/* 
   Harmonies of Your Story — Premium Stylesheet
   Designed with rich aesthetics, curated theme palettes, glassmorphism, 
   smooth cubic-bezier transitions, and highly responsive components.
*/

/* ==========================================
   1. DESIGN TOKENS & SYSTEM ROOT VARIABLES
   ========================================== */
:root {
  /* Fonts */
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'Outfit', monospace;

  /* Global Animations & Transitions */
  --transition-slow: all 0.8s cubic-bezier(0.25, 1, 0.5, 1);
  --transition-medium: all 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-fast: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --bounce-easing: cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* ==========================================
   2. CURATED VISUAL THEMES (HSL PALETTES)
   ========================================== */

/* Theme 1: Elegant Professional (Default) - Sophisticated, Editorial, Warm Champagne & Ivory */
.theme-elegant {
  --bg-app: HSL(36, 33%, 97%);
  --bg-card: hsla(36, 25%, 94%, 0.7);
  --bg-card-solid: HSL(36, 25%, 94%);
  --border-color: hsla(36, 15%, 80%, 0.5);
  --border-color-focus: HSL(36, 25%, 55%);
  --text-main: HSL(210, 24%, 16%);
  --text-muted: HSL(210, 10%, 40%);
  --accent-color: HSL(36, 35%, 48%);
  --accent-rgb: 165, 124, 63;
  --accent-glow: hsla(36, 40%, 48%, 0.15);
  --card-shadow: 0 16px 40px -10px hsla(210, 20%, 30%, 0.08);
  --vibe-gradient: linear-gradient(135deg, HSL(36, 35%, 48%) 0%, HSL(25, 45%, 45%) 100%);
  --input-bg: hsla(0, 0%, 100%, 0.8);
  --kbd-bg: HSL(36, 10%, 88%);
}

/* Theme 2: Cinematic Moody - Dark Widescreen, Mystical Shadows, Amber Glows */
.theme-cinematic {
  --bg-app: HSL(220, 16%, 6%);
  --bg-card: hsla(220, 12%, 11%, 0.65);
  --bg-card-solid: HSL(220, 12%, 11%);
  --border-color: hsla(220, 10%, 25%, 0.4);
  --border-color-focus: HSL(35, 80%, 55%);
  --text-main: HSL(220, 14%, 90%);
  --text-muted: HSL(220, 10%, 60%);
  --accent-color: HSL(35, 85%, 50%);
  --accent-rgb: 236, 151, 19;
  --accent-glow: hsla(35, 85%, 50%, 0.25);
  --card-shadow: 0 20px 50px -15px rgba(0, 0, 0, 0.7);
  --vibe-gradient: linear-gradient(135deg, HSL(35, 85%, 50%) 0%, HSL(15, 80%, 45%) 100%);
  --input-bg: hsla(220, 12%, 8%, 0.7);
  --kbd-bg: HSL(220, 12%, 20%);
}

/* Theme 3: Romantic Pastel - Warm Cream, Soft Dusty Rose, Dreamy Curves */
.theme-romantic {
  --bg-app: HSL(10, 45%, 98%);
  --bg-card: hsla(350, 40%, 95%, 0.75);
  --bg-card-solid: HSL(350, 40%, 95%);
  --border-color: hsla(350, 30%, 85%, 0.6);
  --border-color-focus: HSL(350, 40%, 65%);
  --text-main: HSL(345, 30%, 20%);
  --text-muted: HSL(345, 15%, 45%);
  --accent-color: HSL(350, 45%, 60%);
  --accent-rgb: 214, 115, 131;
  --accent-glow: hsla(350, 45%, 60%, 0.2);
  --card-shadow: 0 16px 36px -12px hsla(350, 30%, 50%, 0.1);
  --vibe-gradient: linear-gradient(135deg, HSL(350, 45%, 60%) 0%, HSL(330, 35%, 55%) 100%);
  --input-bg: hsla(0, 0%, 100%, 0.85);
  --kbd-bg: HSL(350, 20%, 90%);
}

