/* ==========================================================================
   ZAHIDUL HOQUE — GITHUB NATIVE PROFILE & ACADEMIC PORTFOLIO
   Design System: GitHub Primer Native Dark Theme
   ========================================================================== */

:root {
  /* GitHub Dark Palette */
  --canvas-default: #0d1117;
  --canvas-subtle: #161b22;
  --canvas-inset: #010409;
  --canvas-overlay: #1f242c;

  --border-default: #30363d;
  --border-muted: #21262d;
  --border-subtle: rgba(240, 246, 252, 0.1);

  --fg-default: #e6edf3;
  --fg-muted: #848d97;
  --fg-subtle: #6e7681;
  --fg-on-emphasis: #ffffff;

  --accent-fg: #2f81f7;
  --accent-emphasis: #1f6feb;
  --accent-subtle: rgba(56, 139, 253, 0.15);

  --success-fg: #3fb950;
  --success-emphasis: #238636;
  --success-hover: #2ea043;
  --success-subtle: rgba(46, 160, 67, 0.15);

  --attention-fg: #d29922;
  --attention-emphasis: #9e6a03;
  --attention-subtle: rgba(187, 128, 9, 0.15);

  --danger-fg: #f85149;
  --danger-emphasis: #da3633;

  --done-fg: #a371f7;
  --done-emphasis: #8957e5;

  /* Language Badges */
  --color-python: #3572A5;
  --color-html: #e34c26;
  --color-js: #f1e05a;
  --color-cpp: #f34b7d;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --font-mono: 'JetBrains Mono', 'Fira Code', ui-monospace, SFMono-Regular, Consolas, monospace;

  /* Radii */
  --r-sm: 4px;
  --r-md: 6px;
  --r-lg: 12px;
  --r-pill: 9999px;

  /* Transitions */
  --t-fast: 0.15s ease-in-out;
}

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

html {
  font-size: 14px;
  line-height: 1.5;
  scroll-behavior: smooth;
  scroll-padding-top: 120px;
  color-scheme: dark;
}

body {
  font-family: var(--font-sans);
  background-color: var(--canvas-default);
  color: var(--fg-default);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--accent-fg);
  text-decoration: none;
  transition: color var(--t-fast);
}

a:hover {
  text-decoration: underline;
}

/* ==========================================================================
   Header: GitHub Global Navigation & Tabs
   ========================================================================== */
.gh-header {
  background-color: var(--canvas-inset);
  border-bottom: 1px solid var(--border-muted);
  position: sticky;
  top: 0;
  z-index: 100;
}

.gh-header-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.gh-header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.gh-logo-link {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.gh-header-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  image-rendering: pixelated;
  border: 1.5px solid var(--border-default);
  display: block;
  transition: transform var(--t-fast), border-color var(--t-fast), box-shadow var(--t-fast);
}

.gh-logo-link:hover .gh-header-avatar {
  border-color: var(--accent-fg);
  transform: scale(1.08);
  box-shadow: 0 0 0 2px rgba(56, 139, 253, 0.3);
}

.gh-header-breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
}

.gh-user-link {
  font-weight: 600;
  color: var(--accent-fg);
}

.gh-separator {
  color: var(--fg-muted);
}

.gh-current-label {
  color: var(--fg-muted);
  font-weight: 400;
}

.gh-header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* GitHub Search Box Simulation */
.gh-search-box {
  display: flex;
  align-items: center;
  background-color: var(--canvas-default);
  border: 1px solid var(--border-default);
  border-radius: var(--r-md);
  padding: 4px 10px;
  gap: 8px;
  color: var(--fg-muted);
  width: 270px;
  transition: border-color var(--t-fast), width var(--t-fast);
}

.gh-search-box:focus-within {
  border-color: var(--accent-fg);
  box-shadow: 0 0 0 1px var(--accent-fg);
  width: 310px;
}

.gh-search-box input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--fg-default);
  font-family: inherit;
  font-size: 13px;
  width: 100%;
}

