/* Global Design System */
@import url('https://fonts.googleapis.com/css2?family=Bricolage+Grotesque:opsz,wght@12..96,400..800&family=Karla:ital,wght@0,200..800;1,200..800&display=swap');

:root {
  --bg-primary: #0a0c10;
  --bg-secondary: #11141b;
  --bg-tertiary: #181d28;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(138, 92, 246, 0.4);
  
  --primary: #8a5cf6;
  --primary-glow: rgba(138, 92, 246, 0.2);
  --accent: #3b82f6;
  --accent-glow: rgba(59, 130, 246, 0.2);
  --gradient: linear-gradient(135deg, #8a5cf6 0%, #3b82f6 100%);
  
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Karla', sans-serif;
  --font-heading: 'Bricolage Grotesque', sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border: 2px solid var(--bg-primary);
  border-radius: var(--radius-sm);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

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

/* Header */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 12, 16, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
}

.header-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo img {
  display: none; /* Hide original image tag */
}

.logo::before {
  content: "";
  display: block;
  width: 36px;
  height: 36px;
  background-image: url('/assets/images/faceswap_logo.png');
  background-repeat: no-repeat;
  background-size: contain;
  background-position: center;
}

.logo::after {
  content: "FaceSwap";
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.03em;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 32px;
}

.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
}

.nav-links a:hover,
.nav-links .active {
  color: var(--text-primary);
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.2);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

/* Language Selector */
.lang-switcher {
  position: relative;
  cursor: pointer;
}

.lang-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: #fff;
  transition: var(--transition);
}

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

.lang-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 6px;
  min-width: 120px;
  display: none;
  flex-direction: column;
  gap: 4px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  z-index: 10;
}

.lang-dropdown a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  font-size: 14px;
  border-radius: 4px;
}

.lang-dropdown a:hover {
  background: var(--bg-tertiary);
  color: var(--primary);
}

.btn-login {
  background: var(--gradient);
  color: #fff;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-login:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(138, 92, 246, 0.4);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition);
}

/* Hero Section */
.hero-sec {
  padding: 80px 0;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 60px;
}

.hero-text h1 {
  font-size: 56px;
  margin-bottom: 24px;
  background: linear-gradient(135deg, #fff 30%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-text p {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.hero-image img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
}

/* Playground Widget */
.playground-sec {
  padding: 80px 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

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

.playground-title h2 {
  font-size: 38px;
  margin-bottom: 16px;
}

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

.widget-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.3);
}

.widget-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: flex-start;
}

/* Left panel uploaders */
.uploader-box-container {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.upload-panel {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: 30px;
  text-align: center;
  cursor: pointer;
  position: relative;
  transition: var(--transition);
  background: var(--bg-secondary);
  min-height: 200px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.upload-panel:hover {
  border-color: var(--primary);
  background: var(--bg-tertiary);
}

.upload-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  opacity: 0.6;
}

.upload-text {
  font-size: 14px;
  color: var(--text-secondary);
}

.upload-text span {
  color: var(--primary);
  font-weight: 600;
}

.img-preview {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: calc(var(--radius-md) - 2px);
  object-fit: contain;
  background: var(--bg-secondary);
  display: none;
}

.panel-title {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.close-preview {
  position: absolute;
  top: 10px;
  right: 10px;
  background: rgba(0, 0, 0, 0.7);
  border-radius: 50%;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 5;
  transition: var(--transition);
}

.close-preview img {
  width: 12px;
  height: 12px;
}

.close-preview:hover {
  background: #ef4444;
}

/* Demo Section */
.demo-section {
  margin-top: 16px;
}

.demo-title {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.demo-thumbs {
  display: flex;
  gap: 12px;
}

.demo-thumb {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
}

.demo-thumb:hover,
.demo-thumb.active {
  border-color: var(--primary);
  transform: scale(1.05);
}

/* Right panel results */
.result-box-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 30px;
  min-height: 440px;
  background: var(--bg-secondary);
  position: relative;
  overflow: hidden;
}

.result-placeholder {
  text-align: center;
}

.result-placeholder img {
  width: 80px;
  opacity: 0.2;
  margin-bottom: 20px;
}

.result-placeholder p {
  color: var(--text-muted);
  font-size: 14px;
}

.btn-swap {
  width: 100%;
  margin-top: 24px;
  padding: 16px;
  background: var(--gradient);
  border: none;
  border-radius: var(--radius-md);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 4px 20px var(--primary-glow);
  transition: var(--transition);
}

.btn-swap:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(138, 92, 246, 0.5);
}

/* Loading state */
.loading-box {
  display: none;
  text-align: center;
}

.spinner {
  width: 60px;
  height: 60px;
  margin: 0 auto 20px;
  animation: rotate 1.5s linear infinite;
}

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

.loading-text {
  font-weight: 600;
  color: var(--text-secondary);
}

/* Result display */
.result-display {
  display: none;
  width: 100%;
  height: 100%;
  text-align: center;
}

.result-display img {
  max-width: 100%;
  max-height: 320px;
  border-radius: var(--radius-sm);
  object-fit: contain;
  margin-bottom: 24px;
}

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: #22c55e;
  color: #fff;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(34, 197, 94, 0.3);
}

.btn-download:hover {
  background: #16a34a;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(34, 197, 94, 0.4);
}

/* Multi-face grid */
.mul-faces-grid {
  display: none;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 24px;
  padding: 16px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  justify-content: center;
}

.mul-face-item {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-secondary);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.mul-face-orig {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
}

.mul-face-arrow {
  width: 16px;
  height: 16px;
  opacity: 0.5;
}

.mul-face-target {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--bg-primary);
  border: 1px dashed var(--text-muted);
  cursor: pointer;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mul-face-target.has-image {
  border-style: solid;
  border-color: var(--primary);
}