/* Theme 4: Indie Whimsical - Organic Forest, Energetic Mustard, Bouncy Curves */
.theme-whimsical {
  --bg-app: HSL(140, 20%, 94%);
  --bg-card: hsla(140, 25%, 88%, 0.7);
  --bg-card-solid: HSL(140, 25%, 88%);
  --border-color: hsla(140, 15%, 70%, 0.5);
  --border-color-focus: HSL(42, 85%, 45%);
  --text-main: HSL(150, 30%, 12%);
  --text-muted: HSL(150, 15%, 32%);
  --accent-color: HSL(42, 85%, 45%);
  --accent-rgb: 212, 148, 18;
  --accent-glow: hsla(42, 85%, 45%, 0.2);
  --card-shadow: 0 12px 30px -8px hsla(150, 25%, 20%, 0.1);
  --vibe-gradient: linear-gradient(135deg, HSL(145, 30%, 28%) 0%, HSL(42, 85%, 45%) 100%);
  --input-bg: hsla(0, 0%, 100%, 0.85);
  --kbd-bg: HSL(140, 15%, 80%);
}

/* ==========================================
   3. BASE RESET & SCROLLBAR
   ========================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  color: var(--text-main);
  background-color: var(--bg-app);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: var(--transition-slow);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Custom Premium Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-app);
}
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-color);
}

/* ==========================================
   4. BACKGROUND INTEGRATION (CANVAS)
   ========================================== */
#ambient-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
  transition: var(--transition-slow);
}

/* ==========================================
   5. LAYOUT: APP HEADER & BRANDING
   ========================================== */
.app-header {
  width: 90%;
  max-width: 1100px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 2rem;
  z-index: 10;
  gap: 1.5rem;
}

.brand {
  user-select: none;
  animation: float 6s ease-in-out infinite;
}

.brand-subtitle {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 600;
  display: block;
  margin-bottom: 0.25rem;
}

.brand-title {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

/* ==========================================
   6. APP CONTROLS (THEME & DUAL MODE)
   ========================================== */
.controls-panel {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0.6rem 1.2rem;
  border-radius: 50px;
}

.theme-control, .author-control {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.theme-control::after {
  content: "";
  height: 20px;
  width: 1px;
  background-color: var(--border-color);
  margin-left: 0.75rem;
}

.panel-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.theme-select {
  background: var(--input-bg);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 0.4rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  outline: none;
  transition: var(--transition-fast);
}

.theme-select:hover, .theme-select:focus {
  border-color: var(--border-color-focus);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.toggle-switch-wrapper {
  display: flex;
  background: var(--input-bg);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 2px;
  position: relative;
}

.toggle-btn {
  background: transparent;
  border: none;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 0.35rem 0.9rem;
  border-radius: 18px;
  cursor: pointer;
  z-index: 1;
  transition: var(--transition-fast);
}

.toggle-btn.active {
  color: var(--text-main);
  background: var(--bg-card-solid);
  font-weight: 600;
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}

.theme-whimsical .toggle-btn.active {
  animation: bounce 0.4s var(--bounce-easing);
}

/* ==========================================
   7. GLASSMORPHISM COMMON LAYOUT CARDS
   ========================================== */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  box-shadow: var(--card-shadow);
  transition: var(--transition-medium);
}

.glass-card:hover {
  border-color: var(--border-color-focus);
}

/* ==========================================
   8. AMBIENT AUDIO DASHBOARD
   ========================================== */
.audio-dashboard {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 100;
  padding: 0.6rem 1.2rem;
  border-radius: 50px;
  display: flex;
  align-items: center;
  max-width: 450px;
}

.audio-control-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 100%;
}

.audio-toggle-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: transparent;
  border: none;
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  outline: none;
}

.audio-icon {
  fill: currentColor;
  transition: var(--transition-fast);
}

.audio-icon.playing {
  color: var(--accent-color);
  animation: pulse-glow 1.5s ease-in-out infinite;
}

.audio-label {
  white-space: nowrap;
}

.audio-selector-wrapper {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  animation: slideInRight 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.volume-slider-container {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding-left: 0.5rem;
  border-left: 1px solid var(--border-color);
}

.volume-icon {
  color: var(--text-muted);
}

#audio-volume {
  width: 60px;
  height: 4px;
  accent-color: var(--accent-color);
  cursor: pointer;
}

/* ==========================================
   9. PROGRESS SYSTEM (BAR & DOTS)
   ========================================== */
.progress-bar-container {
  width: 90%;
  max-width: 800px;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  z-index: 10;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.progress-bar-bg {
  width: 100%;
  height: 5px;
  background: var(--border-color);
  border-radius: 10px;
  overflow: hidden;
  position: relative;
}

