/* ExoHub brand overrides
   Source: openspec/changes/add-site-branding/exohub branding.png
   Purpose: Map theme primary (indigo) scale to ExoHub Orange→Purple gradient and expose gradient vars. */

/* Light mode tokens */
:root {
  /* Primary replaces theme indigo scale using orange→purple ramp */
  --color-indigo-50:  #fff4e8;
  --color-indigo-100: #ffe1c4;  /* light orange */
  --color-indigo-200: #ffc184;  /* soft orange */
  --color-indigo-300: #ff9a4d;  /* orange */
  --color-indigo-400: #ff7a18;  /* brand orange */
  --color-indigo-500: #ff4f7a;  /* orange→pink midpoint */
  --color-indigo-600: #e23fb1;  /* magenta */
  --color-indigo-700: #b433d9;  /* purple-magenta */
  --color-indigo-800: #8a2be2;  /* vivid purple */
  --color-indigo-900: #6b1fbf;  /* deep purple */
  --color-indigo-950: #4a1691;  /* darkest purple */

  /* Gradient stops for brand components */
  /* Darker brand gradient per spec */
  --brand-grad-start: #e96e1f;  /* dark orange */
  --brand-grad-mid:   #b04b74;  /* mid blend */
  --brand-grad-end:   #6a3697;  /* dark purple */

  /* Map Tailbliss primary tokens so bg-primary-* picks up brand palette. */
  --color-primary-400: var(--brand-grad-start);
  --color-primary-500: #cc5a2d; /* slightly darker than start */
  --color-primary-600: oklch(0.42 0.12 350.27); /* requested key brand shade */
  --color-primary-700: #8c3e9d; /* near brand end */

  /* Surfaces */
  --brand-bg:       #0f1014;
  --brand-surface:  #15161c;
  --brand-text:     #e7e8ee;
}

/* Dark mode tokens */
.dark {
  /* Lifted, more luminous tones for dark UI */
  --color-indigo-50:  #2a1300;
  --color-indigo-100: #3b1700;  /* warm shadow */
  --color-indigo-200: #5a2300;
  --color-indigo-300: #7a2c00;
  --color-indigo-400: #ff8e3d;  /* orange highlight */
  --color-indigo-500: #ff6aa0;  /* pink midpoint */
  --color-indigo-600: #f04bd2;  /* magenta */
  --color-indigo-700: #c061f3;  /* purple-magenta */
  --color-indigo-800: #a17bff;  /* vivid purple */
  --color-indigo-900: #cbb3ff;  /* light purple */
  --color-indigo-950: #efe7ff;  /* near-white purple */

  --brand-grad-start: #e96e1f;
  --brand-grad-mid:   #b04b74;
  --brand-grad-end:   #6a3697;

  /* Dark theme primary mappings (kept similar for consistency) */
  --color-primary-400: var(--brand-grad-start);
  --color-primary-500: #cc5a2d;
  --color-primary-600: oklch(0.42 0.12 350.27);
  --color-primary-700: #8c3e9d;

  --brand-bg:       #0c0d11;
  --brand-surface:  #14151b;
  --brand-text:     #e6e7ed;
}

/* Optional helpers (can be used in content/templates) */
.bg-brand { background-color: var(--brand-bg); }
.surface-brand { background-color: var(--brand-surface); }
.text-brand { color: var(--brand-text); }
.text-accent { color: var(--brand-accent-500); }
.bg-accent { background-color: var(--brand-accent-500); }

/* Helper utility: gradient background using brand palette */
.bg-brand-gradient {
  background: linear-gradient(90deg, var(--brand-grad-start), var(--brand-grad-mid), var(--brand-grad-end));
}

/* Content width + image sizing tweaks */
/* Widen prose by ~20% vs default 65ch */
.prose { max-width: 78ch; }

/* If author sets an explicit inline width on images, honor it fully */
.prose img[style*="width"] { max-width: none; height: auto; }

