/* Xiaohongshu Content Generator - Styles v3.0 (Hybrid 3-Column UI) */

:root {
  --xhs-red: #ff2442;
  --xhs-red-light: #ff6b81;
  --xhs-red-dark: #d41e3d;
  --bg-color: #f8f9fa;
  --card-bg: #ffffff;
  --text-primary: #333333;
  --text-secondary: #666666;
  --text-light: #999999;
  --border-color: #e8e8e8;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.12);
  --success: #28a745;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: linear-gradient(135deg, #fff5f6 0%, #f8f9fa 100%);
  min-height: 100vh;
  color: var(--text-primary);
  line-height: 1.6;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px;
}

/* Header */
.header {
  text-align: center;
  padding: 40px 20px;
  background: var(--card-bg);
  border-radius: 16px;
  box-shadow: var(--shadow);
  margin-bottom: 30px;
  position: relative;
  overflow: hidden;
}

.header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--xhs-red), #ff6b81, #ff2442);
}

.logo-section {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 8px;
}

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

.logo-icon {
  font-size: 48px;
  filter: drop-shadow(2px 2px 4px rgba(255, 36, 66, 0.3));
}

.logo h1 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.version-badge {
  background: linear-gradient(135deg, var(--xhs-red), var(--xhs-red-light));
  color: white;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
}

/* Platform Badges */
.platform-badges {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.platform-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: linear-gradient(135deg, #f8f9fa, #fff);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.3s ease;
}

.platform-badge:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.platform-badge.youtube:hover {
  border-color: #ff0000;
  color: #ff0000;
}

.platform-badge.tiktok:hover {
  border-color: #00f2ea;
  color: #00f2ea;
}

.platform-icon {
  width: 18px;
  height: 18px;
}

.platform-icon.youtube {
  color: #ff0000;
}

.platform-icon.tiktok {
  color: #000;
}

.platform-badge-separator {
  font-size: 18px;
  color: var(--text-light);
  font-weight: 300;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 14px;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}

/* Header Top - Logo + Auth */
.header-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  gap: 20px;
}

/* Auth Section */
.auth-section {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

/* Login Section (Logged Out) */
.login-section {
  display: flex;
  gap: 10px;
}

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

.welcome-text {
  font-size: 13px;
  color: var(--text-secondary);
  margin: 0 0 12px 0;
  font-weight: 500;
}

.login-buttons {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
}

.login-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  margin: 4px 0;
}

.login-divider::before,
.login-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-color), transparent);
}

.login-divider span {
  font-size: 12px;
  color: var(--text-light);
  font-weight: 500;
  text-transform: lowercase;
}

/* Social Login Buttons */
.social-login-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  border: none;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  color: white;
  min-width: 220px;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.social-login-btn::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 0.5s ease;
}

.social-login-btn:hover::before {
  left: 100%;
}

.social-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.google-btn {
  background: linear-gradient(135deg, #4285f4 0%, #3574d5 100%);
  box-shadow: 0 2px 8px rgba(66, 133, 244, 0.3);
}

.google-btn:hover {
  background: linear-gradient(135deg, #3574d5 0%, #2a5cb8 100%);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(66, 133, 244, 0.4);
}

.facebook-btn {
  background: linear-gradient(135deg, #1877f2 0%, #166fe5 100%);
  box-shadow: 0 2px 8px rgba(24, 119, 242, 0.3);
}

.facebook-btn:hover {
  background: linear-gradient(135deg, #166fe5 0%, #1359b8 100%);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(24, 119, 242, 0.4);
}

/* Logged In Section */
.logged-in-section {
  display: flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, #f8f9fa, #fff);
  padding: 6px 12px 6px 6px;
  border-radius: 30px;
  border: 1px solid var(--border-color);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 12px 4px 4px;
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--xhs-red-light);
  box-shadow: 0 2px 8px rgba(255, 36, 66, 0.2);
}

.user-name {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 14px;
  max-width: 150px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Logout Button */
.logout-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background: var(--card-bg);
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}

.logout-btn:hover {
  background: var(--xhs-red);
  border-color: var(--xhs-red);
  transform: rotate(-90deg);
}

.logout-icon {
  width: 18px;
  height: 18px;
  color: var(--text-secondary);
  transition: color 0.3s ease;
}

.logout-btn:hover .logout-icon {
  color: white;
}

/* Firebase Warning */
.firebase-warning {
  background: #fff3cd;
  border: 1px solid #ffc107;
  border-radius: 12px;
  padding: 20px;
  margin: 20px 0;
}

.firebase-warning h3 {
  color: #856404;
  margin-bottom: 12px;
  font-size: 16px;
}

