/* ============================================================
   Global Expert Theme — AI Professional Style Override
   ============================================================ */

:root {
  --expert-primary: #0077B6;
  --expert-accent: #00B4D8;
  --expert-deep: #1B3A5C;
  --expert-surface: #f8fafc;
  --expert-surface-2: #f1f5f9;
  --expert-border: #e2e8f0;
  --expert-text: #1e293b;
  --expert-text-secondary: #64748b;
  --expert-card-bg: #ffffff;
  --expert-card-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --expert-card-shadow-hover: 0 10px 25px rgba(0,0,0,0.08), 0 4px 10px rgba(0,0,0,0.04);
  --expert-gradient: linear-gradient(135deg, #0077B6, #00B4D8);
  --expert-radius: 10px;
  --expert-radius-sm: 6px;
}

.dark-mode {
  --expert-primary: #38bdf8;
  --expert-accent: #67e8f9;
  --expert-deep: #0ea5e9;
  --expert-surface: #1e293b;
  --expert-surface-2: #334155;
  --expert-border: #475569;
  --expert-text: #e2e8f0;
  --expert-text-secondary: #94a3b8;
  --expert-card-bg: #1e293b;
  --expert-card-shadow: 0 1px 3px rgba(0,0,0,0.2), 0 1px 2px rgba(0,0,0,0.12);
  --expert-card-shadow-hover: 0 10px 25px rgba(0,0,0,0.3), 0 4px 10px rgba(0,0,0,0.15);
  --expert-gradient: linear-gradient(135deg, #0284c7, #22d3ee);
}

/* --- Code font --- */
code, pre, .code-block, .keep-markdown-body code {
  font-family: 'JetBrains Mono', Consolas, 'Courier New', monospace !important;
}

/* --- Links --- */
.keep-markdown-body a:not(.badge):not(.filter-btn):not(.project-card-links a) {
  color: var(--expert-primary);
  text-decoration: none;
  background-image: linear-gradient(var(--expert-accent), var(--expert-accent));
  background-size: 0% 2px;
  background-position: 0 100%;
  background-repeat: no-repeat;
  transition: background-size 0.3s ease, color 0.3s ease;
}
.keep-markdown-body a:not(.badge):not(.filter-btn):hover {
  background-size: 100% 2px;
  color: var(--expert-accent);
}

/* --- Blockquote --- */
.keep-markdown-body blockquote {
  border-left: 4px solid transparent;
  border-image: var(--expert-gradient) 1;
  background: var(--expert-surface);
  padding: 14px 20px;
  margin: 1.5em 0;
  border-radius: 0 var(--expert-radius-sm) var(--expert-radius-sm) 0;
  color: var(--expert-text-secondary);
  font-style: normal;
}

/* --- Horizontal rule --- */
.keep-markdown-body hr {
  border: none;
  height: 1px;
  background: var(--expert-border);
  margin: 2em 0;
}

/* --- Tables (global) --- */
.keep-markdown-body table {
  border-collapse: collapse;
  border-radius: var(--expert-radius-sm);
  overflow: hidden;
  width: 100%;
}
.keep-markdown-body table th {
  background: var(--expert-surface-2);
  font-weight: 600;
  text-align: left;
}
.keep-markdown-body table th,
.keep-markdown-body table td {
  padding: 10px 14px;
  border: 1px solid var(--expert-border);
}
.keep-markdown-body table tbody tr:hover {
  background: var(--expert-surface);
}

/* --- Details / Summary --- */
.keep-markdown-body details {
  border: 1px solid var(--expert-border);
  border-left: 3px solid var(--expert-primary);
  border-radius: var(--expert-radius-sm);
  margin: 1.5em 0;
  overflow: hidden;
  background: var(--expert-card-bg);
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}
.keep-markdown-body details:hover {
  box-shadow: 0 2px 8px rgba(0,119,182,0.08);
}
.keep-markdown-body details[open] {
  border-left-color: var(--expert-accent);
}
.keep-markdown-body details summary {
  cursor: pointer;
  padding: 14px 18px;
  font-weight: 600;
  font-size: 0.95em;
  color: var(--expert-text);
  background: var(--expert-surface);
  transition: background 0.2s, color 0.2s;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
}
.keep-markdown-body details summary::-webkit-details-marker {
  display: none;
}
.keep-markdown-body details summary::before {
  content: '▸';
  display: inline-block;
  font-size: 0.8em;
  color: var(--expert-primary);
  transition: transform 0.25s ease;
  flex-shrink: 0;
}
.keep-markdown-body details[open] summary::before {
  transform: rotate(90deg);
}
.keep-markdown-body details summary:hover {
  background: var(--expert-surface-2);
  color: var(--expert-primary);
}
.keep-markdown-body details[open] summary {
  border-bottom: 1px solid var(--expert-border);
}
.keep-markdown-body details > *:not(summary) {
  padding-left: 6px;
  padding-right: 6px;
}

/* --- First screen enhancement --- */
.first-screen-container .description .desc-item {
  text-shadow: 0 2px 12px rgba(0,0,0,0.4);
  letter-spacing: 0.03em;
}

/* --- Scroll progress bar --- */
.scroll-progress-bar {
  background: var(--expert-gradient) !important;
}

/* --- Header link hover --- */
.header-container .header-content .menu-bar .menu-list .menu-item a:hover {
  color: var(--expert-accent) !important;
}

/* --- Post card hover effect --- */
.home-content-container .home-article-list .article-item-container:hover {
  box-shadow: var(--expert-card-shadow-hover);
  transform: translateY(-2px);
  transition: all 0.3s ease;
}

/* --- Selection color --- */
::selection {
  background: var(--expert-accent);
  color: #fff;
}

/* --- Tag cloud enhancement --- */
.tagcloud a {
  border-radius: 20px !important;
  padding: 4px 14px !important;
  transition: all 0.25s ease !important;
}

/* --- Footer signature --- */
.footer .footer-signature {
  margin-top: 8px;
  font-size: 13px;
  color: var(--expert-text-secondary);
  font-style: italic;
  letter-spacing: 0.02em;
  opacity: 0.8;
}