/* Ensure hero titles never get visually truncated */
.bg-primary-600 h1 {
  overflow-wrap: anywhere;
  word-break: break-word;
  hyphens: auto;
}

/* Table of Contents Styles */
.toc {
  font-size: 0.9rem;
  line-height: 1.5;
}

.toc ul {
  list-style: none;
  padding-left: 0;
  margin: 0;
}

.toc > ul > li {
  margin-bottom: 0.5rem;
}

/* Level 1 (h2) - Main sections */
.toc > ul > li > a {
  color: #374151;
  font-weight: 600;
  font-size: 1rem;
  padding: 0.5rem 0;
  border-left: 3px solid transparent;
  padding-left: 1rem;
  margin-left: 0;
}

/* Level 2 (h3) - Subsections */
.toc ul ul {
  padding-left: 1.5rem;
  margin-top: 0.25rem;
  border-left: 1px solid #e5e7eb;
}

.toc ul ul li {
  margin-bottom: 0.25rem;
}

.toc ul ul > li > a {
  color: #6b7280;
  font-weight: 500;
  font-size: 0.9rem;
  padding: 0.3rem 0;
  padding-left: 0.75rem;
  position: relative;
}

.toc ul ul > li > a::before {
  content: "→";
  position: absolute;
  left: -0.5rem;
  color: #9ca3af;
  font-size: 0.8rem;
}

/* Level 3 (h4) - Sub-subsections */
.toc ul ul ul {
  padding-left: 1.25rem;
  border-left: 1px dotted #d1d5db;
}

.toc ul ul ul > li > a {
  color: #9ca3af;
  font-weight: 400;
  font-size: 0.85rem;
  padding: 0.2rem 0;
  padding-left: 0.5rem;
  font-style: italic;
}

.toc ul ul ul > li > a::before {
  content: "•";
  position: absolute;
  left: -0.3rem;
  color: #d1d5db;
  font-size: 0.7rem;
}

/* Generic fallback for any ToC links */
.toc a {
  text-decoration: none;
  display: block;
  transition: all 0.2s ease;
  text-indent: 0;
}

/* Hover states for different levels */
.toc > ul > li > a:hover {
  color: var(--color-primary-600);
  border-left-color: var(--color-primary-600);
  background-color: rgba(233, 110, 31, 0.05);
}

.toc ul ul > li > a:hover {
  color: var(--color-primary-600);
  background-color: rgba(233, 110, 31, 0.05);
  padding-left: 1rem;
}

.toc ul ul ul > li > a:hover {
  color: var(--color-primary-500);
  background-color: rgba(233, 110, 31, 0.03);
  font-style: normal;
}

/* Dark mode ToC styles - Nuclear approach to override any conflicts */
.dark .toc a,
.dark .toc-container a,
.dark nav.toc a,
.dark aside a,
.dark [class*="toc"] a {
  color: #d1d5db !important;
}

/* Level 1 - Main sections (direct children of first ul) */
.dark .toc > ul > li > a,
.dark .toc-container .toc > ul > li > a,
.dark nav.toc > ul > li > a {
  color: #f3f4f6 !important;
  border-left-color: transparent;
}

/* Level 2 - Subsections */
.dark .toc ul ul > li > a,
.dark .toc-container .toc ul ul > li > a,
.dark nav.toc ul ul > li > a {
  color: #d1d5db !important;
}

/* Level 3 - Sub-subsections */
.dark .toc ul ul ul > li > a,
.dark .toc-container .toc ul ul ul > li > a,
.dark nav.toc ul ul ul > li > a {
  color: #9ca3af !important;
}

.dark .toc ul ul {
  border-left-color: #374151;
}

.dark .toc ul ul ul {
  border-left-color: #4b5563;
}

.dark .toc ul ul > li > a::before {
  color: #6b7280;
}

.dark .toc ul ul ul > li > a::before {
  color: #6b7280;
}

.dark .toc > ul > li > a:hover,
.dark .toc-container .toc > ul > li > a:hover,
.dark nav.toc > ul > li > a:hover {
  color: var(--color-primary-400) !important;
  border-left-color: var(--color-primary-400);
  background-color: rgba(233, 110, 31, 0.1);
}

