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

:root {
  --bg: #0f1117;
  --bg-card: #1a1d27;
  --bg-card-hover: #1f2235;
  --bg-input: #12151f;
  --border: #2a2d3e;
  --border-focus: #5865f2;
  --text: #e2e8f0;
  --text-muted: #8892a4;
  --text-dim: #4a5568;
  --primary: #5865f2;
  --primary-hover: #4752c4;
  --primary-light: rgba(88,101,242,0.15);
  --success: #43b581;
  --success-light: rgba(67,181,129,0.15);
  --danger: #f04747;
  --danger-hover: #c73e3e;
  --danger-light: rgba(240,71,71,0.12);
  --warning: #faa61a;
  --warning-light: rgba(250,166,26,0.15);
  --info: #5865f2;
  --sidebar-w: 240px;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --transition: 0.18s ease;
}

html { font-size: 15px; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

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

code {
  font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  font-size: 0.85em;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 2px 6px;
  word-break: break-all;
}

/* ─── Layout ────────────────────────────────────────────────────────────────── */
.admin-page {
  display: flex;
  min-height: 100vh;
}

.main-content {
  flex: 1;
  margin-left: var(--sidebar-w);
  padding: 32px;
  max-width: 1100px;
}

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

.sidebar-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 20px 18px;
  border-bottom: 1px solid var(--border);
  font-weight: 700;
  font-size: 1rem;
}

.logo-icon { font-size: 1.4rem; }
.logo-text { color: var(--text); }

.nav-menu {
  list-style: none;
  padding: 12px 0;
  flex: 1;
}

.nav-item { margin: 2px 8px; }

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: background var(--transition), color var(--transition);
  text-decoration: none;
}

.nav-link:hover {
  background: var(--primary-light);
  color: var(--text);
  text-decoration: none;
}

.nav-item.active .nav-link {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
}

.nav-icon { font-size: 1.1rem; width: 20px; text-align: center; }

.sidebar-footer {
  padding: 14px 18px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.btn-logout {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  padding: 4px 8px;
  cursor: pointer;
  font-size: 1rem;
  transition: all var(--transition);
}

.btn-logout:hover {
  background: var(--danger-light);
  border-color: var(--danger);
  color: var(--danger);
}

/* ─── Page Header ───────────────────────────────────────────────────────────── */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
  flex-wrap: wrap;
  gap: 12px;
}

.page-header h1 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text);
}

.header-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* ─── Cards ─────────────────────────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 20px;
  overflow: hidden;
}

.card-danger {
  border-color: var(--danger);
}

.card-header {
  padding: 18px 22px 14px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.card-header h2 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.card-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.card-header-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.card-body {
  padding: 20px 22px;
}

/* ─── Stats Grid ────────────────────────────────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.stat-icon { font-size: 1.8rem; }

.stat-value {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
}

.stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ─── Buttons ───────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  text-decoration: none;
}

.btn:hover { text-decoration: none; }

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

.btn-secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn-secondary:hover { background: var(--bg-card-hover); border-color: var(--text-dim); }

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

.btn-full { width: 100%; justify-content: center; }

.btn-sm { padding: 5px 10px; font-size: 0.8rem; }

.btn-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

/* ─── Forms ─────────────────────────────────────────────────────────────────── */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group-inline {
  flex-direction: row;
  align-items: center;
  gap: 10px;
}

.form-group label {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-muted);
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group input[type="email"],
.form-group select,
.form-group textarea {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  padding: 9px 12px;
  font-size: 0.875rem;
  transition: border-color var(--transition);
  outline: none;
  width: 100%;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--border-focus);
}

.form-hint {
  font-size: 0.75rem;
  color: var(--text-dim);
}

.required { color: var(--danger); }

.input-with-toggle {
  position: relative;
  display: flex;
}

.input-with-toggle input { padding-right: 40px; }

.toggle-password {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  color: var(--text-muted);
  padding: 2px;
}

/* ─── Toggle Switch ─────────────────────────────────────────────────────────── */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 22px;
  flex-shrink: 0;
}

.toggle-switch input { opacity: 0; width: 0; height: 0; }

.toggle-slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: var(--border);
  border-radius: 22px;
  transition: background var(--transition);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  width: 16px; height: 16px;
  left: 3px; top: 3px;
  background: #fff;
  border-radius: 50%;
  transition: transform var(--transition);
}

.toggle-switch input:checked + .toggle-slider { background: var(--primary); }
.toggle-switch input:checked + .toggle-slider::before { transform: translateX(18px); }

/* ─── Server Cards ──────────────────────────────────────────────────────────── */
.server-card {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  transition: border-color var(--transition);
}

.server-card:hover { border-color: var(--text-dim); }

.server-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  flex-wrap: wrap;
  gap: 10px;
}

.server-card-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
}

.server-comment { color: var(--text-muted); font-size: 0.82rem; }

.server-card-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.server-card-body {
  padding: 0 16px 14px;
  border-top: 1px solid var(--border);
  padding-top: 10px;
}

