/* ========================================================================
   DataDepo Documentation — Design Tokens & Styles
   ======================================================================== */

/* -- Type Scale --------------------------------------------------------- */
:root {
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.8125rem);
  --text-sm:   clamp(0.8125rem, 0.78rem + 0.2vw, 0.875rem);
  --text-base: clamp(0.9375rem, 0.9rem + 0.15vw, 1rem);
  --text-lg:   clamp(1.125rem, 1.05rem + 0.4vw, 1.3125rem);
  --text-xl:   clamp(1.375rem, 1.2rem  + 0.75vw, 1.75rem);
  --text-2xl:  clamp(1.75rem,  1.3rem  + 1.5vw, 2.5rem);
}

/* -- Spacing ------------------------------------------------------------- */
:root {
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
}

/* -- Radius / Transitions ----------------------------------------------- */
:root {
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* -- Content widths ----------------------------------------------------- */
:root {
  --sidebar-width: 272px;
  --content-max: 920px;
  --toc-width: 220px;
}

/* -- Fonts -------------------------------------------------------------- */
:root {
  --font-body: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --font-display: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
}

/* ========================================================================
   Color — DataDepo Brand
   Derived from the app's blue (#29ABE2) with neutral surfaces
   ======================================================================== */

:root, [data-theme="light"] {
  --color-bg:             #f8f9fb;
  --color-surface:        #ffffff;
  --color-surface-2:      #f3f5f8;
  --color-surface-offset: #edf0f5;
  --color-border:         #dce1e8;
  --color-border-light:   #e8ecf2;
  --color-divider:        #e8ecf2;

  --color-text:           #1a1f2e;
  --color-text-muted:     #5f6980;
  --color-text-faint:     #97a0b5;

  --color-primary:        #1a8dba;
  --color-primary-hover:  #157aa3;
  --color-primary-active: #106689;
  --color-primary-light:  #e8f4fa;
  --color-primary-bg:     #f0f8fc;

  --color-sidebar-bg:     #1b2332;
  --color-sidebar-text:   #c5ccda;
  --color-sidebar-muted:  #7e8a9e;
  --color-sidebar-active: rgba(26, 141, 186, 0.15);
  --color-sidebar-active-text: #5cc1ed;
  --color-sidebar-hover:  rgba(255,255,255, 0.05);
  --color-sidebar-border: rgba(255,255,255, 0.06);
  --color-sidebar-category: #8a94a8;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.02);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
}

[data-theme="dark"] {
  --color-bg:             #111520;
  --color-surface:        #1a1f2e;
  --color-surface-2:      #1e2435;
  --color-surface-offset: #242a3c;
  --color-border:         #2d3448;
  --color-border-light:   #262d40;
  --color-divider:        #262d40;

  --color-text:           #cdd2de;
  --color-text-muted:     #8690a5;
  --color-text-faint:     #5a6378;

  --color-primary:        #4fb8e0;
  --color-primary-hover:  #3aadd6;
  --color-primary-active: #2a9cc5;
  --color-primary-light:  rgba(79,184,224,0.1);
  --color-primary-bg:     rgba(79,184,224,0.05);

  --color-sidebar-bg:     #0d1019;
  --color-sidebar-text:   #a8b0c2;
  --color-sidebar-muted:  #5d6578;
  --color-sidebar-active: rgba(79,184,224,0.12);
  --color-sidebar-active-text: #5cc1ed;
  --color-sidebar-hover:  rgba(255,255,255,0.04);
  --color-sidebar-border: rgba(255,255,255,0.04);
  --color-sidebar-category: #6b748a;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
}

/* prefers-color-scheme dark removed — light is the default.
   Users can switch to dark via the toggle button. */

/* ========================================================================
   Layout
   ======================================================================== */

.layout {
  display: flex;
  min-height: 100dvh;
}

/* -- Sidebar ------------------------------------------------------------ */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--color-sidebar-bg);
  overflow-y: auto;
  overflow-x: hidden;
  z-index: 40;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--color-sidebar-border);
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.1) transparent;
}

.sidebar-logo {
  padding: var(--space-5) var(--space-5);
  border-bottom: 1px solid var(--color-sidebar-border);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}

