:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-alt: #eef4ff;
  --text: #0f172a;
  --muted: #475569;
  --primary: #0f62fe;
  --primary-dark: #0a4bcc;
  --border: #d9e2f0;
  --success: #087443;
  --success-bg: #ecfdf3;
  --error: #b42318;
  --error-bg: #fef3f2;
  --warning: #9a6700;
  --shadow: 0 18px 42px rgba(15, 23, 42, 0.08);
  --radius: 18px;
  --max-width: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: linear-gradient(180deg, #f8fbff 0%, var(--bg) 100%);
  color: var(--text);
}
a { color: var(--primary-dark); }
a:hover { text-decoration-thickness: 2px; }
img { max-width: 100%; display: block; }
code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.skip-link {
  position: absolute; left: 16px; top: -48px; background: var(--text); color: #fff; padding: 10px 14px; border-radius: 10px; z-index: 1000;
}
.skip-link:focus { top: 16px; }
.site-header {
  border-bottom: 1px solid rgba(15, 23, 42, 0.08);
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 50;
}
.wrap { width: min(var(--max-width), calc(100% - 32px)); margin: 0 auto; }
.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 88px;
}
.brand {
  display: flex; align-items: center; gap: 16px; text-decoration: none; color: inherit;
}
.brand-mark {
  width: 56px; height: 56px; border-radius: 16px; overflow: hidden; border: 1px solid var(--border); background: var(--surface);
}
.brand-text strong { display: block; font-size: 1.05rem; }
.brand-text span { color: var(--muted); font-size: 0.94rem; }
.nav { display: flex; flex-wrap: wrap; gap: 10px; }
.nav a {
  text-decoration: none; padding: 10px 14px; border-radius: 999px; border: 1px solid transparent; color: var(--text);
}
.nav a:hover, .nav a[aria-current="page"] {
  border-color: var(--border); background: #fff;
}
.hero {
  padding: 52px 0 26px;
}
.hero-panel, .card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.hero-panel {
  padding: 34px;
  display: grid;
  gap: 28px;
  grid-template-columns: 1.3fr 0.9fr;
}
.hero h1 { font-size: clamp(2rem, 4vw, 3.4rem); line-height: 1.05; margin: 0 0 14px; }
.lead { font-size: 1.08rem; color: var(--muted); max-width: 62ch; }
.hero-actions, .button-row { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px; border-radius: 14px; border: 1px solid var(--border);
  padding: 12px 16px; font-weight: 600; text-decoration: none; background: #fff; color: var(--text); cursor: pointer;
}
.btn.primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn.primary:hover { background: var(--primary-dark); }
.btn:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible, button:focus-visible {
  outline: 3px solid rgba(15,98,254,0.2); outline-offset: 2px;
}
.kpi-grid, .grid-2, .grid-3 {
  display: grid; gap: 18px;
}
.kpi-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.kpi, .card { padding: 22px; }
.kpi strong { display: block; font-size: 1.9rem; }
.kpi span { color: var(--muted); }
.section { padding: 20px 0 34px; }
.section-heading { margin-bottom: 18px; }
.section-heading h2 { margin: 0 0 8px; font-size: 1.75rem; }
.section-heading p { margin: 0; color: var(--muted); }
.field { display: grid; gap: 8px; }
.field label, legend { font-weight: 650; }
input, textarea, select {
  width: 100%; padding: 12px 14px; border-radius: 14px; border: 1px solid var(--border); background: #fff; color: var(--text); font: inherit;
}
textarea { min-height: 110px; resize: vertical; }
fieldset { border: 1px solid var(--border); border-radius: 16px; padding: 16px; }
legend { padding: 0 6px; }
.helper { color: var(--muted); font-size: 0.95rem; }
.result, .banner {
  border-radius: 14px; padding: 14px 16px; border: 1px solid var(--border);
}
.banner.success, .result.success { background: var(--success-bg); color: var(--success); border-color: #b7ebc6; }
.banner.error, .result.error { background: var(--error-bg); color: var(--error); border-color: #f4c7c3; }
.banner.info, .result.info { background: var(--surface-alt); color: var(--text); }
.pill {
  display: inline-flex; align-items: center; gap: 8px; border-radius: 999px; padding: 8px 12px; border: 1px solid var(--border); background: #fff; font-size: 0.92rem;
}
.list-clean { margin: 0; padding-left: 18px; }
.table-wrap { overflow: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 12px; border-bottom: 1px solid var(--border); }
th { background: #f8fbff; }
.footer {
  border-top: 1px solid rgba(15, 23, 42, 0.08); margin-top: 28px; background: #fff;
}
.footer-inner {
  display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap; padding: 28px 0 40px;
}
.small { font-size: 0.92rem; color: var(--muted); }
.hidden { display: none !important; }
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(15,23,42,0.48); display: grid; place-items: center; padding: 18px;
}
.modal {
  background: #fff; width: min(560px, 100%); border-radius: 22px; border: 1px solid var(--border); padding: 24px; box-shadow: var(--shadow);
}
.tag-row, .radio-row, .checkbox-row, .switch-row { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.challenge-card h3, .card h3 { margin-top: 0; }
.stat-callout {
  display: inline-flex; align-items: center; padding: 8px 12px; border-radius: 999px; background: #eff6ff; border: 1px solid #bfdbfe; font-weight: 600;
}
@media (max-width: 900px) {
  .hero-panel, .grid-2, .grid-3, .kpi-grid { grid-template-columns: 1fr; }
  .topbar { align-items: flex-start; padding: 14px 0; }
}