/* ==========================================================================
   ProHance — Adaptive Prompt Builder Design System
   ========================================================================== */

:root {
  /* Color Palette — Refined Neutral & Indigo SaaS Theme */
  --canvas-dark: #000000;
  --primary: #494fdf;
  --bg-app: #f8fafc;
  --bg-sidebar: #ffffff;
  --bg-card: #ffffff;
  --bg-subtle: #f1f5f9;
  --bg-hover: #f8fafc;
  --bg-active: #eef2ff;

  --border-color: #e2e8f0;
  --border-subtle: #edf2f7;
  --border-focus: #6366f1;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-inverse: #ffffff;

  --primary-accent: #4f46e5;
  --primary-hover: #4338ca;
  --accent-light: #eef2ff;
  --accent-border: #c7d2fe;

  --success-color: #10b981;
  --success-light: #ecfdf5;
  --success-text: #047857;

  --warning-color: #f59e0b;
  --warning-light: #fffbeb;
  --warning-text: #b45309;

  --danger-color: #ef4444;
  --danger-light: #fef2f2;
  --danger-text: #b91c1c;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Dimensions & Spacing */
  --sidebar-width: 250px;
  --inspector-width: 330px;
  --header-height: 60px;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  --shadow-subtle: 0 1px 2px 0 rgba(0, 0, 0, 0.03);
  --shadow-card: 0 1px 3px 0 rgba(0, 0, 0, 0.05), 0 1px 2px -1px rgba(0, 0, 0, 0.05);
  --shadow-float: 0 4px 16px -2px rgba(15, 23, 42, 0.08), 0 2px 6px -2px rgba(15, 23, 42, 0.04);
  --shadow-hero: 0 10px 30px -5px rgba(79, 70, 229, 0.08), 0 4px 12px -2px rgba(15, 23, 42, 0.04);
  --shadow-modal: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.05);

  --transition-fast: 0.15s ease;
  --transition-normal: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  background-color: var(--bg-app);
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: transparent;
  color: inherit;
}

input, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Backdrop for Mobile Drawers */
.drawer-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.4);
  backdrop-filter: blur(2px);
  z-index: 35;
}

.drawer-backdrop.active {
  display: block;
}

/* ==========================================================================
   Layout Shell
   ========================================================================== */

.app-shell {
  display: flex;
  height: 100vh;
  width: 100%;
  max-width: 100vw;
  overflow: hidden;
  position: relative;
}

/* ==========================================================================
   Left Sidebar
   ========================================================================== */

.app-sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  height: 100vh;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  z-index: 40;
  transition: transform var(--transition-normal);
}

.sidebar-header {
  padding: 16px 16px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
}

.brand-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  outline: none;
}

.brand-badge:hover .brand-name {
  color: var(--primary-accent);
}

.brand-glyph {
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, var(--primary-accent), #6366f1);
  color: #ffffff;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  box-shadow: 0 2px 6px rgba(79, 70, 229, 0.25);
}

.brand-details {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text-primary);
  line-height: 1.2;
  transition: color var(--transition-fast);
}

.brand-tag {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.2px;
}

.mobile-close-btn {
  display: none;
  padding: 4px;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
}

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

/* Sidebar Actions */
.sidebar-actions {
  padding: 14px 12px 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.btn-new-session {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 8px 14px;
  background-color: var(--primary-accent);
  color: #ffffff;
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
  box-shadow: 0 1px 2px rgba(79, 70, 229, 0.2);
}

.btn-new-session:hover {
  background-color: var(--primary-hover);
}

.btn-new-session:active {
  transform: scale(0.99);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  position: relative;
}

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

.nav-item.active {
  background-color: var(--accent-light);
  color: var(--primary-accent);
}

.nav-item-icon {
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-indicator-dot {
  margin-left: auto;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--primary-accent);
  display: none;
}