.gh-search-box input::placeholder {
  color: var(--fg-subtle);
}

.gh-shortcut-key {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-muted);
  background-color: var(--canvas-subtle);
  border: 1px solid var(--border-default);
  border-radius: 3px;
  padding: 1px 5px;
  line-height: 1;
}

/* Avatar Mini in Header */
.gh-avatar-mini {
  display: inline-flex;
  align-items: center;
  border-radius: 50%;
  overflow: hidden;
  border: 1px solid var(--border-default);
}

.gh-avatar-mini-img {
  width: 28px;
  height: 28px;
  object-fit: cover;
  image-rendering: pixelated;
}

/* ==========================================================================
   GitHub Underline Profile Tabs Navigation
   ========================================================================== */
.gh-profile-tabs {
  background-color: var(--canvas-inset);
  border-top: 1px solid var(--border-muted);
}

.gh-tabs-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

.gh-tabs-container::-webkit-scrollbar {
  display: none;
}

.gh-tab {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 14px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  color: var(--fg-muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--t-fast);
}

.gh-tab:hover {
  color: var(--fg-default);
}

.gh-tab.active {
  color: var(--fg-default);
  font-weight: 600;
  border-bottom-color: #f78166;
}

.gh-counter {
  font-size: 12px;
  font-weight: 500;
  background-color: var(--canvas-subtle);
  color: var(--fg-muted);
  border: 1px solid var(--border-default);
  border-radius: var(--r-pill);
  padding: 0 6px;
  line-height: 18px;
}

.gh-tab.active .gh-counter {
  color: var(--fg-default);
  border-color: var(--fg-muted);
}

.gh-badge-highlight {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  background-color: rgba(56, 139, 253, 0.2);
  color: var(--accent-fg);
  border: 1px solid rgba(56, 139, 253, 0.4);
  border-radius: var(--r-pill);
  padding: 1px 6px;
}

/* ==========================================================================
   Page Layout: 2 Columns (Sidebar + Main)
   ========================================================================== */
.gh-page-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 32px 24px;
  display: grid;
  grid-template-columns: 296px 1fr;
  gap: 32px;
  width: 100%;
  flex: 1;
}

/* ==========================================================================
   SIDEBAR: Authentic GitHub User Profile
   ========================================================================== */
.gh-sidebar {
  position: relative;
}

.gh-sidebar-inner {
  position: sticky;
  top: 110px;
  display: flex;
  flex-direction: column;
}

.gh-avatar-wrapper {
  position: relative;
  margin-bottom: 16px;
  width: 100%;
  max-width: 296px;
}

.gh-profile-avatar {
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--border-default);
  background-color: var(--canvas-subtle);
  image-rendering: pixelated;
  display: block;
}

/* GitHub Status Emoji / Pill - Prominently Highlighted */
.gh-status-badge {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, rgba(35, 134, 54, 0.35) 0%, rgba(13, 27, 20, 0.96) 100%);
  border: 1.5px solid #3fb950;
  border-radius: var(--r-pill);
  padding: 5px 13px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 11.5px;
  font-weight: 600;
  color: #ffffff;
  box-shadow: 0 0 16px rgba(63, 185, 80, 0.38), 0 4px 14px rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  width: max-content;
  max-width: min(320px, calc(100vw - 32px));
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  z-index: 2;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  animation: status-badge-glow 3.5s infinite ease-in-out;
  cursor: default;
}

.gh-status-badge:hover {
  transform: translateX(-50%) translateY(-2px);
  box-shadow: 0 0 24px rgba(63, 185, 80, 0.6), 0 6px 18px rgba(0, 0, 0, 0.7);
  border-color: #56d364;
}

/* Pulsing radar beacon */
.gh-status-beacon {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 8px;
  height: 8px;
  flex-shrink: 0;
}

.gh-beacon-ping {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background-color: #3fb950;
  animation: beacon-ping 1.8s cubic-bezier(0, 0, 0.2, 1) infinite;
}

.gh-beacon-dot {
  position: relative;
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #3fb950;
  box-shadow: 0 0 6px #3fb950;
}

