/*
 * swh.css — Unified Software Heritage theme
 * Works with: topics, trees, and org-parse
 *
 * Based on Software Heritage official brand guidelines
 * https://www.softwareheritage.org/communication-kit/
 *
 * Official color scheme:
 *   Red:          #e20026  (Primary brand color)
 *   Orange:       #ef4426  (Secondary accent)
 *   Light orange: #f79622  (Warm accent)
 *   Yellow:       #fabf1f  (Highlight accent)
 *
 * Supports dark mode via:
 *   - prefers-color-scheme (topics, trees, org-parse)
 *   - [data-theme=dark] attribute
 */

/* ==========================================================================
   1. CUSTOM PROPERTIES — Light Mode (default)
   ========================================================================== */

:root {
  /* Brand colors */
  --swh-red:           #e20026;
  --swh-orange:        #ef4426;
  --swh-light-orange:  #f79622;
  --swh-yellow:        #fabf1f;
  --swh-grey:          #737373;

  --swh-gradient: linear-gradient(90deg, #e20026 0%, #ef4426 33%, #f79622 66%, #fabf1f 100%);

  /* Light mode */
  --swh-red-hover:      #c90022;
  --swh-red-light:      #fce8eb;
  --swh-orange-light:   #fff8f5;
  --swh-grey-light:     #f5f5f5;
  --swh-grey-dark:      #333333;
  --swh-text:           #444444;
  --swh-text-muted:     #737373;
  --swh-border:         #e0e0e0;
  --swh-border-hover:   #c0c0c0;
  --swh-bg:             #ffffff;
  --swh-bg-elevated:    #ffffff;
  --swh-code-bg:        #f8f8f8;
  --swh-shadow:         rgba(0, 0, 0, 0.08);
  --swh-shadow-red:     rgba(226, 0, 38, 0.12);

  /* Trees status colors */
  --status-positive:    #18753c;
  --status-positive-bg: color-mix(in srgb, #18753c 10%, transparent);
  --status-neutral:     #0063cb;
  --status-neutral-bg:  color-mix(in srgb, #0063cb 10%, transparent);
  --status-caution:     var(--swh-orange);
  --status-caution-bg:  color-mix(in srgb, #ef4426 10%, transparent);
  --status-negative:    var(--swh-red);
  --status-negative-bg: color-mix(in srgb, #e20026 10%, transparent);

  /* Typography */
  --swh-font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
                     "Helvetica Neue", Arial, sans-serif;
  --swh-font-mono:   "SFMono-Regular", Consolas, "Liberation Mono", Menlo,
                     Courier, monospace;

  color-scheme: light dark;
}

/* Pico CSS overrides — must match Pico 2's selector specificity */
[data-theme=light],
:root:not([data-theme=dark]) {
  --pico-primary:             var(--swh-red);
  --pico-primary-hover:       var(--swh-red-hover);
  --pico-primary-focus:       rgba(226, 0, 38, 0.2);
  --pico-primary-inverse:     #ffffff;
  --pico-muted-color:         var(--swh-text-muted);
  --pico-muted-border-color:  var(--swh-border);

}

/* ==========================================================================
   2. DARK MODE — prefers-color-scheme
   ========================================================================== */

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --swh-red:           #ff2d4a;
    --swh-red-hover:     #ff5c73;
    --swh-red-light:     #3a1a20;
    --swh-orange-light:  #2d2420;
    --swh-grey-light:    #252525;
    --swh-grey-dark:     #e8e8e8;
    --swh-text:          #c8c8c8;
    --swh-text-muted:    #999999;
    --swh-border:        #404040;
    --swh-border-hover:  #606060;
    --swh-bg:            #1a1a1a;
    --swh-bg-elevated:   #222222;
    --swh-code-bg:       #2a2a2a;
    --swh-shadow:        rgba(0, 0, 0, 0.4);
    --swh-shadow-red:    rgba(255, 45, 74, 0.15);

