:root {
  color-scheme: light;
  --shell-color-bg: #f8fafc;
  --shell-color-panel: #ffffff;
  --shell-color-panel-elevated: #f1f5f9;
  --shell-color-text: #0b1326;
  --shell-color-text-muted: #334155;
  --shell-color-border: #dbe5ef;
  --shell-color-accent: #0ea5e9;
  --shell-color-accent-strong: #0284c7;
  --shell-button-primary-bg: #0369a1;
  --shell-button-primary-text: #f8fafc;
  --shell-color-focus-ring: #0ea5e9;
  --shell-color-focus-shadow: rgba(14, 165, 233, 0.28);
  --shell-color-surface-soft: rgba(255, 255, 255, 0.78);
  --shell-color-surface-strong: #ffffff;
  --shell-color-overlay: rgba(248, 250, 252, 0.92);
  --shell-topbar-border-color: rgba(219, 229, 239, 0.9);
  --shell-max-width: 1060px;
  --shell-topbar-padding: 12px 18px;
  --shell-topbar-gap: 16px;
  --shell-topbar-z: 12;
  --shell-space-1: 4px;
  --shell-space-2: 8px;
  --shell-space-3: 12px;
  --shell-space-4: 16px;
  --shell-space-5: 20px;
  --shell-space-6: 24px;
  --shell-radius-sm: 0;
  --shell-radius-md: 0;
  --shell-radius-lg: 0;
}

:root[data-theme="dark"],
[data-theme="dark"] {
  color-scheme: dark;
  --shell-color-bg: #0a0a0a;
  --shell-color-panel: #121212;
  --shell-color-panel-elevated: #1a1a1a;
  --shell-color-text: #e6e6e6;
  --shell-color-text-muted: #a3a3a3;
  --shell-color-border: #2b2b2b;
  --shell-color-accent: #d4d4d4;
  --shell-color-accent-strong: #f0f0f0;
  --shell-button-primary-bg: #e5e5e5;
  --shell-button-primary-text: #111111;
  --shell-color-focus-ring: #d4d4d4;
  --shell-color-focus-shadow: rgba(212, 212, 212, 0.32);
  --shell-color-surface-soft: rgba(22, 22, 22, 0.78);
  --shell-color-surface-strong: rgba(18, 18, 18, 0.9);
  --shell-color-overlay: rgba(10, 10, 10, 0.82);
  --shell-topbar-border-color: rgba(43, 43, 43, 0.84);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[role="button"]:focus-visible {
  outline: 2px solid var(--shell-color-focus-ring);
  outline-offset: 2px;
  box-shadow: 0 0 0 3px var(--shell-color-focus-shadow);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: var(--shell-topbar-z, 12);
  background: var(--shell-topbar-bg, var(--shell-color-overlay));
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--shell-topbar-border, var(--shell-topbar-border-color));
}

.topbar-inner {
  max-width: var(--shell-max-width, 1200px);
  margin: 0 auto;
  padding: var(--shell-topbar-padding, 12px 18px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--shell-topbar-gap, 16px);
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.brand-logo {
  width: 34px;
  height: 34px;
  border-radius: 0;
  border: 1px solid var(--shell-brand-border, color-mix(in srgb, var(--shell-color-accent) 28%, transparent));
  background: var(--shell-brand-bg, color-mix(in srgb, var(--shell-color-accent) 12%, var(--shell-color-panel)));
  display: grid;
  place-items: center;
  overflow: hidden;
  flex: 0 0 auto;
}

.brand-logo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.brand-name {
  font-weight: 850;
  letter-spacing: -0.02em;
  font-size: 18px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.topnav,
.nav {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 0;
  border: 1px solid var(--shell-nav-border, var(--border));
  background: var(--shell-color-surface-soft);
  color: var(--shell-nav-text, var(--text));
  font-size: 12px;
  font-weight: 700;
  padding: 8px 10px;
  cursor: pointer;
}

.theme-toggle:hover {
  background: var(--shell-nav-hover-bg, var(--shell-color-panel-elevated));
}

.topnav a,
.nav a {
  color: var(--shell-nav-muted, var(--muted));
  font-size: 13px;
  font-weight: 700;
  padding: 8px 10px;
  border-radius: 0;
  border: 1px solid transparent;
  text-decoration: none;
}

.topnav a:hover,
.nav a:hover {
  color: var(--shell-nav-text, var(--text));
  border-color: var(--shell-nav-border, var(--border));
  background: var(--shell-nav-hover-bg, var(--shell-color-panel-elevated));
}

.topnav a.active,
.nav a.active {
  color: var(--shell-nav-text, var(--text));
  border-color: var(--shell-nav-border, var(--border));
  background: var(--shell-nav-active-bg, color-mix(in srgb, var(--shell-color-accent) 14%, transparent));
}

.app-main {
  max-width: var(--shell-max-width, 1200px);
  margin: var(--shell-space-6) auto 0;
  padding: 0 var(--shell-space-5) 64px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: var(--shell-space-5);
}

.context-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--shell-space-3);
  flex-wrap: wrap;
  padding: 12px 14px;
  border-radius: 0;
  border: 1px solid var(--shell-nav-border, var(--border));
  background: var(--shell-context-bg, var(--shell-color-surface-soft));
}

.context-strip small {
  color: var(--shell-nav-muted, var(--muted));
}

.shell-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 0;
  padding: var(--shell-space-5);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 0;
  border: 1px solid var(--border);
  color: var(--text);
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
}

.btn-primary {
  background: var(--shell-button-primary-bg, var(--accent-strong, #0ea5e9));
  border-color: transparent;
  color: var(--shell-button-primary-text, #f8fafc);
}

.btn-secondary {
  background: var(--shell-color-surface-soft);
}

.btn-ghost {
  background: transparent;
}

.btn-danger {
  background: rgba(220, 38, 38, 0.14);
  border-color: rgba(248, 113, 113, 0.45);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 0;
  border: 1px solid var(--border);
  font-size: 12px;
  font-weight: 700;
}

.status-badge.is-running { background: rgba(56, 189, 248, 0.12); border-color: rgba(56, 189, 248, 0.35); }
.status-badge.is-success { background: rgba(34, 197, 94, 0.12); border-color: rgba(34, 197, 94, 0.35); }
.status-badge.is-fail { background: rgba(248, 113, 113, 0.12); border-color: rgba(248, 113, 113, 0.35); }
.status-badge.is-review { background: rgba(250, 204, 21, 0.12); border-color: rgba(250, 204, 21, 0.4); }


@media (max-width: 720px) {
  .topbar-inner {
    padding: 10px 12px;
    gap: 10px;
  }

  .app-main {
    margin-top: var(--shell-space-4);
    padding: 0 var(--shell-space-3) 52px;
    grid-template-columns: 1fr;
    gap: var(--shell-space-4);
  }

  .shell-card {
    padding: var(--shell-space-4);
  }
}