/* Taletreck Design System */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;500;600;700&family=Inter:wght@400;500;600;700&display=swap');

/* ========================================
   1. DESIGN TOKENS & CSS VARIABLES
======================================== */

:root {
  /* Colors - Brand/Primary */
  --color-primary-600: #1F5D46;
  --color-primary-500: #2a785b;
  --color-primary-400: #3A8A6B;
  --color-primary-200: #BFE2D2;
  
  /* RGB variants for rgba() usage */
  --color-primary-600-rgb: 31, 93, 70;
  --color-primary-500-rgb: 42, 120, 91;
  --color-primary-400-rgb: 58, 138, 107;
  --color-primary-200-rgb: 191, 226, 210;
  
  /* Colors - Neutrals */
  --color-bg: #F5F3EF;
  --color-surface: #FFFFFF;
  --color-surface-alt: #FAFAF9;
  --color-text: #27313A;
  --color-text-muted: #5E6A75;
  --color-border: #E6E1DA;
  
  /* Colors - Semantic */
  --color-success: #2E7D32;
  --color-warning: #C77800;
  --color-error: #B3261E;
  --color-info: #0B6BCB;
  
  /* Colors - Overlays */
  --color-overlay: rgba(0, 0, 0, 0.48);
  --color-scrim: rgba(42, 120, 91, 0.12);
  
  /* Typography */
  --font-display: "Playfair Display", serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  /* Font Sizes */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-md: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  
  /* Font Weights */
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Line Heights */
  --line-base: 1.6;
  --line-tight: 1.3;
  
  /* Letter Spacing */
  --tracking-tight: -0.01em;
  --tracking-wide: 0.02em;
  
  /* Spacing Scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  
  /* Border Radius */
  --radius-xs: 0.375rem;
  --radius-sm: 0.625rem;
  --radius-md: 0.875rem;
  --radius-lg: 1.25rem;
  --radius-xl: 1.75rem;
  --radius-pill: 999px;
  
  /* Elevations (Box Shadows) */
  --elevation-0: none;
  --elevation-1: 0 1px 2px rgba(0, 0, 0, 0.06);
  --elevation-2: 0 4px 10px rgba(0, 0, 0, 0.08);
  --elevation-3: 0 10px 24px rgba(42, 120, 91, 0.14);
  --elevation-4: 0 24px 48px rgba(0, 0, 0, 0.18);
  
  /* Motion */
  --duration-fast: 120ms;
  --duration-base: 200ms;
  --duration-slow: 320ms;
  --easing-standard: cubic-bezier(0.2, 0.0, 0, 1);
  --easing-emphasis: cubic-bezier(0.2, 0.8, 0.2, 1);
  
  /* Layout */
  --container-max: 68rem;
  --grid-gap: 1.5rem;
}

/* ========================================
   2. RESET & BASE STYLES
======================================== */

* {
  box-sizing: border-box;
}

body {
  font-family: var(--font-body);
  font-size: var(--font-size-md);
  line-height: var(--line-base);
  color: var(--color-text);
  background: var(--color-bg);
  margin: 0;
  padding: 0;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Smooth scrolling for better UX */
html {
  scroll-behavior: smooth;
}

/* ========================================
   3. LAYOUT & CONTAINER
======================================== */

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-6);
}

@media (max-width: 768px) {
  .container {
    padding: var(--space-4);
  }
}

/* ========================================
   4. HERO SECTION
======================================== */

.hero {
  text-align: center;
  padding: var(--space-16) var(--space-8);
  margin-bottom: var(--space-12);
  background: linear-gradient(135deg, var(--color-scrim), transparent), var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--elevation-2);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at center, transparent 0%, var(--color-scrim) 100%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-logo {
  height: 6rem;
  width: auto;
  margin-bottom: var(--space-4);
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.hero-title {
  font-family: var(--font-display);
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  margin: 0 0 var(--space-3) 0;
  letter-spacing: var(--tracking-tight);
  line-height: var(--line-tight);
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  margin: 0;
  max-width: 36rem;
  margin-left: auto;
  margin-right: auto;
}

