/*
 * PubFlow Admin Interface
 * Aesthetic: Utilitarian Refined - clean, readable, efficient
 */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

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

:root {
  /* Surface layers */
  --surface-0: #0a0a0b;
  --surface-1: #111113;
  --surface-2: #18181b;
  --surface-3: #232326;
  --surface-4: #2e2e32;

  /* Text hierarchy */
  --text-primary: #fafafa;
  --text-secondary: #a1a1aa;
  --text-tertiary: #71717a;
  --text-muted: #52525b;

  /* Accent - warm amber for workflows */
  --accent: #f59e0b;
  --accent-dim: #b45309;
  --accent-glow: rgba(245, 158, 11, 0.15);
  --accent-subtle: rgba(245, 158, 11, 0.08);

  /* Semantic */
  --success: #22c55e;
  --success-dim: rgba(34, 197, 94, 0.15);
  --danger: #ef4444;
  --danger-dim: rgba(239, 68, 68, 0.15);
  --info: #3b82f6;
  --info-dim: rgba(59, 130, 246, 0.15);

  /* Borders */
  --border: rgba(255, 255, 255, 0.06);
  --border-subtle: rgba(255, 255, 255, 0.04);
  --border-focus: rgba(245, 158, 11, 0.5);

  /* Typography */
  --font-sans: 'IBM Plex Sans', -apple-system, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  /* Spacing scale */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px var(--accent-glow);
}

/* Base */
body {
  font-family: var(--font-sans);
  background: var(--surface-0);
  color: var(--text-primary);
  min-height: 100vh;
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Subtle grid pattern background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.01) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.01) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
  z-index: 0;
}

#app {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  z-index: 1;
}

/* ============================================
   HEADER
   ============================================ */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-xl);
  background: var(--surface-1);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}

.logo-link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: inherit;
  transition: var(--transition-fast);
}

.logo-link:hover {
  opacity: 0.85;
}

.logo-icon {
  width: 32px;
  height: 32px;
  color: var(--accent);
}

.logo-link h1 {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin: 0;
}

.version {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
  margin-left: var(--space-xs);
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.pubhub-link {
  display: flex;
  align-items: center;
  color: var(--text-tertiary);
  transition: var(--transition-fast);
}

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

nav {
  display: flex;
  gap: 2px;
  background: var(--surface-2);
  padding: 3px;
  border-radius: 8px;
}

.nav-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: var(--space-sm) var(--space-md);
  border-radius: 6px;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  transition: var(--transition-fast);
}

.nav-btn:hover {
  color: var(--text-primary);
  background: var(--surface-3);
}

.nav-btn.active {
  background: var(--surface-4);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

.status {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-tertiary);
  padding: 6px 12px;
  background: var(--surface-2);
  border-radius: 6px;
  border: 1px solid var(--border);
}

.status.connected {
  color: var(--success);
  border-color: rgba(34, 197, 94, 0.2);
  background: var(--success-dim);
}

.status.error {
  color: var(--danger);
  border-color: rgba(239, 68, 68, 0.2);
  background: var(--danger-dim);
}

/* ============================================
   MAIN CONTENT
   ============================================ */
main {
  flex: 1;
  padding: var(--space-xl);
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

/* Service description like pubbin/pubmem */
.service-description {
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--border);
}

.service-description p {
  color: var(--text-secondary);
  font-size: 14px;
  margin: 0;
}

.service-description strong {
  color: var(--text-primary);
}

/* Section header with title + toolbar */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-lg);
}

.section-header h2 {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin: 0;
}

.view {
  display: none;
  animation: fadeIn var(--transition-base) ease-out;
}

.view.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============================================
   TOOLBAR
   ============================================ */
.toolbar {
  display: flex;
  gap: var(--space-sm);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--surface-3);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 10px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  transition: var(--transition-fast);
}

.btn:hover {
  background: var(--surface-4);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.1);
}

.btn:active {
  transform: scale(0.98);
}

.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #000;
}

.btn.primary:hover {
  background: #fbbf24;
  border-color: #fbbf24;
  box-shadow: var(--shadow-glow);
}

.btn.danger {
  background: var(--danger-dim);
  border-color: rgba(239, 68, 68, 0.3);
  color: var(--danger);
}

.btn.danger:hover {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}

.btn.small {
  padding: 6px 12px;
  font-size: 12px;
  border-radius: 6px;
}

/* ============================================
   CARDS
   ============================================ */
.flow-list, .component-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--space-md);
}

.card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: var(--space-lg);
  cursor: pointer;
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-glow), transparent);
  opacity: 0;
  transition: var(--transition-base);
}

.card:hover {
  border-color: rgba(255, 255, 255, 0.1);
  background: var(--surface-2);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.card:hover::before {
  opacity: 1;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-sm);
}

.card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.card-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  padding: 4px 8px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.card-badge.enabled {
  background: var(--success-dim);
  color: var(--success);
}

.card-badge.disabled {
  background: var(--surface-3);
  color: var(--text-muted);
}