    --pico-primary:             var(--swh-red);
    --pico-primary-hover:       var(--swh-red-hover);
    --pico-primary-focus:       rgba(255, 45, 74, 0.25);
    --pico-primary-inverse:     #ffffff;
    --pico-muted-color:         var(--swh-text-muted);
    --pico-muted-border-color:  var(--swh-border);
    --pico-accordion-open-summary-color: #c0c0c0;

    --swh-gradient: linear-gradient(90deg, #ff2d4a 0%, #ff5c3d 33%, #ffa033 66%, #ffc82e 100%);

    --status-positive:    #27a658;
    --status-positive-bg: color-mix(in srgb, #27a658 15%, transparent);
    --status-neutral:     #518fff;
    --status-neutral-bg:  color-mix(in srgb, #518fff 15%, transparent);
    --status-caution:     #ff5c3d;
    --status-caution-bg:  color-mix(in srgb, #ff5c3d 15%, transparent);
    --status-negative:    #ff2d4a;
    --status-negative-bg: color-mix(in srgb, #ff2d4a 15%, transparent);
  }
}

/* ==========================================================================
   2b. DARK MODE — [data-theme=dark]
   ========================================================================== */

[data-theme=dark] {
  --swh-red:           #ff2d4a;
  --swh-red-hover:     #ff5c73;
  --swh-red-light:     #3a1a20;
  --swh-orange-light:  #2d2420;
  --swh-grey-light:    #252525;
  --swh-grey-dark:     #e8e8e8;
  --swh-text:          #c8c8c8;
  --swh-text-muted:    #999999;
  --swh-border:        #404040;
  --swh-border-hover:  #606060;
  --swh-bg:            #1a1a1a;
  --swh-bg-elevated:   #222222;
  --swh-code-bg:       #2a2a2a;
  --swh-shadow:        rgba(0, 0, 0, 0.4);
  --swh-shadow-red:    rgba(255, 45, 74, 0.15);

  --pico-primary:             var(--swh-red);
  --pico-primary-hover:       var(--swh-red-hover);
  --pico-primary-focus:       rgba(255, 45, 74, 0.25);
  --pico-primary-inverse:     #ffffff;
  --pico-muted-color:         var(--swh-text-muted);
  --pico-muted-border-color:  var(--swh-border);
  --pico-accordion-open-summary-color: #c0c0c0;

  --swh-gradient: linear-gradient(90deg, #ff2d4a 0%, #ff5c3d 33%, #ffa033 66%, #ffc82e 100%);

  --status-positive:    #27a658;
  --status-positive-bg: color-mix(in srgb, #27a658 15%, transparent);
  --status-neutral:     #518fff;
  --status-neutral-bg:  color-mix(in srgb, #518fff 15%, transparent);
  --status-caution:     #ff5c3d;
  --status-caution-bg:  color-mix(in srgb, #ff5c3d 15%, transparent);
  --status-negative:    #ff2d4a;
  --status-negative-bg: color-mix(in srgb, #ff2d4a 15%, transparent);
}

/* ==========================================================================
   3. BASE ELEMENTS (works on bare HTML — org-parse, and all others)
   ========================================================================== */

body {
  font-family: var(--swh-font-family);
  color: var(--swh-text);
  background-color: var(--swh-bg);
  line-height: 1.65;
}

a {
  color: var(--swh-red);
  text-decoration: none;
  transition: color 0.15s ease;
}
a:hover { color: var(--swh-red-hover); text-decoration: underline; }
a:focus-visible { outline: 2px solid var(--swh-red); outline-offset: 2px; }

h1, h2, h3, h4, h5, h6 {
  color: var(--swh-grey-dark);
  font-weight: 600;
}

/* Tables */
table { border-collapse: collapse; width: 100%; }
th {
  background-color: var(--swh-red);
  color: #ffffff;
  font-weight: 600;
  text-align: left;
  padding: 0.75rem 1rem;
}
thead th {
  background-color: var(--swh-red) !important;
  color: #ffffff !important;
}
td {
  border: 1px solid var(--swh-border);
  padding: 0.625rem 1rem;
  color: var(--swh-text);
  background-color: var(--swh-bg-elevated);
}
tr:nth-child(even) td { background-color: var(--swh-grey-light); }
tr:hover td { background-color: var(--swh-red-light); }

