*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --purple: #8B5CF6;
  --purple-dark: #7C3AED;
  --purple-light: #EDE9FE;
  --blue: #06B6D4;
  --blue-dark: #0891B2;
  --blue-light: #CFFAFE;
  --white: #FFFFFF;
  --gray-50: #F9FAFB;
  --gray-100: #F3F4F6;
  --gray-200: #E5E7EB;
  --gray-400: #9CA3AF;
  --gray-600: #4B5563;
  --gray-800: #1F2937;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 4px 16px rgba(139, 92, 246, 0.1);
  --radius: 12px;
  --radius-sm: 8px;
  --max-width: 760px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--gray-50);
  color: var(--gray-800);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--blue-dark);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--purple-dark);
  text-decoration: underline;
}

/* Site header */
.site-header {
  background: linear-gradient(135deg, var(--purple) 0%, var(--blue) 100%);
  color: var(--white);
  padding: 28px 20px;
}

.site-header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand-icon {
  font-size: 32px;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.brand-text h1 {
  font-size: clamp(1.25rem, 4vw, 1.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-text p {
  font-size: 0.875rem;
  opacity: 0.9;
  margin-top: 4px;
}

/* Main content */
.main {
  flex: 1;
  padding: 32px 20px 48px;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.meta-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  font-size: 0.8125rem;
  color: var(--gray-600);
  margin-bottom: 24px;
}

.meta-bar span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: clamp(20px, 4vw, 32px);
  box-shadow: var(--shadow);
}

.card + .card {
  margin-top: 20px;
}

h1.page-title {
  font-size: clamp(1.5rem, 5vw, 2rem);
  font-weight: 700;
  color: var(--purple-dark);
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.lead {
  font-size: 1.0625rem;
  color: var(--gray-600);
  margin-bottom: 28px;
}

h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--purple-dark);
  margin-top: 32px;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--purple-light);
}

h2:first-of-type {
  margin-top: 0;
}

h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-800);
  margin-top: 20px;
  margin-bottom: 8px;
}

p {
  margin-bottom: 14px;
}

p:last-child {
  margin-bottom: 0;
}

ul,
ol {
  margin: 0 0 14px 1.25rem;
}

li {
  margin-bottom: 6px;
}

li:last-child {
  margin-bottom: 0;
}

code {
  font-family: "Consolas", "Courier New", monospace;
  font-size: 0.875em;
  background: var(--gray-100);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--purple-dark);
}

.highlight-box {
  background: var(--purple-light);
  border-left: 4px solid var(--purple);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 16px 20px;
  margin: 20px 0;
}

.highlight-box p {
  margin-bottom: 8px;
  font-size: 0.9375rem;
}

.highlight-box p:last-child {
  margin-bottom: 0;
}

.highlight-box strong {
  color: var(--purple-dark);
}

.permission-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 0.9375rem;
}

.permission-table th,
.permission-table td {
  text-align: left;
  padding: 12px 14px;
  border: 1px solid var(--gray-200);
}

.permission-table th {
  background: var(--gray-50);
  font-weight: 600;
  color: var(--purple-dark);
}

.permission-table tr:nth-child(even) td {
  background: var(--gray-50);
}

.toc {
  background: var(--blue-light);
  border: 1px solid rgba(6, 182, 212, 0.25);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  margin-bottom: 28px;
}

.toc h2 {
  margin-top: 0;
  margin-bottom: 12px;
  border-bottom: none;
  padding-bottom: 0;
  font-size: 1rem;
}

.toc ol {
  margin-bottom: 0;
  columns: 1;
}

.toc a {
  font-weight: 500;
}

.contact-card {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  padding: 20px;
  margin-top: 12px;
}

.contact-card p {
  margin-bottom: 6px;
}

/* Footer */
.site-footer {
  background: var(--white);
  border-top: 1px solid var(--gray-200);
  padding: 24px 20px;
  margin-top: auto;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-size: 0.8125rem;
  color: var(--gray-600);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-links a {
  font-weight: 500;
}

/* Responsive */
@media (min-width: 600px) {
  .toc ol {
    columns: 2;
    column-gap: 32px;
  }
}

@media (max-width: 480px) {
  .site-header {
    padding: 20px 16px;
  }

  .main {
    padding: 24px 16px 36px;
  }

  .permission-table {
    font-size: 0.8125rem;
  }

  .permission-table th,
  .permission-table td {
    padding: 10px;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}