.card-description {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
  line-height: 1.6;
}

.card-meta {
  display: flex;
  gap: var(--space-md);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-tertiary);
}

.card-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ============================================
   MODALS
   ============================================ */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
}

.modal.active {
  display: flex;
  animation: modalFadeIn var(--transition-base) ease-out;
}

@keyframes modalFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-content {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 16px;
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
  animation: modalSlideIn var(--transition-slow) ease-out;
}

@keyframes modalSlideIn {
  from { opacity: 0; transform: translateY(16px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-content.flow-editor {
  max-width: 800px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-lg) var(--space-xl);
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}

.modal-header h2 {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.close-btn {
  background: var(--surface-3);
  border: none;
  color: var(--text-secondary);
  width: 32px;
  height: 32px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.close-btn:hover {
  background: var(--surface-4);
  color: var(--text-primary);
}

.modal-body, .flow-editor-body {
  padding: var(--space-xl);
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  border-top: 1px solid var(--border);
  background: var(--surface-2);
}

/* ============================================
   FORMS
   ============================================ */
.form-group {
  margin-bottom: var(--space-md);
}

.form-group label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group select,
.form-group textarea {
  width: 100%;
  background: var(--surface-0);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 10px 14px;
  border-radius: 8px;
  font-family: var(--font-sans);
  font-size: 14px;
  transition: var(--transition-fast);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group select {
  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='%23a1a1aa' d='M3 4.5L6 7.5L9 4.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
}

.form-group input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  cursor: pointer;
}

.checkbox-group label {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  cursor: pointer;
  text-transform: none;
  letter-spacing: normal;
  font-size: 14px;
  color: var(--text-primary);
}

.checkbox-group label span {
  user-select: none;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

/* ============================================
   FLOW EDITOR
   ============================================ */
.flow-config {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--border);
}

.trigger-section, .steps-section {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: var(--space-lg);
  margin-bottom: var(--space-md);
}

.trigger-section h3, .steps-section h3 {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-tertiary);
  margin-bottom: var(--space-md);
}

.steps-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-md);
}

.steps-header h3 {
  margin-bottom: 0;
}

.steps-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.step-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: var(--space-md);
  transition: var(--transition-fast);
}

.step-item:hover {
  border-color: rgba(255, 255, 255, 0.1);
  background: var(--surface-3);
}

.step-number {
  width: 28px;
  height: 28px;
  background: var(--accent);
  color: #000;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  flex-shrink: 0;
}

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

.step-info .step-id {
  font-weight: 600;
  font-size: 13px;
  color: var(--text-primary);
}

.step-info .step-type {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-tertiary);
  margin-top: 2px;
}

.step-actions {
  display: flex;
  gap: 2px;
  opacity: 0.5;
  transition: var(--transition-fast);
}

.step-item:hover .step-actions {
  opacity: 1;
}

.step-actions button {
  background: var(--surface-3);
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 6px 8px;
  border-radius: 4px;
  font-size: 12px;
  transition: var(--transition-fast);
}

.step-actions button:hover {
  background: var(--surface-4);
  color: var(--text-primary);
}

/* ============================================
   EMPTY STATE
   ============================================ */
.empty-state {
  text-align: center;
  padding: var(--space-2xl);
  color: var(--text-tertiary);
}

.empty-state h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

.empty-state p {
  font-size: 13px;
  max-width: 280px;
  margin: 0 auto;
  line-height: 1.6;
}

.empty-state.auth-required {
  padding: var(--space-2xl) var(--space-xl);
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 12px;
  max-width: 400px;
  margin: var(--space-2xl) auto;
}

.empty-state.auth-required h3 {
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

.empty-state.auth-required p {
  max-width: none;
  margin-bottom: var(--space-md);
}

/* ============================================
   TYPE BADGES
   ============================================ */
.type-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  padding: 3px 8px;
  border-radius: 4px;
  margin-left: var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.type-badge.classify { background: var(--info-dim); color: var(--info); }
.type-badge.summarize { background: rgba(245, 158, 11, 0.15); color: var(--accent); }
.type-badge.generate { background: var(--success-dim); color: var(--success); }
.type-badge.extract { background: rgba(168, 85, 247, 0.15); color: #a855f7; }
.type-badge.translate { background: rgba(236, 72, 153, 0.15); color: #ec4899; }
.type-badge.decide { background: rgba(6, 182, 212, 0.15); color: #06b6d4; }

/* ============================================
   SCROLLBAR
   ============================================ */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--surface-1);
}

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

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  header {
    flex-wrap: wrap;
    gap: var(--space-md);
    padding: var(--space-md);
  }

  nav {
    order: 3;
    width: 100%;
    justify-content: center;
  }

  main {
    padding: var(--space-md);
  }

  .flow-list, .component-list {
    grid-template-columns: 1fr;
  }

  .flow-config {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .modal-content {
    max-height: 100vh;
    border-radius: 0;
  }
}