:root {
  color-scheme: light;
  --ca-bg: #f4f7fb;
  --ca-panel: #ffffff;
  --ca-panel-soft: #f8fafc;
  --ca-border: #d0d7e2;
  --ca-text: #0f172a;
  --ca-header: #0f172a;
  --ca-muted: #64748b;
  --ca-brand: #0284c7;
  --ca-hover: #f1f5f9;
  --ca-accent-soft: rgba(2, 132, 199, 0.12);
  --ca-ring: rgba(14, 165, 233, 0.35);
  --ca-danger-bg: #fef2f2;
  --ca-danger-border: #fecaca;
  --ca-danger-text: #991b1b;
  --ca-info-bg: #f0f9ff;
  --ca-info-border: #bae6fd;
  --ca-info-text: #0c4a6e;
  --ca-shadow: 0 18px 50px rgba(15, 23, 42, 0.08);
  font-family: "Segoe UI", sans-serif;
}

html.dark {
  color-scheme: dark;
  --ca-bg: #0b1220;
  --ca-panel: #111827;
  --ca-panel-soft: #0f172a;
  --ca-border: #1e293b;
  --ca-text: #e2e8f0;
  --ca-header: #f8fafc;
  --ca-muted: #94a3b8;
  --ca-hover: #1e293b;
  --ca-accent-soft: rgba(2, 132, 199, 0.2);
  --ca-danger-bg: #3f1d1d;
  --ca-danger-border: #7f1d1d;
  --ca-danger-text: #fecaca;
  --ca-info-bg: #0c2a3a;
  --ca-info-border: #075985;
  --ca-info-text: #e0f2fe;
  --ca-shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
}

[hidden] { display: none !important; }

body {
  margin: 0;
  font: 16px/1.45 "Segoe UI", sans-serif;
  color: var(--ca-text);
  background: var(--ca-bg);
}

a { color: var(--ca-brand); }

button, .btn-primary, .button {
  background: var(--ca-brand);
  color: #fff;
  border: 0;
  border-radius: 8px;
  padding: 0.7rem 1rem;
  font: inherit;
  cursor: pointer;
}

.btn-ghost, button.btn-ghost {
  background: var(--ca-panel);
  color: var(--ca-text);
  border: 1px solid var(--ca-border);
}

input, select {
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--ca-border);
  border-radius: 8px;
  background: var(--ca-panel);
  color: var(--ca-text);
  font: inherit;
}

.muted { color: var(--ca-muted); }
.card {
  background: var(--ca-panel);
  border: 1px solid var(--ca-border);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 16px;
}
.demo { background: #fef3c7; color: #78350f; padding: 8px 24px; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 8px; border-bottom: 1px solid var(--ca-border); }
.opened { display: inline-block; width: 1rem; height: 1rem; border-radius: 999px; background: #15803d; color: #fff; text-align: center; line-height: 1rem; font-size: 12px; }

.ca-topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 20px;
  background: var(--ca-panel);
  border-bottom: 1px solid var(--ca-border);
  position: sticky;
  top: 0;
  z-index: 20;
}
.ca-brand-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: inherit;
  text-decoration: none;
  flex: 0 0 auto;
}
.ca-mark, .login-mark { border-radius: 12px; display: block; }
.brand-word { font-size: 1.35rem; letter-spacing: -0.02em; color: var(--ca-header); }
.brand-cor { font-weight: 400; }
.brand-suffix { font-weight: 700; }
.ca-primary-nav { display: flex; gap: 14px; flex: 1 1 auto; align-items: center; }
.ca-primary-nav a { color: var(--ca-brand); text-decoration: none; font-weight: 600; }
.ca-header-right, .ca-menubar-actions {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: 0.45rem;
  margin-left: auto;
}
.header-icon-btn, .theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  border-radius: 999px;
  border: 1px solid var(--ca-border);
  background: var(--ca-panel);
  color: var(--ca-muted);
  text-decoration: none;
  cursor: pointer;
  line-height: 0;
}
.header-icon-btn:hover, .theme-toggle:hover, .settings-gear.active {
  color: var(--ca-brand);
  background: var(--ca-hover);
}
.header-icon-svg, .theme-icon { width: 18px; height: 18px; display: block; }
.header-logout-form { display: inline-flex; margin: 0; }
.help-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.28rem 0.65rem 0.28rem 0.35rem;
  border-radius: 999px;
  border: 1px solid var(--ca-border);
  background: var(--ca-panel-soft);
  color: var(--ca-brand);
  text-decoration: none;
  font-weight: 600;
}
.help-btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 50%;
  background: var(--ca-brand);
  color: #fff;
}
.ca-nav-toggle { display: none !important; }
main { padding: 24px; max-width: 1080px; }
.site-footer { padding: 16px 24px; }
.site-footer a { margin-right: 12px; }

