:root {
  --bg-main: #0a111a;
  --bg-surface: #111c2a;
  --bg-surface-elevated: #182638;
  --bg-card: #132030;
  --border-color: #22354c;
  --border-color-subtle: #1a2a3e;
  
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --accent: #0ea5e9;
  --accent-hover: #38bdf8;
  --accent-glow: rgba(14, 165, 233, 0.15);

  --color-green: #10b981;
  --color-green-bg: rgba(16, 185, 129, 0.12);
  --color-green-border: rgba(16, 185, 129, 0.3);

  --color-yellow: #f59e0b;
  --color-yellow-bg: rgba(245, 158, 11, 0.12);
  --color-yellow-border: rgba(245, 158, 11, 0.3);

  --color-red: #ef4444;
  --color-red-bg: rgba(239, 68, 68, 0.12);
  --color-red-border: rgba(239, 68, 68, 0.3);

  --color-grey: #64748b;
  --color-grey-bg: rgba(100, 116, 139, 0.12);
  --color-grey-border: rgba(100, 116, 139, 0.25);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-full: 9999px;

  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.25);
  --shadow-pop: 0 10px 30px rgba(0, 0, 0, 0.4);
}

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

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

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--accent-hover);
}

/* Header & Nav */
.site-header {
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-main);
}

.brand-link:hover {
  color: var(--text-main);
}

.brand-icon {
  width: 34px;
  height: 34px;
  background: linear-gradient(135deg, #0ea5e9, #0284c7);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 1.1rem;
  box-shadow: 0 0 12px rgba(14, 165, 233, 0.35);
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-badge {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  color: var(--accent);
  padding: 2px 7px;
  border-radius: var(--radius-full);
  margin-left: 6px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  list-style: none;
}

.nav-item a {
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 500;
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius-sm);
  transition: all 0.15s ease;
}

.nav-item a:hover,
.nav-item a.active {
  color: var(--text-main);
  background: var(--bg-surface-elevated);
}

.nav-user {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding-left: 0.75rem;
  border-left: 1px solid var(--border-color);
}

.user-badge {
  font-size: 0.8rem;
  color: var(--text-muted);
  background: var(--bg-surface-elevated);
  padding: 4px 9px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color-subtle);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  line-height: 1.3;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
}

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

.btn-secondary {
  background-color: var(--bg-surface-elevated);
  color: var(--text-main);
  border-color: var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--border-color);
  color: #ffffff;
}

.btn-danger {
  background-color: var(--color-red-bg);
  color: #fca5a5;
  border-color: var(--color-red-border);
}

.btn-danger:hover {
  background-color: var(--color-red);
  color: #ffffff;
}

.btn-sm {
  padding: 0.3rem 0.65rem;
  font-size: 0.8rem;
}

.btn-icon {
  padding: 0.35rem;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-dim);
}

.btn-icon:hover {
  color: var(--text-main);
  background: var(--bg-surface-elevated);
  border-color: var(--border-color);
}

/* Main Content Layout */
.main-wrapper {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  flex: 1;
  width: 100%;
}

.page-header {
  margin-bottom: 2rem;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.page-title-group h1 {
  font-size: 1.85rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-main);
}

.page-subtitle {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

/* Metric Summary Grid */
.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-card);
}

.metric-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.metric-value {
  font-size: 1.75rem;
  font-weight: 800;
  line-height: 1.1;
  color: var(--text-main);
}

.metric-online .metric-value { color: var(--color-green); }
.metric-warning .metric-value { color: var(--color-yellow); }
.metric-down .metric-value { color: var(--color-red); }
.metric-unconfigured .metric-value { color: var(--text-dim); }

/* Filter & Search Bar */
.filter-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
}

.search-input-wrap {
  position: relative;
  flex: 1;
  min-width: 240px;
  max-width: 400px;
}

.search-input {
  width: 100%;
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.8rem 0.45rem 2.2rem;
  color: var(--text-main);
  font-size: 0.88rem;
  outline: none;
  transition: border-color 0.15s ease;
}

.search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow);
}

.search-icon {
  position: absolute;
  left: 0.7rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-dim);
  pointer-events: none;
}

.filter-pills {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.pill-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all 0.15s ease;
}

.pill-btn:hover {
  background: var(--bg-surface-elevated);
  color: var(--text-main);
}