.sidebar-logo svg {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.sidebar-logo-text {
  display: flex;
  flex-direction: column;
}

.sidebar-logo-text span:first-child {
  font-weight: 700;
  font-size: var(--text-sm);
  color: #fff;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.sidebar-logo-text span:last-child {
  font-size: var(--text-xs);
  color: var(--color-sidebar-muted);
  line-height: 1.3;
}

.sidebar-nav {
  flex: 1;
  padding: var(--space-4) 0;
}

.sidebar-category {
  padding: 0 var(--space-5);
  margin-top: var(--space-4);
}

.sidebar-category:first-child {
  margin-top: 0;
}

.sidebar-category-title {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-sidebar-category);
  padding: var(--space-2) 0;
  user-select: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.sidebar-category-title svg {
  width: 14px;
  height: 14px;
  transition: transform var(--transition-interactive);
  flex-shrink: 0;
  opacity: 0.5;
}

.sidebar-category.collapsed .sidebar-category-title svg {
  transform: rotate(-90deg);
}

.sidebar-category-links {
  list-style: none;
  padding: 0;
  overflow: hidden;
  transition: max-height 250ms cubic-bezier(0.16, 1, 0.3, 1), opacity 200ms ease;
  max-height: 500px;
  opacity: 1;
}

.sidebar-category.collapsed .sidebar-category-links {
  max-height: 0;
  opacity: 0;
}

.sidebar-link {
  display: block;
  padding: 6px var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-sidebar-text);
  text-decoration: none;
  border-radius: var(--radius-sm);
  line-height: 1.45;
  margin-bottom: 1px;
}

.sidebar-link:hover {
  background: var(--color-sidebar-hover);
  color: #fff;
}

.sidebar-link.active {
  background: var(--color-sidebar-active);
  color: var(--color-sidebar-active-text);
  font-weight: 500;
}

.sidebar-footer {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-sidebar-border);
  flex-shrink: 0;
}

.sidebar-footer a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-sidebar-muted);
  text-decoration: none;
}

.sidebar-footer a:hover {
  color: var(--color-sidebar-text);
}

.sidebar-footer a svg {
  width: 14px;
  height: 14px;
}

/* -- Main content ------------------------------------------------------- */
.main {
  margin-left: var(--sidebar-width);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
  overflow-x: hidden;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  background: oklch(from var(--color-bg) l c h / 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
  padding: 0 var(--space-8);
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  min-width: 0;
}

.breadcrumb a {
  color: var(--color-text-muted);
  text-decoration: none;
  white-space: nowrap;
}

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

.breadcrumb-sep {
  color: var(--color-text-faint);
  flex-shrink: 0;
}

.breadcrumb-current {
  color: var(--color-text);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  cursor: pointer;
}

.theme-toggle:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
}

.topbar-link {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-decoration: none;
  padding: 6px var(--space-3);
  border-radius: var(--radius-md);
  white-space: nowrap;
}

.topbar-link:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
}

/* -- Content area ------------------------------------------------------- */
.content-area {
  flex: 1;
  padding: var(--space-10) var(--space-8);
  max-width: 1400px;
}

/* -- Homepage ----------------------------------------------------------- */
.home-hero {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-10) var(--space-8);
  margin-bottom: var(--space-8);
  text-align: center;
}

.home-header {
  margin-bottom: var(--space-6);
}

.home-header h1 {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
  letter-spacing: -0.02em;
}

.home-header p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 520px;
  margin: 0 auto;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-5);
}

.category-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: box-shadow var(--transition-interactive), border-color var(--transition-interactive);
}

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

.category-card-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.category-card-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: var(--color-primary-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.category-card-icon svg {
  width: 20px;
  height: 20px;
  color: var(--color-primary);
}

.category-card-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.category-card-count {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-left: auto;
  white-space: nowrap;
}

.category-card-list {
  list-style: none;
  padding: 0;
}

.category-card-list li {
  border-top: 1px solid var(--color-divider);
}

.category-card-list li:first-child {
  border-top: none;
}

.category-card-list a {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 10px 0;
  font-size: var(--text-sm);
  color: var(--color-text);
  text-decoration: none;
  line-height: 1.4;
}

