/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-primary: #0f0f1a;
  --bg-secondary: #1a1a2e;
  --bg-card: #16213e;
  --text-primary: #eaeaea;
  --text-secondary: #a0a0a0;
  --accent: #4f8cff;
  --accent-hover: #6ba1ff;
  --success: #4ade80;
  --warning: #fbbf24;
  --danger: #f87171;
  --border: #2a2a4a;
}

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

/* ========== Entry Page ========== */
.entry-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.header {
  text-align: center;
  padding: 3rem 1rem 2rem;
  background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  position: relative;
}

.logout-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: transparent;
  border: 1px solid var(--text-secondary);
  color: var(--text-secondary);
  padding: 0.5rem 1rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
  transition: all 0.2s;
}

.logout-btn:hover {
  border-color: var(--danger);
  color: var(--danger);
}

.header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--accent) 0%, #a855f7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.container-grid {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1.25rem;
  padding: 2rem;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

.container-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem 1rem;
  text-align: center;
  transition: all 0.2s ease;
  cursor: default;
  opacity: 0.6;
}

.container-card.available {
  cursor: pointer;
  opacity: 1;
  border-color: var(--success);
}

.container-card.available:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(74, 222, 128, 0.2);
  border-color: var(--success);
}

.container-card.in-use {
  border-color: var(--warning);
  opacity: 0.7;
}

.container-card.stopped {
  border-color: var(--danger);
  opacity: 0.5;
}

.container-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}

.container-name {
  font-weight: 600;
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.container-status {
  font-size: 0.85rem;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  display: inline-block;
}

.status-available {
  background: rgba(74, 222, 128, 0.2);
  color: var(--success);
}

.status-in-use {
  background: rgba(251, 191, 36, 0.2);
  color: var(--warning);
}

.status-stopped {
  background: rgba(248, 113, 113, 0.2);
  color: var(--danger);
}

.footer {
  text-align: center;
  padding: 1.5rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  border-top: 1px solid var(--border);
}

.loading, .error, .no-containers {
  grid-column: 1 / -1;
  text-align: center;
  padding: 3rem;
  color: var(--text-secondary);
}

.error {
  color: var(--danger);
}

/* ========== Lab Page ========== */
.lab-page {
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.lab-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1.5rem;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
}

.lab-title {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 1.1rem;
  font-weight: 600;
}

.back-btn {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 1.5rem;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  transition: all 0.2s;
}

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

.lab-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.status-indicator {
  padding: 0.35rem 0.75rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
}

.status-indicator.connected {
  background: rgba(74, 222, 128, 0.2);
  color: var(--success);
}

.status-indicator.disconnected {
  background: rgba(248, 113, 113, 0.2);
  color: var(--danger);
}

.browser-btn {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 0.5rem 1rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.2s;
}

.browser-btn:hover {
  background: var(--accent);
  color: white;
}

.leave-btn {
  background: transparent;
  border: 1px solid var(--danger);
  color: var(--danger);
  padding: 0.5rem 1rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.2s;
}

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

.lab-content {
  flex: 1;
  display: flex;
  overflow: hidden;
}

/* Instructions Panel */
.instructions-panel {
  width: 400px;
  min-width: 300px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  transition: width 0.3s ease, min-width 0.3s ease;
}

.instructions-panel.collapsed {
  width: 50px;
  min-width: 50px;
}

.instructions-panel.collapsed .instructions-body {
  display: none;
}

.instructions-panel.collapsed .instructions-header h2 {
  display: none;
}

.instructions-panel.collapsed .toggle-btn {
  transform: rotate(180deg);
}

.instructions-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
}

.instructions-header h2 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.toggle-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 1rem;
  padding: 0.25rem;
  transition: transform 0.3s ease;
}

.toggle-btn:hover {
  color: var(--text-primary);
}

/* Section Selector */
.section-selector {
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--border);
}

.section-selector select {
  width: 100%;
  padding: 0.6rem 0.75rem;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-primary);
  font-size: 0.9rem;
  cursor: pointer;
  transition: border-color 0.2s;
}

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

.section-selector select option {
  background: var(--bg-primary);
  color: var(--text-primary);
  padding: 0.5rem;
}

.instructions-panel.collapsed .section-selector {
  display: none;
}

.instructions-body {
  flex: 1;
  padding: 1.5rem;
  overflow-y: auto;
  line-height: 1.7;
}

.instructions-body h1 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--accent);
}

.instructions-body h2 {
  font-size: 1.25rem;
  margin: 1.5rem 0 0.75rem;
  color: var(--text-primary);
}

.instructions-body h3 {
  font-size: 1.1rem;
  margin: 1.25rem 0 0.5rem;
  color: var(--text-primary);
}

.instructions-body p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.instructions-body ul, .instructions-body ol {
  margin: 0.75rem 0 1rem 1.5rem;
  color: var(--text-secondary);
}

.instructions-body li {
  margin-bottom: 0.5rem;
}

.instructions-body code {
  background: var(--bg-primary);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-family: 'Fira Code', 'Cascadia Code', monospace;
  font-size: 0.9em;
  color: #f9e2af;
}