.dark .toc ul ul > li > a:hover,
.dark .toc-container .toc ul ul > li > a:hover,
.dark nav.toc ul ul > li > a:hover {
  color: var(--color-primary-400) !important;
  background-color: rgba(233, 110, 31, 0.1);
}

.dark .toc ul ul ul > li > a:hover,
.dark .toc-container .toc ul ul ul > li > a:hover,
.dark nav.toc ul ul ul > li > a:hover {
  color: var(--color-primary-300) !important;
  background-color: rgba(233, 110, 31, 0.08);
}

/* Active section highlighting */
.toc > ul > li > a.active {
  color: var(--color-primary-600);
  border-left-color: var(--color-primary-600);
  background-color: rgba(233, 110, 31, 0.1);
  font-weight: 700;
}

.toc ul ul > li > a.active {
  color: var(--color-primary-600);
  background-color: rgba(233, 110, 31, 0.1);
  font-weight: 600;
}

.toc ul ul ul > li > a.active {
  color: var(--color-primary-500);
  background-color: rgba(233, 110, 31, 0.08);
  font-weight: 500;
  font-style: normal;
}

.dark .toc > ul > li > a.active,
.dark .toc-container .toc > ul > li > a.active,
.dark nav.toc > ul > li > a.active {
  color: var(--color-primary-400) !important;
  border-left-color: var(--color-primary-400);
}

.dark .toc ul ul > li > a.active,
.dark .toc-container .toc ul ul > li > a.active,
.dark nav.toc ul ul > li > a.active {
  color: var(--color-primary-400) !important;
}

.dark .toc ul ul ul > li > a.active,
.dark .toc-container .toc ul ul ul > li > a.active,
.dark nav.toc ul ul ul > li > a.active {
  color: var(--color-primary-300) !important;
}

/* ToC Container Styles - Light/Dark Mode Support */
.toc-container {
  background: white;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  padding: 20px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.toc-title {
  margin: 0 0 15px 0;
  font-size: 18px;
  font-weight: bold;
  color: #374151;
}

/* Dark mode ToC container */
.dark .toc-container {
  background: #1f2937;
  border: 1px solid #374151;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

.dark .toc-title {
  color: #f9fafb;
}

/* ToC Display Logic */
/* Wide screens: show sidebar ToC, hide inline ToC */
.toc-sidebar {
  display: block !important;
}

.toc-inline {
  display: none !important;
}

/* Narrow screens: hide sidebar ToC, show inline ToC */
@media (max-width: 1200px) {
  .toc-sidebar {
    display: none !important;
  }

  .toc-inline {
    display: block !important;
    margin: 0 0 2rem 0;
    padding: 0;
  }

  .toc-inline .toc-container {
    max-width: none;
  }
}

/* Dark Mode Code Block Improvements */
.dark .prose code {
  background-color: #1f2937 !important;
  color: #e5e7eb !important;
  border: 1px solid #374151;
  border-radius: 4px;
  padding: 2px 4px;
}

.dark .prose pre {
  background-color: #1f2937 !important;
  border: 1px solid #374151;
}

.dark .prose pre code {
  background-color: transparent !important;
  border: none;
  padding: 0;
}

/* Syntax highlighting for dark mode */
.dark .prose .highlight .c,
.dark .prose .highlight .cm,
.dark .prose .highlight .c1 {
  color: #6b7280 !important; /* comments - gray */
}

.dark .prose .highlight .k,
.dark .prose .highlight .kd,
.dark .prose .highlight .kn {
  color: #8b5cf6 !important; /* keywords - purple */
}

.dark .prose .highlight .s,
.dark .prose .highlight .s1,
.dark .prose .highlight .s2,
.dark .prose .highlight .sb,
.dark .prose .highlight .sc {
  color: #10b981 !important; /* strings - green */
}

