:root {
  --primary: #4f46e5;
  --primary-light: #6366f1;
  --primary-dark: #4338ca;
  --primary-50: #eef2ff;
  --secondary: #8b5cf6;
  --accent: #ec4899;
  --light: #f8fafc;
  --lighter: #f1f5f9;
  --dark: #0f172a;
  --darker: #020617;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --gray: #64748b;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  --border-radius: 8px;
  --border-radius-lg: 12px;
  --shadow-sm: 0 1px 3px 0 rgba(0,0,0,0.05);
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.08), 0 2px 4px -1px rgba(0,0,0,0.04);
  --shadow-md: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -2px rgba(0,0,0,0.03);
  --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.08), 0 10px 10px -5px rgba(0,0,0,0.02);
  --shadow-xl: 0 25px 50px -12px rgba(0,0,0,0.15);
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.5;
  background-color: var(--light);
  color: var(--dark);
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header Styles */
header {
  background-color: white;
  box-shadow: var(--shadow-sm);
  padding: 16px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--gray-200);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo-text {
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  font-size: 25px;
  color: var(--dark);
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.btn-get-key {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  background: white;
  color: var(--primary);
  border: 1px solid var(--gray-200);
  border-radius: var(--border-radius);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  box-shadow: var(--shadow-sm);
}

.btn-get-key:hover {
  background: var(--gray-100);
  border-color: var(--primary-light);
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 120px 0 80px;
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.03), rgba(139, 92, 246, 0.03));
  border-bottom: 1px solid var(--gray-200);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -50px;
  right: -50px;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(79, 70, 229, 0.1) 0%, rgba(255, 255, 255, 0) 70%);
  z-index: 0;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -100px;
  left: -100px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.1) 0%, rgba(255, 255, 255, 0) 70%);
  z-index: 0;
}

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

.hero h1 {
  font-family: 'Poppins', sans-serif;
  font-size: 56px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 24px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.5px;
}

.hero p {
  font-size: 22px;
  color: var(--gray-600);
  max-width: 700px;
  margin: 0 auto 48px;
  font-weight: 400;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--primary-50);
  color: var(--primary);
  padding: 8px 16px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 16px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

.hero-badge i {
  font-size: 18px;
}

/* Main Content */
.main-content {
  padding: 80px 0;
}

.content-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

/* Card Styles */
.card {
  background: white;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
  padding: 40px;
  transition: var(--transition-slow);
  border: 1px solid var(--gray-200);
  position: relative;
  overflow: hidden;
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.card-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--gray-200);
}

.card-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.card-title {
  font-family: 'Poppins', sans-serif;
  font-size: 24px;
  font-weight: 600;
  color: var(--gray-900);
  line-height: 1.3;
}

/* Form Styles */
.form-group {
  margin-bottom: 28px;
}

label {
  display: block;
  font-weight: 500;
  color: var(--gray-800);
  margin-bottom: 10px;
  font-size: 15px;
}

.input-group {
  position: relative;
}

input[type="text"],
input[type="password"],
textarea {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--gray-300);
  border-radius: var(--border-radius);
  font-size: 16px;
  transition: var(--transition);
  background-color: white;
  color: var(--gray-800);
}

input[type="text"]:focus,
input[type="password"]:focus,
textarea:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
  outline: none;
}

.toggle-password {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--gray-400);
  cursor: pointer;
  padding: 8px;
  transition: var(--transition);
}

.toggle-password:hover {
  color: var(--primary);
}

/* Platform Selection */
.platform-selection {
  display: flex;
  gap: 16px;
  margin-bottom: 28px;
}

.platform-option {
  flex: 1;
  position: relative;
}

.platform-option input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.platform-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
  border: 2px solid var(--gray-200);
  border-radius: var(--border-radius-lg);
  cursor: pointer;
  transition: var(--transition-slow);
  background-color: white;
  text-align: center;
  height: 100%;
}

.platform-option input[type="radio"]:checked + .platform-label {
  border-color: var(--primary);
  background-color: rgba(79, 70, 229, 0.03);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.platform-option input[type="radio"]:focus + .platform-label {
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.platform-icon {
  font-size: 32px;
  margin-bottom: 12px;
  color: var(--gray-600);
}

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

.platform-name {
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: 8px;
}

.platform-description {
  color: var(--gray-500);
  font-size: 14px;
}

/* File Upload */
.file-upload {
  border: 2px dashed var(--gray-300);
  border-radius: var(--border-radius-lg);
  padding: 60px 20px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition-slow);
  background-color: white;
  position: relative;
}