@keyframes beacon-ping {
  0% {
    transform: scale(0.95);
    opacity: 0.9;
  }
  70%, 100% {
    transform: scale(2.6);
    opacity: 0;
  }
}

@keyframes status-badge-glow {
  0%, 100% {
    border-color: #3fb950;
    box-shadow: 0 0 14px rgba(63, 185, 80, 0.35), 0 4px 12px rgba(0, 0, 0, 0.6);
  }
  50% {
    border-color: #56d364;
    box-shadow: 0 0 22px rgba(63, 185, 80, 0.55), 0 4px 16px rgba(0, 0, 0, 0.7);
  }
}

.gh-status-emoji {
  font-size: 13px;
  line-height: 1;
}

.gh-status-text {
  overflow: hidden;
  text-overflow: ellipsis;
  letter-spacing: 0.15px;
  color: #ffffff;
}

/* User Names */
.gh-user-names {
  margin-bottom: 12px;
}

.gh-full-name {
  font-size: 24px;
  line-height: 1.25;
  font-weight: 600;
  color: var(--fg-default);
}

.gh-username-row {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.gh-username {
  font-size: 18px;
  font-weight: 300;
  color: var(--fg-muted);
}

.gh-pronouns {
  font-size: 12px;
  color: var(--fg-subtle);
}

.gh-user-bio {
  font-size: 13px;
  color: var(--fg-default);
  line-height: 1.5;
  margin-bottom: 16px;
}

/* Sidebar Buttons */
.gh-profile-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

/* GitHub Buttons */
.gh-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 6px 14px;
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  line-height: 20px;
  color: var(--fg-default);
  background-color: var(--canvas-subtle);
  border: 1px solid var(--border-default);
  border-radius: var(--r-md);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--t-fast);
  white-space: nowrap;
}

.gh-btn:hover {
  background-color: var(--border-default);
  border-color: var(--fg-muted);
  text-decoration: none;
}

.gh-btn-sm {
  padding: 3px 10px;
  font-size: 12px;
  line-height: 18px;
}

.gh-btn-block {
  width: 100%;
}

.gh-btn-primary {
  color: #ffffff;
  background-color: var(--success-emphasis);
  border-color: rgba(240, 246, 252, 0.1);
}

.gh-btn-primary:hover {
  background-color: var(--success-hover);
  border-color: rgba(240, 246, 252, 0.2);
}

.gh-btn-linkedin {
  color: #ffffff;
  background-color: #0a66c2;
  border-color: rgba(240, 246, 252, 0.1);
}

.gh-btn-linkedin:hover {
  background-color: #004182;
  border-color: rgba(240, 246, 252, 0.2);
  color: #ffffff;
}

.gh-btn-icon {
  background: transparent;
  border: 1px solid var(--border-default);
  border-radius: var(--r-md);
  color: var(--fg-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 2px 7px;
  cursor: pointer;
  transition: all var(--t-fast);
}

.gh-btn-icon:hover {
  color: var(--fg-default);
  border-color: var(--accent-fg);
  background-color: var(--accent-subtle);
}

/* Verified Metadata List */
.gh-meta-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 13px;
  color: var(--fg-default);
  margin-bottom: 20px;
}

.gh-meta-item {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow: hidden;
  text-overflow: ellipsis;
}

.gh-meta-item svg {
  flex-shrink: 0;
  color: var(--fg-muted);
}

.gh-link {
  color: var(--fg-default);
}

.gh-link:hover {
  color: var(--accent-fg);
  text-decoration: underline;
}

.gh-sidebar-divider {
  height: 1px;
  background-color: var(--border-muted);
  margin: 16px 0;
}

.gh-section-title-sm {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 10px;
  letter-spacing: 0.5px;
}

/* Badges Flow */
.gh-badges-flow {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.gh-badge {
  font-size: 11px;
  background-color: var(--canvas-subtle);
  border: 1px solid var(--border-default);
  border-radius: var(--r-pill);
  padding: 3px 8px;
  color: var(--fg-default);
}

