/* Variables */
:root {
  --bg: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --border: #30363d;
  --text: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;
  --accent: #58a6ff;
  --green: #3fb950;
  --yellow: #d29922;
  --red: #f85149;
}

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

body {
  font-family: 'IBM Plex Sans', -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

/* Login Screen */
.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  padding: 24px;
}

.login-screen.hidden {
  display: none;
}

.login-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 48px;
  text-align: center;
  max-width: 400px;
  width: 100%;
}

.login-logo {
  margin-bottom: 32px;
}

.login-logo .logo-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--green), var(--accent));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 600;
  font-size: 24px;
  color: var(--bg);
  margin: 0 auto 16px;
}

.login-logo h1 {
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 4px;
}

.login-logo span {
  font-size: 14px;
  color: var(--text-secondary);
}

.login-message {
  color: var(--text-secondary);
  margin-bottom: 32px;
  font-size: 15px;
}

.login-btn {
  width: 100%;
  padding: 14px 24px;
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.login-btn svg {
  flex-shrink: 0;
}

.login-footer {
  margin-top: 24px;
  font-size: 12px;
  color: var(--text-muted);
}

.login-error {
  background: rgba(248, 81, 73, 0.1);
  border: 1px solid var(--red);
  border-radius: 8px;
  padding: 12px;
  margin-bottom: 24px;
  color: var(--red);
  font-size: 14px;
}

/* App Layout */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 220px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 50;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px;
  border-bottom: 1px solid var(--border);
}

.sidebar-logo .logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--green), var(--accent));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 600;
  font-size: 12px;
  color: var(--bg);
}

.sidebar-logo h1 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.2;
}

.sidebar-logo span {
  font-size: 11px;
  color: var(--text-secondary);
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  margin: 0 12px;
  background: var(--bg-tertiary);
  border-radius: 8px;
  margin-bottom: 8px;
}

.user-avatar {
  width: 32px;
  height: 32px;
  background: var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 600;
  color: var(--bg);
  text-transform: uppercase;
}

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

.user-email {
  font-size: 12px;
  color: var(--text);
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.logout-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}

.logout-btn:hover {
  color: var(--red);
  background: rgba(248, 81, 73, 0.1);
}

.sidebar-nav {
  flex: 1;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: none;
  border: none;
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s;
  text-align: left;
  width: 100%;
  position: relative;
}

.nav-item:hover {
  background: var(--bg-tertiary);
  color: var(--text);
}

.nav-item.active {
  background: var(--bg-tertiary);
  color: var(--text);
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 24px;
  background: var(--accent);
  border-radius: 0 2px 2px 0;
}

.nav-item svg {
  flex-shrink: 0;
  opacity: 0.7;
}

.nav-item.active svg {
  opacity: 1;
  color: var(--accent);
}

.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--border);
}

/* Main Content */
.main-content {
  flex: 1;
  margin-left: 220px;
  padding: 24px;
  min-height: 100vh;
}

.section {
  display: none;
}

.section.active {
  display: block;
}

.section-header-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.section-header-bar h2 {
  font-size: 20px;
  font-weight: 600;
}

.header-tabs {
  display: flex;
  gap: 4px;
}

.header-tab {
  padding: 8px 16px;
  background: none;
  border: 1px solid transparent;
  border-radius: 6px;
  color: var(--text-secondary);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s;
}

.header-tab:hover {
  color: var(--text);
  background: var(--bg-tertiary);
}

.header-tab.active {
  color: var(--text);
  background: var(--bg-tertiary);
  border-color: var(--border);
}

.content-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.content-header h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-secondary);
}

/* Status Badge */
.status-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
}

.status-dot.error { background: var(--red); }

/* Stats */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
}

.stat-label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-value {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 28px;
  font-weight: 600;
  margin-top: 4px;
}

.stat-value.green { color: var(--green); }
.stat-value.yellow { color: var(--yellow); }

/* GPU Bar */
.gpu-bar-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 24px;
}

.gpu-bar-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 12px;
  font-size: 14px;
}

.gpu-bar {
  height: 12px;
  background: var(--bg-tertiary);
  border-radius: 6px;
  overflow: hidden;
}

.gpu-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--green), var(--accent));
  border-radius: 6px;
  transition: width 0.3s;
}

/* Buttons */
.btn {
  padding: 8px 16px;
  border-radius: 6px;
  border: 1px solid transparent;
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-primary {
  background: var(--green);
  color: var(--bg);
  border-color: var(--green);
}