.nav-indicator-dot.active {
  display: block;
}

/* Recent Prompts Section */
.sidebar-section {
  flex: 1;
  overflow-y: auto;
  padding: 12px 12px 6px;
  display: flex;
  flex-direction: column;
}

.sidebar-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 4px 8px;
}

.sidebar-section-title {
  font-size: 11.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
}

.btn-ghost-sm {
  font-size: 11px;
  color: var(--text-muted);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.btn-ghost-sm:hover {
  background-color: var(--bg-subtle);
  color: var(--text-secondary);
}

.recent-sessions-list {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.recent-session-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  font-size: 12.5px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
}

.recent-session-item:hover {
  background-color: var(--bg-subtle);
  color: var(--text-primary);
}

.recent-session-item.active {
  background-color: var(--accent-light);
  color: var(--primary-accent);
  font-weight: 500;
}

.recent-session-title {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
  margin-right: 6px;
}

.recent-item-delete {
  opacity: 0;
  padding: 2px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  transition: opacity var(--transition-fast), color var(--transition-fast);
}

.recent-session-item:hover .recent-item-delete {
  opacity: 1;
}

.recent-item-delete:hover {
  color: var(--danger-color);
}

.recent-empty-state {
  font-size: 12px;
  color: var(--text-muted);
  padding: 16px 8px;
  text-align: center;
}

/* Sidebar Footer */
.sidebar-footer {
  padding: 12px 12px 16px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.system-status-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  font-size: 12px;
  color: var(--text-secondary);
}

.status-pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--success-color);
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
}

.footer-nav {
  display: flex;
  gap: 6px;
}

.footer-nav-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  background-color: var(--bg-subtle);
  transition: all var(--transition-fast);
}

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

/* ==========================================================================
   Main Workspace
   ========================================================================== */

.main-workspace {
  flex: 1;
  height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-app);
  position: relative;
  overflow: hidden;
  min-width: 0;
}

/* Mobile Topbar */
.mobile-topbar {
  display: none;
  height: 52px;
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  padding: 0 14px;
  align-items: center;
  justify-content: space-between;
  z-index: 30;
}

.mobile-icon-btn {
  padding: 6px;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-brand {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 16px;
}

.mobile-brand-glyph {
  color: var(--primary-accent);
}

/* Workspace Top Header */
.workspace-header {
  height: var(--header-height);
  background-color: var(--bg-app);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.breadcrumb-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
}

.breadcrumb-root {
  font-weight: 600;
  color: var(--text-primary);
}

.breadcrumb-separator {
  color: var(--text-muted);
}

.breadcrumb-current {
  color: var(--text-secondary);
  font-weight: 500;
}

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

.session-state-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.2px;
}

.state-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--primary-accent);
}

.btn-inspector-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--text-secondary);
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

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

.btn-inspector-toggle.active {
  background-color: var(--accent-light);
  border-color: var(--accent-border);
  color: var(--primary-accent);
}

/* ==========================================================================
   Central Scroll Area
   ========================================================================== */

.interaction-scroll-area {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  scroll-behavior: smooth;
  width: 100%;
  max-width: 100%;
}

/* ==========================================================================
   SCREEN 1: HERO SECTION
   ========================================================================== */

.hero-section {
  max-width: 860px;
  width: 100%;
  margin: 0 auto;
  padding: 48px 24px 60px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  box-sizing: border-box;
}

.hero-content {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  border-radius: var(--radius-full);
  background: var(--accent-light);
  border: 1px solid var(--accent-border);
  color: var(--primary-accent);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary-accent);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.2);
}

.hero-headline {
  font-size: 38px;
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -0.8px;
  color: var(--text-primary);
  margin-bottom: 16px;
  max-width: 760px;
}

.hero-headline-accent {
  background: linear-gradient(135deg, var(--primary-accent), #7c3aed);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subheadline {
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-secondary);
  max-width: 620px;
  margin-bottom: 36px;
}