@media (max-width: 768px) {
  .hero {
    padding: var(--space-12) var(--space-4);
  }
  
  .hero-title {
    font-size: var(--font-size-3xl);
  }
  
  .hero-logo {
    height: 3rem;
  }
}

/* ========================================
   5. CARDS & SECTIONS
======================================== */

.card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--elevation-1);
  padding: var(--space-8);
  margin-bottom: var(--space-6);
  transition: all var(--duration-base) var(--easing-standard);
}

.card:hover {
  box-shadow: var(--elevation-2);
  transform: translateY(-2px);
}

.card-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
}

.card-icon {
  width: 1.5rem;
  height: 1.5rem;
  padding: var(--space-2);
  background: rgba(var(--color-primary-500-rgb), 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary-500);
}

.card-title {
  font-family: var(--font-display);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin: 0;
  letter-spacing: var(--tracking-tight);
}

.card-description {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  margin: 0 0 var(--space-5) 0;
  line-height: var(--line-base);
}

/* ========================================
   6. FORM ELEMENTS
======================================== */

.form-group {
  margin-bottom: var(--space-5);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
}

label {
  display: block;
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  margin-bottom: var(--space-2);
  font-size: var(--font-size-sm);
}

input[type="email"],
input[type="text"],
textarea,
select {
  width: 100%;
  height: 2.75rem;
  padding: 0 var(--space-4);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-md);
  font-family: var(--font-body);
  background: var(--color-surface);
  color: var(--color-text);
  transition: all var(--duration-base) var(--easing-standard);
}

input[type="email"]:focus,
input[type="text"]:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-primary-400);
  box-shadow: 0 0 0 3px rgba(58, 138, 107, 0.1);
}

textarea {
  height: auto;
  min-height: 7.5rem;
  padding: var(--space-4);
  resize: vertical;
}

select {
  cursor: pointer;
}

input::placeholder,
textarea::placeholder {
  color: var(--color-text-muted);
  opacity: 0.72;
}

.form-helper {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

/* Character Counter */
.char-counter {
  text-align: right;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

.char-counter.warning {
  color: var(--color-warning);
}

.char-counter.error {
  color: var(--color-error);
}

/* ========================================
   7. BUTTONS
======================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all var(--duration-base) var(--easing-standard);
  position: relative;
  overflow: hidden;
}

.btn:focus {
  outline: 2px solid var(--color-primary-200);
  outline-offset: 2px;
}

/* Button Sizes */
.btn-sm {
  height: 2.25rem;
  padding: 0 var(--space-3);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-sm);
}

.btn-md {
  height: 2.75rem;
  padding: 0 var(--space-5);
  font-size: var(--font-size-md);
  border-radius: var(--radius-md);
}

.btn-lg {
  height: 3.25rem;
  padding: 0 var(--space-6);
  font-size: var(--font-size-lg);
  border-radius: var(--radius-lg);
}

/* Button Variants */
.btn-primary {
  background: var(--color-primary-500);
  color: white;
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-400);
  transform: translateY(-2px);
  box-shadow: var(--elevation-3);
}

.btn-primary:active {
  background: var(--color-primary-600);
  transform: translateY(0);
}

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

.btn-secondary:hover:not(:disabled) {
  background: var(--color-surface-alt);
  border-color: var(--color-primary-200);
  transform: translateY(-1px);
  box-shadow: var(--elevation-2);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

/* Generate Button Special Styling */
#generateBtn {
  width: 100%;
  margin-top: var(--space-6);
  background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-400));
  position: relative;
}

#generateBtn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left var(--duration-slow) var(--easing-emphasis);
}

#generateBtn:hover::before {
  left: 100%;
}

/* ========================================
   8. UPLOADER COMPONENT
======================================== */

.uploader-section {
  position: relative;
}

#uploader {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-12) var(--space-6);
  text-align: center;
  background: var(--color-surface-alt);
  cursor: pointer;
  transition: all var(--duration-base) var(--easing-standard);
  position: relative;
  overflow: hidden;
}

#uploader::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at center, var(--color-primary-200) 0%, transparent 70%);
  opacity: 0;
  transition: opacity var(--duration-base) var(--easing-standard);
  pointer-events: none;
}

