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

:root {
  --primary: #ff6b9d;
  --primary-dark: #e91e63;
  --secondary: #ffb6c1;
  --bg-pink: #fff0f5;
  --bg-light: #fff8fa;
  --text-dark: #2d1b2e;
  --text-gray: #666;
  --white: #ffffff;
  --shadow: 0 4px 20px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.15);
  --radius: 16px;
  --radius-lg: 24px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: var(--bg-pink);
  color: var(--text-dark);
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  background: linear-gradient(135deg, #fff0f5 0%, #ffe4ec 50%, #fff8fa 100%);
  padding: 20px 0 60px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255,182,193,0.3) 0%, transparent 70%);
  border-radius: 50%;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto 60px;
  padding: 0 20px;
}

.logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary-dark);
}

.menu a {
  color: var(--text-dark);
  text-decoration: none;
  margin-left: 30px;
  font-weight: 500;
  transition: color 0.3s;
}

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

.hero-content {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
  padding: 0 20px;
  position: relative;
  z-index: 1;
}

.hero-content .tag {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 14px;
  margin-bottom: 24px;
}

.hero-content h1 {
  font-size: 48px;
  line-height: 1.2;
  margin-bottom: 24px;
  background: linear-gradient(135deg, var(--text-dark), var(--primary-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content .lead {
  font-size: 18px;
  color: var(--text-gray);
  margin-bottom: 40px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 60px;
}

.btn-primary, .btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 16px 32px;
  border-radius: 30px;
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all 0.3s;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  box-shadow: 0 4px 15px rgba(233, 30, 99, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(233, 30, 99, 0.5);
}

.btn-primary:disabled {
  background: #ccc;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-secondary {
  background: white;
  color: var(--primary-dark);
  border: 2px solid var(--secondary);
}

.btn-secondary:hover {
  background: var(--bg-pink);
  border-color: var(--primary);
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 60px;
  padding: 30px;
  background: rgba(255,255,255,0.8);
  border-radius: var(--radius-lg);
  max-width: 600px;
  margin: 0 auto;
  backdrop-filter: blur(10px);
}

.stat {
  text-align: center;
}

.stat .num {
  display: block;
  font-size: 32px;
  font-weight: 700;
  color: var(--primary-dark);
}

.stat span:last-child {
  font-size: 14px;
  color: var(--text-gray);
}

/* Section Styles */
section {
  padding: 80px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 50px;
}

.section-title h2 {
  font-size: 36px;
  margin-bottom: 12px;
}

.section-title p {
  color: var(--text-gray);
  font-size: 16px;
}

/* Generator Section */
.generator-section {
  background: var(--white);
}

.generator-panel {
  max-width: 900px;
  margin: 0 auto;
}

.upload-area {
  margin-bottom: 40px;
}

.upload-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.upload-box {
  width: 280px;
  height: 320px;
  border: 3px dashed var(--secondary);
  border-radius: var(--radius-lg);
  position: relative;
  cursor: pointer;
  transition: all 0.3s;
  overflow: hidden;
  background: var(--bg-light);
}

.upload-box:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.upload-box.has-image {
  border-style: solid;
  border-color: var(--primary);
}

.upload-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
  text-align: center;
}

.avatar-icon {
  font-size: 64px;
  margin-bottom: 16px;
}

.upload-placeholder p {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.upload-placeholder span {
  font-size: 13px;
  color: var(--text-gray);
}

.upload-preview {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  display: none;
}

.upload-box.has-image .upload-preview {
  display: block;
}

.upload-box.has-image .upload-placeholder {
  display: none;
}

.reupload-btn {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.7);
  color: white;
  border: none;
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 13px;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.3s;
  z-index: 10;
}

.upload-box.has-image:hover .reupload-btn {
  opacity: 1;
}

.upload-connector {
  font-size: 48px;
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

/* Style Selection */
.style-section {
  margin-bottom: 40px;
}

.style-section h3 {
  text-align: center;
  margin-bottom: 24px;
  font-size: 20px;
}

.style-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 16px;
}

.style-card {
  background: var(--bg-light);
  border: 2px solid transparent;
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s;
}

.style-card:hover {
  border-color: var(--secondary);
  transform: translateY(-4px);
}

.style-card.active {
  border-color: var(--primary);
  background: linear-gradient(135deg, #fff0f5, #ffe4ec);
}

.style-card .style-icon {
  font-size: 40px;
  margin-bottom: 12px;
}

.style-card .style-name {
  font-weight: 600;
  color: var(--text-dark);
}

/* Submit Area */
.submit-area {
  text-align: center;
}

.generate-btn {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  border: none;
  padding: 20px 60px;
  border-radius: 50px;
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s;
  box-shadow: 0 4px 20px rgba(233, 30, 99, 0.4);
}

.generate-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(233, 30, 99, 0.5);
}

.generate-btn:disabled {
  background: #ccc;
  cursor: not-allowed;
  box-shadow: none;
}