.login-body { min-height: 100vh; }
.login-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(900px 420px at 50% -10%, rgba(2, 132, 199, 0.16), transparent 60%),
    var(--ca-bg);
  position: relative;
  padding: 24px;
}
.login-theme-toggle { position: absolute; top: 1rem; right: 1rem; z-index: 2; }
.login-card {
  width: min(440px, 100%);
  background: var(--ca-panel);
  border: 1px solid var(--ca-border);
  border-radius: 18px;
  box-shadow: var(--ca-shadow);
  padding: 2rem 1.75rem 1.5rem;
}
.brand-row { display: flex; justify-content: center; }
.brand-row-inline, .login-brand { display: flex; align-items: center; gap: 14px; }
.brand-word-login { font-size: 2rem; }
.tagline {
  margin: 0.35rem 0 1.25rem;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  color: var(--ca-muted);
}
.form-field { display: flex; flex-direction: column; gap: 0.35rem; margin-bottom: 0.9rem; }
.form-field label { font-size: 0.85rem; font-weight: 600; }
.form-field input, .stack-form input, .stack-form select, .settings-search-input { width: 100%; box-sizing: border-box; }
.btn-block { width: 100%; margin-top: 0.25rem; }
.alert-error {
  border: 1px solid var(--ca-danger-border);
  background: var(--ca-danger-bg);
  color: var(--ca-danger-text);
  border-radius: 10px;
  padding: 0.75rem 0.85rem;
  margin-bottom: 0.85rem;
}
.login-info, .settings-note {
  border: 1px solid var(--ca-info-border);
  background: var(--ca-info-bg);
  color: var(--ca-info-text);
  border-radius: 10px;
  padding: 0.75rem 0.85rem;
}
.corauth-panel { display: none; margin-bottom: 0.85rem; }
.corauth-panel.show { display: block; }
.login-help { margin: 1rem 0 0; color: var(--ca-muted); font-size: 0.85rem; text-align: center; }

.page-header h1 { margin: 0 0 1rem; color: var(--ca-header); }
.settings-search-bar { margin-bottom: 1rem; }
.settings-search-row { display: flex; }
.search-hint { display: block; margin-top: 0.35rem; font-size: 0.78rem; }
.settings-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.settings-card {
  display: block;
  background: var(--ca-panel);
  border: 1px solid var(--ca-border);
  border-radius: 14px;
  padding: 1rem;
  text-decoration: none;
  color: inherit;
  min-height: 132px;
}
.settings-card:hover, .settings-card.active {
  border-color: var(--ca-brand);
  background: var(--ca-accent-soft);
}
.settings-card h2 { margin: 0 0 0.4rem; font-size: 1rem; color: var(--ca-header); }
.settings-card p { margin: 0; color: var(--ca-muted); font-size: 0.9rem; }
.settings-card-open { margin-top: 0.75rem; color: var(--ca-brand); font-weight: 700; font-size: 0.85rem; }
.settings-section { display: none; }
.settings-section.active { display: block; }
.stack-form { display: flex; flex-direction: column; gap: 0.45rem; max-width: 420px; margin-top: 1rem; }
.flag-row { display: flex; gap: 12px; align-items: center; margin: 0 0 8px; }

@media (max-width: 900px) {
  .ca-nav-toggle { display: inline-flex !important; }
  .ca-primary-nav {
    display: none;
    position: absolute;
    top: 64px;
    right: 12px;
    left: auto;
    flex-direction: column;
    align-items: flex-start;
    background: var(--ca-panel);
    border: 1px solid var(--ca-border);
    border-radius: 12px;
    padding: 12px;
    min-width: 180px;
    box-shadow: var(--ca-shadow);
  }
  .ca-primary-nav.open { display: flex; }
  .ca-topbar { flex-wrap: wrap; }
}
@media (max-width: 720px) {
  .help-btn-label { display: none; }
  .help-btn { padding: 0.28rem; }
}