.dark .prose .highlight .m,
.dark .prose .highlight .mf,
.dark .prose .highlight .mi,
.dark .prose .highlight .mo {
  color: #f59e0b !important; /* numbers - amber */
}

.dark .prose .highlight .n,
.dark .prose .highlight .nf {
  color: #60a5fa !important; /* functions/variables - blue */
}

.dark .prose .highlight .o,
.dark .prose .highlight .ow {
  color: #f87171 !important; /* operators - red (improved visibility) */
}

.dark .prose .highlight .p {
  color: #d1d5db !important; /* punctuation - light gray */
}

.dark .prose .highlight .na {
  color: #34d399 !important; /* attributes - emerald */
}

.dark .prose .highlight .nb {
  color: #a78bfa !important; /* builtins - violet */
}

/* Component links without underlines */
.component-link {
  text-decoration: none !important;
}

.component-link:hover {
  text-decoration: none !important;
}

/* Image Lightbox Overlay System */
.lightbox-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.lightbox-overlay.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-content {
  position: relative;
  max-width: none;
  max-height: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow: auto;
  max-height: 95vh;
  max-width: 95vw;
}

.lightbox-image {
  width: auto;
  height: auto;
  min-width: 0;
  min-height: 0;
  object-fit: contain;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  border-radius: 8px;
}

.lightbox-caption {
  color: white;
  text-align: center;
  margin-top: 1rem;
  font-size: 1.1rem;
  max-width: 80vw;
}

.lightbox-close {
  position: absolute;
  top: 15px;
  right: 15px;
  background: rgba(0, 0, 0, 0.7);
  border: 2px solid rgba(255, 255, 255, 0.3);
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  z-index: 1001;
}

.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.6);
  transform: scale(1.1);
}

/* Clickable images styling */
.clickable-image {
  cursor: zoom-in;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.clickable-image:hover {
  transform: scale(1.02);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Dark mode adjustments */
.dark .lightbox-close:hover {
  background: rgba(255, 255, 255, 0.3);
  border-color: rgba(255, 255, 255, 0.8);
  transform: scale(1.1);
}

/* Pagefind Search UI Overrides */
.pagefind-ui {
  --pagefind-ui-scale: 0.75;
  --pagefind-ui-primary: var(--brand-grad-start);
  --pagefind-ui-text: #e7e8ee;
  --pagefind-ui-background: #1a1b22;
  --pagefind-ui-border: #374151;
  --pagefind-ui-tag: #1f2937;
  --pagefind-ui-border-width: 1px;
  --pagefind-ui-border-radius: 8px;
  --pagefind-ui-font: inherit;
}

.pagefind-ui .pagefind-ui__search-input {
  background: #1f2937 !important;
  color: #f3f4f6 !important;
  border-color: #4b5563 !important;
}

.pagefind-ui .pagefind-ui__search-input::placeholder {
  color: #9ca3af !important;
}

.pagefind-ui .pagefind-ui__result-link {
  color: var(--brand-grad-start) !important;
}

.pagefind-ui .pagefind-ui__result-link:hover {
  color: #ff9a4d !important;
}

.pagefind-ui .pagefind-ui__result-excerpt {
  color: #d1d5db !important;
}

.pagefind-ui .pagefind-ui__message {
  color: #9ca3af !important;
}

.pagefind-ui .pagefind-ui__result {
  border-top-color: #374151 !important;
}

.pagefind-ui .pagefind-ui__button {
  background: #374151 !important;
  color: #e7e8ee !important;
}

.pagefind-ui .pagefind-ui__button:hover {
  background: #4b5563 !important;
}

/* ========================================
   Atlas Solar System
   ======================================== */

@keyframes atlas-orbit-spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

.atlas-orbit {
  transform-origin: 18px 18px;
}

/* Paused by default — runs on hover or landing */
.atlas-orbit-1 { animation: atlas-orbit-spin 3s linear infinite paused; }
.atlas-orbit-2 { animation: atlas-orbit-spin 5s linear infinite paused; animation-direction: reverse; }
.atlas-orbit-3 { animation: atlas-orbit-spin 8s linear infinite paused; }