/* Hero Input Card */
.hero-input-card {
  width: 100%;
  max-width: 720px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 20px 24px;
  box-shadow: var(--shadow-hero);
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-align: left;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.hero-input-card:focus-within {
  border-color: var(--primary-accent);
  box-shadow: 0 10px 30px -5px rgba(79, 70, 229, 0.15), 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.input-card-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.input-card-label {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
}

.input-card-hint {
  font-size: 12px;
  color: var(--text-muted);
}

.input-textarea-wrapper {
  width: 100%;
}

.hero-textarea {
  width: 100%;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  font-size: 15px;
  line-height: 1.5;
  color: var(--text-primary);
  background-color: #fafbfc;
  resize: none;
  outline: none;
  box-sizing: border-box;
  transition: all var(--transition-fast);
}

.hero-textarea:focus {
  background-color: #ffffff;
  border-color: var(--border-focus);
}

.hero-textarea::placeholder {
  color: var(--text-muted);
}

.input-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 4px;
}

.input-features-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-secondary);
}

.pill-sparkle {
  color: var(--primary-accent);
  font-weight: bold;
}

.btn-build-prompt {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  background: linear-gradient(135deg, var(--primary-accent), #4338ca);
  color: #ffffff;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.28);
  transition: all var(--transition-fast);
}

.btn-build-prompt:hover {
  background: linear-gradient(135deg, #4338ca, #3730a3);
  box-shadow: 0 6px 16px rgba(79, 70, 229, 0.35);
  transform: translateY(-1px);
}

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

.btn-build-prompt svg {
  transition: transform var(--transition-fast);
}

.btn-build-prompt:hover svg {
  transform: translateX(3px);
}

/* Starter Idea Chips */
.starter-ideas-container {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.starter-label {
  font-size: 12.5px;
  font-weight: 500;
  color: var(--text-muted);
}

.starter-chips-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  max-width: 720px;
}

.starter-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  box-shadow: var(--shadow-subtle);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.starter-chip:hover {
  border-color: var(--primary-accent);
  color: var(--primary-accent);
  background-color: var(--accent-light);
  transform: translateY(-1px);
}

.chip-icon {
  font-size: 14px;
}

/* ==========================================================================
   SCREEN 2: ADAPTIVE WORKSPACE
   ========================================================================== */

.builder-workspace {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px 28px 48px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  box-sizing: border-box;
}

/* Active Query Banner */
.active-query-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 10px 16px;
  box-shadow: var(--shadow-subtle);
}

.query-bar-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  text-transform: uppercase;
}

.query-bar-text {
  flex: 1;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.btn-start-over-sm {
  font-size: 12px;
  color: var(--text-secondary);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background-color: var(--bg-subtle);
  transition: all var(--transition-fast);
}

.btn-start-over-sm:hover {
  background-color: var(--border-color);
  color: var(--text-primary);
}

/* Builder Layout Grid */
.builder-layout-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 24px;
  align-items: start;
}

.builder-left-col {
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-width: 0;
}

.builder-right-col {
  min-width: 0;
}

/* State A: Analyzing Card */
.analyzing-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 16px;
  box-shadow: var(--shadow-card);
}

.analyzing-spinner {
  position: relative;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.spinner-ring {
  position: absolute;
  inset: 0;
  border: 3px solid var(--accent-light);
  border-top-color: var(--primary-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.spinner-glyph {
  font-size: 20px;
  color: var(--primary-accent);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.analyzing-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
}

.analyzing-desc {
  font-size: 13.5px;
  color: var(--text-secondary);
}

/* State B: Active Question Card */
.active-question-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 26px 28px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 16px;
  animation: fadeIn 0.2s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

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

.question-step-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--primary-accent);
  text-transform: uppercase;
}

.step-indicator-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--primary-accent);
}

.question-domain-tag {
  font-size: 11.5px;
  font-weight: 600;
  padding: 3px 8px;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
}

.question-title {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.3px;
  line-height: 1.35;
  color: var(--text-primary);
}

.question-subtitle {
  font-size: 13.5px;
  color: var(--text-secondary);
  margin-top: -6px;
}

