/* New API Static Site - Common Styles */
/* Mirrors Semi UI design system variables with fallback defaults */

/* ==================== CSS Variables ==================== */
:root {
  /* Semi UI color tokens - defaults for light mode */
  --semi-color-text-0: #1c1c1c;
  --semi-color-text-1: rgba(0, 0, 0, 0.6);
  --semi-color-text-2: rgba(0, 0, 0, 0.35);
  --semi-color-text-3: rgba(0, 0, 0, 0.25);

  --semi-color-bg-0: #ffffff;
  --semi-color-bg-1: rgba(128, 128, 128, 0.04);
  --semi-color-bg-2: rgba(128, 128, 128, 0.08);
  --semi-color-bg-3: rgba(128, 128, 128, 0.12);
  --semi-color-bg-4: rgba(128, 128, 128, 0.16);

  --semi-color-border: rgba(128, 128, 128, 0.2);
  --semi-color-border-hover: rgba(128, 128, 128, 0.35);

  --semi-color-primary: #3b82f6;
  --semi-color-primary-hover: #2563eb;
  --semi-color-primary-disabled: rgba(59, 130, 246, 0.5);

  --semi-color-secondary: #14b8a6;
  --semi-color-positive: #10b981;
  --semi-color-warning: #f59e0b;
  --semi-color-danger: #ef4444;

  /* Typography */
  --semi-font-size: 14px;
  --semi-font-size-h1: 48px;
  --semi-font-size-h2: 40px;
  --semi-font-size-h3: 32px;
  --semi-font-size-h4: 24px;
  --semi-font-size-h5: 18px;
  --semi-font-size-h6: 16px;

  --semi-line-height: 1.5715;
  --semi-line-height-tight: 1.25;

  /* Spacing */
  --semi-spacing-tight: 8px;
  --semi-spacing-tightest: 4px;
  --semi-spacing-loose: 16px;
  --semi-spacing-looser: 24px;
  --semi-spacing-extra-loose: 32px;

  /* Border radius */
  --semi-border-radius: 4px;
  --semi-border-radius-lg: 8px;
  --semi-border-radius-round: 999px;

  /* Shadows */
  --semi-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  --semi-shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.12);
  --semi-shadow-xl: 0 8px 24px rgba(0, 0, 0, 0.16);

  /* Transitions */
  --semi-transition: all 0.2s ease;

  /* Z-index layers */
  --semi-z-index-page: 1;
  --semi-z-index-sticky: 100;
  --semi-z-index-fixed: 200;
  --semi-z-index-modal-backdrop: 900;
  --semi-z-index-modal: 1000;
  --semi-z-index-popover: 1100;
  --semi-z-index-tooltip: 1200;

  /* Layout */
  --container-max-width: 1200px;
  --content-max-width: 720px;
}

/* Dark mode overrides */
html.dark {
  --semi-color-text-0: rgba(255, 255, 255, 0.9);
  --semi-color-text-1: rgba(255, 255, 255, 0.7);
  --semi-color-text-2: rgba(255, 255, 255, 0.5);
  --semi-color-text-3: rgba(255, 255, 255, 0.35);

  --semi-color-bg-0: #1c1c1c;
  --semi-color-bg-1: rgba(255, 255, 255, 0.06);
  --semi-color-bg-2: rgba(255, 255, 255, 0.1);
  --semi-color-bg-3: rgba(255, 255, 255, 0.14);
  --semi-color-bg-4: rgba(255, 255, 255, 0.18);

  --semi-color-border: rgba(255, 255, 255, 0.12);
  --semi-color-border-hover: rgba(255, 255, 255, 0.25);

  --semi-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
  --semi-shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.4);
  --semi-shadow-xl: 0 8px 24px rgba(0, 0, 0, 0.5);
}

/* ==================== Reset & Base ==================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB',
    'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: var(--semi-font-size);
  line-height: var(--semi-line-height);
  color: var(--semi-color-text-0);
  background-color: var(--semi-color-bg-0);
  min-height: 100vh;
  transition: var(--semi-transition);
}

a {
  color: var(--semi-color-primary);
  text-decoration: none;
  transition: var(--semi-transition);
}

a:hover {
  color: var(--semi-color-primary-hover);
}

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

/* ==================== Typography ==================== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: var(--semi-line-height-tight);
  color: var(--semi-color-text-0);
}

h1 { font-size: var(--semi-font-size-h1); }
h2 { font-size: var(--semi-font-size-h2); }
h3 { font-size: var(--semi-font-size-h3); }
h4 { font-size: var(--semi-font-size-h4); }
h5 { font-size: var(--semi-font-size-h5); }
h6 { font-size: var(--semi-font-size-h6); }

p {
  margin-bottom: var(--semi-spacing-loose);
  color: var(--semi-color-text-1);
}

.text-tertiary {
  color: var(--semi-color-text-2);
}

/* ==================== Layout ==================== */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--semi-spacing-looser);
}

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

/* ==================== Navigation ==================== */
.nav {
  position: sticky;
  top: 0;
  z-index: var(--semi-z-index-sticky);
  background: var(--semi-color-bg-0);
  border-bottom: 1px solid var(--semi-color-border);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--semi-spacing-looser);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--semi-spacing-loose);
  font-size: 18px;
  font-weight: 600;
  color: var(--semi-color-text-0);
}

