/* Design tokens, base reset, and the app-shell components (header/nav,
   card container) shared by every page under public/. Single source —
   do not redeclare these in a page's own <style> block. */

:root {
  color-scheme: dark light;
  --page:        #f9f9f7;
  --surface-1:   #fcfcfb;
  --text-primary:#0b0b0b;
  --text-secondary:#52514e;
  --text-muted:  #898781;
  --grid:        #e1e0d9;
  --baseline:    #c3c2b7;
  --border:      rgba(11,11,11,0.10);
  --danger:      #c0392b;
  --warning:     #b45309;
  --ok-bg:       #e7f5ee;
  --ok-fg:       #1a7a4c;
  --code-bg:     #f0efe9;
  --accent:      #2a78d6;
  --series-1:    var(--accent); /* Anthropic — same blue as the UI accent, by design */
  --series-2:    #eb6834;       /* OpenAI */
  --series-3:    #1baf7a;       /* Google */
}
@media (prefers-color-scheme: dark) {
  :root {
    --page:        #0d0d0d;
    --surface-1:   #1a1a19;
    --text-primary:#ffffff;
    --text-secondary:#c3c2b7;
    --text-muted:  #898781;
    --grid:        #2c2c2a;
    --baseline:    #383835;
    --border:      rgba(255,255,255,0.10);
    --danger:      #e0655a;
    --warning:     #f0b429;
    --ok-bg:       #113325;
    --ok-fg:       #4fd18f;
    --code-bg:     #161615;
    --accent:      #3987e5;
    --series-1:    var(--accent);
    --series-2:    #d95926;
    --series-3:    #199e70;
  }
}

* { box-sizing: border-box; }
html { background: var(--page); }
body {
  margin: 0;
  background: var(--page);
  color: var(--text-primary);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}
a { color: inherit; }

.message { color: var(--text-secondary); font-size: 14px; padding: 24px 0; }
.subtitle { color: var(--text-secondary); font-size: 13px; margin: 0 0 24px; }

.card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 20px;
}

main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px 20px 48px;
}

/* Header/nav — markup is rendered by /header.js into an empty
   <header id="app-header"></header>; #app-header's fixed height is
   reserved here so that render doesn't cause a layout jump. */
#app-header {
  border-bottom: 1px solid var(--border);
  height: 57px;
}
.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 20px;
  height: 56px;
  display: flex;
  align-items: center;
  gap: 28px;
}
.wordmark {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  flex: none;
  letter-spacing: -0.01em;
}
.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-secondary);
  flex: none;
  visibility: hidden;
}
.header-right button {
  font: inherit;
  font-size: 12px;
  color: var(--text-secondary);
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  cursor: pointer;
}
.header-right button:hover { color: var(--text-primary); }
nav.tabs {
  display: flex;
  gap: 16px;
  font-size: 13px;
  flex: 1;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: none;
}
nav.tabs::-webkit-scrollbar { display: none; }
nav.tabs a {
  color: var(--text-secondary);
  text-decoration: none;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}
nav.tabs a:hover { color: var(--text-primary); }
nav.tabs a.active {
  color: var(--text-primary);
  border-bottom-color: var(--accent);
  font-weight: 600;
}
@media (max-width: 700px) {
  .header-inner { padding: 0 14px; gap: 14px; }
  #user-email { display: none; }
}