/* Modern StitchPattern Design System */

:root {
  /* Primary Colors */
  --primary-50: #fdf4f8;
  --primary-100: #fce7f1;
  --primary-200: #fbcfe3;
  --primary-300: #f8a8c9;
  --primary-400: #f375a3;
  --primary-500: #e84d7e;
  --primary-600: #d42d5f;
  --primary-700: #b21e47;
  --primary-800: #921b3d;
  --primary-900: #791a36;

  /* Secondary - Teal */
  --secondary-50: #f0fdfa;
  --secondary-100: #ccfbf1;
  --secondary-200: #99f6e4;
  --secondary-300: #5eead4;
  --secondary-400: #2dd4bf;
  --secondary-500: #14b8a6;
  --secondary-600: #0d9488;
  --secondary-700: #0f766e;
  --secondary-800: #115e59;
  --secondary-900: #134e4a;

  /* Neutral */
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;

  /* Semantic */
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --info: #3b82f6;

  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Inter', system-ui, sans-serif;

  /* Spacing */
  --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;
  --space-24: 6rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  --shadow-inner: inset 0 2px 4px 0 rgb(0 0 0 / 0.05);

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-2xl: 2rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition: 250ms ease;
  --transition-slow: 350ms ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--gray-800);
  background: linear-gradient(180deg, var(--primary-50) 0%, white 50%);
  min-height: 100vh;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  color: var(--gray-900);
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: 1.25rem; }

p {
  margin-bottom: var(--space-4);
  color: var(--gray-600);
}

a {
  color: var(--primary-600);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-700);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-lg);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  color: white;
  box-shadow: var(--shadow-md), 0 0 0 0 var(--primary-200);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 0 0 4px var(--primary-200);
}

.btn-secondary {
  background: white;
  color: var(--gray-700);
  border-color: var(--gray-300);
}

.btn-secondary:hover {
  background: var(--gray-50);
  border-color: var(--gray-400);
  color: var(--gray-900);
  transform: translateY(-1px);
}

.btn-large {
  padding: var(--space-4) var(--space-8);
  font-size: 1.0625rem;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* Testing Mode Banner */
.testing-banner {
  background: linear-gradient(135deg, var(--secondary-500), var(--secondary-600));
  color: white;
  padding: var(--space-3) 0;
  position: relative;
  z-index: 999;
  box-shadow: var(--shadow-md);
}

.testing-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  text-align: center;
}

.testing-icon {
  font-size: 1.5rem;
}

.testing-text {
  font-size: 0.9375rem;
}

.testing-text strong {
  background: rgba(255, 255, 255, 0.2);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  margin-right: var(--space-2);
}

/* Hero Section Padding - accounts for fixed navbar */
.hero {
  padding-top: calc(4.5rem + var(--space-16)) !important;
}

@media (max-width: 768px) {
  .hero {
    padding-top: calc(4.5rem + var(--space-12)) !important;
  }
}

.share-promo {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  color: white;
}

.bulk-promo {
  background: linear-gradient(135deg, var(--secondary-500), var(--secondary-600));
  color: white;
}

.promo-content {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.promo-icon {
  font-size: 2rem;
  flex-shrink: 0;
}

.promo-text {
  flex: 1;
  font-size: 0.9375rem;
}

.promo-text strong {
  font-weight: 700;
}

.promo-highlight {
  background: rgba(255, 255, 255, 0.25);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-weight: 700;
}

.promo-btn {
  background: white;
  color: var(--primary-600);
  border: none;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  margin-left: var(--space-4);
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.promo-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.bulk-promo .promo-text small {
  opacity: 0.9;
  font-size: 0.8rem;
  margin-left: var(--space-2);
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
  padding: var(--space-4) 0;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 800;
  font-size: 1.375rem;
  color: var(--gray-900);
  text-decoration: none;
}

.logo-icon {
  font-size: 1.75rem;
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-links a {
  color: var(--gray-600);
  font-weight: 500;
  font-size: 0.9375rem;
  transition: color var(--transition-fast);
}