.nav-brand img {
  height: 32px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--semi-spacing-loose);
  list-style: none;
}

.nav-link {
  padding: var(--semi-spacing-tight) var(--semi-spacing-loose);
  color: var(--semi-color-text-1);
  font-size: 15px;
  border-radius: var(--semi-border-radius);
  transition: var(--semi-transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--semi-color-text-0);
  background: var(--semi-color-bg-1);
}

/* ==================== Header ==================== */
.page-header {
  text-align: center;
  padding: var(--semi-spacing-extra-loose) var(--semi-spacing-looser);
  background: var(--semi-color-bg-1);
  border-bottom: 1px solid var(--semi-color-border);
}

.page-header h1 {
  margin-bottom: var(--semi-spacing-tight);
}

.page-header p {
  font-size: 18px;
  color: var(--semi-color-text-2);
  margin: 0;
}

/* ==================== Cards ==================== */
.card {
  background: var(--semi-color-bg-1);
  border: 1px solid var(--semi-color-border);
  border-radius: var(--semi-border-radius-lg);
  padding: var(--semi-spacing-looser);
  transition: var(--semi-transition);
}

.card:hover {
  border-color: var(--semi-color-border-hover);
  box-shadow: var(--semi-shadow);
}

/* ==================== Buttons ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--semi-spacing-tight);
  padding: 10px 24px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--semi-border-radius-round);
  border: none;
  cursor: pointer;
  transition: var(--semi-transition);
  text-decoration: none;
}

.btn:hover {
  opacity: 0.85;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--semi-color-primary);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--semi-color-text-0);
  border: 1px solid var(--semi-color-border);
}

.btn-outline:hover {
  border-color: var(--semi-color-primary);
  color: var(--semi-color-primary);
}

/* ==================== Footer ==================== */
.footer {
  margin-top: auto;
  padding: var(--semi-spacing-looser) 0;
  border-top: 1px solid var(--semi-color-border);
  text-align: center;
  color: var(--semi-color-text-2);
  font-size: 13px;
}

/* ==================== Markdown Content ==================== */
.markdown-body {
  line-height: 1.8;
}

.markdown-body h1 {
  font-size: 28px;
  margin: 32px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--semi-color-border);
}

.markdown-body h2 {
  font-size: 22px;
  margin: 28px 0 14px;
}

.markdown-body h3 {
  font-size: 18px;
  margin: 24px 0 12px;
}

.markdown-body p {
  margin-bottom: 16px;
  color: var(--semi-color-text-1);
}

.markdown-body ul, .markdown-body ol {
  margin: 16px 0;
  padding-left: 24px;
  color: var(--semi-color-text-1);
}

.markdown-body li {
  margin-bottom: 8px;
}

.markdown-body code {
  font-family: 'SF Mono', 'Consolas', 'Liberation Mono', Menlo, monospace;
  background: var(--semi-color-bg-2);
  padding: 2px 6px;
  border-radius: var(--semi-border-radius);
  font-size: 0.9em;
}

.markdown-body pre {
  background: var(--semi-color-bg-2);
  border: 1px solid var(--semi-color-border);
  border-radius: var(--semi-border-radius-lg);
  padding: var(--semi-spacing-loose);
  overflow-x: auto;
  margin: 16px 0;
}

.markdown-body pre code {
  background: none;
  padding: 0;
  font-size: 13px;
  line-height: 1.6;
}

.markdown-body blockquote {
  border-left: 4px solid var(--semi-color-primary);
  padding-left: var(--semi-spacing-loose);
  margin: 16px 0;
  color: var(--semi-color-text-2);
  font-style: italic;
}

.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
}

.markdown-body th,
.markdown-body td {
  padding: 12px;
  border: 1px solid var(--semi-color-border);
  text-align: left;
}

.markdown-body th {
  background: var(--semi-color-bg-1);
  font-weight: 600;
}

.markdown-body a {
  color: var(--semi-color-primary);
}

.markdown-body hr {
  border: none;
  border-top: 1px solid var(--semi-color-border);
  margin: 24px 0;
}

/* ==================== Loading State ==================== */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  color: var(--semi-color-text-2);
}

.loading-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--semi-color-border);
  border-top-color: var(--semi-color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ==================== Utility Classes ==================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }

.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.gap-3 { gap: 24px; }

/* ==================== Responsive ==================== */
@media (max-width: 768px) {
  :root {
    --semi-font-size-h1: 36px;
    --semi-font-size-h2: 30px;
    --semi-font-size-h3: 24px;
  }

  .nav-links {
    gap: var(--semi-spacing-tight);
  }

  .nav-link {
    padding: var(--semi-spacing-tightest) var(--semi-spacing-tight);
    font-size: 14px;
  }

  .container {
    padding: 0 var(--semi-spacing-loose);
  }
}

/* ==================== Animations ==================== */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fadeIn 0.4s ease forwards;
}

@keyframes shine {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.shine-text {
  background: linear-gradient(135deg, var(--semi-color-primary), var(--semi-color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shine 3s ease-in-out infinite;
}

/* ==================== Print ==================== */
@media print {
  .nav, .footer { display: none; }
  body { color: #000; background: #fff; }
}