/* Supervisor Reference Mini Box */
.gh-reference-mini {
  font-size: 12px;
  line-height: 1.4;
  background-color: var(--canvas-subtle);
  border: 1px solid var(--border-default);
  border-radius: var(--r-md);
  padding: 10px 12px;
}

.ref-name {
  font-weight: 600;
  color: var(--fg-default);
  margin-bottom: 2px;
}

.ref-title, .ref-dept, .ref-inst {
  color: var(--fg-muted);
}

.ref-link {
  display: inline-block;
  margin-top: 6px;
  color: var(--accent-fg);
  font-weight: 500;
}

/* ==========================================
   MAIN CONTENT AREA & TAB PANES
   ========================================== */
.gh-main-content {
  min-width: 0; /* Prevents overflow issues */
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
}

/* ==========================================
   GENERIC GITHUB BOX (gh-box)
   ========================================== */
.gh-box {
  background-color: var(--canvas-default);
  border: 1px solid var(--border-default);
  border-radius: var(--r-md);
  margin-bottom: 24px;
}

.gh-box-header {
  padding: 12px 16px;
  background-color: var(--canvas-subtle);
  border-bottom: 1px solid var(--border-default);
  border-top-left-radius: var(--r-md);
  border-top-right-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.gh-box-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--fg-default);
}

.gh-box-body {
  padding: 24px;
}

.gh-tag-pill {
  font-size: 11px;
  font-weight: 500;
  background-color: var(--canvas-subtle);
  border: 1px solid var(--border-default);
  border-radius: var(--r-pill);
  padding: 2px 8px;
  color: var(--fg-muted);
}

.gh-tag-pill.gh-tag-highlighted {
  background: linear-gradient(135deg, rgba(35, 134, 54, 0.28) 0%, rgba(13, 27, 20, 0.95) 100%);
  border: 1px solid rgba(63, 185, 80, 0.7);
  color: #3fb950;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  box-shadow: 0 0 10px rgba(63, 185, 80, 0.2);
}

.gh-beacon-dot-sm {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #3fb950;
  box-shadow: 0 0 6px #3fb950;
  display: inline-block;
  flex-shrink: 0;
}

/* ==========================================
   MARKDOWN BODY (Profile README.md Styling)
   ========================================== */
.markdown-body {
  font-size: 14px;
  line-height: 1.6;
  color: var(--fg-default);
}

.markdown-body h2 {
  font-size: 20px;
  font-weight: 600;
  border-bottom: 1px solid var(--border-muted);
  padding-bottom: 8px;
  margin-bottom: 14px;
}

.markdown-body h3 {
  font-size: 16px;
  font-weight: 600;
  margin-top: 24px;
  margin-bottom: 10px;
}

.markdown-body h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
}

.markdown-body ul {
  padding-left: 20px;
  margin-bottom: 16px;
}

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

.lead-bio {
  font-size: 14px;
  color: var(--fg-default);
  margin-bottom: 16px;
}

/* GitHub Callout */
.gh-callout {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background-color: rgba(56, 139, 253, 0.08);
  border-left: 4px solid var(--accent-fg);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  padding: 12px 16px;
  margin: 16px 0;
  font-size: 13px;
  line-height: 1.5;
}

.callout-icon {
  font-size: 16px;
  flex-shrink: 0;
}

/* Research Domain Pills Grid */
.research-pills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 10px;
  margin: 14px 0 20px 0;
}

.res-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  background-color: var(--canvas-subtle);
  border: 1px solid var(--border-default);
  border-radius: var(--r-md);
  padding: 8px 12px;
  font-size: 12px;
}

.pill-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}
.blue-dot { background-color: var(--accent-fg); }
.green-dot { background-color: var(--success-fg); }
.purple-dot { background-color: var(--done-fg); }
.yellow-dot { background-color: var(--attention-fg); }
.cyan-dot { background-color: #00d2ff; }
.orange-dot { background-color: #ff7a00; }
.red-dot { background-color: var(--danger-fg); }
.teal-dot { background-color: #10b981; }