#uploader:hover,
#uploader.drag-over {
  border-color: var(--color-primary-400);
  background: rgba(58, 138, 107, 0.05);
  transform: scale(1.01);
}

#uploader:hover::before,
#uploader.drag-over::before {
  opacity: 0.1;
}

#uploader.drag-over {
  border-style: solid;
  background: rgba(58, 138, 107, 0.1);
  animation: pulse 1s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1.01); }
  50% { transform: scale(1.02); }
}

.upload-content {
  position: relative;
  z-index: 1;
}

.upload-icon {
  font-size: 3rem;
  color: var(--color-primary-400);
  margin-bottom: var(--space-4);
  display: block;
}

.upload-text {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.upload-hint {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* Photo Gallery */
#gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.photo-thumbnail {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--elevation-1);
  cursor: grab;
  transition: all var(--duration-base) var(--easing-standard);
  background: var(--color-surface-alt);
}

.photo-thumbnail:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: var(--elevation-3);
}

.photo-thumbnail.dragging {
  opacity: 0.7;
  cursor: grabbing;
  transform: rotate(5deg) scale(1.05);
  z-index: 10;
}

.photo-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.photo-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.4);
  opacity: 0;
  transition: opacity var(--duration-base) var(--easing-standard);
  display: flex;
  align-items: center;
  justify-content: center;
}

.photo-thumbnail:hover .photo-overlay {
  opacity: 1;
}

.photo-index {
  position: absolute;
  top: var(--space-2);
  left: var(--space-2);
  background: var(--color-primary-500);
  color: white;
  border-radius: 50%;
  width: 1.5rem;
  height: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
}

.photo-remove {
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  background: var(--color-error);
  color: white;
  border: none;
  border-radius: 50%;
  width: 1.5rem;
  height: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  transition: all var(--duration-base) var(--easing-standard);
}

.photo-remove:hover {
  background: #c53030;
  transform: scale(1.1);
}

.photo-count {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--space-3);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

#photoCount {
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary-500);
}

#photoCount.error {
  color: var(--color-error);
}

/* ========================================
   9. MUSIC SELECTION CARDS
======================================== */

.music-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.music-option {
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  cursor: pointer;
  transition: all var(--duration-base) var(--easing-standard);
  background: var(--color-surface);
  position: relative;
  overflow: hidden;
}

.music-option::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, var(--color-primary-200), transparent);
  opacity: 0;
  transition: opacity var(--duration-base) var(--easing-standard);
}

.music-option:hover {
  border-color: var(--color-primary-200);
  transform: translateY(-2px);
  box-shadow: var(--elevation-2);
}

.music-option:hover::before {
  opacity: 0.1;
}

.music-option.selected {
  border-color: var(--color-primary-400);
  background: rgba(58, 138, 107, 0.08);
}

.music-option.selected::before {
  opacity: 0.15;
}

.music-content {
  position: relative;
  z-index: 1;
}

.music-title {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.music-description {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.music-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.play-btn {
  background: var(--color-primary-500);
  color: white;
  border: none;
  border-radius: 50%;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--duration-base) var(--easing-standard);
  font-size: var(--font-size-sm);
}

.play-btn:hover {
  background: var(--color-primary-400);
  transform: scale(1.1);
  box-shadow: var(--elevation-2);
}

.play-btn.playing {
  background: var(--color-warning);
  animation: pulse-play 2s ease-in-out infinite;
}

@keyframes pulse-play {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.8; }
}

@keyframes ripple {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

@keyframes sparkleFloat {
  0% {
    transform: translateY(0) rotate(0deg);
    opacity: 1;
  }
  100% {
    transform: translateY(-100px) rotate(360deg);
    opacity: 0;
  }
}

@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes slideOutRight {
  from {
    transform: translateX(0);
    opacity: 1;
  }
  to {
    transform: translateX(100%);
    opacity: 0;
  }
}

/* ========================================
   10. PROGRESS TRACKER
======================================== */

#progress {
  display: none;
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  margin-top: var(--space-8);
  box-shadow: var(--elevation-2);
  border: 1px solid var(--color-border);
}