/* Code */
code {
  font-family: var(--swh-font-mono);
  font-size: 0.875em;
  padding: 0.2em 0.4em;
  background-color: var(--swh-code-bg);
  border: 1px solid var(--swh-border);
  border-radius: 4px;
  color: var(--swh-text);
}
pre {
  background-color: var(--swh-code-bg);
  border: 1px solid var(--swh-border);
  border-radius: 6px;
  padding: 1rem;
  overflow-x: auto;
}
pre code {
  padding: 0;
  background: none;
  border: none;
  font-size: 0.875rem;
  color: var(--swh-grey-dark);
}

/* Images — subtle rounding and shadow */
img {
  border-radius: 3px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  margin: 1rem;
}

/* Time — subtle, no background */
time {
  color: var(--swh-text-muted);
  background: transparent;
}

/* Blockquotes — orange accent (secondary brand color) */
blockquote {
  border-left: 4px solid var(--swh-orange);
  background-color: var(--swh-orange-light);
  color: var(--swh-text);
  padding: 1rem 1.5rem;
  margin: 1rem 0;
  border-radius: 0 6px 6px 0;
}
blockquote p:last-child { margin-bottom: 0; }

/* Description lists */
dd { margin-bottom: .8rem; }

/* Buttons */
button,
[type="submit"],
[type="button"] {
  background-color: var(--swh-red);
  border-color: var(--swh-red);
  color: #ffffff;
  border-radius: 4px;
  font-weight: 500;
  transition: background-color 0.15s ease, border-color 0.15s ease,
              box-shadow 0.15s ease;
}
button:hover, [type="submit"]:hover, [type="button"]:hover {
  background-color: var(--swh-red-hover);
  border-color: var(--swh-red-hover);
}
button:focus-visible, [type="submit"]:focus-visible, [type="button"]:focus-visible {
  box-shadow: 0 0 0 3px var(--pico-primary-focus);
}
button.secondary, button.outline {
  background-color: transparent;
  border: 1px solid var(--swh-border);
  color: var(--swh-text);
}
button.secondary:hover, button.outline:hover {
  border-color: var(--swh-red);
  color: var(--swh-red);
  background-color: transparent;
}

/* Accessibility */
:focus-visible { outline: 2px solid var(--swh-red); outline-offset: 2px; }
::selection { background-color: var(--swh-red); color: #ffffff; }

/* ==========================================================================
   4. PICO CSS OVERRIDES (topics)
   ========================================================================== */

header.container {
  padding-bottom: 1.5rem;
  margin-bottom: 2rem;
  border-bottom: none;
}
header h1 { margin-bottom: 0.75rem; }
header h1 a {
  color: var(--swh-grey-dark);
  text-decoration: none;
  font-weight: 700;
  transition: color 0.15s ease;
}
header h1 a:hover { color: var(--swh-red); text-decoration: none; }
header p { color: var(--swh-text-muted); font-size: 1.1rem; margin-bottom: 0; }

/* Signature gradient bar */
header.container::after {
  content: '';
  display: block;
  height: 4px;
  margin-top: 1.5rem;
  background: var(--swh-gradient);
  border-radius: 2px;
}

/* Search */
.search-row input[type="search"] {
  border: 1px solid var(--swh-border);
  border-radius: 4px;
  background-color: var(--swh-bg-elevated);
  color: var(--swh-text);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.search-row input[type="search"]::placeholder { color: var(--swh-text-muted); }
.search-row input[type="search"]:focus {
  border-color: var(--swh-red);
  box-shadow: 0 0 0 3px var(--pico-primary-focus);
  outline: none;
}
#clear-search {
  color: var(--swh-text-muted);
  border-color: var(--swh-border);
  background-color: var(--swh-bg-elevated);
  transition: all 0.15s ease;
}
#clear-search:hover { color: var(--swh-red); border-color: var(--swh-red); }

