muted);
  text-decoration: none;
}

.nav a:hover { color: var(--text); }
.nav .btn:hover { color: var(--accent-contrast); }

/* Buttons */

.btn {
  display: inline-block;
  background: var(--accent);
  color: var(--accent-contrast);
  border: 1px solid var(--accent);
  border-radius: 8px;
  padding: 12px 22px;
  font-weight: 600;
  font-size: .97rem;
  text-decoration: none;
  transition: background .15s ease, border-color .15s ease;
}

.btn:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn-small { padding: 8px 16px; font-size: .9rem; }

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

.btn-ghost:hover { background: var(--bg-alt); border-color: var(--text-muted); }

/* Hero */

.hero {
  padding: 96px 0 80px;
  text-align: center;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 20px;
  padding: 5px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-alt);
  color: var(--text-muted);
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .02em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 20px;
  font-size: clamp(2.1rem, 6vw, 3.6rem);
  line-height: 1.1;
  letter-spacing: -.03em;
  font-weight: 700;
}

.lede {
  max-width: 46ch;
  margin: 0 auto;
  color: var(--text-muted);
  font-size: 1.13rem;
}

.cta-row {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

/* Sections */

.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--border); }

h2 {
  margin: 0 0 40px;
  font-size: clamp(1.6rem, 3.6vw, 2.1rem);
  letter-spacing: -.02em;
  text-align: center;
  font-weight: 680;
}

/* Cards */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 22px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 26px;
  box-shadow: var(--shadow);
}

.card h3 {
  margin: 0 0 10px;
  font-size: 1.1rem;
  letter-spacing: -.01em;
}

.card p { margin: 0; color: var(--text-muted); font-size: .98rem; }

.card-icon {
  margin-bottom: 16px;
  color: var(--accent);
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .08em;
}

/* Contact */

.contact { text-align: center; }
.contact h2 { margin-bottom: 16px; }
.contact .btn { margin-top: 28px; }

/* Footer */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  color: var(--text-muted);
  font-size: .9rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.site-footer a { color: var(--text-muted); text-decoration: none; }
.site-footer a:hover { color: var(--text); }

@media (max-width: 560px) {
  .hero { padding: 64px 0 56px; }
  .section { padding: 60px 0; }
  .nav { gap: 16px; }
  .cta-row .btn { width: 100%; text-align: center; }
}