:root {
  --bg: #f4f6f8;
  --card-bg: #ffffff;
  --border: #dfe3e8;
  --text: #1f2933;
  --text-muted: #5f6b76;
  --primary: #d32f2f;
  --primary-hover: #b71c1c;
  --error: #c62828;
  --success: #2e7d32;
}

* {
  box-sizing: border-box;
}

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

/* Login page */
.login-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 2.5rem;
  width: 100%;
  max-width: 380px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.login-card h1 {
  font-size: 1.4rem;
  margin: 0 0 0.25rem;
}

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

#login-form label {
  display: block;
  font-size: 0.85rem;
  margin: 0.9rem 0 0.3rem;
  color: var(--text-muted);
}

#login-form input {
  width: 100%;
  padding: 0.6rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.95rem;
}

#login-form button {
  margin-top: 1.5rem;
}

.error-text {
  color: var(--error);
  font-size: 0.85rem;
  margin-top: 0.75rem;
}

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

.topbar h1 {
  font-size: 1.2rem;
  margin: 0;
}

.content {
  max-width: 900px;
  margin: 2rem auto;
  padding: 0 1.5rem;
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.card h2 {
  margin: 0 0 0.4rem;
  font-size: 1.1rem;
}

.card-desc {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin: 0 0 1.2rem;
}

.field-row {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.2rem;
  flex-wrap: wrap;
}

.field {
  flex: 1;
  min-width: 140px;
}

.field label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.3rem;
}

.field input {
  width: 100%;
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.9rem;
}

button {
  cursor: pointer;
  font-size: 0.95rem;
  border: none;
  border-radius: 6px;
  padding: 0.65rem 1.2rem;
}

.btn-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.btn-row .btn-primary,
.btn-row .btn-secondary {
  flex: 1;
  min-width: 160px;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  width: 100%;
}

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

.btn-secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

.btn-secondary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-secondary:hover {
  background: var(--bg);
}

.status-text {
  margin: 0.8rem 0 0;
  font-size: 0.85rem;
  color: var(--success);
  min-height: 1.2em;
}

.status-text.error-text {
  color: var(--error);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14181c;
    --card-bg: #1e242a;
    --border: #313a42;
    --text: #e5e9ec;
    --text-muted: #9aa5ad;
  }
}