.nav-links a:hover {
  color: var(--primary-600);
}

/* Hero Section */
.hero {
  padding: calc(4.5rem + var(--space-24)) 0 var(--space-24);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -10%;
  width: 120%;
  height: 100%;
  background: radial-gradient(ellipse at center, var(--primary-200) 0%, transparent 70%);
  opacity: 0.5;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  margin-bottom: var(--space-6);
  background: linear-gradient(135deg, var(--gray-900), var(--primary-700));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--gray-600);
  margin-bottom: var(--space-8);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  margin-bottom: var(--space-12);
}

.hero-features {
  display: flex;
  justify-content: center;
  gap: var(--space-8);
}

.hero-features .feature {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 600;
  color: var(--gray-700);
  font-size: 0.9375rem;
}

.feature-icon {
  font-size: 1.25rem;
}

/* Upload Section */
.upload-section {
  padding: var(--space-16) 0;
  background: white;
  position: relative;
}

.upload-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 4px;
  background: linear-gradient(90deg, transparent, var(--primary-400), transparent);
}

.upload-container {
  max-width: 700px;
  margin: 0 auto;
  background: linear-gradient(135deg, var(--gray-50), white);
  border-radius: var(--radius-2xl);
  padding: var(--space-10);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--gray-100);
}

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

.upload-header h2 {
  margin-bottom: var(--space-2);
}

.upload-header p {
  color: var(--gray-500);
  margin-bottom: 0;
}

.upload-area {
  background: white;
  border: 3px dashed var(--gray-300);
  border-radius: var(--radius-xl);
  padding: var(--space-12) var(--space-8);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.upload-area:hover,
.upload-area.dragover {
  border-color: var(--primary-400);
  background: var(--primary-50);
}

.upload-icon {
  font-size: 4rem;
  margin-bottom: var(--space-4);
  opacity: 0.8;
}

.upload-placeholder p {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: var(--space-2);
}

.upload-hint {
  color: var(--gray-400);
  font-size: 0.875rem;
}

.upload-preview {
  position: relative;
  display: inline-block;
}

.upload-preview img {
  max-height: 300px;
  max-width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.btn-icon {
  position: absolute;
  top: -12px;
  right: -12px;
  width: 32px;
  height: 32px;
  background: var(--error);
  color: white;
  border: none;
  border-radius: 50%;
  font-size: 1.25rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-fast);
}

.btn-icon:hover {
  transform: scale(1.1);
}

.upload-options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  margin: var(--space-8) 0;
}

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

.option-group label {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--gray-700);
}

.option-group input[type="range"] {
  width: 100%;
  accent-color: var(--primary-500);
}

.option-group select {
  padding: var(--space-3);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-lg);
  font-size: 0.9375rem;
  background: white;
  cursor: pointer;
}

.option-value {
  font-size: 0.8125rem;
  color: var(--primary-600);
  font-weight: 600;
}

.price-estimate {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  color: white;
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: var(--space-8) 0;
}

.estimate-label {
  font-size: 0.9375rem;
  opacity: 0.9;
}

.estimate-value {
  font-size: 2rem;
  font-weight: 800;
}

.estimate-tier {
  background: rgba(255, 255, 255, 0.2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
}

.upload-note {
  text-align: center;
  font-size: 0.8125rem;
  color: var(--gray-500);
  margin-top: var(--space-6);
  margin-bottom: 0;
}

/* Results Section */
.results-section {
  padding: var(--space-16) 0;
  background: linear-gradient(180deg, var(--gray-50), white);
}

.results-container {
  max-width: 1100px;
  margin: 0 auto;
}

.results-header {
  text-align: center;
  margin-bottom: var(--space-10);
}

.results-header h2 {
  margin-bottom: var(--space-3);
}

.results-header p {
  color: var(--gray-500);
  font-size: 1.125rem;
  margin-bottom: 0;
}

.results-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-8);
  align-items: start;
}

