/* ============================================
   PingBase Dashboard — Styles
   No framework. System fonts. Ship it.
   ============================================ */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-bg: #F8FAFC;
  --color-surface: #FFFFFF;
  --color-header: #1E293B;
  --color-header-text: #F1F5F9;
  --color-text: #1E293B;
  --color-text-muted: #64748B;
  --color-border: #E2E8F0;
  --color-up: #10B981;
  --color-down: #EF4444;
  --color-degraded: #F59E0B;
  --color-unknown: #94A3B8;
  --color-primary: #3B82F6;
  --color-primary-hover: #2563EB;
  --color-danger: #EF4444;
  --color-danger-hover: #DC2626;
  --radius: 8px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
}

html {
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  min-height: 100vh;
}

/* ---- Login ---- */

.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-container {
  width: 100%;
  max-width: 400px;
  padding: 1rem;
}

.login-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 2.5rem 2rem;
  text-align: center;
}

.login-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 0.25rem;
}

.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  font-size: 1.125rem;
  border-radius: 8px;
}

.login-logo h1 {
  font-size: 1.5rem;
  font-weight: 700;
}

.login-subtitle {
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
  font-size: 0.9375rem;
}

.login-card label {
  display: block;
  text-align: left;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.375rem;
}

.login-note {
  margin-top: 1rem;
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* ---- Form elements ---- */

input[type="text"],
input[type="email"],
input[type="url"],
input[type="number"],
select {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-family: inherit;
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color 0.15s;
}

input:focus, select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
}

/* ---- Buttons ---- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  font-family: inherit;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s;
}

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

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

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
}

.btn-danger {
  background: var(--color-danger);
  color: #fff;
}

.btn-danger:hover:not(:disabled) {
  background: var(--color-danger-hover);
}

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

.btn-secondary:hover:not(:disabled) {
  background: var(--color-border);
}

.btn-full {
  width: 100%;
  margin-top: 0.75rem;
  padding: 0.625rem 1rem;
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
}

/* ---- Header ---- */

.app-header {
  background: var(--color-header);
  color: var(--color-header-text);
  padding: 0 1.5rem;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.header-left h1 {
  font-size: 1.125rem;
  font-weight: 600;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.875rem;
}

.header-user {
  color: var(--color-text-muted);
}

.header-logout {
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  font-size: 0.8125rem;
  font-family: inherit;
  text-decoration: underline;
}

.header-logout:hover {
  color: #fff;
}

/* ---- Main layout ---- */

.app-main {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.5rem;
}

/* ---- Toolbar ---- */

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.toolbar h2 {
  font-size: 1.25rem;
  font-weight: 600;
}

/* ---- Monitor list ---- */

.monitor-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.monitor-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  cursor: pointer;
  transition: box-shadow 0.15s, border-color 0.15s;
}

.monitor-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

.status-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}

.status-dot.up { background: var(--color-up); }
.status-dot.down { background: var(--color-down); }
.status-dot.degraded { background: var(--color-degraded); }
.status-dot.unknown { background: var(--color-unknown); }

.monitor-info {
  flex: 1;
  min-width: 0;
}

.monitor-name {
  font-weight: 600;
  font-size: 0.9375rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.monitor-url {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.monitor-meta {
  text-align: right;
  flex-shrink: 0;
}

.monitor-response-time {
  font-size: 0.875rem;
  font-weight: 600;
}

.monitor-last-check {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.status-badge {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

.status-badge.up { background: #D1FAE5; color: #065F46; }
.status-badge.down { background: #FEE2E2; color: #991B1B; }
.status-badge.degraded { background: #FEF3C7; color: #92400E; }
.status-badge.unknown { background: #F1F5F9; color: #475569; }

/* ---- Empty state ---- */

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--color-text-muted);
}

.empty-state p {
  margin-bottom: 1rem;
}

/* ---- Modal ---- */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal-overlay.hidden {
  display: none;
}

.modal {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  width: 100%;
  max-width: 480px;
  margin: 1rem;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
}

.modal-header h3 {
  font-size: 1.0625rem;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
  color: var(--color-text-muted);
  line-height: 1;
}

.modal-body {
  padding: 1.25rem;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--color-border);
}

/* ---- Detail view ---- */

.detail-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.back-btn {
  background: none;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
  color: var(--color-text-muted);
  padding: 0.25rem;
}

.back-btn:hover {
  color: var(--color-text);
}

.detail-title {
  flex: 1;
}

.detail-title h2 {
  font-size: 1.25rem;
  font-weight: 600;
}

.detail-title .monitor-url {
  font-size: 0.875rem;
}

.detail-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
}

.stat-value.up { color: var(--color-up); }
.stat-value.down { color: var(--color-down); }
.stat-value.degraded { color: var(--color-degraded); }

/* ---- Check history table ---- */

.checks-section h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

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

.checks-table th,
.checks-table td {
  padding: 0.5rem 0.75rem;
  text-align: left;
  font-size: 0.8125rem;
  border-bottom: 1px solid var(--color-border);
}

.checks-table th {
  background: var(--color-bg);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-size: 0.6875rem;
}

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

/* ---- Toast ---- */

.toast-container {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  box-shadow: var(--shadow-md);
  animation: toast-in 0.2s ease;
  max-width: 360px;
}

.toast.error {
  background: #FEE2E2;
  color: #991B1B;
  border: 1px solid #FECACA;
}

.toast.success {
  background: #D1FAE5;
  color: #065F46;
  border: 1px solid #A7F3D0;
}

@keyframes toast-in {
  from { opacity: 0; transform: translateY(-0.5rem); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---- Loading ---- */

.loading {
  text-align: center;
  padding: 2rem;
  color: var(--color-text-muted);
}

/* ---- Responsive ---- */

@media (max-width: 640px) {
  .app-main {
    padding: 1rem;
  }

  .monitor-card {
    flex-wrap: wrap;
  }

  .monitor-meta {
    text-align: left;
    width: 100%;
    margin-left: 1.75rem;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .detail-stats {
    grid-template-columns: 1fr 1fr;
  }

  .header-user {
    display: none;
  }
}