:root,
[data-theme="dark"] {
  --bg: #0b0f14;
  --bg-elevated: #111820;
  --surface: rgba(22, 30, 40, 0.78);
  --surface-solid: #161e28;
  --surface-hover: rgba(32, 44, 58, 0.9);
  --sidebar-bg: rgba(8, 12, 18, 0.94);
  --sidebar-text: #8b9aab;
  --sidebar-active: rgba(46, 232, 121, 0.12);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text: #e8edf2;
  --muted: #7d8fa3;
  --accent: #2ee879;
  --accent-dark: #1aad5c;
  --accent-glow: rgba(46, 232, 121, 0.25);
  --accent-blue: #5b9dff;
  --danger: #ff4d6d;
  --ok: #2ee879;
  --warn: #f5b942;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.35), 0 8px 32px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.45), 0 24px 64px rgba(0, 0, 0, 0.3);
  --glass: blur(16px) saturate(1.4);
  --radius: 14px;
  --sidebar-w: 272px;
  --topbar-h: 68px;
  --font: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
}

[data-theme="light"] {
  --bg: #eef1f5;
  --bg-elevated: #f8f9fb;
  --surface: rgba(255, 255, 255, 0.9);
  --surface-solid: #ffffff;
  --surface-hover: rgba(240, 244, 248, 0.95);
  --sidebar-bg: rgba(17, 27, 33, 0.96);
  --sidebar-text: #aebac1;
  --sidebar-active: rgba(37, 211, 102, 0.15);
  --border: rgba(0, 0, 0, 0.08);
  --border-strong: rgba(0, 0, 0, 0.12);
  --text: #111b21;
  --muted: #667781;
  --accent: #25d366;
  --accent-dark: #128c7e;
  --accent-glow: rgba(37, 211, 102, 0.2);
  --shadow-sm: 0 1px 3px rgba(11, 20, 26, 0.08);
  --shadow: 0 1px 3px rgba(11, 20, 26, 0.08), 0 8px 24px rgba(11, 20, 26, 0.06);
  --shadow-lg: 0 4px 6px rgba(11, 20, 26, 0.04), 0 16px 48px rgba(11, 20, 26, 0.1);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(ellipse 80% 60% at 10% -10%, rgba(46, 232, 121, 0.07), transparent),
    radial-gradient(ellipse 60% 50% at 90% 100%, rgba(46, 100, 232, 0.05), transparent);
}
.hidden { display: none !important; }
.muted { color: var(--muted); font-size: 0.875rem; }
.err { color: var(--danger); font-size: 0.875rem; margin-top: 0.5rem; }
code {
  background: var(--bg-elevated);
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  font-size: 0.85em;
  border: 1px solid var(--border);
  color: var(--accent);
}

