/* ============================================================
   Design tokens — light theme (default)
   ============================================================ */
:root {
  /* Backgrounds */
  --bg:            #f5f4f0;
  --panel-bg:      #ffffff;
  --header-bg:     #1a1a2e;

  /* Text */
  --text:          #1a1a1a;
  --text-muted:    #5a5a6a;
  --text-on-header:#e8e6f0;

  /* Borders & decoration */
  --border:        #d8d6d0;
  --panel-shadow:  0 1px 3px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.06);
  --panel-shadow-hover: 0 4px 8px rgba(0, 0, 0, 0.12), 0 8px 24px rgba(0, 0, 0, 0.10);

  /* Accent / links */
  --accent:        #4a3f9e;
  --link:          #3d32a0;
  --link-hover:    #1e1668;
  --focus-ring:    #4a3f9e;
  --btn-bg:        #4a3f9e;
  --btn-text:      #ffffff;
  --btn-hover-bg:  #3a2f8e;

  /* Badge: Logseq CLI — teal/green */
  --badge-cli-bg:  #d6f5ef;
  --badge-cli-fg:  #0d5a47;

  /* Badge: Logseq HTTP API — blue */
  --badge-http-bg: #dceeff;
  --badge-http-fg: #0d3d7a;

  /* Badge: Logseq Plugin — violet */
  --badge-plugin-bg: #ede8ff;
  --badge-plugin-fg: #3d1f8a;

  /* Badge: Standalone utility — amber */
  --badge-standalone-bg: #fff3d4;
  --badge-standalone-fg: #6b3d00;

  /* Typography */
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-size-base: 1rem;
  --line-height: 1.6;

  /* Spacing */
  --gap: 1.25rem;
  --panel-padding: 1.5rem;
  --radius: 0.625rem;
  --max-width: 1200px;
}

/* ============================================================
   Dark theme overrides
   ============================================================ */
[data-theme="dark"] {
  --bg:            #0f0f14;
  --panel-bg:      #1a1a24;
  --header-bg:     #0a0a12;

  --text:          #eeeaf8;
  --text-muted:    #9990b8;
  --text-on-header:#eeeaf8;

  --border:        #2e2a40;
  --panel-shadow:  0 1px 3px rgba(0, 0, 0, 0.40), 0 4px 12px rgba(0, 0, 0, 0.30);
  --panel-shadow-hover: 0 4px 8px rgba(0, 0, 0, 0.50), 0 8px 24px rgba(0, 0, 0, 0.40);

  --accent:        #8b7ff0;
  --link:          #9b8ff8;
  --link-hover:    #bbb0ff;
  --focus-ring:    #9b8ff8;
  --btn-bg:        #5a4fd4;
  --btn-text:      #ffffff;
  --btn-hover-bg:  #7060e8;

  /* Badge: Logseq CLI — teal/green, dark */
  --badge-cli-bg:  #0d3328;
  --badge-cli-fg:  #4dd4ac;

  /* Badge: Logseq HTTP API — blue, dark */
  --badge-http-bg: #0a1f3d;
  --badge-http-fg: #60aaff;

  /* Badge: Logseq Plugin — violet, dark */
  --badge-plugin-bg: #1a1040;
  --badge-plugin-fg: #b49eff;

  /* Badge: Standalone utility — amber, dark */
  --badge-standalone-bg: #2a1800;
  --badge-standalone-fg: #fbbf24;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: var(--line-height);
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background 0.2s ease, color 0.2s ease;
}

/* ============================================================
   Focus visible
   ============================================================ */
:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 3px;
  border-radius: 3px;
}

/* ============================================================
   Links
   ============================================================ */
a {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--link-hover);
}

/* ============================================================
   Site header
   ============================================================ */
.site-header {
  background: var(--header-bg);
  color: var(--text-on-header);
  padding: 1.75rem 1rem;
  border-bottom: 3px solid var(--accent);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.header-text {
  flex: 1 1 0;
  min-width: 0;
}

.site-title {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #ffffff;
  line-height: 1.2;
}

.site-tagline {
  margin-top: 0.35rem;
  font-size: 0.9375rem;
  color: var(--text-on-header);
  opacity: 0.85;
}

.tagline-link {
  color: var(--text-on-header);
  opacity: 1;
  font-weight: 600;
}

.tagline-link:hover {
  color: #ffffff;
  opacity: 1;
}

/* ============================================================
   Theme toggle
   ============================================================ */
.theme-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1.5px solid rgba(255, 255, 255, 0.25);
  color: var(--text-on-header);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.45rem 0.85rem;
  border-radius: 2rem;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s ease, border-color 0.15s ease;
  flex-shrink: 0;
}

.theme-toggle:hover {
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.45);
}

.theme-toggle:focus-visible {
  outline: 3px solid rgba(255, 255, 255, 0.8);
  outline-offset: 3px;
}

.toggle-icon {
  font-size: 1rem;
  line-height: 1;
}

/* ============================================================
   Main content area
   ============================================================ */
main {
  flex: 1;
  padding: 2rem 1rem 3rem;
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
}

/* ============================================================
   Responsive grid — explicit breakpoints
   ============================================================ */
.project-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}

@media (min-width: 700px) {
  .project-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1100px) {
  .project-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ============================================================
   Panel / card
   ============================================================ */
.panel {
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--panel-padding);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  box-shadow: var(--panel-shadow);
  transition: box-shadow 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}

.panel:hover {
  box-shadow: var(--panel-shadow-hover);
  transform: translateY(-2px);
  border-color: var(--accent);
}

.panel-title {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
  line-height: 1.3;
}

.panel-description {
  font-size: 0.9375rem;
  color: var(--text);
  line-height: 1.65;
  max-width: 55ch;
  flex: 1;
}

/* ============================================================
   Integration badge
   ============================================================ */
.badge-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.badge-prefix {
  /* visually hidden but read by screen readers */
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  padding: 0.2em 0.65em;
  border-radius: 1rem;
  line-height: 1.5;
}

.badge--cli {
  background: var(--badge-cli-bg);
  color: var(--badge-cli-fg);
}

.badge--http {
  background: var(--badge-http-bg);
  color: var(--badge-http-fg);
}

.badge--plugin {
  background: var(--badge-plugin-bg);
  color: var(--badge-plugin-fg);
}

.badge--standalone {
  background: var(--badge-standalone-bg);
  color: var(--badge-standalone-fg);
}

/* ============================================================
   Panel meta lines
   ============================================================ */
.panel-runtime {
  font-size: 0.8125rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.panel-runtime::before {
  content: '⚙';
  opacity: 0.6;
  font-size: 0.75rem;
}

.panel-updated {
  font-size: 0.8125rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.panel-updated::before {
  content: '↻';
  opacity: 0.6;
  font-size: 0.875rem;
}

.panel-updated time {
  font-variant-numeric: tabular-nums;
}

/* ============================================================
   Repo button / link
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--btn-bg);
  color: var(--btn-text);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.45rem 1rem;
  border-radius: 0.375rem;
  margin-top: auto;
  align-self: flex-start;
  transition: background 0.15s ease, transform 0.1s ease;
  white-space: nowrap;
}

.btn:hover {
  background: var(--btn-hover-bg);
  color: var(--btn-text);
  transform: translateY(-1px);
  text-decoration: none;
}

.btn:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 3px;
}

.btn-icon {
  font-size: 0.8125rem;
  opacity: 0.85;
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.25rem 1rem;
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.site-footer a {
  color: var(--link);
}

/* ============================================================
   Loading state note (non-blocking)
   ============================================================ */
#footer-date-note {
  font-style: italic;
  font-size: 0.8125rem;
}