.progress-bar-fill {
  height: 100%;
  background: var(--vibe-gradient);
  border-radius: 10px;
  width: 0%;
  transition: width 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.sections-indicator-row {
  display: flex;
  justify-content: space-between;
  width: 100%;
}

.section-dot {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  cursor: pointer;
  flex: 1;
}

.section-dot-node {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border-color);
  border: 2px solid var(--bg-app);
  z-index: 2;
  transition: var(--transition-fast);
}

.section-dot:hover .section-dot-node {
  transform: scale(1.3);
  background: var(--border-color-focus);
}

.section-dot.active .section-dot-node {
  background: var(--accent-color);
  transform: scale(1.4);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.section-dot.completed .section-dot-node {
  background: var(--accent-color);
  box-shadow: 0 0 0 2px var(--accent-glow);
}

.section-dot-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-top: 0.4rem;
  text-align: center;
  transition: var(--transition-fast);
  white-space: nowrap;
  opacity: 0.7;
}

.section-dot.active .section-dot-label {
  color: var(--text-main);
  font-weight: 800;
  opacity: 1;
}

/* ==========================================
   10. MAIN CARD AND LAYOUT CONTAINERS
   ========================================== */
.survey-container {
  width: 90%;
  max-width: 800px;
  margin-top: 1rem;
  margin-bottom: 5rem;
  flex-grow: 1;
  position: relative;
  display: flex;
  flex-direction: column;
  z-index: 10;
}

.survey-card {
  display: none;
  flex-direction: column;
  width: 100%;
  background: var(--bg-card);
  backdrop-filter: blur(25px) saturate(170%);
  -webkit-backdrop-filter: blur(25px) saturate(170%);
  border: 1px solid var(--border-color);
  border-radius: 32px;
  box-shadow: var(--card-shadow);
  padding: 3rem;
  /* Only transition background, border, shadow, and backdrop filter to prevent transition engine interfering with translation keyframes */
  transition: background var(--transition-slow), border-color var(--transition-slow), box-shadow var(--transition-slow), backdrop-filter var(--transition-slow), -webkit-backdrop-filter var(--transition-slow);
}

.survey-card.active {
  display: flex;
}

#screen-welcome.active,
#screen-review.active {
  animation: slideInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Custom rounding styles for romantic and whimsical themes */
.theme-romantic .survey-card, 
.theme-romantic .glass-card,
.theme-romantic .theme-select,
.theme-romantic .toggle-btn,
.theme-romantic .vibe-card {
  border-radius: 40px;
}

.theme-whimsical .survey-card, 
.theme-whimsical .glass-card,
.theme-whimsical .theme-select,
.theme-whimsical .toggle-btn,
.theme-whimsical .vibe-card {
  border-radius: 16px;
  box-shadow: 6px 6px 0px var(--border-color-focus);
}

/* ==========================================
   11. SCREEN 1: WELCOME SCREEN STYLING
   ========================================== */
.welcome-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.vibe-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-color);
  background: var(--accent-glow);
  padding: 0.4rem 1.2rem;
  border-radius: 50px;
  border: 1px solid var(--border-color);
  display: inline-block;
  letter-spacing: 0.15em;
  margin-bottom: 1.5rem;
}

.serif-title {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  line-height: 1.2;
  font-weight: 700;
  color: var(--text-main);
  max-width: 650px;
  margin-bottom: 1.5rem;
}

.theme-cinematic .serif-title {
  text-shadow: 0 0 15px rgba(236, 151, 19, 0.15);
}

.welcome-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 600px;
  margin-bottom: 2rem;
}

.welcome-accent-note {
  background: var(--bg-app);
  border-left: 3px solid var(--accent-color);
  padding: 1rem 1.5rem;
  border-radius: 0 16px 16px 0;
  text-align: left;
  margin-bottom: 2.5rem;
  font-size: 0.95rem;
  max-width: 600px;
}

.welcome-accent-note p {
  margin-bottom: 0.5rem;
  color: var(--text-muted);
}
.welcome-accent-note p:last-child {
  margin-bottom: 0;
}

/* Setup sections */
.setup-subtitle {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 1.5rem;
  position: relative;
  display: inline-block;
}