.firebase-warning ol {
  margin-left: 20px;
  color: #856404;
  line-height: 1.8;
}

.firebase-warning code {
  background: rgba(0, 0, 0, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 12px;
}

.firebase-warning a {
  color: #0066cc;
  text-decoration: underline;
}

/* Input Section */
.input-section {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 40px;
  box-shadow: var(--shadow);
  margin-bottom: 30px;
  position: relative;
}

.input-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 20px;
  right: 20px;
  height: 3px;
  background: linear-gradient(90deg, var(--xhs-red), #ff6b81, var(--xhs-red));
  border-radius: 3px 3px 0 0;
}

.input-header {
  text-align: center;
  margin-bottom: 30px;
}

.input-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--xhs-red), var(--xhs-red-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.input-description {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0;
}

.input-group {
  margin-bottom: 24px;
}

.input-group label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
  font-size: 15px;
}

.label-icon {
  font-size: 18px;
}

.url-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-group input {
  width: 100%;
  padding: 16px 80px 16px 18px;
  border: 2px solid var(--border-color);
  border-radius: 12px;
  font-size: 14px;
  transition: all 0.3s ease;
  font-family: inherit;
  background: var(--card-bg);
}

.input-group input:focus {
  outline: none;
  border-color: var(--xhs-red);
  box-shadow: 0 0 0 3px rgba(255, 36, 66, 0.1);
}

.input-platform-icons {
  position: absolute;
  right: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
  pointer-events: none;
}

.platform-indicator {
  width: 20px;
  height: 20px;
  opacity: 0.5;
  transition: opacity 0.3s ease;
}

.platform-indicator.youtube {
  color: #ff0000;
}

.platform-indicator.tiktok {
  color: #000;
}

.platform-indicator:hover {
  opacity: 1;
}

.input-hint {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Generate Button */
.generate-btn {
  width: 100%;
  padding: 18px 24px;
  background: linear-gradient(135deg, var(--xhs-red), var(--xhs-red-light));
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(255, 36, 66, 0.3);
}

.generate-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  transition: left 0.5s ease;
}

.generate-btn:hover::before {
  left: 100%;
}

.generate-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(255, 36, 66, 0.4);
}

.generate-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-text {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-icon {
  font-size: 20px;
}

.btn-loading {
  display: flex;
  align-items: center;
  gap: 8px;
}

.loading-spinner {
  animation: spin 1s linear infinite;
  display: inline-block;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Progress Section */
.progress-section {
  background: var(--card-bg);
  padding: 24px;
  border-radius: 16px;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--border-color);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 20px;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--xhs-red), var(--xhs-red-light));
  transition: width 0.3s ease;
  border-radius: 4px;
}

.progress-steps {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}

.progress-step {
  flex: 1;
  min-width: 60px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 10px;
  border-radius: 8px;
  transition: all 0.3s ease;
  opacity: 0.5;
}

.progress-step.active {
  opacity: 1;
  background: rgba(255, 36, 66, 0.1);
}

.progress-step.completed {
  opacity: 1;
}

.progress-step.completed .step-icon {
  background: var(--success);
}

.step-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.step-label {
  font-size: 12px;
  color: var(--text-secondary);
  text-align: center;
}

/* Error Message */
.error-message {
  background: #f8d7da;
  border: 1px solid #f5c6cb;
  color: #721c24;
  padding: 16px 20px;
  border-radius: 12px;
  margin-bottom: 20px;
  font-size: 14px;
}

/* Results Section */
.results-section {
  display: block;
}

/* Summary Card */
.summary-card {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 24px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}

.summary-card h2 {
  font-size: 20px;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.summary-content {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.8;
}

.summary-content p {
  margin-bottom: 8px;
}

/* Versions Container - 3 Column Grid */
.versions-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}

/* Version Card */
.version-card {
  background: var(--card-bg);
  border-radius: 16px;
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

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

.version-card .card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  background: linear-gradient(135deg, #fff5f6, #fff);
  border-bottom: 2px solid var(--border-color);
}

.version-card .card-header h3 {
  font-size: 18px;
  color: var(--text-primary);
  font-weight: 700;
}

.copy-version-btn {
  padding: 8px 16px;
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  color: var(--text-secondary);
}

.copy-version-btn:hover {
  background: var(--xhs-red);
  color: white;
  border-color: var(--xhs-red);
}

.version-card .card-content {
  padding: 20px;
  flex: 1;
  overflow-y: auto;
  max-height: 600px;
}

