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

:root {
  --bg-primary: #1a1a2e;
  --bg-secondary: #16213e;
  --bg-tertiary: #0f0f1a;
  --text-primary: #eee;
  --text-secondary: #888;
  --accent: #4ecca3;
  --accent-hover: #3db892;
  --danger: #e74c3c;
  --danger-hover: #c0392b;
  --border: #333;
  --radius: 6px;
}

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  overflow: hidden;
}

#app {
  height: 100%;
  display: flex;
  flex-direction: column;
}

.screen {
  height: 100%;
  width: 100%;
}

.hidden {
  display: none !important;
}

/* Login Screen */
#login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-container {
  text-align: center;
  padding: 2rem;
  background: var(--bg-secondary);
  border-radius: var(--radius);
  min-width: 300px;
}

.login-container h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  color: var(--accent);
}

.login-container .subtitle {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

#login-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

input {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 1rem;
}

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

button {
  padding: 0.75rem 1rem;
  border: none;
  border-radius: var(--radius);
  background: var(--accent);
  color: var(--bg-primary);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

button:hover {
  background: var(--accent-hover);
}

button.secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

button.secondary:hover {
  background: var(--border);
}

button.danger {
  background: var(--danger);
}

button.danger:hover {
  background: var(--danger-hover);
}

.error {
  color: var(--danger);
  font-size: 0.875rem;
  margin-top: 0.5rem;
}

/* Main Screen Layout */
#main-screen {
  display: grid;
  grid-template-rows: auto 1fr;
  grid-template-columns: 250px 1fr;
  grid-template-areas:
    "header header"
    "sidebar terminal";
}

#main-screen.sidebar-collapsed {
  grid-template-columns: 0 1fr;
}

#main-screen.sidebar-collapsed #sidebar {
  display: none;
}

/* Header */
#header {
  grid-area: header;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1rem;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
}

.header-left, .header-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

#header h1 {
  font-size: 1.25rem;
  color: var(--accent);
}

.icon-btn {
  width: 32px;
  height: 32px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--text-primary);
  font-size: 1.25rem;
}

.icon-btn:hover {
  background: var(--bg-tertiary);
}

.text-btn {
  background: transparent;
  color: var(--text-secondary);
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
}

.text-btn:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.status {
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  text-transform: uppercase;
}

.status.connected {
  background: rgba(78, 204, 163, 0.2);
  color: var(--accent);
}

.status.disconnected {
  background: rgba(231, 76, 60, 0.2);
  color: var(--danger);
}

/* Sidebar */
#sidebar {
  grid-area: sidebar;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

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

.sidebar-header h2 {
  font-size: 0.875rem;
  text-transform: uppercase;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
}

#workspace-list {
  flex: 1;
  overflow-y: auto;
  list-style: none;
}

#workspace-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.2s;
}

#workspace-list li:hover {
  background: var(--bg-tertiary);
}

#workspace-list li.active {
  background: var(--bg-tertiary);
  border-left: 3px solid var(--accent);
}

.workspace-info {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  flex: 1;
  min-width: 0;
}

.workspace-name {
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.workspace-status {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.workspace-actions {
  display: flex;
  gap: 0.5rem;
  opacity: 0;
  transition: opacity 0.2s;
}

#workspace-list li:hover .workspace-actions {
  opacity: 1;
}

.workspace-actions button {
  width: 24px;
  height: 24px;
  padding: 0;
  font-size: 0.875rem;
  background: transparent;
  color: var(--text-secondary);
}

.workspace-actions button:hover {
  color: var(--text-primary);
  background: var(--border);
}

.workspace-actions button.delete:hover {
  color: var(--danger);
}

/* Terminal Area */
#terminal-area {
  grid-area: terminal;
  background: var(--bg-tertiary);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* Terminal Toolbar */
#terminal-toolbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.5rem 1rem;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.toolbar-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-right: 0.25rem;
}

.toolbar-btn {
  width: 28px;
  height: 28px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 0.875rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s;
}

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

.toolbar-btn:active {
  transform: scale(0.95);
}

@media (max-width: 768px) {
  #terminal-toolbar {
    padding: 0.5rem;
    gap: 0.5rem;
    flex-wrap: wrap;
  }

  .toolbar-label {
    display: none;
  }

  .toolbar-btn {
    width: 36px;
    height: 36px;
    font-size: 1rem;
  }
}

#terminal-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
}

#terminal-placeholder p {
  margin: 0.25rem;
}

#terminal-placeholder .hint {
  font-size: 0.875rem;
}

#terminal {
  flex: 1;
  width: 100%;
  padding: 0.5rem;
  min-height: 0; /* Important for flex child */
}