.file-upload:hover {
  border-color: var(--primary);
  background-color: rgba(79, 70, 229, 0.02);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.file-upload i {
  font-size: 48px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 20px;
}

.file-upload p {
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: 8px;
  font-size: 20px;
}

.file-upload small {
  color: var(--gray-500);
  font-size: 15px;
}

#fileInput {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

/* Preview Section */
.preview-section {
  margin-top: 40px;
}

.preview-card-container {
  background: white;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
  padding: 32px;
  border: 1px solid var(--gray-200);
}

.preview-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--gray-200);
}

.preview-header h3 {
  font-family: 'Poppins', sans-serif;
  font-size: 20px;
  font-weight: 600;
  color: var(--gray-900);
  display: flex;
  align-items: center;
  gap: 12px;
}

.preview-header h3 span {
  background-color: var(--primary);
  color: white;
  border-radius: 12px;
  padding: 4px 12px;
  font-size: 14px;
  font-weight: 500;
}

.btn-danger {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  background-color: white;
  color: var(--danger);
  border: 1px solid var(--gray-200);
  border-radius: var(--border-radius);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.btn-success {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  background-color: white;
  color: var(--success);
  border: 1px solid var(--gray-200);
  border-radius: var(--border-radius);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  margin-left: 12px;
}

.btn-danger:hover {
  background-color: #fef2f2;
  border-color: var(--danger);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.btn-success:hover {
  background-color: #ecfdf5;
  border-color: var(--success);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.preview-container {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.preview-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background-color: white;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
  transition: var(--transition);
}

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

.preview-image {
  width: 64px;
  height: 64px;
  object-fit: cover;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
}

.preview-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  color: var(--gray-800);
  min-width: 0;
}

.preview-name {
  font-size: 16px;
  font-weight: 500;
  color: var(--gray-900);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.preview-details {
  display: flex;
  gap: 8px;
  font-size: 14px;
  color: var(--gray-500);
  margin-top: 6px;
}

.preview-details span {
  background-color: var(--gray-100);
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 13px;
}

.delete-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: white;
  color: var(--gray-500);
  border: 1px solid var(--gray-200);
  border-radius: 50%;
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
}

.delete-btn:hover {
  background: #fef2f2;
  color: var(--danger);
  border-color: var(--danger);
  transform: scale(1.1);
}

/* Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 16px 32px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  border: none;
  border-radius: var(--border-radius);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-slow);
  box-shadow: var(--shadow);
  letter-spacing: 0.2px;
}

.btn:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

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

.btn-block {
  display: flex;
  width: 100%;
  text-align: center;
  margin-bottom: 32px;
}

.btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: var(--shadow) !important;
}

/* Customization Section */
.customization-section {
  margin-top: 40px;
}

.customization-card {
  background: white;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
  padding: 32px;
  margin-bottom: 32px;
  border: 1px solid var(--gray-200);
}

.customization-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.customization-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}

.customization-title {
  font-family: 'Poppins', sans-serif;
  font-size: 20px;
  font-weight: 600;
  color: var(--gray-900);
}

.keyword-input-group {
  margin-bottom: 20px;
}

.keyword-input-label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  font-weight: 500;
  color: var(--gray-800);
  font-size: 16px;
}

.keyword-input-label i {
  color: var(--primary);
  font-size: 18px;
}

.keyword-input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--gray-300);
  border-radius: var(--border-radius);
  font-size: 16px;
  transition: var(--transition);
}

.keyword-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.keyword-hint {
  font-size: 14px;
  color: var(--gray-500);
  margin-top: 8px;
}

/* Loading State */
.loading {
  display: none;
  text-align: center;
  padding: 60px;
  margin: 32px 0;
  background-color: white;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-200);
}

.spinner {
  width: 56px;
  height: 56px;
  border: 5px solid rgba(79, 70, 229, 0.1);
  border-top: 5px solid var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 24px;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.loading p {
  color: var(--gray-600);
  font-size: 20px;
  font-weight: 500;
}

.progress-container {
  width: 100%;
  background-color: var(--gray-200);
  border-radius: 8px;
  margin-top: 16px;
}

#progressBar {
  height: 8px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 8px;
  width: 0%;
  transition: width 0.3s ease;
}

/* Results Section */
.result-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-top: 40px;
}

.result-card {
  background: white;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
  padding: 32px;
  animation: fadeIn 0.5s ease;
  border: 1px solid var(--gray-200);
  transition: var(--transition-slow);
}

