:root {
  color-scheme: light dark;
  --bg: #f4f5f7;
  --surface: #ffffff;
  --text: #1a1d23;
  --muted: #6b7280;
  --border: #e2e4e9;
  --accent: #2563eb;
  --accent-text: #ffffff;
  --danger: #b91c1c;
  --danger-bg: #fef2f2;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --surface: #1e2126;
    --text: #e8e9ec;
    --muted: #9aa1ac;
    --border: #2c3038;
    --accent: #3b82f6;
    --accent-text: #ffffff;
    --danger: #f87171;
    --danger-bg: #3a1414;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

#app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.center-screen {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  width: 100%;
  max-width: 360px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.card h1 {
  font-size: 1.25rem;
  margin: 0 0 0.25rem;
}

.card p.subtitle {
  color: var(--muted);
  margin: 0 0 1.5rem;
  font-size: 0.9rem;
}

label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
  margin-top: 1rem;
}

input[type="text"],
input[type="password"] {
  width: 100%;
  padding: 0.6rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
}

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

button {
  cursor: pointer;
  font-size: 1rem;
  border-radius: 8px;
  border: none;
}

.btn-primary {
  width: 100%;
  margin-top: 1.5rem;
  padding: 0.65rem;
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: default;
}

.btn-link {
  background: none;
  color: var(--muted);
  font-size: 0.85rem;
  padding: 0.25rem;
}

.error-box {
  background: var(--danger-bg);
  color: var(--danger);
  border-radius: 8px;
  padding: 0.6rem 0.8rem;
  font-size: 0.85rem;
  margin-top: 1rem;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.topbar h1 {
  font-size: 1.1rem;
  margin: 0;
}

.topbar .meta {
  color: var(--muted);
  font-size: 0.8rem;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

main {
  flex: 1;
  padding: 1.5rem;
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
}

section + section {
  margin-top: 2rem;
}

section h2 {
  font-size: 1rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.75rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}

th, td {
  text-align: left;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
}

th {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
}

tr:last-child td {
  border-bottom: none;
}

.empty-state {
  color: var(--muted);
  padding: 2rem;
  text-align: center;
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: 10px;
}

.badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--bg);
  color: var(--muted);
}