/* Card Metadata Section */
.version-card .card-meta {
  padding: 12px 20px;
  background: linear-gradient(135deg, #f8f9fa, #fff);
  border-bottom: 1px solid var(--border-color);
  display: none;
}

.meta-section {
  margin-bottom: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.meta-section:last-child {
  margin-bottom: 0;
}

.meta-tag {
  display: inline-block;
  background: var(--bg-color);
  padding: 3px 8px;
  border-radius: 12px;
  font-size: 12px;
  margin: 2px 4px 2px 0;
  border: 1px solid var(--border-color);
}

.meta-tag.caution {
  background: #fff3cd;
  border-color: #ffc107;
  color: #856404;
}

.meta-score {
  display: inline-block;
  background: linear-gradient(135deg, var(--xhs-red), var(--xhs-red-light));
  color: white;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 11px;
  margin: 2px 4px 2px 0;
  font-weight: 600;
}

.version-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  line-height: 1.4;
}

.version-hook {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.6;
  white-space: pre-wrap;
}

.version-body {
  font-size: 14px;
  color: var(--text-primary);
  margin-bottom: 16px;
  line-height: 1.8;
  white-space: pre-wrap;
}

.version-cta {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.6;
  white-space: pre-wrap;
}

.version-hashtags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding-top: 12px;
  border-top: 1px solid var(--border-color);
}

/* Copy All Button */
.copy-all-btn-large {
  width: 100%;
  padding: 16px;
  background: linear-gradient(135deg, var(--xhs-red), var(--xhs-red-light));
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  margin-bottom: 20px;
}

.copy-all-btn-large:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 36, 66, 0.4);
}

/* Hashtag Item */
.hashtag-item {
  background: linear-gradient(135deg, #fff5f6, #fff);
  color: var(--xhs-red);
  padding: 4px 10px;
  border-radius: 16px;
  font-size: 12px;
  border: 1px solid rgba(255, 36, 66, 0.2);
  transition: all 0.2s ease;
}

.hashtag-item:hover {
  background: var(--xhs-red);
  color: white;
}

/* Footer */
.footer {
  text-align: center;
  padding: 40px 20px;
  background: var(--card-bg);
  border-radius: 16px;
  box-shadow: var(--shadow);
  margin-top: 40px;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.footer-main {
  color: var(--text-secondary);
  font-size: 14px;
  margin: 0;
}

.footer-features {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.feature-tag {
  background: linear-gradient(135deg, #f8f9fa, #fff);
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 12px;
  color: var(--text-secondary);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: rgba(51, 51, 51, 0.95);
  color: white;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 14px;
  opacity: 0;
  transition: all 0.3s ease;
  z-index: 1000;
}

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

/* Animations */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.generate-btn.loading {
  animation: pulse 1.5s infinite;
}

/* Responsive - Tablet */
@media (max-width: 1024px) {
  .versions-container {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Responsive - Mobile */
@media (max-width: 768px) {
  .container {
    padding: 15px;
  }

  .header {
    padding: 20px 15px;
  }

  .header-top {
    flex-direction: column;
    gap: 15px;
  }

  .logo-section {
    flex-direction: column;
    gap: 8px;
  }

  .logo {
    flex-direction: column;
    gap: 8px;
  }

  .logo h1 {
    font-size: 20px;
  }

  .logo-icon {
    font-size: 32px;
  }

  /* Auth section mobile */
  .auth-section {
    width: 100%;
    justify-content: center;
  }

  .login-section {
    width: 100%;
  }

  .login-wrapper {
    width: 100%;
  }

  .login-buttons {
    width: 100%;
  }

  .social-login-btn {
    width: 100%;
    min-width: unset;
    justify-content: center;
    padding: 12px 16px;
  }

  .logged-in-section {
    width: auto;
  }

  .user-info {
    width: auto;
    justify-content: center;
  }

  .user-name {
    max-width: 120px;
  }

  .logout-btn {
    width: 36px;
    height: 36px;
    padding: 0;
  }

  .input-section {
    padding: 24px 20px;
  }

  .input-header {
    margin-bottom: 20px;
  }

  .input-title {
    font-size: 18px;
  }

  .input-description {
    font-size: 13px;
  }

  .url-input-wrapper input {
    padding-right: 70px;
  }

  .versions-container {
    grid-template-columns: 1fr;
  }

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

  .copy-version-btn {
    width: 100%;
  }

  .progress-steps {
    gap: 5px;
  }

  .progress-step {
    min-width: 50px;
  }

  .step-label {
    font-size: 10px;
  }

  .version-card .card-content {
    max-height: none;
  }
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb {
  background: var(--xhs-red-light);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--xhs-red);
}