/* Login */
.login-panel {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  background: linear-gradient(145deg, #060a0f 0%, #0d1a14 40%, #0b1220 100%);
}
.login-card {
  width: min(440px, 100%);
  background: rgba(22, 30, 40, 0.75);
  backdrop-filter: var(--glass);
  -webkit-backdrop-filter: var(--glass);
  border: 1px solid var(--border-strong);
  border-radius: 20px;
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
}
[data-theme="light"] .login-card { background: var(--surface-solid); }
.brand-mark, .brand-logo {
  width: 56px; height: 56px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.5rem;
  margin-bottom: 1rem;
  box-shadow: 0 4px 20px var(--accent-glow);
}
.login-card h1 { margin: 0 0 0.5rem; font-size: 1.65rem; font-weight: 700; letter-spacing: -0.02em; }
label { display: block; margin: 1rem 0 0.35rem; font-size: 0.875rem; font-weight: 500; }
input, select, textarea {
  width: 100%;
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  color: var(--text);
  padding: 0.75rem 1rem;
  border-radius: 10px;
  font: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
}
[data-theme="light"] input, [data-theme="light"] select, [data-theme="light"] textarea { background: var(--surface-solid); }
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(46, 232, 121, 0.15);
}
button { font: inherit; cursor: pointer; border: 0; border-radius: 10px; transition: transform 0.15s, box-shadow 0.2s; }
.btn-primary {
  width: 100%;
  margin-top: 1.5rem;
  padding: 0.8rem 1.5rem;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  color: #fff;
  font-weight: 600;
  font-size: 1rem;
  box-shadow: 0 4px 16px var(--accent-glow);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 24px var(--accent-glow); }
.btn-ghost {
  background: transparent;
  color: var(--muted);
  padding: 0.55rem 1rem;
  border-radius: 10px;
  border: 1px solid transparent;
}
.btn-ghost:hover { background: var(--surface-hover); color: var(--text); border-color: var(--border); }
.btn-danger {
  background: var(--danger);
  color: #fff;
  padding: 0.55rem 1.1rem;
  font-size: 0.875rem;
}
.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 0.55rem 1.1rem;
  font-size: 0.875rem;
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }
.btn-accent {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  color: #fff;
  padding: 0.65rem 1.3rem;
  font-weight: 600;
  box-shadow: 0 4px 12px var(--accent-glow);
}
.btn-accent:hover { transform: translateY(-1px); }

/* App Shell */
.app-shell { display: flex; min-height: 100vh; }
.sidebar {
  width: var(--sidebar-w);
  background: var(--sidebar-bg);
  backdrop-filter: var(--glass);
  -webkit-backdrop-filter: var(--glass);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
  border-right: 1px solid var(--border);
}
.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 1.35rem 1.25rem 1.1rem;
}
.brand-text { font-weight: 700; font-size: 1.1rem; color: #fff; letter-spacing: -0.01em; }
.sidebar-nav { flex: 1; padding: 0.5rem 0.75rem; }
.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  padding: 0.8rem 1rem;
  background: transparent;
  color: var(--sidebar-text);
  border-radius: 10px;
  margin-bottom: 0.25rem;
  font-size: 0.95rem;
  text-align: left;
  transition: background 0.2s, color 0.2s;
}
.nav-item:hover { background: var(--sidebar-active); color: #fff; }
.nav-item.active {
  background: var(--sidebar-active);
  color: var(--accent);
  font-weight: 600;
  border: 1px solid rgba(46, 232, 121, 0.2);
}
.nav-icon { font-size: 1.1rem; opacity: 0.8; }
.sidebar-footer { padding: 1rem; border-top: 1px solid var(--border); }
.btn-webmail {
  display: block;
  text-align: center;
  padding: 0.7rem;
  background: rgba(46, 232, 121, 0.12);
  color: var(--accent);
  border: 1px solid rgba(46, 232, 121, 0.25);
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.875rem;
  transition: background 0.2s, border-color 0.2s;
}
.btn-webmail:hover { background: rgba(46, 232, 121, 0.2); border-color: var(--accent); }

.main-wrap {
  margin-left: var(--sidebar-w);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
.topbar {
  height: var(--topbar-h);
  background: var(--surface);
  backdrop-filter: var(--glass);
  -webkit-backdrop-filter: var(--glass);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  gap: 1rem;
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow-sm);
}
.breadcrumb { font-weight: 700; font-size: 1.15rem; flex: 1; letter-spacing: -0.02em; }
.topbar-right { display: flex; align-items: center; gap: 0.85rem; }
.icon-btn {
  background: transparent;
  border: 1px solid var(--border);
  font-size: 1.25rem;
  padding: 0.5rem 0.65rem;
  border-radius: 10px;
  display: none;
  color: var(--text);
}
.icon-btn:hover { border-color: var(--accent); color: var(--accent); }
.main-content { padding: 1.75rem; flex: 1; }