/* ==========================================
   PINNED REPOSITORIES GRID
   ========================================== */
.gh-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 24px 0 12px 0;
}

.gh-section-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--fg-default);
}

.gh-pinned-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.gh-pinned-card {
  background-color: var(--canvas-default);
  border: 1px solid var(--border-default);
  border-radius: var(--r-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: border-color var(--t-fast);
}

.gh-pinned-card:hover {
  border-color: var(--fg-muted);
}

.pinned-card-header {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 8px;
}

.pinned-card-header svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--fg-muted);
}

.pinned-repo-name {
  font-weight: 600;
  color: var(--accent-fg);
  word-break: break-word;
  line-height: 1.3;
}

.gh-visibility-pill {
  font-size: 10px;
  font-weight: 500;
  color: var(--fg-muted);
  border: 1px solid var(--border-default);
  border-radius: var(--r-pill);
  padding: 0 6px;
  line-height: 16px;
  margin-left: auto;
  flex-shrink: 0;
}

.pinned-card-desc {
  font-size: 12px;
  color: var(--fg-muted);
  line-height: 1.45;
  margin-bottom: 16px;
  flex: 1;
}

.pinned-card-footer {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 12px;
  color: var(--fg-muted);
}

.repo-lang {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.lang-color {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}
.python-color { background-color: var(--color-python); }
.html-color { background-color: var(--color-html); }
.js-color { background-color: var(--color-js); }

.repo-meta-stat {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--fg-muted);
}

.repo-meta-stat:hover {
  color: var(--accent-fg);
  text-decoration: none;
}

.pinned-card-footer .copy-btn {
  margin-left: auto;
}



/* ==========================================
   RESEARCH & MASTER'S THESIS SHOWCASE
   ========================================== */
.thesis-institution-line {
  color: var(--fg-muted);
  font-size: 13px;
  margin-top: -8px;
  margin-bottom: 20px;
}

.paper-summary-card {
  background-color: var(--canvas-subtle);
  border: 1px solid var(--border-default);
  border-radius: var(--r-md);
  padding: 16px;
  margin-bottom: 24px;
}

.paper-spec-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 16px;
}

.paper-spec {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.spec-label {
  font-size: 11px;
  text-transform: uppercase;
  color: var(--fg-muted);
  font-weight: 500;
}

.spec-value {
  font-size: 14px;
  font-weight: 600;
  color: var(--fg-default);
}

.text-green {
  color: var(--success-fg);
}

.contributions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.contrib-card {
  background-color: var(--canvas-subtle);
  border: 1px solid var(--border-default);
  border-radius: var(--r-md);
  padding: 16px;
  font-size: 13px;
  line-height: 1.5;
}

.contrib-card h4 {
  color: var(--accent-fg);
  font-size: 14px;
  margin-bottom: 8px;
}

.math-block {
  background-color: var(--canvas-inset);
  border: 1px solid var(--border-muted);
  border-radius: var(--r-sm);
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-default);
  margin: 10px 0;
  text-align: center;
}

.math-caption {
  font-size: 12px;
  color: var(--fg-muted);
}

/* Tables */
.table-responsive {
  overflow-x: auto;
  margin: 16px 0 28px 0;
}

.gh-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  text-align: left;
}

.gh-table th, .gh-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border-default);
}

.gh-table th {
  background-color: var(--canvas-subtle);
  color: var(--fg-default);
  font-weight: 600;
}

.gh-table tr:hover td {
  background-color: rgba(255, 255, 255, 0.02);
}

.tag-metric {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--success-fg);
  background-color: var(--success-subtle);
  border: 1px solid rgba(46, 160, 67, 0.3);
  padding: 2px 6px;
  border-radius: var(--r-sm);
}

/* Defect Chips Row */
.section-desc-sm {
  font-size: 13px;
  color: var(--fg-muted);
  margin-bottom: 12px;
}