.setup-vibe-selection {
  width: 100%;
  margin-bottom: 2.5rem;
}

.vibe-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  width: 100%;
}

.vibe-card {
  background: var(--input-bg);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 1.2rem 1rem;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: var(--transition-medium);
  outline: none;
}

.vibe-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-color-focus);
  box-shadow: 0 10px 20px -5px var(--accent-glow);
}

.vibe-card.active {
  background: var(--bg-card-solid);
  border-color: var(--border-color-focus);
  box-shadow: 0 12px 25px -5px var(--accent-glow), 0 0 0 2px var(--accent-color);
}

.vibe-card-visual {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  margin-bottom: 0.8rem;
  position: relative;
  overflow: hidden;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.1);
}

.cinematic-visual { background: linear-gradient(135deg, #1a2a6c, #b21f1f, #fdbb2d); }
.warm-visual { background: linear-gradient(135deg, #F3904F, #3B4371); }
.intimate-visual { background: linear-gradient(135deg, #e65c00, #F9D423); }
.indie-visual { background: linear-gradient(135deg, #11998e, #38ef7d); }

.vibe-card-title {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-main);
  margin-bottom: 0.25rem;
}

.vibe-card-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.3;
}

/* Couple names inputs */
.couple-names-form {
  width: 100%;
  max-width: 600px;
  padding: 1.5rem;
  margin-bottom: 2.5rem;
}

.names-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.input-group {
  display: flex;
  flex-direction: column;
  text-align: left;
  gap: 0.5rem;
}

.input-group label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
}

.input-group input {
  background: var(--input-bg);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  border-radius: 12px;
  padding: 0.75rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition-fast);
}

.input-group input:focus {
  border-color: var(--border-color-focus);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* ==========================================
   12. SCREEN 2: DYNAMIC QUESTION STAGE
   ========================================== */
.question-stage-wrapper {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  width: 100%;
}

.question-header {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  text-align: left;
}

.question-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--accent-color);
  letter-spacing: 0.1em;
  background: var(--accent-glow);
  padding: 0.2rem 0.8rem;
  border-radius: 12px;
}

.question-index {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
}

.serif-question-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  line-height: 1.3;
  font-weight: 700;
  color: var(--text-main);
}

.question-subtext {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-style: italic;
  opacity: 0.9;
}

/* Textboxes & Answers Area */
.answers-area {
  width: 100%;
}

.input-wrapper {
  width: 100%;
  position: relative;
}

.story-textbox {
  width: 100%;
  height: 160px;
  background: var(--input-bg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  color: var(--text-main);
  padding: 1.2rem;
  font-family: var(--font-sans);
  font-size: 1.05rem;
  line-height: 1.6;
  outline: none;
  resize: vertical;
  transition: var(--transition-medium);
}

.story-textbox:focus {
  border-color: var(--border-color-focus);
  box-shadow: 0 8px 30px -5px var(--accent-glow), inset 0 2px 4px rgba(0,0,0,0.02);
  transform: translateY(-2px);
}

.character-count {
  position: absolute;
  bottom: 0.8rem;
  right: 1rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  pointer-events: none;
  opacity: 0.8;
}

/* Split Column Side-by-Side responses */
.split-answers-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  width: 100%;
  animation: slideInDown 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.split-column {
  padding: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: relative;
}

.partner-column-header {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.partner-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent-glow);
  border: 1px solid var(--border-color-focus);
  color: var(--accent-color);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  text-transform: uppercase;
}

.partner-label-name {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-main);
}

.split-textbox {
  height: 180px;
  background: hsla(0, 0%, 100%, 0.4);
}

.theme-cinematic .split-textbox {
  background: rgba(220, 12, 11, 0.2);
}

/* Help overlays */
.interaction-tip {
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
  padding: 1rem 1.2rem;
  border-radius: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
  animation: fadeIn 0.5s ease-in forwards;
}

.tip-icon {
  color: var(--accent-color);
  flex-shrink: 0;
  margin-top: 2px;
}

.tip-text {
  line-height: 1.4;
  text-align: left;
}

/* Question Navigation Buttons and Hints */
.question-nav-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  margin-top: 1rem;
}

.keyboard-hint {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--text-muted);
  opacity: 0.7;
}