/* Cards & KPI */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}
.kpi-card {
  background: var(--surface);
  backdrop-filter: var(--glass);
  -webkit-backdrop-filter: var(--glass);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.kpi-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-strong);
}
.kpi-label { font-size: 0.78rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.05em; font-weight: 600; }
.kpi-value { font-size: 2.1rem; font-weight: 700; margin: 0.3rem 0; letter-spacing: -0.03em; }
.kpi-value a { color: var(--accent); text-decoration: none; }
.kpi-value a:hover { text-decoration: underline; }
.kpi-sub { font-size: 0.85rem; color: var(--muted); }

.card {
  background: var(--surface);
  backdrop-filter: var(--glass);
  -webkit-backdrop-filter: var(--glass);
  border-radius: var(--radius);
  padding: 1.5rem 1.75rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  margin-bottom: 1.25rem;
}
.card h2 { margin: 0 0 1rem; font-size: 1.15rem; font-weight: 700; letter-spacing: -0.02em; }
.hero-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background:
    linear-gradient(135deg, rgba(46, 232, 121, 0.16), transparent 45%),
    var(--surface);
}
.card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}
.card-head h2 { margin: 0; }

/* Table */
.data-table { width: 100%; border-collapse: collapse; }
.data-table th {
  text-align: left;
  padding: 0.8rem 1rem;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  border-bottom: 2px solid var(--border);
  font-weight: 600;
}
.data-table td {
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.data-table tr:hover td { background: var(--surface-hover); }
.data-table .actions { display: flex; gap: 0.5rem; justify-content: flex-end; }

/* Badges */
.badge {
  display: inline-block;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
}
.badge-ok { background: rgba(46, 232, 121, 0.15); color: var(--accent); border: 1px solid rgba(46, 232, 121, 0.25); }
.badge-err { background: rgba(255, 77, 109, 0.12); color: var(--danger); border: 1px solid rgba(255, 77, 109, 0.25); }
.badge-sys { background: rgba(91, 157, 255, 0.12); color: var(--accent-blue); border: 1px solid rgba(91, 157, 255, 0.25); }
pre {
  white-space: pre-wrap;
  word-break: break-word;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
  color: var(--muted);
}

/* Forms */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-row { display: flex; gap: 0.5rem; align-items: center; }
.form-row input { flex: 1; }
.form-suffix { color: var(--muted); white-space: nowrap; font-weight: 500; }
.form-actions { margin-top: 1.25rem; display: flex; gap: 0.75rem; flex-wrap: wrap; }

/* Server info */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}
.info-item {
  background: var(--bg-elevated);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  border: 1px solid var(--border);
  transition: border-color 0.2s;
}
.info-item:hover { border-color: var(--border-strong); }
.info-item dt { font-size: 0.78rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.05em; font-weight: 600; }
.info-item dd { margin: 0.3rem 0 0; font-weight: 600; font-size: 1rem; }

/* Toast */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  padding: 1rem 1.5rem;
  border-radius: 12px;
  color: #fff;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: 9999;
  animation: slideUp 0.3s ease;
}
.toast.ok { background: linear-gradient(135deg, var(--accent-dark), var(--accent)); }
.toast.err { background: var(--danger); }
@keyframes slideUp { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

/* Modal */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0, 0, 0, 0.55);
  display: flex; align-items: center; justify-content: center;
  z-index: 200;
  backdrop-filter: blur(8px);
}
.modal-box {
  background: var(--surface-solid);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 2rem;
  width: min(480px, 92vw);
  box-shadow: var(--shadow-lg);
}
.modal-box h3 { margin: 0 0 1.25rem; font-weight: 700; }

/* Responsive */
@media (max-width: 900px) {
  .sidebar { transform: translateX(-100%); transition: transform 0.25s; }
  .sidebar.open { transform: translateX(0); }
  .sidebar-backdrop.open { display: block; position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 99; }
  .main-wrap { margin-left: 0; }
  .icon-btn { display: block; }
  .form-grid { grid-template-columns: 1fr; }
}