/* Options Container */
.options-container {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 6px;
}

/* Option Choice Button */
.option-choice-btn {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 16px;
  background-color: #ffffff;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  text-align: left;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.option-choice-btn:hover {
  border-color: var(--primary-accent);
  background-color: #fbfcff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-subtle);
}

.option-choice-btn.selected {
  border-color: var(--primary-accent);
  background-color: var(--accent-light);
}

.option-choice-indicator {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1.5px solid var(--border-color);
  background-color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
  transition: all var(--transition-fast);
}

.option-choice-btn:hover .option-choice-indicator {
  border-color: var(--primary-accent);
}

.option-choice-btn.selected .option-choice-indicator {
  border-color: var(--primary-accent);
  background-color: var(--primary-accent);
}

.option-choice-indicator.checkbox {
  border-radius: 4px;
}

.option-choice-indicator-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #ffffff;
  opacity: 0;
  transform: scale(0);
  transition: all var(--transition-fast);
}

.option-choice-btn.selected .option-choice-indicator-dot {
  opacity: 1;
  transform: scale(1);
}

.option-choice-text-wrap {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.option-choice-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.option-choice-desc {
  font-size: 12.5px;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* Yes / No Option Row */
.yes-no-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.btn-yes-no {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  background-color: #ffffff;
  transition: all var(--transition-fast);
}

.btn-yes-no:hover {
  border-color: var(--primary-accent);
  background-color: var(--accent-light);
  color: var(--primary-accent);
}

/* Scale 3-way Option Grid */
.scale-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.btn-scale-option {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 14px 10px;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: #ffffff;
  text-align: center;
  gap: 4px;
  transition: all var(--transition-fast);
}

.btn-scale-option:hover {
  border-color: var(--primary-accent);
  background-color: var(--accent-light);
}

.scale-label {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-primary);
}

.scale-desc {
  font-size: 11.5px;
  color: var(--text-secondary);
}

/* Inline Custom Input */
.custom-input-inline {
  display: flex;
  gap: 8px;
  margin-top: 8px;
  animation: fadeIn 0.15s ease-out;
}

.custom-inline-input {
  flex: 1;
  padding: 10px 14px;
  border: 1.5px solid var(--primary-accent);
  border-radius: var(--radius-md);
  font-size: 14px;
  outline: none;
  background-color: #ffffff;
}

.btn-submit-custom {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  background-color: var(--primary-accent);
  color: #ffffff;
  font-size: 13.5px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.btn-submit-custom:hover {
  background-color: var(--primary-hover);
}

/* Multi-Choice Confirmation Row */
.multi-confirm-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  background-color: var(--bg-subtle);
  border-radius: var(--radius-md);
  margin-top: 8px;
}

.multi-hint {
  font-size: 12.5px;
  font-weight: 500;
  color: var(--text-secondary);
}

.btn-confirm-multi {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  background-color: var(--primary-accent);
  color: #ffffff;
  font-size: 13.5px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.btn-confirm-multi:hover {
  background-color: var(--primary-hover);
}

/* Auxiliary Question Actions */
.question-actions-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 8px;
  border-top: 1px solid var(--border-subtle);
}

.btn-auxiliary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-muted);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.btn-auxiliary:hover {
  color: var(--text-secondary);
  background-color: var(--bg-subtle);
}

.aux-icon {
  font-size: 12px;
}

/* State C: Question-Set AdSlot */
.ad-slot-card {
  background: linear-gradient(180deg, #ffffff 0%, #fafbfc 100%);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px 26px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 16px;
  animation: fadeIn 0.2s ease-out;
}

.ad-badge-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.ad-badge {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.6px;
  color: var(--text-muted);
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  padding: 2px 6px;
  border-radius: 3px;
}

.ad-sponsor-label {
  font-size: 11.5px;
  font-weight: 500;
  color: var(--text-muted);
}

.ad-content-box {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 12px 14px;
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