/* Cards */
.card {
  border: 1px solid var(--swh-border);
  border-radius: 6px;
  background: var(--swh-bg-elevated);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}
.card:hover {
  border-color: var(--swh-red);
  box-shadow: 0 6px 20px var(--swh-shadow-red);
  transform: translateY(-2px);
}
.card h2 { color: var(--swh-grey-dark); font-weight: 600; transition: color 0.15s ease; }
.card:hover h2 { color: var(--swh-red); }
.card p { color: var(--swh-text-muted); }

/* Back link, view toggle */
.back-link { color: var(--swh-red); font-weight: 500; }
.back-link:hover { color: var(--swh-red-hover); }
.view-toggle { color: var(--swh-text-muted); font-size: 0.95rem; margin-bottom: 1.25rem; }
.view-toggle a { color: var(--swh-red); font-weight: 500; }
.view-toggle a:hover { color: var(--swh-red-hover); text-decoration: underline; }

/* Details/Accordion */
details {
  border: 1px solid var(--swh-border);
  border-radius: 6px;
  background-color: var(--swh-bg-elevated);
  margin-bottom: 0.75rem;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
details:hover { border-color: var(--swh-border-hover); }
details[open] { border-color: var(--swh-red); box-shadow: 0 2px 12px var(--swh-shadow-red); }
details summary {
  color: var(--swh-grey-dark);
  font-weight: 500;
  cursor: pointer;
  padding: 0.5rem 0.75rem;
  transition: color 0.15s ease;
}
details summary:hover { color: var(--swh-red); }
details[open] summary { color: var(--swh-red); border-bottom: 1px solid var(--swh-border); }
.permalink { color: var(--swh-grey); opacity: 0.5; transition: opacity 0.15s ease, color 0.15s ease; }
.permalink:hover { color: var(--swh-red) !important; opacity: 1; }
details > div, details > p, details > ul, details > ol { padding: 0.625rem 0.75rem; }
details p, details ul, details ol { color: var(--swh-text); }
details a { color: var(--swh-red); }
details a:hover { color: var(--swh-red-hover); text-decoration: underline; }
details pre, details code { background-color: var(--swh-code-bg); }
details table { margin: 0; }

/* Footer */
footer.container {
  border-top: 1px solid var(--swh-border);
  padding-top: 1.5rem;
  margin-top: 3rem;
  color: var(--swh-text-muted);
  font-size: 0.9rem;
}
footer a { color: var(--swh-red); }
footer a:hover { color: var(--swh-red-hover); }

/* ==========================================================================
   5. TREES-SPECIFIC COMPONENTS
   ========================================================================== */

#app > header {
  background: var(--swh-grey-light);
  border-bottom: none;
}
#app > header::after {
  content: '';
  display: block;
  height: 4px;
  background: var(--swh-gradient);
  border-radius: 2px;
}
#app > header h1 { color: var(--swh-grey-dark); font-weight: 700; }
#app > header h2 { color: var(--swh-text-muted); }
#app > footer {
  background: var(--swh-grey-light);
  border-top: 1px solid var(--swh-border);
  color: var(--swh-text-muted);
}

progress::-webkit-progress-bar { background: var(--swh-border); }
progress::-webkit-progress-value { background: var(--swh-red); }
progress::-moz-progress-bar { background: var(--swh-red); }

.trees button.pure-button,
.trees button.button {
  border: 1px solid var(--swh-border);
  border-radius: 6px;
  background: var(--swh-bg-elevated);
  color: var(--swh-text);
  font-weight: 500;
  padding: 1rem 1.25rem;
  line-height: 1.5;
  transition: border-color 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
}
.trees button.pure-button:hover,
.trees button.button:hover {
  border-color: var(--swh-red);
  background: var(--swh-red-light);
  box-shadow: 0 2px 8px var(--swh-shadow-red);
}
.trees button.pure-button:focus,
.trees button.button:focus { outline: 2px solid var(--swh-red); outline-offset: 2px; }

.trees button.pure-button.status-positive,
.trees button.button.status-positive { border-color: var(--status-positive); }
.trees button.pure-button.status-positive:hover,
.trees button.button.status-positive:hover { background: var(--status-positive-bg) !important; }