/* Hover activates orbits */
a:hover .atlas-orbit,
a:focus .atlas-orbit {
  animation-play-state: running;
}

/* Landing page first-visit auto-play */
.atlas-solar.atlas-active .atlas-orbit {
  animation-play-state: running;
}

/* Atlas pill — gradient border to distinguish from regular menu items */
.atlas-pill {
  position: relative;
  border: 1.5px solid transparent;
  background-image: linear-gradient(var(--brand-bg, #0f1014), var(--brand-bg, #0f1014)),
                     linear-gradient(135deg, #8b4a2a, #8b3254, #5a2a8b);
  background-origin: border-box;
  background-clip: padding-box, border-box;
  transition: all 0.3s ease;
}

.atlas-pill:hover {
  background-image: linear-gradient(rgba(30,15,25,0.9), rgba(20,10,30,0.9)),
                     linear-gradient(135deg, #a85a35, #a84065, #6a3aab);
}


/* ========================================
   Tips Page — Filterable List
   ======================================== */

/* ---------- Layout ---------- */
.tips-page-layout {
  display: grid;
  grid-template-columns: 1fr 220px;
  grid-template-areas: "main sidebar";
  gap: 2.5rem;
  align-items: start;
}

.tips-grid-area  { grid-area: main; }
.tips-sidebar    { grid-area: sidebar; }

/* ---------- Tip Cards ---------- */
.tips-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.tip-card {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 0.75rem;
  padding: 1.25rem 1.5rem;
  box-shadow: 0 1px 4px rgba(0,0,0,.06);
  transition: box-shadow 0.2s ease, transform 0.2s ease, opacity 0.25s ease;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.tip-card:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,.12);
  transform: translateY(-2px);
}

/* Show/hide with smooth fade */
.tip-card-hidden {
  display: none;
}

.tip-card-visible {
  display: flex;
}

.dark .tip-card {
  background: #1f2937;
  border-color: #374151;
  box-shadow: 0 1px 4px rgba(0,0,0,.3);
}

.dark .tip-card:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,.5);
}

.tip-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tip-card-badges {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.tip-card-date {
  font-size: 0.75rem;
  color: #9ca3af;
  white-space: nowrap;
}

.tip-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.35;
  margin: 0.25rem 0 0;
  color: #111827;
}

.dark .tip-card-title {
  color: #f3f4f6;
}

.tip-card-link {
  text-decoration: none;
  color: inherit;
  transition: color 0.15s ease;
}

.tip-card-link:hover {
  color: var(--color-primary-600);
}

.dark .tip-card-link:hover {
  color: var(--color-primary-400);
}

.tip-card-preview {
  font-size: 0.9rem;
  line-height: 1.6;
  color: #4b5563;
  margin: 0;
  flex: 1;
}

.dark .tip-card-preview {
  color: #9ca3af;
}

.tip-card-read-more {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary-600);
  text-decoration: none;
  align-self: flex-start;
  margin-top: 0.25rem;
  transition: color 0.15s ease;
}

.tip-card-read-more:hover {
  color: var(--color-primary-400);
  text-decoration: underline;
}

.dark .tip-card-read-more {
  color: var(--color-primary-400);
}

.dark .tip-card-read-more:hover {
  color: var(--color-primary-300);
}

/* ---------- Badges (shared between list + single) ---------- */
.tip-badge {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  border-radius: 9999px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
  line-height: 1.4;
}

/* Difficulty badges */
.tip-badge-diff-beginner      { background: #dcfce7; color: #166534; }
.tip-badge-diff-intermediate  { background: #fef9c3; color: #854d0e; }
.tip-badge-diff-advanced      { background: #fee2e2; color: #991b1b; }