.keyboard-key {
  font-family: var(--font-mono);
  background: var(--kbd-bg);
  border: 1px solid var(--border-color);
  border-bottom: 2px solid var(--text-muted);
  border-radius: 4px;
  padding: 0.15rem 0.35rem;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-main);
  box-shadow: 0 1px 1px rgba(0,0,0,0.05);
}

/* Buttons Common */
.primary-btn, .secondary-btn {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.75rem 1.6rem;
  border-radius: 50px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  outline: none;
  transition: var(--transition-medium);
}

.primary-btn {
  background: var(--vibe-gradient);
  border: none;
  color: #fff;
  box-shadow: 0 4px 15px var(--accent-glow);
}

.primary-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--accent-glow);
  opacity: 0.95;
}

.primary-btn:active {
  transform: translateY(1px);
}

.secondary-btn {
  background: var(--input-bg);
  border: 1px solid var(--border-color);
  color: var(--text-main);
}

.secondary-btn:hover {
  border-color: var(--border-color-focus);
  transform: translateY(-2px);
}

.btn-arrow {
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.primary-btn:hover .btn-arrow {
  transform: translateX(4px);
}

.pulse-glow {
  position: relative;
}

.pulse-glow::after {
  content: "";
  position: absolute;
  top: -4px;
  left: -4px;
  right: -4px;
  bottom: -4px;
  border-radius: 50px;
  border: 2px solid var(--accent-color);
  opacity: 0;
  pointer-events: none;
  animation: pulse-glow-border 2s cubic-bezier(0.16, 1, 0.3, 1) infinite;
}

/* ==========================================
   13. SCREEN 3: SUMMARY & COPIED PANEL
   ========================================== */
.review-dashboard-wrapper {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  width: 100%;
}

.text-center {
  text-align: center;
}

.vibe-insights-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  width: 100%;
}

.vibe-insight-card {
  padding: 1.5rem;
  text-align: left;
}

.vibe-insight-card h3 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
  color: var(--text-main);
}

.chosen-vibe-pill {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: #fff;
  background: var(--vibe-gradient);
  padding: 0.35rem 1rem;
  border-radius: 30px;
  margin-bottom: 0.8rem;
}

.insight-explanation {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.recommendation-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  font-size: 0.85rem;
}

.recommendation-list li {
  color: var(--text-muted);
  border-bottom: 1px dashed var(--border-color);
  padding-bottom: 0.4rem;
}
.recommendation-list li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.recommendation-list li strong {
  color: var(--text-main);
}

/* The Compiled Editorial Letter Book */
.compiled-letter-container {
  padding: 3rem;
  text-align: left;
  background: var(--input-bg);
  position: relative;
  overflow: hidden;
}

.compiled-letter-container::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--vibe-gradient);
}

.letter-top {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.8rem;
}

.letter-recipient {
  font-weight: 700;
}

.letter-body {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.letter-section {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.letter-section-title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--accent-color);
  letter-spacing: 0.05em;
}

.letter-question-block {
  border-left: 2px solid var(--border-color);
  padding-left: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.letter-question-title {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
}

.letter-answer-text {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--text-main);
  white-space: pre-wrap;
}

.letter-answer-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.letter-answer-column {
  background: rgba(0, 0, 0, 0.02);
  padding: 0.8rem 1rem;
  border-radius: 12px;
}

.theme-cinematic .letter-answer-column {
  background: rgba(255, 255, 255, 0.02);
}

.letter-partner-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--accent-color);
  text-transform: uppercase;
  margin-bottom: 0.4rem;
  display: block;
}

.letter-signature {
  margin-top: 3rem;
  border-top: 1px solid var(--border-color);
  padding-top: 1.5rem;
  font-family: var(--font-serif);
  color: var(--text-main);
  font-size: 1.15rem;
}

.signature-names {
  font-weight: 700;
  margin-top: 0.25rem;
  font-size: 1.3rem;
  background: var(--vibe-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Actions */
.export-actions-row {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.videographer-credits {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.copyright-sub {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.05em;
  opacity: 0.6;
}

/* ==========================================
   14. TOAST MESSAGE STYLING
   ========================================== */
.toast-notification {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translate(-50%, 100px);
  background: var(--text-main);
  color: var(--bg-app);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.8rem 1.6rem;
  border-radius: 50px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.25);
  z-index: 1000;
  transition: transform 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.5s ease;
  pointer-events: none;
  opacity: 0;
}