.trees button.pure-button.status-neutral,
.trees button.button.status-neutral { border-color: var(--status-neutral); }
.trees button.pure-button.status-neutral:hover,
.trees button.button.status-neutral:hover { background: var(--status-neutral-bg) !important; }

.trees button.pure-button.status-caution,
.trees button.button.status-caution { border-color: var(--status-caution); }
.trees button.pure-button.status-caution:hover,
.trees button.button.status-caution:hover { background: var(--status-caution-bg) !important; }

.trees button.pure-button.status-negative,
.trees button.button.status-negative { border-color: var(--status-negative); }
.trees button.pure-button.status-negative:hover,
.trees button.button.status-negative:hover { background: var(--status-negative-bg) !important; }

aside.help {
  background: var(--swh-orange-light);
  border-left: 4px solid var(--swh-orange);
  border-radius: 0 6px 6px 0;
  color: var(--swh-text);
  padding: 1rem 1.5rem;
}

.summary article {
  background: var(--swh-grey-light);
  border-left: 3px solid var(--swh-red);
  border-radius: 6px;
  color: var(--swh-text);
}

.score-result { border-radius: 6px; }

nav a { font-variant: small-caps; }
nav.actions a:hover { background: var(--swh-red-light); border-radius: 4px; }

/* ==========================================================================
   6. org-parse SPECIFIC OVERRIDES
   ========================================================================== */

header .document-title { border-color: var(--swh-red); }
.subtitle { color: var(--swh-text-muted); }
.todo { color: var(--swh-red); }
.done { color: #18753c; }
.priority { color: var(--swh-light-orange); }
.tags { color: var(--swh-text-muted); }
.footnotes { border-top-color: var(--swh-border); }
.planning { color: var(--swh-text-muted); }
.warning { background: var(--swh-orange-light); border-left-color: var(--swh-orange); color: var(--swh-text); }
.note { background: #e8edff; border-left-color: #0063cb; color: var(--swh-text); }
figure { width: fit-content; margin-block: calc(var(--pico-typography-spacing-vertical, 1rem) + 0.4rem); }
figure > img { display: block; margin-bottom: 0.25rem; }
figure figcaption { color: var(--swh-text-muted); font-size: 0.875em; padding: 0; }
figure.align-center { margin-left: auto; margin-right: auto; }
figure.align-center > img { margin-left: auto; margin-right: auto; }
figure.align-center > figcaption { text-align: center; }
figure.align-right { margin-left: auto; margin-right: 0; }
figure.align-right > img { margin-left: auto; margin-right: 0; }
figure.align-right > figcaption { text-align: right; }
figure.align-left { margin-left: 0; margin-right: auto; }
figure.align-left > img { margin-left: 0; margin-right: auto; }
figure.align-left > figcaption { text-align: left; }

/* ==========================================================================
   7. SCROLLBARS, PRINT, REDUCED MOTION
   ========================================================================== */

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--swh-grey-light); }
::-webkit-scrollbar-thumb { background: var(--swh-text-muted); border-radius: 5px; border: 2px solid var(--swh-grey-light); }
::-webkit-scrollbar-thumb:hover { background: var(--swh-grey); }
* { scrollbar-width: thin; scrollbar-color: var(--swh-text-muted) var(--swh-grey-light); }

/* Utility classes */
.swh-gradient-text { background: var(--swh-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.swh-gradient-border { border: none; background: var(--swh-gradient); padding: 2px; border-radius: 6px; }
.swh-gradient-border > * { background: var(--swh-bg-elevated); border-radius: 4px; }

@media print {
  :root { --swh-text: #000000; --swh-grey-dark: #000000; --swh-bg: #ffffff; --swh-bg-elevated: #ffffff; }
  header.container::after { background: #e20026; -webkit-print-color-adjust: exact; print-color-adjust: exact; }
  a { color: #000000; text-decoration: underline; }
  a[href]::after { content: " (" attr(href) ")"; font-size: 0.8em; color: #666666; }
  details { border: 1px solid #cccccc; }
  details[open] { box-shadow: none; }
  .card:hover { transform: none; box-shadow: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .card:hover { transform: none; }
}