#progress.visible {
  display: block;
  animation: slideInUp var(--duration-slow) var(--easing-emphasis);
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(2rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.progress-header {
  text-align: center;
  margin-bottom: var(--space-8);
}

.progress-header h2 {
  font-family: var(--font-display);
  font-size: var(--font-size-2xl);
  color: var(--color-text);
  margin: 0 0 var(--space-2) 0;
}

#progressText {
  color: var(--color-text-muted);
  font-size: var(--font-size-lg);
}

.progress-bar {
  background: var(--color-border);
  border-radius: var(--radius-pill);
  height: 0.5rem;
  overflow: hidden;
  margin-bottom: var(--space-8);
  position: relative;
}

.progress-bar-fill {
  background: linear-gradient(90deg, var(--color-primary-400), var(--color-primary-500));
  height: 100%;
  width: 0%;
  transition: width var(--duration-base) var(--easing-standard);
  border-radius: var(--radius-pill);
  position: relative;
}

.progress-bar-fill::after {
  content: '';
  position: absolute;
  top: 0;
  right: -1rem;
  width: 1rem;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3));
  animation: shimmer 2s ease-in-out infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.progress-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--space-3);
}

.progress-step {
  text-align: center;
  padding: var(--space-3) var(--space-2);
  border-radius: var(--radius-sm);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  transition: all var(--duration-base) var(--easing-standard);
  position: relative;
  overflow: hidden;
}

.progress-step.active {
  background: rgba(58, 138, 107, 0.1);
  border-color: var(--color-primary-400);
  color: var(--color-primary-500);
  font-weight: var(--font-weight-medium);
  transform: scale(1.02);
  animation: activeStep 2s ease-in-out infinite;
}

@keyframes activeStep {
  0%, 100% { background: rgba(58, 138, 107, 0.1); }
  50% { background: rgba(58, 138, 107, 0.15); }
}

.progress-step.completed {
  background: rgba(46, 125, 50, 0.1);
  border-color: var(--color-success);
  color: var(--color-success);
  font-weight: var(--font-weight-medium);
}

.progress-step.completed::after {
  content: '✓';
  position: absolute;
  top: var(--space-1);
  right: var(--space-1);
  font-size: var(--font-size-xs);
}

/* ========================================
   11. RESULT CARD
======================================== */

#resultCard {
  display: none;
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  margin-top: var(--space-8);
  box-shadow: var(--elevation-3);
  text-align: center;
  border: 1px solid var(--color-success);
  position: relative;
  overflow: hidden;
}

#resultCard::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(46, 125, 50, 0.05), transparent);
  pointer-events: none;
}

#resultCard.visible {
  display: block;
  animation: celebrationEntrance var(--duration-slow) var(--easing-emphasis);
}

#resultCard:focus {
  outline: 2px solid rgba(var(--color-primary-500-rgb), 0.6);
  outline-offset: 4px;
}

@keyframes celebrationEntrance {
  0% {
    opacity: 0;
    transform: scale(0.95) translateY(2rem);
  }
  60% {
    transform: scale(1.02) translateY(-0.5rem);
  }
  100% {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.result-header {
  margin-bottom: var(--space-6);
  position: relative;
  z-index: 1;
}

.result-header h2 {
  font-family: var(--font-display);
  font-size: var(--font-size-2xl);
  color: var(--color-text);
  margin: 0 0 var(--space-2) 0;
}

.result-header p {
  color: var(--color-text-muted);
  font-size: var(--font-size-lg);
  margin: 0;
}

.result-actions {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-4);
}

#fallbackInfo {
  display: none;
  background: rgba(199, 120, 0, 0.1);
  border: 1px solid var(--color-warning);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  color: #9a5a00;
  font-size: var(--font-size-sm);
  margin-top: var(--space-4);
}

#fallbackInfo.visible {
  display: block;
}

.fallback-header {
  margin-bottom: var(--space-3);
  font-weight: var(--font-weight-semibold);
}