.pill-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.sort-select {
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 0.82rem;
  padding: 0.4rem 0.7rem;
  outline: none;
  cursor: pointer;
}

/* Client Cards Grid */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 1.25rem;
}

.client-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.client-card:hover {
  border-color: #2d4563;
  transform: translateY(-2px);
}

.client-card-header {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  margin-bottom: 1rem;
}

.client-avatar {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #1e3a5f, #0f243e);
  border: 1px solid #284c7a;
  color: #38bdf8;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  flex-shrink: 0;
}

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

.client-name {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
}

.client-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.env-list {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-bottom: 1rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-color-subtle);
  border-radius: var(--radius-md);
  padding: 0.75rem 0.85rem;
}

.env-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.85rem;
}

.env-tag {
  font-weight: 600;
  color: var(--text-muted);
  width: 80px;
}

.env-status-wrap {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex: 1;
  min-width: 0;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 1.2;
}

.status-badge.green {
  background: var(--color-green-bg);
  color: #34d399;
  border: 1px solid var(--color-green-border);
}

.status-badge.yellow {
  background: var(--color-yellow-bg);
  color: #fbbf24;
  border: 1px solid var(--color-yellow-border);
}

.status-badge.red {
  background: var(--color-red-bg);
  color: #f87171;
  border: 1px solid var(--color-red-border);
}

.status-badge.grey {
  background: var(--color-grey-bg);
  color: var(--text-dim);
  border: 1px solid var(--color-grey-border);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
}

.latency-badge {
  font-family: monospace;
  font-size: 0.76rem;
  color: var(--text-dim);
}

.env-url-link {
  color: var(--text-muted);
  font-size: 0.78rem;
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
  max-width: 140px;
}

.env-url-link:hover {
  color: var(--accent);
}

.env-actions {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  margin-left: auto;
}

.client-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-top: auto;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-color-subtle);
  font-size: 0.78rem;
  color: var(--text-dim);
}

.meta-buttons {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* Tools Cards Grid */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
}

.tool-card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.tool-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.tool-card-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
}

.tool-card-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  flex: 1;
}

.tool-links-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

/* Admin Table & Forms */
.admin-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-card);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-group label {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-muted);
}

.form-input, .form-textarea {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 0.9rem;
  padding: 0.55rem 0.8rem;
  outline: none;
  font-family: inherit;
  transition: border-color 0.15s ease;
}

.form-input:focus, .form-textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow);
}

.form-textarea {
  min-height: 70px;
  resize: vertical;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
  font-size: 0.88rem;
}

.data-table th {
  text-align: left;
  padding: 0.75rem 1rem;
  background: var(--bg-surface-elevated);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border-color);
}

.data-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-color-subtle);
  color: var(--text-main);
}

.data-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* Alert / Flash Message */
.alert {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.alert-error {
  background: var(--color-red-bg);
  border: 1px solid var(--color-red-border);
  color: #fca5a5;
}

.alert-success {
  background: var(--color-green-bg);
  border: 1px solid var(--color-green-border);
  color: #6ee7b7;
}

/* Login Card */
.login-wrap {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.login-card {
  width: 100%;
  max-width: 420px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  box-shadow: var(--shadow-pop);
}

.login-header {
  text-align: center;
  margin-bottom: 2rem;
}

.login-brand-icon {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, #0ea5e9, #0284c7);
  border-radius: var(--radius-md);
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.75rem;
  font-weight: 800;
  box-shadow: 0 0 20px rgba(14, 165, 233, 0.4);
}

/* Toast */
.toast-msg {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  box-shadow: var(--shadow-pop);
  z-index: 1000;
  display: none;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-color-subtle);
  background: var(--bg-surface);
  padding: 1.25rem 1.5rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-top: auto;
}

/* Responsive */
@media (max-width: 768px) {
  .header-container {
    flex-direction: column;
    align-items: flex-start;
  }
  .nav-links {
    width: 100%;
    justify-content: space-between;
    overflow-x: auto;
    padding-top: 0.5rem;
  }
  .clients-grid {
    grid-template-columns: 1fr;
  }
  .filter-bar {
    flex-direction: column;
    align-items: stretch;
  }
  .search-input-wrap {
    max-width: none;
  }
}