.ad-partner-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #00e599, #00a3ff);
  color: #000000;
  font-size: 18px;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.ad-partner-details {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.ad-partner-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
}

.ad-partner-copy {
  font-size: 12.5px;
  color: var(--text-secondary);
  line-height: 1.45;
}

.ad-partner-link {
  font-size: 12px;
  font-weight: 600;
  color: var(--primary-accent);
  margin-top: 4px;
  display: inline-flex;
}

.ad-partner-link:hover {
  text-decoration: underline;
}

.ad-action-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding-top: 6px;
}

.ad-set-note {
  font-size: 12px;
  color: var(--text-secondary);
  font-weight: 500;
}

.btn-continue-ad {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background-color: var(--primary-accent);
  color: #ffffff;
  font-size: 13.5px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.btn-continue-ad:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
}

/* State D: Completion Card */
.completion-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 30px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 20px;
  animation: fadeIn 0.25s ease-out;
}

.completion-header {
  display: flex;
  align-items: center;
  gap: 16px;
}

.completion-check-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--success-light);
  color: var(--success-text);
  font-size: 22px;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.15);
}

.completion-titles {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.completion-title {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.4px;
  color: var(--text-primary);
}

.completion-subtitle {
  font-size: 13.5px;
  color: var(--text-secondary);
}

.final-prompt-box-card {
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: #fafbfc;
  overflow: hidden;
}

.final-prompt-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  background-color: #ffffff;
  border-bottom: 1px solid var(--border-subtle);
}

.final-prompt-tag {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--text-muted);
}

.btn-copy-action {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary-accent);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  background-color: var(--accent-light);
  transition: all var(--transition-fast);
}

.btn-copy-action:hover {
  background-color: #e0e7ff;
}

.final-prompt-code {
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-primary);
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 380px;
  overflow-y: auto;
}

.completion-actions-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.btn-completion-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background-color: var(--primary-accent);
  color: #ffffff;
  font-size: 13.5px;
  font-weight: 600;
  border-radius: var(--radius-md);
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.25);
  transition: all var(--transition-fast);
}

.btn-completion-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
}

.btn-completion-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 13.5px;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

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

.execution-output-card {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: #ffffff;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

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

.execution-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
}

.execution-body {
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-secondary);
  max-height: 250px;
  overflow-y: auto;
  white-space: pre-wrap;
}

/* ==========================================================================
   STICKY LIVE PROMPT PREVIEW PANEL
   ========================================================================== */

.live-preview-panel {
  position: sticky;
  top: 20px;
  background-color: var(--bg-card);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.live-status-badge {
  display: flex;
  align-items: center;
  gap: 8px;
}

.live-pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--primary-accent);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.2);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(79, 70, 229, 0.4); }
  70% { box-shadow: 0 0 0 6px rgba(79, 70, 229, 0); }
  100% { box-shadow: 0 0 0 0 rgba(79, 70, 229, 0); }
}

.live-title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.6px;
  color: var(--text-primary);
  text-transform: uppercase;
}

.collected-count-badge {
  font-size: 11.5px;
  font-weight: 600;
  color: var(--primary-accent);
  background-color: var(--accent-light);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

/* Quality Meter */
.quality-meter-box {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.quality-meter-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}

.quality-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
}

.quality-percentage {
  font-size: 13px;
  font-weight: 700;
  color: var(--primary-accent);
  font-family: var(--font-mono);
}

.quality-progress-track {
  height: 6px;
  background-color: var(--bg-subtle);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.quality-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-accent), #06b6d4, var(--success-color));
  border-radius: var(--radius-full);
  transition: width 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Live Prompt Card */
.live-prompt-card {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: #fafbfc;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: box-shadow var(--transition-fast);
}

.live-prompt-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background-color: #ffffff;
  border-bottom: 1px solid var(--border-subtle);
}

.live-hint-text {
  font-size: 11px;
  color: var(--text-muted);
}

.btn-copy-preview {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-subtle);
  transition: all var(--transition-fast);
}

