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

:root {
  --bg: #0b0e1a;
  --bg-secondary: #111827;
  --card-bg: rgba(255, 255, 255, 0.04);
  --card-border: rgba(255, 255, 255, 0.06);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --gradient-primary: linear-gradient(135deg, #667eea, #764ba2);
  --gradient-accent: linear-gradient(135deg, #f093fb, #f5576c);
  --input-bg: rgba(255, 255, 255, 0.04);
  --input-border: rgba(255, 255, 255, 0.08);
}

body.light {
  --bg: #f1f5f9;
  --bg-secondary: #e2e8f0;
  --card-bg: rgba(255, 255, 255, 0.8);
  --card-border: rgba(0, 0, 0, 0.06);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  --input-bg: rgba(0, 0, 0, 0.04);
  --input-border: rgba(0, 0, 0, 0.08);
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  padding: 24px;
  transition: background 0.3s, color 0.3s;
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

/* Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 28px;
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  border-radius: 20px;
  border: 1px solid var(--card-border);
  margin-bottom: 32px;
  box-shadow: var(--shadow);
}

header h1 {
  font-size: 1.6rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

header .header-actions {
  display: flex;
  gap: 12px;
  align-items: center;
}

.theme-toggle {
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 50%;
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.2rem;
  transition: all 0.3s;
  color: var(--text-primary);
}

.theme-toggle:hover {
  transform: scale(1.1);
  background: rgba(255, 255, 255, 0.1);
}

.btn-danger {
  background: linear-gradient(135deg, #f43f5e, #e11d48);
  color: white;
  border: none;
  padding: 10px 24px;
  border-radius: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s;
  box-shadow: 0 4px 15px rgba(244, 63, 94, 0.3);
}

.btn-danger:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(244, 63, 94, 0.5);
}

/* Tabs */
.tabs {
  display: flex;
  gap: 8px;
  background: var(--card-bg);
  padding: 6px;
  border-radius: 16px;
  margin-bottom: 28px;
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.tab-btn {
  background: transparent;
  border: none;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: 12px;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.3s;
  flex: 1;
}

.tab-btn:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.tab-btn.active {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 20px rgba(102, 126, 234, 0.4);
}

.tab-content {
  display: none;
  animation: fadeIn 0.3s ease;
}

.tab-content.active {
  display: block;
}

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

/* Cards */
.card {
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 28px 32px;
  margin-bottom: 28px;
  box-shadow: var(--shadow);
  transition: all 0.3s;
}

.card:hover {
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.2);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 12px;
}

.card-header h2 {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-primary);
}

.badge {
  background: rgba(102, 126, 234, 0.15);
  color: #667eea;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
}

.add-form {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-end;
  margin-bottom: 20px;
}

.add-form input {
  flex: 1 1 200px;
  padding: 12px 18px;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 12px;
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: all 0.3s;
  outline: none;
}

.add-form input:focus {
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

/* Settings grid */
.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.settings-grid .form-group {
  margin-bottom: 0;
}

.settings-grid label {
  display: block;
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 0.8rem;
  margin-bottom: 6px;
}

.settings-grid input,
.settings-grid select {
  width: 100%;
  padding: 12px 16px;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 12px;
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
  transition: all 0.3s;
}

.settings-grid input:focus,
.settings-grid select:focus {
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

.btn-primary {
  background: var(--gradient-primary);
  border: none;
  padding: 12px 28px;
  border-radius: 12px;
  color: white;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(102, 126, 234, 0.5);
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th, td {
  padding: 12px 10px;
  text-align: left;
  border-bottom: 1px solid var(--card-border);
}

th {
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  font-size: 0.7rem;
  letter-spacing: 0.5px;
}

td {
  color: var(--text-primary);
}

.delete-btn {
  background: linear-gradient(135deg, #f43f5e, #e11d48);
  border: none;
  color: white;
  padding: 4px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.75rem;
  transition: all 0.3s;
}

.delete-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 15px rgba(244, 63, 94, 0.4);
}

.edit-btn {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  border: none;
  color: white;
  padding: 4px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.75rem;
  margin-right: 4px;
  transition: all 0.3s;
}

.edit-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
}

.status-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-right: 8px;
}

.status-dot.idle { background: #22c55e; }
.status-dot.busy { background: #eab308; }
.status-dot.offline { background: #ef4444; }

/* Modal */
.modal {
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.modal.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background: var(--card-bg);
  backdrop-filter: blur(24px);
  border: 1px solid var(--card-border);
  border-radius: 24px;
  padding: 40px;
  max-width: 440px;
  width: 90%;
  position: relative;
  box-shadow: 0 32px 72px rgba(0, 0, 0, 0.4);
  transform: scale(0.9) translateY(20px);
  transition: all 0.3s;
}

.modal.active .modal-content {
  transform: scale(1) translateY(0);
}

.modal-content .close {
  position: absolute;
  top: 16px;
  right: 20px;
  font-size: 1.8rem;
  font-weight: 300;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.2s;
}

.modal-content .close:hover {
  color: #f43f5e;
  transform: rotate(90deg);
}

.modal-content h2 {
  margin-bottom: 24px;
  font-weight: 600;
  color: var(--text-primary);
}

.modal-content .form-group {
  margin-bottom: 16px;
}

.modal-content .form-group label {
  display: block;
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: 4px;
}

.modal-content .form-group input {
  width: 100%;
  padding: 12px 16px;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 12px;
  color: var(--text-primary);
  font-size: 0.95rem;
  outline: none;
  transition: all 0.3s;
}

.modal-content .form-group input:focus {
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

.modal-content .error-message {
  color: #f43f5e;
  margin-top: 12px;
  font-weight: 500;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 16px 28px;
  color: var(--text-primary);
  font-weight: 500;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.3s;
  z-index: 999;
  pointer-events: none;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}