.dark .tip-badge-diff-beginner      { background: #14532d; color: #bbf7d0; }
.dark .tip-badge-diff-intermediate  { background: #713f12; color: #fef08a; }
.dark .tip-badge-diff-advanced      { background: #7f1d1d; color: #fecaca; }

/* Category badges */
.tip-badge-command      { background: #ede9fe; color: #5b21b6; }
.tip-badge-concept      { background: #e0f2fe; color: #075985; }
.tip-badge-workflow     { background: #fce7f3; color: #9d174d; }
.tip-badge-gotcha       { background: #fff7ed; color: #9a3412; }
.tip-badge-integration  { background: #f0fdf4; color: #15803d; }
.tip-badge-performance  { background: #f0f9ff; color: #0369a1; }

.dark .tip-badge-command      { background: #3b0764; color: #ddd6fe; }
.dark .tip-badge-concept      { background: #0c4a6e; color: #bae6fd; }
.dark .tip-badge-workflow     { background: #500724; color: #fbcfe8; }
.dark .tip-badge-gotcha       { background: #431407; color: #fed7aa; }
.dark .tip-badge-integration  { background: #052e16; color: #bbf7d0; }
.dark .tip-badge-performance  { background: #082f49; color: #bae6fd; }

/* ---------- Filter Status Bar ---------- */
.tips-filter-status {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding: 0.5rem 0.75rem;
  background: rgba(233, 110, 31, 0.08);
  border: 1px solid rgba(233, 110, 31, 0.25);
  border-radius: 0.5rem;
  font-size: 0.85rem;
  color: #6b7280;
}

.dark .tips-filter-status {
  background: rgba(233, 110, 31, 0.12);
  border-color: rgba(233, 110, 31, 0.3);
  color: #9ca3af;
}

.tips-filter-count-text {
  font-weight: 500;
  color: #374151;
}

.dark .tips-filter-count-text {
  color: #d1d5db;
}

.tips-clear-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-primary-600);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0;
  text-decoration: underline;
  transition: color 0.15s;
}

.tips-clear-btn:hover {
  color: var(--color-primary-400);
}

/* ---------- Empty state ---------- */
.tips-empty {
  padding: 2rem;
  text-align: center;
  color: #6b7280;
  font-size: 0.95rem;
}

.dark .tips-empty {
  color: #9ca3af;
}

/* ---------- Sidebar ---------- */
.tips-sidebar {
  position: sticky;
  top: 5rem;
}

.tips-sidebar-inner {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 0.75rem;
  overflow: hidden;
  box-shadow: 0 1px 4px rgba(0,0,0,.06);
}

.dark .tips-sidebar-inner {
  background: #1f2937;
  border-color: #374151;
}

.tips-sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem 0;
}

.tips-sidebar-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: #111827;
  margin: 0;
  letter-spacing: 0.01em;
}

.dark .tips-sidebar-title {
  color: #f3f4f6;
}

/* Toggle button — desktop: hidden, mobile: shown */
.tips-sidebar-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: #374151;
  padding: 0.5rem 0;
}

.dark .tips-sidebar-toggle {
  color: #d1d5db;
}

.tips-toggle-icon {
  transition: transform 0.2s ease;
}

.tips-sidebar-body {
  padding: 1rem 1.25rem 1.25rem;
}

.tips-sidebar-body-collapsed {
  display: none;
}

.tips-reset-btn {
  display: none;
  margin-bottom: 1rem;
  padding: 0.3rem 0.75rem;
  background: none;
  border: 1px solid var(--color-primary-600);
  border-radius: 9999px;
  color: var(--color-primary-600);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.tips-reset-btn:hover {
  background: var(--color-primary-600);
  color: #fff;
}

.dark .tips-reset-btn {
  border-color: var(--color-primary-400);
  color: var(--color-primary-400);
}

.dark .tips-reset-btn:hover {
  background: var(--color-primary-400);
  color: #111;
}

/* ---------- Filter Groups ---------- */
.tips-filter-group {
  margin-bottom: 1.25rem;
}