.server-detail {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
}

.detail-label { color: var(--text-muted); white-space: nowrap; }

.drag-handle {
  cursor: grab;
  color: var(--text-dim);
  font-size: 1.1rem;
  user-select: none;
  padding: 0 2px;
}

.drag-handle:active { cursor: grabbing; }

.server-check-result {
  margin-top: 8px;
  font-size: 0.8rem;
  color: var(--text-muted);
  min-height: 18px;
}

/* ─── Status Dots & Badges ──────────────────────────────────────────────────── */
.server-status-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.dot-ok { background: var(--success); box-shadow: 0 0 6px var(--success); }
.dot-error { background: var(--danger); box-shadow: 0 0 6px var(--danger); }
.dot-unknown { background: var(--text-dim); }
.dot-disabled { background: var(--border); }

.badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 20px;
  white-space: nowrap;
}

.badge-ok { background: var(--success-light); color: var(--success); }
.badge-error { background: var(--danger-light); color: var(--danger); }
.badge-unknown { background: var(--bg-input); color: var(--text-dim); border: 1px solid var(--border); }
.badge-disabled { background: var(--bg-input); color: var(--text-dim); border: 1px solid var(--border); }

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

/* ─── Server Status Row (dashboard) ────────────────────────────────────────── */
.server-status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 8px;
}

.server-status-row:last-child { border-bottom: none; }

.server-status-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.server-name { font-size: 0.9rem; font-weight: 500; }
.server-url-small { font-size: 0.75rem; color: var(--text-muted); }

.server-status-meta {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ─── Sub URL Block ─────────────────────────────────────────────────────────── */
.sub-url-block {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.sub-url {
  flex: 1;
  min-width: 200px;
  padding: 10px 14px;
  font-size: 0.85rem;
  display: block;
}

.sub-url-label { font-size: 0.82rem; color: var(--text-muted); margin-right: 6px; }

.hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 6px;
}

/* ─── Modal ─────────────────────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
  backdrop-filter: blur(2px);
}

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

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 100%;
  max-width: 520px;
  box-shadow: var(--shadow);
  animation: modal-in 0.18s ease;
}

.modal-sm { max-width: 380px; }

@keyframes modal-in {
  from { opacity: 0; transform: scale(0.95) translateY(-10px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  border-bottom: 1px solid var(--border);
}

.modal-header h2 { font-size: 1rem; font-weight: 600; }

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.1rem;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.modal-close:hover { background: var(--danger-light); color: var(--danger); }

.modal-body {
  padding: 20px 22px;
}

.modal-body .form-group { margin-bottom: 14px; }

.modal-footer {
  padding: 14px 22px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

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

.login-container {
  width: 100%;
  max-width: 400px;
  padding: 20px;
}

.login-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  box-shadow: var(--shadow);
}

.login-logo {
  text-align: center;
  margin-bottom: 28px;
}

.login-logo .logo-icon { font-size: 2.5rem; display: block; margin-bottom: 8px; }
.login-logo h1 { font-size: 1.4rem; font-weight: 700; margin-bottom: 4px; }
.login-logo p { font-size: 0.82rem; color: var(--text-muted); }

.login-form .form-group { margin-bottom: 16px; }
.login-form .btn-full { margin-top: 8px; padding: 11px; font-size: 0.95rem; }

/* ─── Alerts ────────────────────────────────────────────────────────────────── */
.alert {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  margin-bottom: 16px;
}

.alert-error {
  background: var(--danger-light);
  border: 1px solid var(--danger);
  color: var(--danger);
}

.alert-icon { font-size: 1rem; }

/* ─── Toast ─────────────────────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  z-index: 9999;
  box-shadow: var(--shadow);
  animation: toast-in 0.2s ease;
  max-width: 340px;
}

.toast.hidden { display: none; }

.toast-success { background: var(--success); color: #fff; }
.toast-error { background: var(--danger); color: #fff; }
.toast-info { background: var(--primary); color: #fff; }
.toast-warning { background: var(--warning); color: #000; }

@keyframes toast-in {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ─── Info Table ────────────────────────────────────────────────────────────── */
.info-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.info-table tr { border-bottom: 1px solid var(--border); }
.info-table tr:last-child { border-bottom: none; }

.info-table td {
  padding: 10px 0;
  vertical-align: middle;
}

.info-table td:first-child {
  color: var(--text-muted);
  width: 200px;
}

/* ─── Danger Action ─────────────────────────────────────────────────────────── */
.danger-action {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.danger-action p {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ─── Empty State ───────────────────────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-muted);
}

.empty-icon { font-size: 3rem; margin-bottom: 12px; }

/* ─── Scrollbar ─────────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-dim); }

/* ─── Responsive ────────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .sidebar {
    width: 100%;
    height: auto;
    position: relative;
    flex-direction: row;
    flex-wrap: wrap;
  }

  .main-content {
    margin-left: 0;
    padding: 16px;
  }

  .admin-page { flex-direction: column; }

  .nav-menu {
    display: flex;
    flex-direction: row;
    padding: 8px;
    overflow-x: auto;
  }

  .nav-item { margin: 0 2px; }

  .sidebar-footer { display: none; }

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

  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}