.gh-defect-chips-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.defect-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: var(--canvas-subtle);
  border: 1px solid var(--border-default);
  border-radius: var(--r-pill);
  padding: 5px 12px;
  font-family: inherit;
  font-size: 12px;
  color: var(--fg-default);
  cursor: pointer;
  transition: all var(--t-fast);
}

.defect-btn:hover {
  border-color: var(--fg-muted);
}

.defect-btn.active {
  background-color: rgba(255, 255, 255, 0.08);
  border-color: var(--d-color);
  box-shadow: 0 0 0 1px var(--d-color);
}

.d-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.d-code {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--fg-muted);
}

/* Simulator Dashboard */
.sim-dashboard {
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: 16px;
  background-color: var(--canvas-subtle);
  border: 1px solid var(--border-default);
  border-radius: var(--r-md);
  padding: 16px;
}

.sim-viewport {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.car-frame-canvas {
  background-color: var(--canvas-inset);
  border: 1px solid var(--border-muted);
  border-radius: var(--r-sm);
  position: relative;
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.car-svg {
  width: 90%;
  max-width: 440px;
  height: auto;
}

.sim-bbox {
  position: absolute;
  border: 2px dashed #ff7a00;
  width: 75px;
  height: 48px;
  pointer-events: none;
  transition: all 0.25s ease;
}

.bbox-label {
  position: absolute;
  top: -20px;
  left: -2px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  color: #ffffff;
  padding: 2px 6px;
  border-radius: 2px;
  white-space: nowrap;
}

.bbox-mask {
  width: 100%;
  height: 100%;
}

.sim-controls-strip {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  font-size: 12px;
  color: var(--fg-muted);
}

.sim-slider-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.sim-slider-group input[type="range"] {
  accent-color: var(--accent-fg);
  cursor: pointer;
}

/* Live Telemetry Sidebar */
.sim-telemetry {
  display: flex;
  flex-direction: column;
  gap: 14px;
  background-color: var(--canvas-default);
  border: 1px solid var(--border-default);
  border-radius: var(--r-sm);
  padding: 14px;
}

.telemetry-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.telemetry-label {
  font-size: 10px;
  text-transform: uppercase;
  color: var(--fg-subtle);
  font-weight: 600;
}

.telemetry-value {
  font-size: 14px;
  font-weight: 600;
  color: var(--fg-default);
}

.telemetry-sub {
  font-size: 11px;
  color: var(--fg-muted);
  font-family: var(--font-mono);
}

.telemetry-bar {
  width: 100%;
  height: 6px;
  background-color: var(--border-muted);
  border-radius: var(--r-pill);
  overflow: hidden;
  margin-top: 4px;
}

.telemetry-fill {
  height: 100%;
  border-radius: var(--r-pill);
  transition: width 0.3s ease, background-color 0.3s ease;
}

.tag-moderate {
  background-color: rgba(255, 122, 0, 0.15);
  border-color: rgba(255, 122, 0, 0.4);
  color: #ff7a00;
}

/* ==========================================
   REPOSITORIES LIST (Tab 3)
   ========================================= */
.gh-repos-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-default);
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.repos-search-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  background-color: var(--canvas-default);
  border: 1px solid var(--border-default);
  border-radius: var(--r-md);
  padding: 6px 10px;
  color: var(--fg-muted);
  width: 320px;
}

.repos-search-wrap:focus-within {
  border-color: var(--accent-fg);
  box-shadow: 0 0 0 1px var(--accent-fg);
}

.repos-search-wrap input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--fg-default);
  font-family: inherit;
  font-size: 13px;
  width: 100%;
}

.repos-filter-buttons {
  display: flex;
  gap: 6px;
}

.repos-filter-buttons .gh-btn.active {
  background-color: var(--border-default);
  border-color: var(--fg-muted);
  color: var(--fg-default);
}

.gh-repos-list {
  display: flex;
  flex-direction: column;
}

.repo-card {
  padding: 20px 0;
  border-bottom: 1px solid var(--border-muted);
  display: flex;
  justify-content: space-between;
  gap: 24px;
}

