:root {
  --site-bg: #f3f7fc;
  --site-surface: #ffffff;
  --site-line: #dbe4f2;
  --site-text: #0f172a;
  --site-muted: #475569;
  --site-brand: #0b5bd3;
  --site-brand-dark: #003d99;
}

* {
  box-sizing: border-box;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 60;
  border-bottom: 1px solid var(--site-line);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
}

.site-shell {
  max-width: 1120px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.site-brand {
  text-decoration: none;
  color: var(--site-brand);
  font-family: 'Manrope', sans-serif;
  font-weight: 800;
  font-size: 24px;
  letter-spacing: -0.02em;
}

.site-login {
  text-decoration: none;
  color: #ffffff;
  background: linear-gradient(135deg, #0053dc 0%, #3e76fe 100%);
  font-family: 'Manrope', sans-serif;
  font-weight: 700;
  font-size: 13px;
  border-radius: 999px;
  padding: 9px 16px;
  margin-left: auto;
}

.site-footer {
  border-top: 1px solid var(--site-line);
  background: #ffffff;
  margin-top: 40px;
}

.site-footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 28px 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 20px;
  align-items: center;
}

.site-footer-title {
  font-family: 'Manrope', sans-serif;
  font-size: 20px;
  font-weight: 800;
  color: #0f172a;
  margin: 0 0 6px;
}

.site-footer-desc,
.site-footer-copy {
  color: var(--site-muted);
  margin: 0;
  font-size: 14px;
}

.site-footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
  justify-content: flex-end;
}

.site-footer-links a {
  text-decoration: none;
  color: var(--site-muted);
  font-size: 14px;
}

.site-footer-links a[aria-current='page'] {
  color: var(--site-brand-dark);
  font-weight: 700;
}

.doc-page {
  margin: 0;
  background: linear-gradient(180deg, #f8fbff 0%, #f3f7fc 100%);
  color: var(--site-text);
  font-family: 'Be Vietnam Pro', sans-serif;
  line-height: 1.6;
}

.doc-main {
  max-width: 980px;
  margin: 0 auto;
  padding: 104px 24px 0;
}

.doc-card {
  background: var(--site-surface);
  border: 1px solid var(--site-line);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 10px 30px rgba(2, 32, 89, 0.06);
}

.doc-badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  background: #e8f1ff;
  color: #0d469f;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  margin-bottom: 10px;
}

.doc-card h1,
.doc-card h2,
.doc-card h3 {
  margin: 0 0 12px;
  font-family: 'Manrope', sans-serif;
  line-height: 1.25;
}

.doc-card h1 {
  font-size: clamp(28px, 4vw, 40px);
  margin-bottom: 8px;
}

.doc-card h2 {
  font-size: clamp(22px, 2.6vw, 28px);
  margin-top: 24px;
}

.doc-card h3 {
  font-size: 20px;
  margin-top: 20px;
}

.doc-card p,
.doc-card li {
  color: var(--site-muted);
}

.doc-lead {
  margin-top: 0;
  font-size: 16px;
}

.doc-grid {
  display: grid;
  gap: 16px;
}

.doc-grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.doc-note {
  border-left: 4px solid var(--site-brand);
  background: #edf4ff;
  color: #0d3f97;
  padding: 12px 14px;
  border-radius: 8px;
  font-size: 14px;
}

.doc-status-ok {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: #065f46;
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  padding: 8px 12px;
  border-radius: 999px;
  margin-bottom: 8px;
}

.doc-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #10b981;
}

.doc-code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', monospace;
  background: #0f172a;
  color: #e2e8f0;
  border-radius: 10px;
  padding: 12px;
  overflow-x: auto;
  font-size: 13px;
}

.doc-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border: 1px solid var(--site-line);
  border-radius: 10px;
  overflow: hidden;
}

.doc-table th,
.doc-table td {
  text-align: left;
  vertical-align: top;
  padding: 10px;
  border-bottom: 1px solid var(--site-line);
  font-size: 14px;
}

.doc-table th {
  color: #0f172a;
  background: #f6f9ff;
  font-weight: 700;
}

.support-form {
  display: grid;
  gap: 14px;
  margin-top: 12px;
}

.form-field {
  display: grid;
  gap: 6px;
}

.form-label {
  font-size: 14px;
  font-weight: 600;
  color: #334155;
}

.form-input,
.form-textarea {
  width: 100%;
  border: 1px solid var(--site-line);
  border-radius: 10px;
  background: #f8fbff;
  color: var(--site-text);
  padding: 10px 12px;
  font-size: 14px;
  font-family: 'Be Vietnam Pro', sans-serif;
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: #99b9f0;
  box-shadow: 0 0 0 3px rgba(11, 91, 211, 0.12);
}

.form-textarea {
  min-height: 140px;
  resize: vertical;
}

.form-submit {
  display: inline-block;
  border: 0;
  border-radius: 10px;
  padding: 11px 16px;
  background: linear-gradient(135deg, #0053dc 0%, #3e76fe 100%);
  color: #ffffff;
  font-family: 'Manrope', sans-serif;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
}

.form-help {
  margin: 0;
  font-size: 13px;
  color: var(--site-muted);
}

@media (max-width: 900px) {
  .site-shell {
    flex-wrap: wrap;
    padding: 12px 16px;
  }

  .site-login {
    margin-left: auto;
  }

  .site-footer-inner {
    grid-template-columns: 1fr;
    padding: 24px 16px;
  }

  .site-footer-links {
    justify-content: flex-start;
  }

  .doc-main {
    padding: 132px 16px 0;
  }

  .doc-grid-2 {
    grid-template-columns: 1fr;
  }
}