:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --surface-alt: #f0f2f5;
  --border: #e2e5ea;
  --text: #1a1d23;
  --text-muted: #6b7280;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --green: #16a34a;
  --red: #dc2626;
  --amber: #d97706;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --surface: #171a21;
    --surface-alt: #1e222b;
    --border: #2a2f3a;
    --text: #e7e9ee;
    --text-muted: #9aa1ad;
    --accent: #3b82f6;
    --accent-hover: #60a5fa;
    --shadow: 0 1px 3px rgba(0,0,0,0.4), 0 1px 2px rgba(0,0,0,0.3);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

header.topbar {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  max-width: 1100px;
  margin: 0 auto;
}

.brand {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  letter-spacing: -0.02em;
}

.nav-links { display: flex; gap: 20px; align-items: center; }
.nav-links a { color: var(--text-muted); font-size: 0.92rem; font-weight: 500; }
.nav-links a:hover { color: var(--text); }
.nav-links .role-badge {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--surface-alt);
  color: var(--text-muted);
}

main { padding: 40px 0 64px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 24px;
}

.card h2, .card h3 { margin-top: 0; }

h1 { font-size: 1.9rem; letter-spacing: -0.02em; margin: 0 0 8px; }
h2 { font-size: 1.3rem; letter-spacing: -0.01em; }
.subtitle { color: var(--text-muted); margin-bottom: 32px; }

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 10px 18px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
}
.btn:hover { background: var(--accent-hover); color: #fff; }
.btn.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}
.btn.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.btn.btn-danger { background: var(--red); }
.btn.btn-danger:hover { background: #b91c1c; }
.btn.btn-sm { padding: 6px 12px; font-size: 0.82rem; }

form.stacked label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin: 16px 0 6px;
  color: var(--text-muted);
}
form.stacked input, form.stacked textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
}
form.stacked input:focus, form.stacked textarea:focus {
  outline: none;
  border-color: var(--accent);
}
form.stacked .actions { margin-top: 24px; }

.flash {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 20px;
  font-size: 0.92rem;
}
.flash.error { background: rgba(220,38,38,0.1); color: var(--red); border: 1px solid rgba(220,38,38,0.25); }
.flash.success { background: rgba(22,163,74,0.1); color: var(--green); border: 1px solid rgba(22,163,74,0.25); }
.flash.info { background: rgba(37,99,235,0.1); color: var(--accent); border: 1px solid rgba(37,99,235,0.25); }

table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { color: var(--text-muted); font-weight: 600; font-size: 0.76rem; text-transform: uppercase; letter-spacing: 0.03em; }
tbody tr:hover { background: var(--surface-alt); }
.table-wrap { overflow-x: auto; }

.funnel { display: flex; flex-wrap: wrap; gap: 12px; }
.funnel-step {
  background: var(--surface-alt);
  border-radius: var(--radius);
  padding: 16px 20px;
  min-width: 140px;
  flex: 1;
}
.funnel-step .num { font-size: 1.6rem; font-weight: 700; letter-spacing: -0.02em; }
.funnel-step .label { color: var(--text-muted); font-size: 0.8rem; margin-top: 2px; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 0.74rem; font-weight: 600; }
.badge.green { background: rgba(22,163,74,0.12); color: var(--green); }
.badge.red { background: rgba(220,38,38,0.12); color: var(--red); }
.badge.amber { background: rgba(217,119,6,0.12); color: var(--amber); }
.badge.gray { background: var(--surface-alt); color: var(--text-muted); }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 16px; }
.stat-tile { background: var(--surface-alt); border-radius: var(--radius); padding: 16px 18px; }
.stat-tile .num { font-size: 1.4rem; font-weight: 700; }
.stat-tile .label { color: var(--text-muted); font-size: 0.78rem; margin-top: 4px; }

.empty-state { color: var(--text-muted); padding: 32px; text-align: center; }

.landing-hero { text-align: center; padding: 80px 0 40px; }
.landing-hero h1 { font-size: 2.4rem; }
.landing-hero p { color: var(--text-muted); font-size: 1.05rem; max-width: 520px; margin: 0 auto 32px; }

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

.quiet-links { display: flex; gap: 24px; margin-top: 40px; flex-wrap: wrap; }
.section-nav { display: flex; gap: 10px; margin-bottom: 24px; flex-wrap: wrap; }
.section-nav a {
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 500;
}
.section-nav a.active { border-color: var(--accent); color: var(--accent); }

footer.site-footer {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
  padding: 32px 0;
}