/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #6366f1;
  --primary-dark: #4f46e5;
  --secondary-color: #8b5cf6;
  --accent-color: #06b6d4;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --text-light: #9ca3af;
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-dark: #111827;
  --border-color: #e5e7eb;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
    0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --gradient: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
}

body {
  font-family: "Inter", sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
}

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

/* Header Styles */
.header {
  background: var(--bg-primary);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: all 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-color);
  background-color: rgba(99, 102, 241, 0.1);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
}

.bar {
  width: 25px;
  height: 3px;
  background-color: var(--text-primary);
  margin: 3px 0;
  transition: 0.3s;
}

/* Hero Section */
.hero-section {
  background: var(--gradient);
  color: white;
  padding: 6rem 0;
  position: relative;
  overflow: hidden;
}

.hero-section .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.hero-subtitle {
  font-size: 1.25rem;
  opacity: 0.9;
  margin-bottom: 2rem;
}

.hero-stats {
  display: flex;
  gap: 2rem;
}

.stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 700;
}

.stat-label {
  font-size: 0.875rem;
  opacity: 0.8;
}

.hero-visual {
  position: relative;
  height: 300px;
}

.ai-visual {
  position: relative;
  width: 100%;
  height: 100%;
}

.floating-element {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  animation: float 6s ease-in-out infinite;
}

.element-1 {
  width: 80px;
  height: 80px;
  top: 20%;
  left: 20%;
  animation-delay: 0s;
}

.element-2 {
  width: 60px;
  height: 60px;
  top: 60%;
  left: 60%;
  animation-delay: 2s;
}

.element-3 {
  width: 100px;
  height: 100px;
  top: 40%;
  left: 40%;
  animation-delay: 4s;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-20px);
  }
}

/* Features Section */
.features-section {
  padding: 6rem 0;
  background: var(--bg-secondary);
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 3rem;
  color: var(--text-primary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.feature-card {
  background: var(--bg-primary);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  text-align: center;
}

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

.feature-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.feature-card p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.feature-link {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
}

.feature-link:hover {
  color: var(--primary-dark);
}

/* Page Hero */
.page-hero {
  background: var(--gradient);
  color: white;
  padding: 4rem 0;
  text-align: center;
}

.page-title {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.page-subtitle {
  font-size: 1.25rem;
  opacity: 0.9;
}

/* Tool Section */
.tool-section {
  padding: 4rem 0;
}

.tool-interface {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  max-width: 1000px;
  margin: 0 auto;
}

.input-section,
.output-section {
  background: var(--bg-primary);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.input-section h3,
.output-section h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

/* Form Elements */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-primary);
}

.form-input,
.form-select,
.form-textarea,
.prompt-input {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  font-size: 1rem;
  transition: border-color 0.3s ease;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus,
.prompt-input:focus {
  outline: none;
  border-color: var(--primary-color);
}

.prompt-input {
  min-height: 120px;
  resize: vertical;
}

/* Style Options */
.style-options {
  margin: 1.5rem 0;
}

.style-options h4 {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.style-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
}

.style-btn {
  padding: 0.75rem;
  border: 2px solid var(--border-color);
  background: var(--bg-primary);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.style-btn:hover {
  border-color: var(--primary-color);
  background: rgba(99, 102, 241, 0.05);
}

/* Upload Areas */
.upload-area {
  margin-bottom: 1.5rem;
}

.upload-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.upload-item h5 {
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.upload-box {
  border: 2px dashed var(--border-color);
  border-radius: 8px;
  padding: 2rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.3s ease;
}

.upload-box:hover {
  border-color: var(--primary-color);
}

.upload-icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.file-input {
  display: none;
}

/* Processing Options */
.processing-options {
  margin: 1.5rem 0;
}

.processing-options h4 {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.option-group {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.option-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
}

/* Buttons */
.generate-btn {
  width: 100%;
  padding: 1rem 2rem;
  background: var(--gradient);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.3s ease;
}

.generate-btn:hover {
  transform: translateY(-2px);
}

.action-btn {
  padding: 0.75rem 1.5rem;
  background: var(--primary-color);
  color: white;
  border: 2px solid var(--primary-color);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 500;
}

.action-btn:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* Output Sections */
.image-preview,
.ad-preview,
.video-preview,
.comparison-view,
.faceswap-view {
  background: var(--bg-secondary);
  border-radius: 8px;
  padding: 2rem;
  text-align: center;
  margin-bottom: 1.5rem;
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.placeholder-image,
.placeholder-ad,
.placeholder-video,
.image-placeholder {
  color: var(--text-light);
}

.comparison-view,
.faceswap-view {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.comparison-item h5,
.faceswap-item h5 {
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.output-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

/* Footer */
.footer {
  background: var(--bg-dark);
  color: white;
  padding: 4rem 0 2rem;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-description {
  opacity: 0.8;
  margin-bottom: 1.5rem;
}

.footer-subtitle {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

.social-links {
  display: flex;
  gap: 1rem;
}

.social-link {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: color 0.3s ease;
}

.social-link:hover {
  color: white;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  opacity: 0.7;
}

/* Reference Images Section */
.reference-images {
  margin: 1.5rem 0;
}

.reference-images h4 {
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.reference-images p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 0.875rem;
}

.image-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 1rem;
}

.image-slot {
  position: relative;
  aspect-ratio: 1;
  border: 2px dashed var(--border-color);
  border-radius: 8px;
  cursor: pointer;
  transition: border-color 0.3s ease;
  overflow: hidden;
}

.image-slot:hover {
  border-color: var(--primary-color);
}

.image-slot .file-input {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
  z-index: 10;
}

.upload-placeholder {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  background: var(--bg-secondary);
  cursor: pointer;
}

.plus-icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.upload-text {
  font-size: 0.875rem;
  text-align: center;
}

.preview-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.close-btn {
  position: absolute;
  top: 5px;
  right: 5px;
  width: 24px;
  height: 24px;
  background: #e531635e;
  color: #ff0060;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: normal;
  cursor: pointer;
  z-index: 20;
  transition: all 0.3s ease;
  opacity: 0;
  visibility: hidden;
}

.image-slot:hover .close-btn {
  opacity: 1;
  visibility: visible;
}

.close-btn:hover {
  background: rgba(0, 0, 0, 0.9);
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background-color: var(--bg-primary);
    width: 100%;
    text-align: center;
    transition: 0.3s;
    box-shadow: var(--shadow);
    padding: 2rem 0;
  }

  .nav-menu.active {
    left: 0;
  }

  .nav-toggle {
    display: flex;
  }

  .hero-section .container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-stats {
    justify-content: center;
  }

  .tool-interface {
    grid-template-columns: 1fr;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .upload-grid {
    grid-template-columns: 1fr;
  }

  .comparison-view,
  .faceswap-view {
    grid-template-columns: 1fr;
  }

  .output-actions {
    flex-direction: column;
  }

  .image-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 15px;
  }

  .hero-title {
    font-size: 2rem;
  }

  .page-title {
    font-size: 2rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .style-grid {
    grid-template-columns: 1fr;
  }

  .image-grid {
    grid-template-columns: 1fr;
  }
}