.result-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

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

.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--gray-200);
}

.result-title {
  font-family: 'Poppins', sans-serif;
  font-size: 20px;
  font-weight: 600;
  color: var(--gray-900);
  display: flex;
  align-items: center;
  gap: 16px;
}

.result-title i {
  color: var(--primary);
  width: 36px;
  height: 36px;
  background-color: rgba(79, 70, 229, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
}

.result-item {
  margin-bottom: 24px;
}

.result-label {
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 16px;
}

.result-label i {
  color: var(--primary);
  width: 28px;
  height: 28px;
  background-color: rgba(79, 70, 229, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

.result-content {
  background: white;
  padding: 20px;
  border-radius: var(--border-radius);
  border-left: 3px solid var(--primary);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
}

.result-text {
  flex: 1;
  color: var(--gray-800);
  line-height: 1.7;
  font-size: 16px;
}

.keywords-container {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.keyword {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  padding: 8px 14px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

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

.btn-copy-field {
  padding: 10px 20px;
  background: white;
  color: var(--gray-600);
  font-size: 15px;
  font-weight: 500;
  border: 1px solid var(--gray-200);
  box-shadow: none;
  flex-shrink: 0;
  transition: var(--transition);
  border-radius: var(--border-radius);
}

.btn-copy-field:hover {
  background: var(--gray-100);
  color: var(--gray-900);
  border-color: var(--primary-light);
  transform: translateY(-1px);
}

/* API Guide */
.api-guide {
  background-color: var(--gray-100);
  border-radius: var(--border-radius-lg);
  padding: 24px;
  margin-top: 24px;
  border: 1px solid var(--gray-200);
}

.api-guide h3 {
  font-family: 'Poppins', sans-serif;
  font-size: 18px;
  margin-bottom: 16px;
  color: var(--gray-900);
}

.api-guide ol {
  padding-left: 24px;
  margin-bottom: 16px;
}

.api-guide li {
  margin-bottom: 12px;
  color: var(--gray-600);
  font-size: 15px;
  line-height: 1.6;
}

.api-guide a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
}

.api-guide a:hover {
  text-decoration: underline;
}

/* Features Section */
.features-section {
  margin: 80px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.feature-card {
  background: white;
  border-radius: var(--border-radius-lg);
  padding: 32px;
  border: 1px solid var(--gray-200);
  transition: var(--transition-slow);
  box-shadow: var(--shadow-sm);
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  margin-bottom: 20px;
}

.feature-title {
  font-family: 'Poppins', sans-serif;
  font-size: 18px;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 12px;
}

.feature-description {
  color: var(--gray-600);
  font-size: 15px;
  line-height: 1.6;
}

/* Footer */
footer {
  background-color: var(--gray-900);
  color: white;
  padding: 40px 0 20px;
  text-align: center;
  margin-top: 1px;
}

.footer-content {
  max-width: 800px;
  margin: 0 auto;
}

.footer-text {
  color: var(--gray-400);
  font-size: 15px;
  line-height: 1.6;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .preview-container {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }
}

@media (max-width: 768px) {
  .hero {
    padding: 100px 0 60px;
  }
  
  .hero h1 {
    font-size: 42px;
  }
  
  .hero p {
    font-size: 18px;
  }
  
  .card {
    padding: 32px;
  }

  .card-title {
    font-size: 22px;
  }

  .btn {
    padding: 14px 24px;
  }

  .platform-selection {
    flex-direction: column;
  }
}

@media (max-width: 640px) {
  .hero h1 {
    font-size: 36px;
  }
  
  .hero p {
    font-size: 16px;
  }

  .card {
    padding: 24px;
  }

  .card-title {
    font-size: 20px;
  }

  .preview-card-container {
    padding: 24px;
  }

  .result-card {
    padding: 24px;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 80px 0 40px;
  }
  
  .hero h1 {
    font-size: 32px;
  }
  
  .card {
    padding: 20px;
  }
  
  .file-upload {
    padding: 40px 16px;
  }
  
  .file-upload i {
    font-size: 40px;
  }
  
  .file-upload p {
    font-size: 18px;
  }

  .result-content {
    flex-direction: column;
    gap: 12px;
  }

  .btn-copy-field {
    width: 100%;
    justify-content: center;
  }

  .preview-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .preview-header div {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 8px;
  }

  .btn-danger, .btn-success {
    width: 100%;
    margin-left: 0;
  }
}

/* Animation for file upload */
@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

.pulse {
  animation: pulse 1.5s infinite;
}