.btn-copy-preview:hover {
  background-color: var(--border-color);
  color: var(--text-primary);
}

.live-prompt-content {
  padding: 14px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-primary);
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 140px;
  max-height: 320px;
  overflow-y: auto;
  transition: background-color 0.3s ease;
}

/* Update flash effect */
.live-prompt-content.prompt-flash {
  animation: promptFlash 0.6s ease-out;
}

@keyframes promptFlash {
  0% { background-color: rgba(79, 70, 229, 0.15); }
  100% { background-color: transparent; }
}

/* Collected Tags */
.collected-tags-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.tags-header {
  font-size: 11.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  color: var(--text-muted);
}

.tags-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.spec-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 500;
  color: var(--text-secondary);
  animation: fadeIn 0.2s ease-out;
}

.spec-tag-key {
  color: var(--text-muted);
}

.spec-tag-val {
  font-weight: 600;
  color: var(--text-primary);
}

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

/* ==========================================================================
   Right Inspector Panel
   ========================================================================== */

.inspector-panel {
  position: fixed;
  right: 0;
  top: 0;
  width: var(--inspector-width);
  min-width: var(--inspector-width);
  height: 100vh;
  background-color: var(--bg-card);
  border-left: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  z-index: 50;
  box-shadow: -4px 0 24px rgba(15, 23, 42, 0.12);
  transform: translateX(100%);
  transition: transform var(--transition-normal);
}

.inspector-panel.open {
  transform: translateX(0);
}

.inspector-close-btn {
  display: block;
  padding: 4px;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
}

.inspector-header {
  padding: 16px 18px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
}

.inspector-title-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

.inspector-badge-icon {
  color: var(--primary-accent);
  display: flex;
  align-items: center;
}

.inspector-title {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--text-primary);
}

.inspector-header-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.inspector-status-pill {
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.5px;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  background-color: var(--bg-subtle);
  color: var(--text-secondary);
}

.inspector-status-pill.active {
  background-color: var(--accent-light);
  color: var(--primary-accent);
}

.inspector-status-pill.completed {
  background-color: var(--success-light);
  color: var(--success-text);
}

.inspector-close-btn {
  display: none;
  padding: 2px;
  color: var(--text-secondary);
}

.inspector-content {
  flex: 1;
  overflow-y: auto;
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.inspector-card-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.inspector-section-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
}

.state-indicator-badge {
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 600;
  padding: 6px 10px;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
}

.progress-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.progress-count {
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text-secondary);
}

.progress-bar-track {
  height: 6px;
  background-color: var(--bg-subtle);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background-color: var(--primary-accent);
  border-radius: var(--radius-full);
  transition: width 0.3s ease;
}

.context-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.context-details-count {
  font-size: 11.5px;
  font-weight: 600;
  color: var(--primary-accent);
}

.structured-context-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.context-item {
  padding: 8px 10px;
  background-color: var(--bg-subtle);
  border-radius: var(--radius-sm);
  font-size: 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.context-item-key {
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 11px;
  text-transform: capitalize;
}

.context-item-val {
  color: var(--text-primary);
  word-break: break-word;
}

.context-empty-item {
  font-size: 12px;
  color: var(--text-muted);
  font-style: italic;
  padding: 4px 0;
}

.raw-json-details {
  margin-top: 4px;
}

.raw-json-summary {
  font-size: 11.5px;
  font-weight: 500;
  color: var(--primary-accent);
  cursor: pointer;
  outline: none;
}

.code-block {
  margin-top: 8px;
  padding: 10px;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
  color: var(--text-primary);
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 180px;
  overflow-y: auto;
}

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

.btn-copy-prompt {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  color: var(--primary-accent);
  background-color: var(--accent-light);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.btn-copy-prompt:hover {
  background-color: #e0e7ff;
}

.optimized-prompt-box {
  padding: 10px 12px;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.55;
  color: var(--text-secondary);
  white-space: pre-wrap;
  max-height: 200px;
  overflow-y: auto;
}