.instructions-body pre {
  background: var(--bg-primary);
  padding: 1rem;
  border-radius: 8px;
  overflow-x: auto;
  margin: 1rem 0;
}

.instructions-body pre code {
  background: transparent;
  padding: 0;
}

.instructions-body blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 1rem;
  margin: 1rem 0;
  color: var(--text-secondary);
  font-style: italic;
}

/* Instruction Images - Responsive */
.instructions-body img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin: 1rem 0;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.2s;
  border: 1px solid var(--border);
}

.instructions-body img:hover {
  opacity: 0.9;
  transform: scale(1.02);
}

/* Image Lightbox Modal */
.image-lightbox {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  z-index: 1000;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}

.image-lightbox.active {
  display: flex;
}

.image-lightbox img {
  max-width: 90%;
  max-height: 90%;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: 0 4px 32px rgba(0, 0, 0, 0.5);
}

.lightbox-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

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

/* Terminal Panel */
.terminal-panel {
  flex: 1;
  background: #1e1e2e;
  padding: 0.5rem 0.5rem 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

#terminal {
  flex: 1;
  width: 100%;
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

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

::-webkit-scrollbar-thumb:hover {
  background: #3a3a5a;
}

/* ========== Login Page ========== */
.login-page {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  padding: 1rem;
}

.login-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2.5rem;
  width: 100%;
  max-width: 400px;
  text-align: center;
}

.login-logo {
  margin-bottom: 1.5rem;
}

.logo-img {
  width: 80px;
  height: 80px;
  object-fit: contain;
}

.login-container h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--accent) 0%, #a855f7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.login-subtitle {
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.login-form {
  text-align: left;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-group input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 140, 255, 0.2);
}

.form-group input::placeholder {
  color: var(--text-secondary);
  opacity: 0.6;
}

.error-message {
  display: none;
  background: rgba(248, 113, 113, 0.1);
  border: 1px solid var(--danger);
  color: var(--danger);
  padding: 0.75rem 1rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.login-btn {
  width: 100%;
  padding: 0.875rem;
  background: linear-gradient(135deg, var(--accent) 0%, #6366f1 100%);
  border: none;
  border-radius: 8px;
  color: white;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

.login-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(79, 140, 255, 0.4);
}

.login-btn:active {
  transform: translateY(0);
}

/* ========== Container Stats (Index Cards) ========== */
.container-stats {
  margin-top: 0.75rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
  text-align: left;
}

.stat-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.35rem;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.stat-label {
  width: 30px;
  font-weight: 600;
  flex-shrink: 0;
}

.stat-bar {
  flex: 1;
  height: 4px;
  background: var(--bg-primary);
  border-radius: 2px;
  overflow: hidden;
}

.stat-bar-fill {
  height: 100%;
  border-radius: 2px;
  transition: width 0.5s ease;
}

.stat-bar-ok .stat-bar-fill { background: var(--success); }
.stat-bar-warn .stat-bar-fill { background: var(--warning); }
.stat-bar-danger .stat-bar-fill { background: var(--danger); }

.stat-value {
  width: 38px;
  text-align: right;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}

.stat-net {
  font-size: 0.7rem;
  color: var(--text-secondary);
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  margin-top: 0.25rem;
}

/* ========== Terminal Stats Bar (Lab Page) ========== */
.terminal-stats-bar {
  height: 32px;
  min-height: 32px;
  background: #181825;
  display: flex;
  align-items: center;
  padding: 0 1rem;
  gap: 0;
  font-size: 0.8rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border);
}

.ts-metric {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0 1rem;
}

.ts-metric:not(:last-child) {
  border-right: 1px solid var(--border);
}

.ts-label {
  font-weight: 600;
  color: var(--text-secondary);
}

.ts-bar {
  width: 60px;
  height: 6px;
  background: var(--bg-primary);
  border-radius: 3px;
  overflow: hidden;
}

.ts-bar-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.5s ease;
}

.ts-bar-ok .ts-bar-fill { background: var(--success); }
.ts-bar-warn .ts-bar-fill { background: var(--warning); }
.ts-bar-danger .ts-bar-fill { background: var(--danger); }

.ts-value {
  font-variant-numeric: tabular-nums;
}

/* Responsive */
@media (max-width: 768px) {
  .header h1 {
    font-size: 1.75rem;
  }

  .container-grid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    padding: 1rem;
    gap: 1rem;
  }

  .lab-content {
    flex-direction: column;
  }

  .instructions-panel {
    width: 100%;
    height: 40%;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .instructions-panel.collapsed {
    width: 100%;
    height: 50px;
    min-width: 100%;
  }

  .terminal-panel {
    flex: 1;
  }

  .container-stats {
    display: none;
  }

  .terminal-stats-bar {
    font-size: 0.7rem;
    padding: 0 0.5rem;
  }

  .ts-metric {
    padding: 0 0.5rem;
  }

  .ts-bar {
    width: 40px;
  }
}