.results-preview {
  position: sticky;
  top: calc(4.5rem + var(--space-4));
}

.preview-container {
  background: white;
  border-radius: var(--radius-2xl);
  padding: var(--space-4);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--gray-100);
  margin-bottom: var(--space-6);
}

.preview-container img {
  width: 100%;
  border-radius: var(--radius-lg);
  display: block;
}

.pattern-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}

.stat {
  background: white;
  padding: var(--space-4);
  border-radius: var(--radius-xl);
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
}

.stat-value {
  display: block;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--space-1);
}

.stat-label {
  font-size: 0.75rem;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.results-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.color-legend {
  background: white;
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--gray-100);
  max-height: 400px;
  overflow-y: auto;
}

.color-legend h3 {
  margin-bottom: var(--space-4);
  font-size: 1.125rem;
}

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

.legend-list::-webkit-scrollbar {
  width: 6px;
}

.legend-list::-webkit-scrollbar-track {
  background: var(--gray-100);
  border-radius: var(--radius-full);
}

.legend-list::-webkit-scrollbar-thumb {
  background: var(--gray-300);
  border-radius: var(--radius-full);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-lg);
  transition: background var(--transition-fast);
}

.legend-item:hover {
  background: var(--gray-50);
}

.legend-color {
  width: 28px;
  height: 28px;
  border-radius: var(--radius);
  border: 2px solid white;
  box-shadow: var(--shadow);
  flex-shrink: 0;
}

.legend-symbol {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
  background: var(--gray-100);
  border-radius: var(--radius);
  flex-shrink: 0;
}

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

.legend-code {
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--gray-900);
}

.legend-name {
  font-size: 0.75rem;
  color: var(--gray-500);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.legend-count {
  font-size: 0.75rem;
  color: var(--gray-600);
  text-align: right;
  font-weight: 500;
  line-height: 1.4;
}

.pricing-breakdown {
  background: white;
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--gray-100);
}

.pricing-breakdown h3 {
  margin-bottom: var(--space-4);
  font-size: 1.125rem;
}

.breakdown-total {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4) 0;
  border-top: 2px solid var(--gray-200);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--gray-900);
}

.breakdown-total.simple {
  border-top: none;
  padding-top: 0;
  font-size: 1.5rem;
}

.breakdown-total .price-amount {
  color: var(--primary-600);
  font-size: 2rem;
}

.breakdown-description {
  font-size: 0.875rem;
  color: var(--gray-500);
  padding-top: var(--space-3);
  border-top: 1px solid var(--gray-100);
  line-height: 1.6;
}

/* Promo Input Section */
.promo-input-section {
  margin: var(--space-4) 0;
  padding: var(--space-4);
  background: var(--gray-50);
  border-radius: var(--radius-lg);
}

.promo-input-section label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: var(--space-2);
}

.promo-input-group {
  display: flex;
  gap: var(--space-2);
}

.promo-input-group input {
  flex: 1;
  padding: var(--space-3);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-lg);
  font-size: 0.9375rem;
  text-transform: uppercase;
}

.promo-input-group input:focus {
  outline: none;
  border-color: var(--primary-400);
}

.promo-input-group .btn {
  padding: var(--space-3) var(--space-4);
  font-size: 0.875rem;
}

.promo-message {
  font-size: 0.8125rem;
  margin-top: var(--space-2);
  min-height: 1.25rem;
}

.promo-message.success {
  color: var(--success);
  font-weight: 500;
}

.promo-message.error {
  color: var(--error);
}

/* Auth Pages */
.auth-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  padding-top: calc(4.5rem + var(--space-12));
}

.auth-box {
  background: white;
  padding: var(--space-10);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-2xl);
  width: 100%;
  max-width: 440px;
  border: 1px solid var(--gray-100);
}

.auth-box h1 {
  text-align: center;
  margin-bottom: var(--space-2);
  font-size: 1.75rem;
}

.auth-subtitle {
  text-align: center;
  color: var(--gray-500);
  margin-bottom: var(--space-8);
  font-size: 0.9375rem;
}

