:root {
  --concur-primary: #0F1117;
  --concur-surface: #171A23;
  --concur-raised: #1E222E;
  --concur-accent: #5B8CFF;
  --concur-accent-hover: #4A7AEE;
  --concur-gold: #FBBF24;
  --concur-text: #E8EEF4;
  --concur-text-dim: #9CA3AF;
  --concur-line: #2A2F3D;
  --concur-success: #10B981;
  --concur-warning: #F59E0B;
  --concur-error: #EF4444;
  --concur-max: 78rem;
  --concur-radius: 8px;
  --concur-radius-lg: 16px;
  --concur-font: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --concur-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
  --concur-shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.6);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
[id] { scroll-margin-top: 5rem; }

body {
  margin: 0;
  font-family: var(--concur-font);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--concur-text);
  background: var(--concur-primary);
}

a {
  color: var(--concur-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
a:hover { color: var(--concur-gold); }

img { max-width: 100%; height: auto; display: block; }

.concur-shell { min-height: 100vh; display: flex; flex-direction: column; }

.concur-skip {
  position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden;
}
.concur-skip:focus {
  position: fixed; left: 1rem; top: 1rem; width: auto; height: auto;
  padding: 0.5rem 1rem; background: var(--concur-accent); color: #fff; z-index: 200;
  border-radius: var(--concur-radius);
}

.concur-strip {
  background: var(--concur-surface);
  color: var(--concur-text-dim);
  font-size: 0.8rem;
  border-bottom: 1px solid var(--concur-line);
}
.concur-strip__inner {
  max-width: var(--concur-max); margin: 0 auto; padding: 0.5rem 1.25rem;
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.5rem;
}
.concur-strip a { color: var(--concur-gold); text-decoration: none; font-weight: 600; }
.concur-strip a:hover { color: #fff; }

.concur-head {
  background: var(--concur-surface);
  border-bottom: 1px solid var(--concur-line);
  position: sticky; top: 0; z-index: 50;
  box-shadow: var(--concur-shadow);
}
.concur-head::after {
  content: ""; display: block; height: 2px;
  background: linear-gradient(90deg, var(--concur-accent), var(--concur-gold), var(--concur-accent));
}
.concur-head__inner {
  max-width: var(--concur-max); margin: 0 auto; padding: 1rem 1.25rem;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
}
.concur-logo {
  display: flex; align-items: center; gap: 0.75rem;
  text-decoration: none; color: var(--concur-text); font-weight: 800; font-size: 1.1rem;
}
.concur-logo:hover { color: var(--concur-accent); }
.concur-logo img { width: 42px; height: 42px; border-radius: var(--concur-radius); }

.concur-burger {
  display: none; background: var(--concur-accent); color: #fff; border: 0;
  padding: 0.5rem 1rem; border-radius: 999px; font-weight: 600; cursor: pointer;
}

.concur-nav ul {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-wrap: wrap; gap: 0.3rem; align-items: center;
}
.concur-nav a {
  text-decoration: none; color: var(--concur-text-dim); font-weight: 600; font-size: 0.875rem;
  padding: 0.5rem 0.9rem; border-radius: 999px; transition: background 150ms, color 150ms;
}
.concur-nav a:hover, .concur-nav a[aria-current="page"] {
  color: var(--concur-text); background: var(--concur-raised);
}
.concur-nav a.concur-nav__cta {
  background: var(--concur-accent); color: #fff;
}
.concur-nav a.concur-nav__cta:hover {
  background: var(--concur-accent-hover);
}

.concur-main {
  flex: 1; width: 100%; max-width: var(--concur-max);
  margin: 0 auto; padding: 0 1.25rem 4rem;
}

.concur-btn {
  display: inline-block; padding: 0.7rem 1.5rem; border-radius: 999px;
  font-weight: 700; font-size: 0.9rem; text-decoration: none; border: 2px solid transparent;
  cursor: pointer; font-family: inherit; transition: transform 150ms, box-shadow 150ms;
}
.concur-btn--primary {
  background: var(--concur-accent);
  color: #fff; border-color: var(--concur-accent);
  box-shadow: 0 4px 16px rgba(91, 140, 255, 0.3);
}
.concur-btn--primary:hover {
  transform: translateY(-2px);
  background: var(--concur-accent-hover);
  color: #fff;
}
.concur-btn--gold {
  background: var(--concur-gold);
  color: var(--concur-primary); border-color: var(--concur-gold);
  box-shadow: 0 4px 16px rgba(251, 191, 36, 0.3);
}
.concur-btn--gold:hover {
  transform: translateY(-2px);
  color: var(--concur-primary);
}
.concur-btn--ghost {
  background: transparent; color: var(--concur-text); border-color: var(--concur-line);
}
.concur-btn--ghost:hover { background: var(--concur-raised); color: var(--concur-text); }

.concur-hero {
  margin: 0 -1.25rem 3rem;
  background: linear-gradient(145deg, var(--concur-surface) 0%, var(--concur-raised) 100%);
  border-radius: 0 0 var(--concur-radius-lg) var(--concur-radius-lg);
  overflow: hidden;
  box-shadow: var(--concur-shadow-lg);
  padding: 3rem 1.5rem 2.5rem;
}
.concur-hero h1 {
  margin: 0 0 1rem; font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800; line-height: 1.2; color: #fff;
}
.concur-hero p {
  margin: 0 0 2rem; font-size: 1.15rem; color: var(--concur-text-dim);
  max-width: 48rem;
}
.concur-hero__actions {
  display: flex; flex-wrap: wrap; gap: 1rem;
}