.submit-hint {
  margin-top: 16px;
  color: var(--text-gray);
  font-size: 14px;
}

/* Result Panel */
.result-panel {
  margin-top: 50px;
  padding: 40px;
  background: var(--bg-light);
  border-radius: var(--radius-lg);
  text-align: center;
}

.result-panel h3 {
  font-size: 24px;
  margin-bottom: 30px;
}

.result-container {
  max-width: 600px;
  margin: 0 auto;
}

.result-image-wrapper {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  margin-bottom: 24px;
  background: var(--bg-pink);
  min-height: 400px;
}

.result-image-wrapper img {
  width: 100%;
  height: auto;
  display: block;
}

.result-loading {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.95);
}

.spinner {
  width: 60px;
  height: 60px;
  border: 4px solid var(--secondary);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 20px;
}

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

.result-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Showcase Section */
.showcase-section {
  background: var(--bg-pink);
}

.showcase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.showcase-item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: transform 0.3s;
}

.showcase-item:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.showcase-item img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  transition: transform 0.3s;
}

.showcase-item:hover img {
  transform: scale(1.05);
}

.showcase-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 20px;
  background: linear-gradient(transparent, rgba(0,0,0,0.7));
}

.showcase-overlay .tag {
  display: inline-block;
  background: var(--primary);
  color: white;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
}

/* FAQ Section */
.faq-section {
  background: var(--white);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: grid;
  gap: 20px;
}

.faq-item {
  background: var(--bg-light);
  padding: 24px;
  border-radius: var(--radius);
}

.faq-item h4 {
  font-size: 18px;
  margin-bottom: 12px;
  color: var(--text-dark);
}

.faq-item p {
  color: var(--text-gray);
  line-height: 1.8;
}

/* Footer */
.footer {
  background: var(--text-dark);
  color: rgba(255,255,255,0.7);
  text-align: center;
  padding: 40px 0;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: rgba(0,0,0,0.8);
  color: white;
  padding: 16px 32px;
  border-radius: 30px;
  font-size: 14px;
  opacity: 0;
  transition: all 0.3s;
  z-index: 1000;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* Auth Buttons */
.auth-buttons {
  display: flex;
  gap: 12px;
}

.btn-login, .btn-register, .btn-logout {
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 14px;
  cursor: pointer;
  border: none;
  transition: all 0.3s;
}

.btn-login {
  background: transparent;
  color: var(--text-dark);
  border: 2px solid var(--secondary);
}

.btn-login:hover {
  background: var(--bg-pink);
  border-color: var(--primary);
}

.btn-register, .btn-logout {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
}

.btn-register:hover, .btn-logout:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(233, 30, 99, 0.4);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

#username-display {
  font-weight: 600;
  color: var(--text-dark);
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  z-index: 2000;
  align-items: center;
  justify-content: center;
}

.modal.show {
  display: flex;
}

.modal-content {
  background: white;
  padding: 40px;
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 400px;
  position: relative;
  box-shadow: var(--shadow-lg);
  animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 28px;
  cursor: pointer;
  color: var(--text-gray);
  transition: color 0.3s;
}

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

.modal-content h2 {
  text-align: center;
  margin-bottom: 30px;
  color: var(--text-dark);
}

.modal-content form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.modal-content input {
  padding: 14px 16px;
  border: 2px solid #e0e0e0;
  border-radius: 12px;
  font-size: 16px;
  transition: border-color 0.3s;
}

.modal-content input:focus {
  outline: none;
  border-color: var(--primary);
}

.modal-content button[type="submit"] {
  margin-top: 10px;
  padding: 14px;
  font-size: 16px;
}

.form-switch {
  text-align: center;
  margin-top: 20px;
  color: var(--text-gray);
}

.form-switch a {
  color: var(--primary-dark);
  text-decoration: none;
  font-weight: 600;
}

.form-switch a:hover {
  text-decoration: underline;
}

/* Login Notice */
.login-notice {
  background: linear-gradient(135deg, #fff0f5, #ffe4ec);
  border: 2px dashed var(--primary);
  border-radius: var(--radius);
  padding: 30px;
  text-align: center;
  margin-bottom: 30px;
}

.login-notice p {
  font-size: 16px;
  color: var(--text-dark);
}

.login-notice a {
  color: var(--primary-dark);
  font-weight: 600;
  text-decoration: none;
}

.login-notice a:hover {
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
  .hero-content h1 {
    font-size: 32px;
  }
  
  .nav .menu {
    display: none;
  }
  
  .hero-stats {
    gap: 30px;
    padding: 20px;
  }
  
  .upload-row {
    flex-direction: column;
  }
  
  .upload-connector {
    transform: rotate(90deg);
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .result-actions {
    flex-direction: column;
  }
  
  .showcase-grid {
    grid-template-columns: 1fr;
  }
  
  .auth-buttons {
    gap: 8px;
  }
  
  .btn-login, .btn-register {
    padding: 6px 14px;
    font-size: 13px;
  }
  
  .modal-content {
    padding: 30px 20px;
  }
}