.tips-filter-group:last-child {
  margin-bottom: 0;
}

.tips-filter-group-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #9ca3af;
  margin: 0 0 0.6rem;
}

.tips-filter-options {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

/* ---------- Filter Buttons ---------- */
.tips-filter-btn {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.35rem 0.7rem;
  border-radius: 9999px;
  border: 1.5px solid transparent;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: capitalize;
  cursor: pointer;
  transition: opacity 0.15s, border-color 0.15s, box-shadow 0.15s;
  background: none;
  opacity: 0.7;
}

.tips-filter-btn:hover {
  opacity: 1;
}

/* Active state — ring highlight */
.tips-filter-btn-active {
  opacity: 1 !important;
  border-color: currentColor !important;
  box-shadow: 0 0 0 2px rgba(233,110,31,0.25);
}

/* Difficulty filter button colours (match badges) */
.tips-badge-diff-beginner      { background: #dcfce7; color: #166534; }
.tips-badge-diff-intermediate  { background: #fef9c3; color: #854d0e; }
.tips-badge-diff-advanced      { background: #fee2e2; color: #991b1b; }

.dark .tips-badge-diff-beginner      { background: #14532d; color: #bbf7d0; }
.dark .tips-badge-diff-intermediate  { background: #713f12; color: #fef08a; }
.dark .tips-badge-diff-advanced      { background: #7f1d1d; color: #fecaca; }

/* Category filter button colours (match badges) */
.tips-badge-cat-command      { background: #ede9fe; color: #5b21b6; }
.tips-badge-cat-concept      { background: #e0f2fe; color: #075985; }
.tips-badge-cat-workflow     { background: #fce7f3; color: #9d174d; }
.tips-badge-cat-gotcha       { background: #fff7ed; color: #9a3412; }
.tips-badge-cat-integration  { background: #f0fdf4; color: #15803d; }
.tips-badge-cat-performance  { background: #f0f9ff; color: #0369a1; }

.dark .tips-badge-cat-command      { background: #3b0764; color: #ddd6fe; }
.dark .tips-badge-cat-concept      { background: #0c4a6e; color: #bae6fd; }
.dark .tips-badge-cat-workflow     { background: #500724; color: #fbcfe8; }
.dark .tips-badge-cat-gotcha       { background: #431407; color: #fed7aa; }
.dark .tips-badge-cat-integration  { background: #052e16; color: #bbf7d0; }
.dark .tips-badge-cat-performance  { background: #082f49; color: #bae6fd; }

/* ---------- Single tip page ---------- */
.tip-single-badges {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.tip-single-command {
  background: rgba(255,255,255,0.2);
  color: #fff;
  border-radius: 0.25rem;
  padding: 0.1rem 0.4rem;
  font-family: ui-monospace, monospace;
  font-size: 0.85em;
}

.tip-back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  color: var(--color-primary-600);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: color 0.15s;
}

.tip-back-link:hover {
  color: var(--color-primary-400);
  text-decoration: underline;
}

.dark .tip-back-link {
  color: var(--color-primary-400);
}

.dark .tip-back-link:hover {
  color: var(--color-primary-300);
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .tips-page-layout {
    grid-template-columns: 1fr;
    grid-template-areas:
      "sidebar"
      "main";
  }

  .tips-sidebar {
    position: static;
  }

  .tips-sidebar-inner {
    border-radius: 0.75rem;
  }

  /* Show toggle button on mobile */
  .tips-sidebar-toggle {
    display: flex;
  }

  /* Hide the desktop title (toggle button has label) */
  .tips-sidebar-title {
    display: none;
  }

  /* Collapse sidebar body by default on mobile */
  #tips-sidebar-body {
    display: none;
  }

  /* When expanded via JS, show it */
  #tips-sidebar-body:not(.tips-sidebar-body-collapsed) {
    display: block;
  }

  /* On mobile, filter buttons in a wrapping row */
  .tips-filter-options {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .tips-filter-btn {
    width: auto;
  }
}