.auth-footer {
  text-align: center;
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--gray-100);
  font-size: 0.9375rem;
  color: var(--gray-500);
}

.auth-footer a {
  color: var(--primary-600);
  font-weight: 600;
}

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

.form-group label {
  display: block;
  margin-bottom: var(--space-2);
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--gray-700);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"] {
  width: 100%;
  padding: var(--space-4);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-lg);
  font-size: 0.9375rem;
  transition: all var(--transition-fast);
  background: white;
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary-400);
  box-shadow: 0 0 0 4px var(--primary-100);
}

.form-group input::placeholder {
  color: var(--gray-400);
}

.error-message {
  color: var(--error);
  font-size: 0.875rem;
  margin-bottom: var(--space-4);
  padding: var(--space-3) var(--space-4);
  background: #fef2f2;
  border-radius: var(--radius-lg);
  display: none;
}

.error-message:not(:empty) {
  display: block;
}

.success-message {
  color: var(--success);
  font-size: 0.875rem;
  margin-bottom: var(--space-4);
  padding: var(--space-3) var(--space-4);
  background: #ecfdf5;
  border-radius: var(--radius-lg);
  display: none;
}

.success-message:not(:empty) {
  display: block;
}

.discount-info {
  margin: var(--space-3) 0;
  padding: var(--space-3);
  background: #e8f5e9;
  border-radius: var(--radius-lg);
}

.discount-row {
  display: flex;
  justify-content: space-between;
  color: var(--success);
  font-size: 0.9375rem;
  margin-bottom: var(--space-2);
}

.final-price-row {
  display: flex;
  justify-content: space-between;
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--gray-900);
  padding-top: var(--space-2);
  border-top: 1px dashed var(--gray-300);
}

.btn-checkout {
  width: 100%;
  margin-top: var(--space-2);
}

.secure-note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3);
  background: var(--gray-50);
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  color: var(--gray-600);
}

/* Share Section */
.share-section {
  margin-top: var(--space-4);
  text-align: center;
}

.share-divider {
  display: flex;
  align-items: center;
  margin: var(--space-4) 0;
  color: var(--gray-400);
  font-size: 0.875rem;
}

.share-divider::before,
.share-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--gray-200);
}

.share-divider span {
  padding: 0 var(--space-4);
}

.btn-share {
  width: 100%;
  background: linear-gradient(135deg, #1877f2, #166fe5);
  color: white;
  border: none;
  box-shadow: var(--shadow-md);
}

.btn-share:hover {
  background: linear-gradient(135deg, #166fe5, #125ac2);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.share-hint {
  font-size: 0.8125rem;
  color: var(--gray-500);
  margin-top: var(--space-2);
  margin-bottom: 0;
}

/* Share Modal */
.share-modal {
  position: fixed;
  inset: 0;
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}

.share-modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
}

.share-modal-content {
  position: relative;
  background: white;
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  max-width: 500px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-2xl);
  z-index: 1;
}

.share-modal-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 36px;
  height: 36px;
  background: var(--gray-100);
  border: none;
  border-radius: 50%;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--gray-500);
  display: flex;
  align-items: center;
  justify-content: center;
}

.share-modal-close:hover {
  background: var(--gray-200);
  color: var(--gray-900);
}

.share-modal h2 {
  margin-bottom: var(--space-2);
  text-align: center;
}

.share-modal-subtitle {
  text-align: center;
  color: var(--gray-500);
  margin-bottom: var(--space-6);
}

.share-preview {
  position: relative;
  margin-bottom: var(--space-6);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.share-preview-img {
  width: 100%;
  display: block;
}

.share-preview-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0,0,0,0.7));
  color: white;
  padding: var(--space-4);
  font-size: 0.875rem;
  text-align: center;
}

.share-text-section {
  margin-bottom: var(--space-6);
}

.share-text-section label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--gray-700);
}

.share-text-section textarea {
  width: 100%;
  padding: var(--space-3);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-lg);
  font-size: 0.9375rem;
  resize: vertical;
  min-height: 100px;
  margin-bottom: var(--space-3);
  font-family: inherit;
}