.category-card-list a:hover {
  color: var(--color-primary);
}

.category-card-list a svg {
  width: 15px;
  height: 15px;
  color: var(--color-text-faint);
  flex-shrink: 0;
  transition: transform var(--transition-interactive), color var(--transition-interactive);
}

.category-card-list a:hover svg {
  transform: translateX(2px);
  color: var(--color-primary);
}

/* -- Article page ------------------------------------------------------- */
.article-layout {
  display: flex;
  gap: var(--space-10);
  max-width: 1280px;
}

.article-content {
  flex: 1;
  min-width: 0;
  max-width: var(--content-max);
}

.article-content h1 {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-4);
  letter-spacing: -0.02em;
  word-break: break-word;
  overflow-wrap: break-word;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-bottom: var(--space-10);
  padding-bottom: var(--space-6);
  border-bottom: 2px solid var(--color-border);
}

.article-meta svg {
  width: 14px;
  height: 14px;
  margin-right: 4px;
  vertical-align: -2px;
}

.article-body h2 {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-top: var(--space-20);
  margin-bottom: var(--space-5);
  padding: var(--space-4) var(--space-5);
  background: var(--color-surface-2);
  border-left: 3px solid var(--color-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  letter-spacing: -0.01em;
}

.article-body h2:first-child {
  margin-top: 0;
}

.article-body h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-top: var(--space-12);
  margin-bottom: var(--space-4);
  padding-left: var(--space-4);
  border-left: 3px solid var(--color-primary-light);
}

.article-body h4 {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text-muted);
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-size: var(--text-sm);
}

.article-body p {
  margin-bottom: var(--space-5);
  color: var(--color-text);
  line-height: 1.75;
}

.article-body ul, .article-body ol {
  margin-bottom: var(--space-6);
  padding-left: var(--space-6);
}

.article-body ul {
  list-style: none;
  padding-left: 0;
}

.article-body ul > li {
  position: relative;
  padding-left: var(--space-6);
  margin-bottom: var(--space-3);
  line-height: 1.7;
  color: var(--color-text);
}

.article-body ul > li::before {
  content: "";
  position: absolute;
  left: var(--space-1);
  top: 0.65em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  opacity: 0.6;
}

.article-body ul ul > li::before {
  background: transparent;
  border: 1.5px solid var(--color-primary);
  opacity: 0.5;
  width: 5px;
  height: 5px;
}

.article-body ol > li {
  margin-bottom: var(--space-3);
  line-height: 1.7;
  color: var(--color-text);
}

.article-body li strong {
  color: var(--color-text);
}

.article-body a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-color: oklch(from var(--color-primary) l c h / 0.3);
}

.article-body a:hover {
  text-decoration-color: var(--color-primary);
}

.article-body code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--color-surface-2);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  color: var(--color-primary);
}

.article-body pre {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  margin: var(--space-6) 0;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.65;
  max-width: 100%;
}

.article-body pre code {
  background: none;
  padding: 0;
  border-radius: 0;
  color: var(--color-text);
}

.article-body img {
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: var(--space-3);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  margin: var(--space-6) 0;
}

.callout {
  border-left: 3px solid var(--color-primary);
  background: var(--color-primary-bg);
  padding: var(--space-4) var(--space-5);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-bottom: var(--space-6);
}

.callout p {
  margin-bottom: 0;
  color: var(--color-text);
}

.callout strong {
  color: var(--color-primary);
}

.article-body blockquote {
  border-left: 3px solid var(--color-primary);
  background: var(--color-primary-bg);
  padding: var(--space-4) var(--space-5);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: var(--space-6) 0;
}

.article-body blockquote p {
  margin-bottom: 0;
  color: var(--color-text);
}

.article-body blockquote a {
  color: var(--color-primary);
}

/* -- Table of Contents (right side) ------------------------------------- */
.toc-aside {
  width: var(--toc-width);
  flex-shrink: 0;
  position: sticky;
  top: 72px;
  align-self: flex-start;
  max-height: calc(100dvh - 100px);
  overflow-y: auto;
}

.toc-title {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-faint);
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-2);
}