.toast-notification.active {
  transform: translate(-50%, 0);
  opacity: 1;
}

/* ==========================================
   15. ANIMATIONS & MICRO-TRANSITIONS
   ========================================== */
@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(40px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-4px); }
  100% { transform: translateY(0px); }
}

@keyframes pulse-glow {
  0% { opacity: 0.6; }
  50% { opacity: 1; }
  100% { opacity: 0.6; }
}

@keyframes pulse-glow-border {
  0% {
    transform: scale(1);
    opacity: 0.5;
  }
  100% {
    transform: scale(1.05);
    opacity: 0;
  }
}

@keyframes bounce {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

/* Active transition states */
.anim-fade-out {
  opacity: 0;
  transform: translateY(-20px) scale(0.98);
  transition: var(--transition-medium);
}

.anim-fade-in {
  opacity: 1;
  transform: translateY(0) scale(1);
  transition: var(--transition-medium);
}

/* Premium CSS Slider Keyframes (Sliding from and to absolute browser viewport edges) */
@keyframes slideOutLeftViewport {
  0% {
    transform: translateX(0) scale(1);
    opacity: 1;
  }
  100% {
    transform: translateX(calc(-50vw - 50%)) scale(0.98);
    opacity: 0;
  }
}

@keyframes slideInRightViewport {
  0% {
    transform: translateX(calc(50vw + 50%)) scale(0.98);
    opacity: 0;
  }
  100% {
    transform: translateX(0) scale(1);
    opacity: 1;
  }
}

@keyframes slideOutRightViewport {
  0% {
    transform: translateX(0) scale(1);
    opacity: 1;
  }
  100% {
    transform: translateX(calc(50vw + 50%)) scale(0.98);
    opacity: 0;
  }
}

@keyframes slideInLeftViewport {
  0% {
    transform: translateX(calc(-50vw - 50%)) scale(0.98);
    opacity: 0;
  }
  100% {
    transform: translateX(0) scale(1);
    opacity: 1;
  }
}

/* Premium Slider Animation Classes */
.anim-slide-out-left {
  animation: slideOutLeftViewport 0.4s cubic-bezier(0.3, 0.05, 0.85, 0.1) forwards !important;
}

.anim-slide-in-right {
  animation: slideInRightViewport 0.5s cubic-bezier(0.15, 0.85, 0.35, 1) forwards !important;
}

.anim-slide-out-right {
  animation: slideOutRightViewport 0.4s cubic-bezier(0.3, 0.05, 0.85, 0.1) forwards !important;
}

.anim-slide-in-left {
  animation: slideInLeftViewport 0.5s cubic-bezier(0.15, 0.85, 0.35, 1) forwards !important;
}

/* ==========================================
   16. RESPONSIVE DESIGN (MEDIA QUERIES)
   ========================================== */
@media (max-width: 900px) {
  .app-header {
    flex-direction: column;
    margin-top: 1rem;
    align-items: center;
    text-align: center;
  }

  .controls-panel {
    border-radius: 20px;
    flex-wrap: wrap;
    justify-content: center;
    padding: 0.8rem;
    gap: 0.8rem;
    width: 100%;
  }

  .theme-control::after {
    display: none;
  }

  .theme-control, .author-control {
    width: 100%;
    justify-content: space-between;
  }

  .survey-card {
    padding: 1.5rem;
    border-radius: 24px;
  }

  .serif-title {
    font-size: 1.8rem;
  }

  .serif-question-title {
    font-size: 1.5rem;
  }

  .split-answers-wrapper {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .split-textbox {
    height: 140px;
  }

  .vibe-insights-grid {
    grid-template-columns: 1fr;
  }

  .compiled-letter-container {
    padding: 1.5rem;
  }

  .letter-answer-split {
    grid-template-columns: 1fr;
    gap: 0.8rem;
  }

  .export-actions-row {
    flex-direction: column;
    width: 100%;
    align-items: stretch;
  }

  .export-actions-row button {
    justify-content: center;
  }

  .keyboard-hint {
    display: none;
  }
}

@media (max-width: 480px) {
  .brand-title {
    font-size: 1.4rem;
  }

  .names-row {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .vibe-cards-grid {
    grid-template-columns: 1fr;
  }
}