.concur-section {
  margin-bottom: 3rem;
}
.concur-section h2 {
  margin: 0 0 0.5rem; font-size: 1.85rem; font-weight: 800;
  color: #fff; line-height: 1.3;
}
.concur-section h3 {
  margin: 0 0 0.5rem; font-size: 1.4rem; font-weight: 700;
  color: #fff; line-height: 1.3;
}
.concur-section h4 {
  margin: 0 0 0.5rem; font-size: 1.15rem; font-weight: 700;
  color: var(--concur-text); line-height: 1.4;
}
.concur-section p {
  margin: 0 0 1rem; color: var(--concur-text-dim);
}
.concur-section ul, .concur-section ol {
  margin: 0 0 1rem; padding-left: 1.5rem;
  color: var(--concur-text-dim);
}
.concur-section li {
  margin-bottom: 0.5rem;
}

.concur-card {
  background: var(--concur-surface);
  border: 1px solid var(--concur-line);
  border-radius: var(--concur-radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--concur-shadow);
}
.concur-card h3 {
  margin-top: 0;
}

.concur-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.concur-feature {
  background: var(--concur-surface);
  border: 1px solid var(--concur-line);
  border-radius: var(--concur-radius);
  padding: 1.5rem;
  transition: transform 150ms, box-shadow 150ms;
}
.concur-feature:hover {
  transform: translateY(-4px);
  box-shadow: var(--concur-shadow-lg);
}
.concur-feature__icon {
  width: 48px; height: 48px;
  background: var(--concur-accent);
  border-radius: var(--concur-radius);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 1rem;
  font-size: 1.5rem;
}
.concur-feature h3 {
  margin: 0 0 0.5rem; font-size: 1.2rem;
}
.concur-feature p {
  margin: 0; font-size: 0.95rem;
}

.concur-table-wrap {
  overflow-x: auto;
  margin-bottom: 2rem;
  border-radius: var(--concur-radius);
  border: 1px solid var(--concur-line);
}
.concur-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--concur-surface);
}
.concur-table thead {
  background: var(--concur-raised);
}
.concur-table th {
  padding: 1rem;
  text-align: left;
  font-weight: 700;
  color: #fff;
  border-bottom: 2px solid var(--concur-line);
}
.concur-table td {
  padding: 1rem;
  border-bottom: 1px solid var(--concur-line);
  color: var(--concur-text-dim);
}
.concur-table tbody tr:hover {
  background: var(--concur-raised);
}

.concur-stat {
  background: var(--concur-surface);
  border: 1px solid var(--concur-line);
  border-radius: var(--concur-radius);
  padding: 1.5rem;
  text-align: center;
}
.concur-stat__value {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--concur-accent);
  line-height: 1;
  margin-bottom: 0.5rem;
}
.concur-stat__label {
  font-size: 0.9rem;
  color: var(--concur-text-dim);
  font-weight: 600;
}

.concur-chart {
  background: var(--concur-surface);
  border: 1px solid var(--concur-line);
  border-radius: var(--concur-radius);
  padding: 1.5rem;
  margin-bottom: 2rem;
}
.concur-chart img {
  width: 100%;
  border-radius: var(--concur-radius);
}

.concur-faq {
  margin-bottom: 3rem;
}
.concur-faq__item {
  background: var(--concur-surface);
  border: 1px solid var(--concur-line);
  border-radius: var(--concur-radius);
  padding: 1.5rem;
  margin-bottom: 1rem;
}
.concur-faq__q {
  margin: 0 0 0.75rem;
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
}
.concur-faq__a {
  margin: 0;
  color: var(--concur-text-dim);
  line-height: 1.7;
}

.concur-alert {
  background: var(--concur-raised);
  border-left: 4px solid var(--concur-accent);
  padding: 1rem 1.25rem;
  border-radius: var(--concur-radius);
  margin-bottom: 1.5rem;
}
.concur-alert--warning {
  border-left-color: var(--concur-warning);
}
.concur-alert--success {
  border-left-color: var(--concur-success);
}
.concur-alert--error {
  border-left-color: var(--concur-error);
}

.concur-breadcrumb {
  margin: 1.5rem 0;
  font-size: 0.875rem;
}
.concur-breadcrumb a {
  color: var(--concur-text-dim);
  text-decoration: none;
}
.concur-breadcrumb a:hover {
  color: var(--concur-accent);
}
.concur-breadcrumb span {
  margin: 0 0.5rem;
  color: var(--concur-line);
}

.concur-footer {
  background: var(--concur-surface);
  border-top: 1px solid var(--concur-line);
  margin-top: auto;
  padding: 3rem 0 1.5rem;
}
.concur-footer__inner {
  max-width: var(--concur-max);
  margin: 0 auto;
  padding: 0 1.25rem;
}
.concur-footer__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}
.concur-footer h4 {
  margin: 0 0 1rem;
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
}
.concur-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.concur-footer li {
  margin-bottom: 0.5rem;
}
.concur-footer a {
  color: var(--concur-text-dim);
  text-decoration: none;
  font-size: 0.9rem;
}
.concur-footer a:hover {
  color: var(--concur-accent);
}
.concur-footer__bottom {
  border-top: 1px solid var(--concur-line);
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--concur-text-dim);
}

@media (max-width: 768px) {
  .concur-burger {
    display: block;
  }
  .concur-nav {
    display: none;
  }
  .concur-hero h1 {
    font-size: 1.8rem;
  }
  .concur-grid {
    grid-template-columns: 1fr;
  }
}