:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --text: #1a1d21;
  --muted: #6b7280;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --danger: #ef4444;
  --border: #e5e7eb;
  --radius: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --panel: #171a20;
    --text: #e5e7eb;
    --muted: #9ca3af;
    --accent: #60a5fa;
    --accent-hover: #3b82f6;
    --danger: #f87171;
    --border: #2a2f3a;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
}

.muted {
  color: var(--muted);
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.center-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.auth-card {
  width: 100%;
  max-width: 380px;
}

.auth-card h1 {
  margin: 0 0 8px;
  font-size: 22px;
}

.auth-card p {
  margin: 0 0 20px;
  font-size: 13px;
}

.field {
  display: block;
  margin-bottom: 14px;
}

.field span {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 4px;
}

input {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}

input:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
}

button {
  font: inherit;
  cursor: pointer;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  padding: 9px 14px;
}

button:hover {
  border-color: var(--muted);
}

button:disabled {
  opacity: 0.6;
  cursor: default;
}

.btn-primary {
  width: 100%;
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}

.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

.error {
  color: var(--danger);
  font-size: 13px;
  min-height: 18px;
  margin: 0 0 10px;
}

/* layout (signed-in) */

.layout {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}

.brand {
  font-weight: 700;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.user-badge {
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--muted);
}

.content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 40px 16px;
}

.welcome-card {
  width: 100%;
  max-width: 640px;
}

.welcome-card h1 {
  margin: 0 0 8px;
  font-size: 22px;
}

.welcome-card p {
  margin: 0 0 16px;
  font-size: 14px;
}

.section-title {
  font-size: 15px;
  margin: 0 0 4px;
}

.roots {
  list-style: none;
  margin: 0;
  padding: 0;
}

.roots li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-top: 1px solid var(--border);
}

.roots .root-name {
  font-weight: 600;
}

.roots .muted {
  font-size: 13px;
  flex: 1;
}