#terminal .xterm {
  height: 100%;
}

/* Modal */
#modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal {
  background: var(--bg-secondary);
  padding: 1.5rem;
  border-radius: var(--radius);
  min-width: 300px;
  max-width: 90%;
}

.modal h3 {
  margin-bottom: 1rem;
}

.modal form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.modal-actions {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
}

/* Mobile Responsive */
@media (max-width: 768px) {
  #main-screen {
    grid-template-columns: 1fr;
    grid-template-areas:
      "header"
      "terminal";
  }

  #sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: 280px;
    z-index: 50;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }

  #main-screen.sidebar-open #sidebar {
    transform: translateX(0);
  }

  #main-screen.sidebar-collapsed #sidebar {
    display: flex;
  }

  /* Mobile sidebar backdrop */
  #sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 40;
  }

  #main-screen.sidebar-open #sidebar-backdrop {
    display: block;
  }
}

/* xterm.js customizations */
.xterm-viewport::-webkit-scrollbar {
  width: 8px;
}

.xterm-viewport::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

/* Template Selector */
.template-selector {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.template-selector label {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.template-selector select {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 1rem;
  cursor: pointer;
}

.template-selector select:focus {
  outline: none;
  border-color: var(--accent);
}

/* Settings Modal */
#settings-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.settings-modal {
  width: 500px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.modal-header h3 {
  margin: 0;
}

.modal-header .icon-btn {
  font-size: 1.5rem;
}

.settings-content {
  flex: 1;
  overflow-y: auto;
}

.settings-section {
  margin-bottom: 1.5rem;
}

.settings-section h4 {
  font-size: 0.875rem;
  text-transform: uppercase;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.settings-hint {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.secrets-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.secret-item {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 0.75rem;
  background: var(--bg-tertiary);
  border-radius: var(--radius);
}

.secret-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.secret-key {
  font-family: monospace;
  font-size: 0.875rem;
  color: var(--accent);
}

.secret-description {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.secret-input-row {
  display: flex;
  gap: 0.5rem;
}

.secret-input-row input {
  flex: 1;
  padding: 0.5rem;
  font-family: monospace;
  font-size: 0.875rem;
}

.secret-input-row button {
  padding: 0.5rem;
  min-width: 36px;
}

.secret-actions {
  display: flex;
  gap: 0.25rem;
}

.secret-actions button {
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
  background: transparent;
  color: var(--text-secondary);
}

.secret-actions button:hover {
  color: var(--text-primary);
  background: var(--border);
}

.secret-actions button.danger:hover {
  color: var(--danger);
}

/* Custom secret input */
.add-secret-row {
  display: flex;
  gap: 0.5rem;
  padding: 0.75rem;
  background: var(--bg-tertiary);
  border-radius: var(--radius);
  margin-bottom: 1rem;
}

.add-secret-row input {
  flex: 1;
  padding: 0.5rem;
  font-size: 0.875rem;
}

.add-secret-row input:first-child {
  font-family: monospace;
  text-transform: uppercase;
}

/* Toolbar spacer */
.toolbar-spacer {
  flex: 1;
}

/* Workspace Settings Modal */
#workspace-settings-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.workspace-settings-modal {
  width: 400px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
}

/* Resource graphs */
.resource-graphs {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.resource-graph {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.resource-graph-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.resource-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.resource-value {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-family: monospace;
}

.graph-container {
  position: relative;
  height: 60px;
  background: var(--bg-tertiary);
  border-radius: var(--radius);
  overflow: hidden;
  padding-left: 32px;
}

.graph-axis {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 2px 4px;
  font-size: 0.6rem;
  color: var(--text-secondary);
  text-align: right;
  border-right: 1px solid var(--border);
  background: var(--bg-secondary);
}

.sparkline {
  width: 100%;
  height: 100%;
}

.sparkline-line {
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.sparkline-fill {
  fill: rgba(78, 204, 163, 0.2);
  stroke: none;
}

.sparkline.warning .sparkline-line {
  stroke: #f39c12;
}

.sparkline.warning .sparkline-fill {
  fill: rgba(243, 156, 18, 0.2);
}

.sparkline.danger .sparkline-line {
  stroke: var(--danger);
}

.sparkline.danger .sparkline-fill {
  fill: rgba(231, 76, 60, 0.2);
}

.graph-percent {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

/* Size selector */
.size-selector {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.size-option {
  cursor: pointer;
}

.size-option input {
  display: none;
}

.size-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1rem;
  background: var(--bg-tertiary);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  transition: all 0.2s;
}

.size-option input:checked + .size-card {
  border-color: var(--accent);
  background: rgba(78, 204, 163, 0.1);
}

.size-option:hover .size-card {
  border-color: var(--accent);
}

.size-name {
  font-weight: 600;
  color: var(--text-primary);
}

.size-specs {
  font-size: 0.75rem;
  color: var(--text-secondary);
}