.repo-main-col {
  flex: 1;
}

.repo-header-line {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 6px;
}

.repo-title-link {
  font-size: 16px;
  font-weight: 600;
  color: var(--accent-fg);
}

.repo-description-text {
  font-size: 13px;
  color: var(--fg-muted);
  line-height: 1.45;
  margin-bottom: 12px;
  max-width: 680px;
}

.repo-tags-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}

.repo-tag {
  font-size: 11px;
  background-color: rgba(56, 139, 253, 0.1);
  color: var(--accent-fg);
  border-radius: var(--r-pill);
  padding: 1px 8px;
}

.repo-meta-row {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 12px;
  color: var(--fg-muted);
}

.repo-actions-col {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
}

/* ==========================================
   EDUCATION & WORK TIMELINE (Tab 4)
   ========================================== */
.edu-card {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border-muted);
}

.edu-card:last-child {
  border-bottom: none;
}

.edu-badge-col {
  font-size: 24px;
  flex-shrink: 0;
  line-height: 1;
}

.edu-main-col {
  flex: 1;
}

.edu-date {
  font-size: 12px;
  color: var(--fg-muted);
  margin-bottom: 2px;
}

.edu-degree {
  font-size: 16px;
  font-weight: 600;
  color: var(--fg-default);
  margin-bottom: 4px;
}

.edu-school {
  font-size: 13px;
  color: var(--fg-muted);
  margin-bottom: 8px;
}

.edu-desc {
  font-size: 13px;
  color: var(--fg-default);
  line-height: 1.5;
  margin-bottom: 10px;
}

.edu-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.exp-bullet-list {
  padding-left: 18px;
  margin: 6px 0 10px 0;
  font-size: 13px;
}

.exp-bullet-list li {
  margin-bottom: 4px;
}

.certs-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.cert-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 13px;
}

.cert-check {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background-color: var(--success-subtle);
  color: var(--success-fg);
  border: 1px solid rgba(46, 160, 67, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  flex-shrink: 0;
  margin-top: 2px;
}

.cert-desc {
  color: var(--fg-muted);
  font-size: 12px;
  margin-top: 2px;
}

/* ==========================================
   SKILLS & LAB ALIGNMENT (Tab 5)
   ========================================== */
.alignment-block {
  margin-bottom: 18px;
}

.alignment-block h4 {
  color: var(--fg-default);
  font-size: 14px;
  margin-bottom: 4px;
}

.alignment-block p {
  color: var(--fg-muted);
  font-size: 13px;
  line-height: 1.5;
}

.skill-category-row {
  margin-bottom: 18px;
}

.skill-cat-title {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 8px;
}

.skill-pills-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.gh-pill {
  font-size: 12px;
  background-color: var(--canvas-subtle);
  border: 1px solid var(--border-default);
  border-radius: var(--r-md);
  padding: 4px 10px;
  color: var(--fg-default);
}

.gh-pill.accent-pill {
  border-color: rgba(56, 139, 253, 0.4);
  background-color: rgba(56, 139, 253, 0.08);
  color: var(--accent-fg);
}

/* ==========================================
   TERMINAL (Tab 6)
   ========================================== */
.terminal-chips-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.gh-chip {
  font-family: var(--font-mono);
  font-size: 11px;
  background-color: var(--canvas-default);
  border: 1px solid var(--border-default);
  border-radius: var(--r-sm);
  color: var(--fg-muted);
  padding: 3px 8px;
  cursor: pointer;
  transition: all var(--t-fast);
}

.gh-chip:hover {
  color: var(--fg-default);
  border-color: var(--accent-fg);
  background-color: var(--accent-subtle);
}

.terminal-container {
  background-color: var(--canvas-inset);
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  min-height: 340px;
  max-height: 520px;
  overflow-y: auto;
  border-bottom-left-radius: var(--r-md);
  border-bottom-right-radius: var(--r-md);
}

.term-line {
  margin-bottom: 4px;
  white-space: pre-wrap;
  word-break: break-word;
}