.btn-primary:hover {
  filter: brightness(1.1);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

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

.btn-secondary:hover {
  border-color: var(--text-muted);
}

.btn-danger {
  background: transparent;
  color: var(--red);
  border-color: var(--red);
}

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

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}

/* Models List */
.models-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.model-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
}

.model-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 16px;
}

.model-name {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 15px;
  font-weight: 500;
  color: var(--accent);
}

.model-url {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
  word-break: break-all;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
}

.status-pill.running {
  background: rgba(63, 185, 80, 0.15);
  color: var(--green);
}

.status-pill.pending {
  background: rgba(210, 153, 34, 0.15);
  color: var(--yellow);
}

.status-pill.failed {
  background: rgba(248, 81, 73, 0.15);
  color: var(--red);
}

.model-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 16px;
  padding: 16px;
  background: var(--bg-tertiary);
  border-radius: 6px;
  margin-bottom: 16px;
}

.meta-item label {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 4px;
}

.meta-item span {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
}

.model-pods {
  margin-bottom: 16px;
}

.pod-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: var(--bg-tertiary);
  border-radius: 4px;
  margin-bottom: 6px;
  font-size: 13px;
}

.pod-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
}

.pod-dot.pending { background: var(--yellow); }
.pod-dot.failed { background: var(--red); }

.pod-name {
  font-family: 'IBM Plex Mono', monospace;
  color: var(--text-secondary);
  flex: 1;
}

.pod-node {
  color: var(--text-muted);
  font-size: 12px;
}

.model-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 60px 20px;
}

.empty-state h3 {
  margin: 16px 0 8px;
  font-size: 18px;
}

.empty-state p {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* Nodes */
.nodes-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.node-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
}

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

.node-name {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 14px;
}

.node-gpu-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.node-gpu-type {
  font-size: 12px;
  color: var(--text-secondary);
  padding: 4px 8px;
  background: var(--bg-tertiary);
  border-radius: 4px;
}

.node-gpu-bar {
  flex: 1;
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: 4px;
  overflow: hidden;
}

.node-gpu-bar-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 4px;
}

.node-gpu-count {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  color: var(--text-secondary);
}

/* Router */
.router-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
}

.router-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.router-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
}

/* Modal */
.modal-backdrop {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  z-index: 100;
  align-items: center;
  justify-content: center;
}

.modal-backdrop.open {
  display: flex;
}

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  width: 100%;
  max-width: 550px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  z-index: 101;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.modal-title {
  font-size: 18px;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 24px;
  cursor: pointer;
  line-height: 1;
  padding: 0;
}

.modal-close:hover {
  color: var(--text);
}

/* Forms */
.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-input {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 14px;
  font-family: 'IBM Plex Mono', monospace;
}

.form-input:focus {
  outline: none;
  border-color: var(--accent);
}

select.form-input {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238b949e' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

select.form-input option {
  background: var(--bg-tertiary);
  color: var(--text);
  padding: 8px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  margin-top: 24px;
}

/* Toast */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 200;
}

.toast {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 16px;
  margin-top: 8px;
  font-size: 14px;
  animation: slideIn 0.2s ease;
}

.toast.success { border-left: 3px solid var(--green); }
.toast.error { border-left: 3px solid var(--red); }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Loading */
.loading {
  text-align: center;
  padding: 40px;
  color: var(--text-secondary);
}

/* Tab Content */
.tab-content {
  display: none;
}

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

/* Responsive */
@media (max-width: 768px) {
  .sidebar {
    width: 60px;
  }
  .sidebar-logo span,
  .sidebar-logo h1,
  .nav-item span {
    display: none;
  }
  .sidebar-logo {
    justify-content: center;
    padding: 16px;
  }
  .sidebar-user {
    padding: 8px;
    margin: 0 8px;
    justify-content: center;
  }
  .sidebar-user .user-info {
    display: none;
  }
  .sidebar-user .logout-btn {
    display: none;
  }
  .nav-item {
    justify-content: center;
    padding: 12px;
  }
  .nav-item svg {
    margin: 0;
  }
  .main-content {
    margin-left: 60px;
    padding: 16px;
  }
  .sidebar-footer .status-badge span {
    display: none;
  }
  .sidebar-footer .status-badge {
    justify-content: center;
  }
}

@media (max-width: 640px) {
  .form-row {
    grid-template-columns: 1fr;
  }
  .stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .section-header-bar {
    flex-direction: column;
    gap: 12px;
    align-items: flex-start;
  }
}