.fallback-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.fallback-item {
  padding: var(--space-2);
  background: rgba(199, 120, 0, 0.05);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--color-warning);
  margin-bottom: var(--space-2);
}

.fallback-footer {
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid rgba(199, 120, 0, 0.2);
  font-weight: var(--font-weight-medium);
  color: #7c4a00;
}

/* ========================================
   12. RADIO BUTTONS & CHECKBOXES
======================================== */

input[type="checkbox"],
input[type="radio"] {
  width: 1.125rem;
  height: 1.125rem;
  margin-right: var(--space-2);
  accent-color: var(--color-primary-500);
  transform: none;
}

.radio-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.radio-option {
  display: flex;
  align-items: center;
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--duration-base) var(--easing-standard);
  background: var(--color-surface);
}

.radio-option:hover {
  border-color: var(--color-primary-200);
  background: var(--color-surface-alt);
}

.radio-option input[type="radio"]:checked + .radio-content {
  color: var(--color-primary-500);
}

.radio-content {
  margin-left: var(--space-2);
}

.radio-title {
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.radio-description {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* ========================================
   13. ACCESSIBILITY & UTILITIES
======================================== */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

*:focus {
  outline: 2px solid var(--color-primary-400);
  outline-offset: 2px;
}

/* Error States */
.form-group.has-error input,
.form-group.has-error textarea,
.form-group.has-error select {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(179, 38, 30, 0.1);
}

.error-message {
  color: var(--color-error);
  font-size: var(--font-size-sm);
  margin-top: var(--space-1);
  display: none;
}

.error-message.visible {
  display: block;
}

/* ========================================
   14. RESPONSIVE DESIGN
======================================== */

@media (max-width: 768px) {
  .form-row {
    grid-template-columns: 1fr;
  }
  
  #gallery {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: var(--space-3);
  }
  
  .music-grid {
    grid-template-columns: 1fr;
  }
  
  .progress-steps {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2);
  }
  
  .result-actions {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    max-width: 300px;
  }
  
  .card {
    padding: var(--space-6);
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: var(--font-size-2xl);
  }
  
  #gallery {
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  }
  
  .progress-steps {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   15. REDUCED MOTION
======================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  #uploader.drag-over {
    animation: none;
  }
  
  .play-btn.playing {
    animation: none;
  }
  
  .progress-bar-fill::after {
    animation: none;
  }
}

/* ========================================
   16. HIGH CONTRAST MODE
======================================== */

@media (prefers-contrast: high) {
  .card {
    border-width: 2px;
  }
  
  input[type="email"],
  input[type="text"],
  textarea,
  select {
    border-width: 2px;
  }
  
  #uploader {
    border-width: 3px;
  }
  
  .btn {
    border-width: 2px;
  }
}

/* ========================================
   17. COMPACT HEADER & PROGRESS MODE
======================================== */

/* Compact header - hidden by default, shown during progress */
.compact-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  padding: var(--space-3) var(--space-4);
  display: none; /* Hidden by default */
}

.compact-header-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.compact-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.compact-logo img {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
}

.compact-title {
  font-family: var(--font-display);
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text);
}

.status-chip {
  background: var(--color-primary-200);
  color: var(--color-primary-600);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

/* Progress mode - adjusts layout when showing progress */
.progress-mode .hero {
  display: none !important;
}

.progress-mode .compact-header {
  display: block !important;
}

.progress-mode .form-container {
  padding-top: 80px; /* Account for fixed compact header */
}

/* Cancel button in progress section */
#cancelBtn {
  margin-left: auto;
  font-size: var(--font-size-sm);
  padding: var(--space-1) var(--space-3);
}

#cancelBtn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Mobile adjustments for compact header */
@media (max-width: 768px) {
  .compact-header {
    padding: var(--space-2) var(--space-3);
  }
  
  .compact-title {
    font-size: var(--font-size-md);
  }
  
  .compact-logo img {
    width: 28px;
    height: 28px;
  }
  
  .status-chip {
    font-size: var(--font-size-xs);
    padding: var(--space-1) var(--space-2);
  }
  
  .progress-mode .form-container {
    padding-top: 60px;
  }
}