.btn-copy {
  width: 100%;
}

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

.share-instructions {
  color: var(--gray-600);
  font-size: 0.875rem;
  margin-bottom: var(--space-4);
  line-height: 1.6;
}

.btn-facebook {
  background: linear-gradient(135deg, #1877f2, #166fe5);
  color: white;
  width: 100%;
}

.btn-facebook:hover {
  background: linear-gradient(135deg, #166fe5, #125ac2);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Pricing Section */
.pricing-section {
  padding: var(--space-24) 0;
  background: white;
}

.pricing-section h2 {
  text-align: center;
  margin-bottom: var(--space-3);
}

.pricing-subtitle {
  text-align: center;
  color: var(--gray-500);
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto var(--space-12);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.pricing-card {
  background: white;
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  border: 2px solid var(--gray-100);
  transition: all var(--transition);
}

.pricing-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.pricing-card.featured {
  border-color: var(--primary-400);
  background: linear-gradient(180deg, var(--primary-50) 0%, white 100%);
  transform: scale(1.02);
}

.pricing-card.featured:hover {
  transform: scale(1.02) translateY(-8px);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  color: white;
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  box-shadow: var(--shadow-md);
}

.pricing-card.featured {
  position: relative;
}

.pricing-header {
  text-align: center;
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-6);
  border-bottom: 2px solid var(--gray-100);
}

.pricing-header h3 {
  margin-bottom: var(--space-3);
  color: var(--gray-900);
  font-size: 1.25rem;
}

.pricing-price {
  display: flex;
  align-items: baseline;
  justify-content: center;
}

.price {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--gray-900);
  line-height: 1;
}

.pricing-features {
  list-style: none;
  flex: 1;
  margin-bottom: var(--space-6);
}

.pricing-features li {
  padding: var(--space-2) 0;
  padding-left: var(--space-6);
  position: relative;
  font-size: 0.875rem;
  color: var(--gray-600);
  border-bottom: 1px solid var(--gray-50);
}

.pricing-features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  width: 18px;
  height: 18px;
  background: var(--success);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.625rem;
  font-weight: 700;
  top: 50%;
  transform: translateY(-50%);
}

.pricing-card .btn {
  width: 100%;
}

.pricing-note {
  text-align: center;
  margin-top: var(--space-10);
  padding: var(--space-6);
  background: var(--gray-50);
  border-radius: var(--radius-xl);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  color: var(--gray-600);
  font-size: 0.9375rem;
}

/* Features Section */
.features-section {
  padding: var(--space-24) 0;
  background: linear-gradient(180deg, var(--secondary-50) 0%, var(--gray-50) 100%);
}

.features-section h2 {
  text-align: center;
  margin-bottom: var(--space-4);
}

.features-section > .container > p {
  text-align: center;
  color: var(--gray-500);
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto var(--space-12);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.feature-card {
  background: white;
  padding: var(--space-8);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow);
  text-align: center;
  transition: all var(--transition);
  border: 1px solid var(--gray-100);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.feature-icon-large {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--primary-100), var(--secondary-100));
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin: 0 auto var(--space-4);
  transition: transform var(--transition-fast);
}

.feature-card:hover .feature-icon-large {
  transform: scale(1.1);
}

.feature-card h3 {
  margin-bottom: var(--space-2);
  color: var(--gray-900);
  font-size: 1.125rem;
}

.feature-card p {
  color: var(--gray-600);
  font-size: 0.9375rem;
  line-height: 1.6;
  margin-bottom: 0;
}

/* Notice Section */
.notice-section {
  padding: var(--space-12) 0;
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
}

.notice-banner {
  display: flex;
  gap: var(--space-6);
  align-items: flex-start;
  max-width: 900px;
  margin: 0 auto;
  background: white;
  padding: var(--space-6);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-lg);
}

.notice-icon {
  font-size: 2rem;
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, #f59e0b, #d97706);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.notice-content h3 {
  margin-bottom: var(--space-2);
  color: #92400e;
  font-size: 1.25rem;
}