.toc-list {
  list-style: none;
  padding: 0;
  border-left: 1px solid var(--color-border-light);
}

.toc-list a {
  display: block;
  padding: 5px var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  margin-left: -1px;
  line-height: 1.45;
}

.toc-list a:hover {
  color: var(--color-text);
}

.toc-list a.active {
  color: var(--color-primary);
  border-left-color: var(--color-primary);
  font-weight: 500;
}

/* -- Article nav (prev / next) ------------------------------------------ */
.article-nav {
  display: flex;
  gap: var(--space-4);
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-divider);
}

.article-nav-link {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-4) var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}

.article-nav-link:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.article-nav-link.next {
  text-align: right;
  align-items: flex-end;
}

.article-nav-label {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 500;
}

.article-nav-title {
  font-size: var(--text-sm);
  color: var(--color-primary);
  font-weight: 500;
}

/* -- Footer ------------------------------------------------------------- */
.footer {
  padding: var(--space-5) var(--space-8);
  border-top: 1px solid var(--color-divider);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
}

.footer a {
  color: var(--color-text-faint);
  text-decoration: none;
}

.footer a:hover {
  color: var(--color-text-muted);
}

/* -- Mobile hamburger --------------------------------------------------- */
.mobile-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
}

.mobile-toggle svg {
  width: 20px;
  height: 20px;
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 39;
}

/* -- Responsive --------------------------------------------------------- */
@media (max-width: 1024px) {
  .toc-aside {
    display: none;
  }
}

@media (max-width: 768px) {
  .mobile-toggle {
    display: flex;
  }

  .sidebar {
    transform: translateX(-100%);
    transition: transform 300ms cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 50;
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-overlay.open {
    display: block;
  }

  .main {
    margin-left: 0;
  }

  .content-area {
    padding: var(--space-4);
    overflow-x: hidden;
  }

  .topbar {
    padding: 0 var(--space-4);
  }

  .category-grid {
    grid-template-columns: 1fr;
  }

  .article-layout {
    flex-direction: column;
  }

  .article-nav {
    flex-direction: column;
  }

  .article-content h1 {
    font-size: var(--text-xl);
  }

  .article-body h2 {
    font-size: var(--text-lg);
  }

  .article-meta {
    flex-wrap: wrap;
  }

  .home-header h1 {
    font-size: var(--text-xl);
  }

  .footer {
    flex-direction: column;
    gap: var(--space-2);
    text-align: center;
    padding: var(--space-4);
  }
}

/* -- Article body tables ------------------------------------------------ */
.article-body table {
  margin: var(--space-6) 0;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  font-size: var(--text-sm);
}

.article-body th {
  background: var(--color-surface-2);
  font-weight: 600;
  text-align: left;
  padding: 10px var(--space-4);
  border-bottom: 1px solid var(--color-border-light);
  color: var(--color-text);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.article-body td {
  padding: 10px var(--space-4);
  border-bottom: 1px solid var(--color-divider);
  color: var(--color-text);
}

.article-body tr:last-child td {
  border-bottom: none;
}

/* -- Search ------------------------------------------------------------- */
.search-trigger {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 6px var(--space-4) 6px var(--space-4);
  border-radius: var(--radius-lg);
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  cursor: pointer;
  white-space: nowrap;
  height: 40px;
  min-width: 260px;
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}

.search-trigger:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.search-trigger svg {
  width: 17px;
  height: 17px;
  flex-shrink: 0;
  color: var(--color-primary);
}

.search-trigger-text {
  flex: 1;
  text-align: left;
}

.search-trigger kbd {
  font-family: var(--font-body);
  font-size: 0.6875rem;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border-light);
  color: var(--color-text-faint);
  font-weight: 500;
  line-height: 1.4;
}

/* -- Home search bar ---------------------------------------------------- */
.home-search {
  max-width: 600px;
  margin: 0 auto var(--space-10);
}

.home-search-trigger {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-xl);
  border: 2px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-muted);
  font-size: var(--text-base);
  cursor: pointer;
  height: 56px;
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}

.home-search-trigger:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-primary-light);
}

.home-search-trigger svg {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  color: var(--color-primary);
}