.mul-face-target img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
}

/* Video Wrapper */
.video-preview-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #000;
  display: none;
}

.video-preview-wrapper video {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* How to Swap Section */
.how-sec {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header h2 {
  font-size: 38px;
  margin-bottom: 16px;
}

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

.how-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
}

.how-img img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  box-shadow: 0 15px 40px rgba(0,0,0,0.3);
}

.how-steps {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.step-card {
  display: flex;
  gap: 20px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 24px;
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.step-card:hover {
  transform: translateX(5px);
  border-color: var(--primary);
}

.step-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 18px;
  flex-shrink: 0;
}

.step-content h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.step-content p {
  color: var(--text-secondary);
  font-size: 14px;
}

/* FAQ Section */
.faq-sec {
  padding: 100px 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.faq-tabs {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-tab {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: var(--transition);
}

.faq-question {
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
  font-size: 16px;
  user-select: none;
}

.faq-question:hover {
  color: var(--primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
  padding: 0 24px;
  color: var(--text-secondary);
  font-size: 15px;
}

.faq-answer p {
  padding-bottom: 20px;
}

.faq-tab.active {
  border-color: var(--primary);
}

.faq-tab.active .faq-answer {
  max-height: 500px;
}

.faq-toggle-icon {
  font-size: 20px;
  transition: transform 0.3s;
}

.faq-tab.active .faq-toggle-icon {
  transform: rotate(45deg);
}

.faq-category-title {
  max-width: 800px;
  margin: 40px auto 20px;
  font-size: 20px;
  color: var(--primary);
}

/* Pricing Page specific styling */
.price-sec {
  padding: 80px 0;
}

.price-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
  margin-top: 50px;
}

.price-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 40px;
  text-align: center;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.price-card.featured {
  border-color: var(--primary);
  background: linear-gradient(180deg, var(--bg-secondary) 0%, rgba(138, 92, 246, 0.05) 100%);
  position: relative;
}

.price-card.featured::before {
  content: 'BEST CHOICE';
  position: absolute;
  top: 16px;
  right: 16px;
  background: var(--primary);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 4px;
}

.price-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 35px rgba(0,0,0,0.3);
}

.price-name {
  font-size: 20px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.price-amount {
  font-size: 48px;
  font-family: var(--font-heading);
  font-weight: 800;
  color: #fff;
  margin-bottom: 24px;
}

.price-features {
  list-style: none;
  text-align: left;
  margin-bottom: 40px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.price-features li {
  font-size: 14px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.price-features li::before {
  content: '✓';
  color: #22c55e;
  font-weight: bold;
}

.price-btn {
  width: 100%;
  padding: 14px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 15px;
  transition: var(--transition);
}

.price-btn.secondary {
  border: 1px solid var(--border-color);
  background: transparent;
  color: #fff;
}

.price-btn.secondary:hover {
  background: var(--bg-tertiary);
  border-color: var(--text-secondary);
}

.price-btn.primary {
  background: var(--gradient);
  color: #fff;
}

.price-btn.primary:hover {
  box-shadow: 0 5px 20px rgba(138, 92, 246, 0.4);
}

/* Contact/Purchase Form */
.form-sec {
  padding: 80px 0;
  background: var(--bg-secondary);
}

.form-card {
  max-width: 600px;
  margin: 0 auto;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 40px;
}

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

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 15px;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--border-focus);
}

/* Blog Listing Page */
.blog-sec {
  padding: 80px 0;
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 32px;
  margin-top: 50px;
}

.blog-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.blog-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary);
}

.blog-card-img {
  height: 220px;
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  overflow: hidden;
}

.blog-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.blog-card-content {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.blog-card-title {
  font-size: 20px;
  margin-bottom: 12px;
  line-height: 1.3;
}

.blog-card-excerpt {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 20px;
  flex-grow: 1;
}

.blog-card-link {
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Blog Post Detail Page styling */
.post-sec {
  padding: 80px 0;
}

.post-container {
  max-width: 800px;
  margin: 0 auto;
}

.post-header {
  position: static;
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border-bottom: none;
  z-index: auto;
  margin-bottom: 40px;
}

.post-header h1 {
  font-size: 44px;
  margin-bottom: 16px;
}

.post-meta {
  font-size: 14px;
  color: var(--text-muted);
}

.post-content {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.post-content h2 {
  font-size: 28px;
  color: #fff;
  margin: 40px 0 16px;
}

.post-content h3 {
  font-size: 22px;
  color: #fff;
  margin: 30px 0 12px;
}

.post-content p {
  margin-bottom: 24px;
}

.post-content ul,
.post-content ol {
  margin-bottom: 24px;
  padding-left: 24px;
}

.post-content li {
  margin-bottom: 10px;
}

.post-content img {
  width: 100%;
  border-radius: var(--radius-md);
  margin: 30px 0;
}

/* Footer */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 80px 0 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.8fr 1.2fr;
  gap: 40px;
  margin-bottom: 60px;
}

.footer-col h5 {
  font-size: 16px;
  color: #fff;
  margin-bottom: 24px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-col p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  font-size: 14px;
  color: var(--text-secondary);
}

.footer-links a:hover {
  color: #fff;
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
  color: var(--text-muted);
}

.social-icons {
  display: flex;
  gap: 16px;
}

.social-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.social-icon:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}

/* Responsive adjustments */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }
  
  .hero-text h1 {
    font-size: 42px;
  }
  
  .widget-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .how-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none; /* Mobile menu can toggled open in JS */
  }
  
  .menu-toggle {
    display: flex;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }
}