/* ==========================================================================
   Modals (Settings & About)
   ========================================================================== */

.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.4);
  backdrop-filter: blur(2px);
  z-index: 60;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.modal-dialog {
  background-color: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-modal);
  width: 100%;
  max-width: 460px;
  overflow: hidden;
  animation: modalSlide 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalSlide {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

.modal-close-btn {
  font-size: 16px;
  color: var(--text-muted);
  padding: 4px;
}

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

.modal-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.setting-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.setting-label {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-primary);
}

.setting-desc {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.4;
}

.setting-slider-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 6px;
}

.slider-input {
  flex: 1;
  accent-color: var(--primary-accent);
}

.slider-val {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  background-color: var(--bg-subtle);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.btn-danger-outline {
  align-self: flex-start;
  margin-top: 6px;
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 500;
  color: var(--danger-color);
  border: 1px solid var(--danger-color);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.btn-danger-outline:hover {
  background-color: var(--danger-light);
}

.about-text {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.about-list {
  padding-left: 18px;
  font-size: 12.5px;
  color: var(--text-secondary);
  line-height: 1.5;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.about-meta {
  margin-top: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--text-muted);
}

.modal-footer {
  padding: 12px 20px;
  background-color: var(--bg-app);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: flex-end;
}

.btn-primary-sm {
  padding: 6px 16px;
  background-color: var(--primary-accent);
  color: #ffffff;
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.btn-primary-sm:hover {
  background-color: var(--primary-hover);
}

/* ==========================================================================
   Toast Notifications
   ========================================================================== */

.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast-item {
  background-color: var(--text-primary);
  color: #ffffff;
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-size: 12.5px;
  font-weight: 500;
  box-shadow: var(--shadow-float);
  display: flex;
  align-items: center;
  gap: 8px;
  pointer-events: auto;
  animation: toastSlideIn 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.toast-item.fade-out {
  opacity: 0;
  transform: translateY(6px);
}

@keyframes toastSlideIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Responsive Adaptations
   ========================================================================== */

/* Laptops / Smaller Desktops (<= 1200px) */
@media (max-width: 1200px) {
  .inspector-panel {
    position: fixed;
    right: 0;
    top: 0;
    transform: translateX(100%);
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.08);
  }

  .inspector-panel.open {
    transform: translateX(0);
  }

  .inspector-close-btn {
    display: block;
  }
}

/* Tablet & Mobile (<= 960px): Stack Layout */
@media (max-width: 960px) {
  .builder-layout-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .live-preview-panel {
    position: static;
  }

  .hero-headline {
    font-size: 30px;
  }

  .hero-subheadline {
    font-size: 14.5px;
  }
}

/* Mobile Screens (<= 860px) */
@media (max-width: 860px) {
  .mobile-topbar {
    display: flex;
  }

  .workspace-header {
    display: none;
  }

  .app-sidebar {
    position: fixed;
    left: 0;
    top: 0;
    transform: translateX(-100%);
    box-shadow: 4px 0 20px rgba(0, 0, 0, 0.08);
  }

  .app-sidebar.open {
    transform: translateX(0);
  }

  .mobile-close-btn {
    display: block;
  }

  .hero-section {
    padding: 32px 16px 40px;
  }

  .hero-input-card {
    padding: 16px 18px;
  }

  .builder-workspace {
    padding: 16px 14px 32px;
  }
}

/* Small Mobile (<= 480px) */
@media (max-width: 480px) {
  .app-sidebar {
    width: 280px;
  }

  .inspector-panel {
    width: 100vw;
  }

  .hero-headline {
    font-size: 25px;
  }

  .yes-no-grid {
    grid-template-columns: 1fr;
  }

  .scale-grid {
    grid-template-columns: 1fr;
  }

  .input-card-footer {
    flex-direction: column;
    align-items: stretch;
  }

  .btn-build-prompt {
    justify-content: center;
  }
}