.term-accent { color: var(--accent-fg); font-weight: 600; }
.term-muted { color: var(--fg-muted); }
.term-green { color: var(--success-fg); }
.term-blue { color: var(--accent-fg); }
.term-purple { color: var(--done-fg); }
.term-gold { color: var(--attention-fg); }
.term-cmd { color: #ffffff; font-weight: 600; }

.term-form {
  display: flex;
  align-items: center;
  margin-top: 8px;
}

.term-label {
  color: var(--fg-muted);
  white-space: nowrap;
}

.term-user { color: var(--success-fg); }
.term-at { color: var(--fg-subtle); }
.term-host { color: var(--accent-fg); }
.term-path { color: var(--attention-fg); }

.term-input {
  background: transparent;
  border: none;
  outline: none;
  font-family: var(--font-mono);
  font-size: 12px;
  color: #ffffff;
  width: 100%;
}

/* ==========================================
   CONTACT (Tab 7)
   ========================================== */
.gh-contact-layout {
  max-width: 840px;
}

.contact-card-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-muted);
  font-size: 13px;
  position: relative;
}

.contact-card-item:last-child {
  border-bottom: none;
}

.contact-label {
  font-size: 11px;
  text-transform: uppercase;
  color: var(--fg-subtle);
  font-weight: 600;
}

.contact-val {
  color: var(--fg-default);
  font-weight: 500;
}

.contact-card-item .copy-btn {
  position: absolute;
  right: 0;
  top: 16px;
}

.gh-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.gh-form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.gh-form-group label {
  font-size: 12px;
  font-weight: 600;
  color: var(--fg-default);
}

.required {
  color: var(--danger-fg);
}

.gh-input {
  background-color: var(--canvas-default);
  border: 1px solid var(--border-default);
  border-radius: var(--r-md);
  padding: 6px 12px;
  font-family: inherit;
  font-size: 13px;
  color: var(--fg-default);
  outline: none;
  transition: border-color var(--t-fast);
}

.gh-input:focus {
  border-color: var(--accent-fg);
  box-shadow: 0 0 0 1px var(--accent-fg);
}

.gh-form-actions {
  display: flex;
  gap: 10px;
  margin-top: 8px;
}

/* ==========================================
   FOOTER: GitHub Profile Minimal
   ========================================== */
.gh-footer {
  border-top: 1px solid var(--border-muted);
  background-color: var(--canvas-inset);
  padding: 32px 24px;
  margin-top: auto;
  font-size: 12px;
  color: var(--fg-muted);
}

.gh-footer-container {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.gh-footer-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.gh-footer-links {
  list-style: none;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.gh-footer-links a {
  color: var(--fg-muted);
}

.gh-footer-links a:hover {
  color: var(--accent-fg);
}

/* ==========================================
   TOAST NOTIFICATION
   ========================================== */
.gh-toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.gh-toast {
  background-color: var(--canvas-overlay);
  border: 1px solid var(--border-default);
  border-radius: var(--r-md);
  padding: 10px 14px;
  font-size: 13px;
  color: var(--fg-default);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  gap: 8px;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.2s ease, transform 0.2s ease;
  pointer-events: auto;
}

.gh-toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================
   RESPONSIVE MEDIA QUERIES
   ========================================== */
@media (max-width: 1024px) {
  .gh-page-container {
    grid-template-columns: 260px 1fr;
    gap: 24px;
    padding: 24px 16px;
  }
  .gh-contact-layout {
    grid-template-columns: 1fr;
  }
  .sim-dashboard {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 820px) {
  .gh-page-container {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .gh-sidebar-inner {
    position: static;
  }
  .gh-avatar-wrapper {
    max-width: 160px;
    margin: 0 auto 16px auto;
  }
  .gh-user-names {
    text-align: center;
  }
  .gh-user-bio {
    text-align: center;
  }
  .gh-header-container {
    padding: 10px 16px;
  }
  .gh-search-box {
    display: none;
  }
}