/* === Reset & Base === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg-primary: #1a1d23;
  --bg-secondary: #22262e;
  --bg-card: #2a2f38;
  --bg-sidebar: #15181e;
  --text-primary: #e4e7eb;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --success: #10b981;
  --error: #ef4444;
  --info: #3b82f6;
  --warning: #f59e0b;
  --border: #374151;
  --radius: 8px;
}

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-primary);
  background: var(--bg-primary);
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

/* === Login Page === */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: var(--bg-primary);
}

.login-card {
  width: 100%;
  max-width: 380px;
  padding: 40px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.login-title {
  font-size: 24px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 4px;
}

.login-subtitle {
  font-size: 13px;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 24px;
}

/* === Forms === */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="email"],
.form-group select {
  width: 100%;
  padding: 10px 12px;
  font-size: 14px;
  color: var(--text-primary);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  outline: none;
  transition: border-color 0.15s;
}

.form-group input:focus {
  border-color: var(--accent);
}

/* === Buttons === */
.btn {
  display: inline-block;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  text-align: center;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s;
}

.btn-primary {
  color: #fff;
  background: var(--accent);
}
.btn-primary:hover {
  background: var(--accent-hover);
  text-decoration: none;
}

.btn-block {
  display: block;
  width: 100%;
}

.link-button {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font-size: 14px;
  padding: 0;
  font-family: inherit;
}
.link-button:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

/* === Sidebar === */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 220px;
  height: 100vh;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 10;
}

.sidebar-header {
  padding: 20px 16px 16px;
  border-bottom: 1px solid var(--border);
}

.sidebar-brand {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

.sidebar-version {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 2px;
}

.sidebar-nav {
  list-style: none;
  padding: 8px 0;
  flex: 1;
}

.sidebar-nav li a,
.sidebar-nav li form {
  display: block;
  padding: 10px 16px;
  font-size: 14px;
  color: var(--text-secondary);
  transition: background 0.15s, color 0.15s;
}

.sidebar-nav li a:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
  text-decoration: none;
}

.sidebar-nav li form {
  padding: 0;
}

.sidebar-nav li form .link-button {
  display: block;
  width: 100%;
  padding: 10px 16px;
  text-align: left;
  color: var(--text-secondary);
}

.sidebar-nav li form .link-button:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
  text-decoration: none;
}

.sidebar-footer {
  border-top: 1px solid var(--border);
  padding: 12px 0;
}

.sidebar-user {
  padding: 0 16px 8px;
}

.user-name {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
}

.user-role {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
  text-transform: capitalize;
}

/* === Main Content === */
.main-content {
  margin-left: 220px;
  padding: 32px;
  min-height: 100vh;
}

.main-content h1 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 24px;
}

.main-content h2 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
}

.main-content h3 {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

/* === Dashboard Sections === */
.dashboard-section {
  margin-bottom: 40px;
}

/* === Card Grid === */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

@media (max-width: 900px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .card-grid {
    grid-template-columns: 1fr;
  }
}

/* === Cards === */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.card h3 {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.card-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.card-value.placeholder {
  font-size: 22px;
  color: var(--text-muted);
  font-weight: 400;
}

.card-meta {
  font-size: 12px;
  color: var(--text-muted);
}

.card-updated {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 8px;
}

.card-disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* === Status Badges === */
.status-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 13px;
  font-weight: 600;
}

.status-ok {
  background: rgba(16, 185, 129, 0.15);
  color: var(--success);
}

.status-degraded {
  background: rgba(239, 68, 68, 0.15);
  color: var(--error);
}

/* === Flash Messages === */
.flash {
  padding: 12px 16px;
  border-radius: 6px;
  margin-bottom: 16px;
  font-size: 13px;
  font-weight: 500;
  border: 1px solid transparent;
}

.flash-success {
  color: var(--success);
  background: rgba(16, 185, 129, 0.1);
  border-color: rgba(16, 185, 129, 0.2);
}

.flash-error {
  color: var(--error);
  background: rgba(239, 68, 68, 0.1);
  border-color: rgba(239, 68, 68, 0.2);
}

.flash-info {
  color: var(--info);
  background: rgba(59, 130, 246, 0.1);
  border-color: rgba(59, 130, 246, 0.2);
}

/* === Error Page === */
.error-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.error-card {
  text-align: center;
  max-width: 400px;
}

.error-code {
  font-size: 64px;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 8px;
}

.error-message {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* === Detail List (profile) === */
.detail-list {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 8px 16px;
}

.detail-list dt {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.detail-list dd {
  font-size: 14px;
  color: var(--text-primary);
  word-break: break-all;
}