.notice-content p {
  color: #a16207;
  margin-bottom: 0;
  line-height: 1.6;
  font-size: 0.9375rem;
}

.notice-content a {
  color: #92400e;
  text-decoration: underline;
  font-weight: 600;
}

/* Legal Pages (Terms, Privacy, Refund Policy) */
.legal-content {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--space-16) var(--space-6);
  min-height: calc(100vh - 300px);
}

.legal-content h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--space-4);
  color: var(--gray-900);
}

.legal-content .last-updated {
  color: var(--gray-500);
  font-size: 0.9375rem;
  margin-bottom: var(--space-8);
}

.legal-content h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-top: var(--space-10);
  margin-bottom: var(--space-4);
  color: var(--gray-900);
  padding-bottom: var(--space-2);
  border-bottom: 2px solid var(--gray-200);
}

.legal-content h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
  color: var(--gray-800);
}

.legal-content p {
  margin-bottom: var(--space-4);
  line-height: 1.7;
  color: var(--gray-700);
}

.legal-content ul,
.legal-content ol {
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
}

.legal-content li {
  margin-bottom: var(--space-2);
  line-height: 1.7;
  color: var(--gray-700);
}

.legal-content a {
  color: var(--primary);
  text-decoration: underline;
}

.legal-content a:hover {
  color: var(--primary-dark);
}

/* Footer */
.footer {
  background: var(--gray-900);
  color: var(--gray-400);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.footer-brand .logo {
  color: white;
  margin-bottom: var(--space-4);
}

.footer-brand p {
  color: var(--gray-400);
  line-height: 1.7;
  font-size: 0.9375rem;
}

.footer-links h4 {
  color: white;
  margin-bottom: var(--space-4);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links a {
  display: block;
  color: var(--gray-400);
  padding: var(--space-2) 0;
  font-size: 0.9375rem;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: white;
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-8);
  border-top: 1px solid var(--gray-800);
}

.footer-bottom p {
  color: var(--gray-500);
  margin-bottom: 0;
  font-size: 0.875rem;
}

/* Utility Classes */
.hidden {
  display: none !important;
}

/* Loading Spinner */
.spinner {
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fadeIn 0.5s ease;
}

/* Responsive */
@media (max-width: 1024px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .pricing-card.featured {
    transform: scale(1);
  }
  
  .pricing-card.featured:hover {
    transform: translateY(-8px);
  }
  
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .results-grid {
    grid-template-columns: 1fr;
  }
  
  .results-preview {
    position: static;
  }
}

@media (max-width: 768px) {
  .testing-content {
    flex-direction: column;
    gap: var(--space-2);
    padding: 0 var(--space-4);
  }
  
  .testing-text {
    font-size: 0.875rem;
  }
  
  .auth-container {
    padding: var(--space-4);
    padding-top: calc(4.5rem + var(--space-8));
  }
  
  .auth-box {
    padding: var(--space-6);
  }
  
  .nav-links {
    display: none;
  }
  
  .hero {
    padding: calc(4.5rem + var(--space-12)) 0 var(--space-12);
  }
  
  .hero-features {
    flex-direction: column;
    gap: var(--space-3);
    align-items: center;
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .upload-options {
    grid-template-columns: 1fr;
  }
  
  .upload-container {
    padding: var(--space-6);
  }
  
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .pattern-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
  
  .notice-banner {
    flex-direction: column;
    text-align: center;
    margin: 0 var(--space-4);
  }
  
  .notice-icon {
    margin: 0 auto;
  }
}

@media (max-width: 480px) {
  .pattern-stats {
    grid-template-columns: 1fr 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .price-estimate {
    flex-direction: column;
    gap: var(--space-3);
    text-align: center;
  }
  
  .estimate-value {
    font-size: 1.5rem;
  }
  
  .auth-box {
    padding: var(--space-5);
  }
  
  .auth-box h1 {
    font-size: 1.5rem;
  }
  
  .form-group input {
    padding: var(--space-3);
  }
}