.home-search-trigger span {
  flex: 1;
  text-align: left;
  color: var(--color-text-faint);
}

.home-search-trigger kbd {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border-light);
  color: var(--color-text-faint);
  font-weight: 500;
}

@media (max-width: 768px) {
  .search-trigger {
    min-width: 40px;
    padding: 6px;
  }
  .search-trigger-text,
  .search-trigger kbd {
    display: none;
  }
  .home-search-trigger {
    height: 48px;
    font-size: var(--text-sm);
  }
  .home-search-trigger kbd {
    display: none;
  }
}

.search-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(4px);
  align-items: flex-start;
  justify-content: center;
  padding-top: min(20vh, 140px);
}

.search-overlay.open {
  display: flex;
}

.search-dialog {
  width: min(560px, calc(100vw - 32px));
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2), 0 0 0 1px rgba(0,0,0,0.04);
  overflow: hidden;
  animation: search-dialog-in 200ms cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes search-dialog-in {
  from { opacity: 0; transform: scale(0.96) translateY(-8px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.search-input-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-divider);
}

.search-input-wrap svg {
  width: 18px;
  height: 18px;
  color: var(--color-text-faint);
  flex-shrink: 0;
}

.search-input {
  flex: 1;
  border: none;
  outline: none;
  background: none;
  font-size: var(--text-base);
  color: var(--color-text);
  line-height: 1.5;
}

.search-input::placeholder {
  color: var(--color-text-faint);
}

.search-close-hint {
  font-size: 0.625rem;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border-light);
  color: var(--color-text-faint);
  font-weight: 500;
  flex-shrink: 0;
  cursor: pointer;
}

.search-results {
  max-height: min(400px, 50vh);
  overflow-y: auto;
  padding: var(--space-2);
}

.search-empty {
  padding: var(--space-8) var(--space-5);
  text-align: center;
  color: var(--color-text-faint);
  font-size: var(--text-sm);
}

.search-empty svg {
  width: 32px;
  height: 32px;
  margin: 0 auto var(--space-3);
  opacity: 0.4;
}

.search-result-item {
  display: block;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  transition: background var(--transition-interactive);
}

.search-result-item:hover,
.search-result-item.focused {
  background: var(--color-surface-2);
}

.search-result-title {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 2px;
  line-height: 1.4;
}

.search-result-title mark {
  background: rgba(26, 141, 186, 0.15);
  color: var(--color-primary);
  border-radius: 2px;
  padding: 0 1px;
}

[data-theme="dark"] .search-result-title mark {
  background: rgba(79, 184, 224, 0.15);
}

.search-result-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.search-result-category {
  color: var(--color-primary);
}

.search-result-excerpt {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
  margin-top: 3px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.search-result-excerpt mark {
  background: rgba(26, 141, 186, 0.12);
  color: var(--color-primary);
  border-radius: 2px;
  padding: 0 1px;
}

[data-theme="dark"] .search-result-excerpt mark {
  background: rgba(79, 184, 224, 0.12);
}

.search-footer {
  padding: var(--space-2) var(--space-4);
  border-top: 1px solid var(--color-divider);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: 0.6875rem;
  color: var(--color-text-faint);
}

.search-footer kbd {
  font-family: var(--font-body);
  font-size: 0.5625rem;
  padding: 1px 4px;
  border-radius: 3px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border-light);
  color: var(--color-text-faint);
  font-weight: 500;
  margin-right: 2px;
}

.search-footer-item {
  display: flex;
  align-items: center;
  gap: 3px;
}

/* -- Tag / badge -------------------------------------------------------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.6875rem;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: var(--color-primary-light);
  color: var(--color-primary);
}

/* -- Lightbox --------------------------------------------------------------- */
.lightbox-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(4px);
  align-items: center;
  justify-content: center;
  cursor: zoom-out;
}

.lightbox-overlay.open {
  display: flex;
}

.lightbox-img {
  max-width: 90vw;
  max-height: 90vh;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  animation: lightbox-in 200ms cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes lightbox-in {
  from { opacity: 0; transform: scale(0.92); }
  to { opacity: 1; transform: scale(1); }
}

.article-body img {
  cursor: zoom-in;
}