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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  overflow-x: hidden;
}

.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.header {
  padding: 2rem;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  text-align: center;
}

.header-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.header-subtitle {
  font-size: 1.1rem;
  opacity: 0.9;
}

.main-layout {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.sidebar {
  width: 30%;
  min-width: 280px;
  background: #f5f5f5;
  overflow-y: auto;
  border-right: 1px solid #ddd;
}

.style-list {
  padding: 1rem;
}

.style-item {
  padding: 1.2rem;
  margin-bottom: 0.8rem;
  background: white;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.style-item:hover {
  transform: translateX(4px);
  border-color: #667eea;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.style-item.active {
  border-color: #667eea;
  background: #f0f4ff;
  transform: translateX(4px);
}

.style-name {
  font-weight: 700;
  font-size: 1.1rem;
  color: #333;
  margin-bottom: 0.3rem;
}

.style-desc {
  font-size: 0.85rem;
  color: #666;
  line-height: 1.4;
}

.preview-area {
  flex: 1;
  position: relative;
  overflow: auto;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.preview-content {
  padding: 3rem;
  min-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.preview-card {
  max-width: 600px;
  width: 100%;
  position: relative;
  z-index: 10;
}

.preview-title {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  font-weight: 800;
}

.preview-text {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  line-height: 1.6;
}

.preview-nav {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.nav-link {
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s;
}

.preview-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.preview-btn {
  padding: 1rem 2rem;
  font-size: 1rem;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: all 0.3s;
}

/* NEOBRUTALISM */
.preview-neobrutalism {
  background: #FFE951;
}

.preview-neobrutalism .preview-card {
  background: white;
  border: 4px solid black;
  box-shadow: 8px 8px 0 black;
  padding: 2rem;
}

.preview-neobrutalism .preview-title {
  color: black;
  text-transform: uppercase;
  letter-spacing: -2px;
}

.preview-neobrutalism .preview-text {
  color: #333;
}

.preview-neobrutalism .nav-link {
  color: black;
  border-bottom: 3px solid black;
}

.preview-neobrutalism .preview-btn {
  background: #FF6B6B;
  border: 3px solid black;
  box-shadow: 4px 4px 0 black;
}

.preview-neobrutalism .preview-btn:hover {
  transform: translate(4px, 4px);
  box-shadow: 0 0 0 black;
}

/* MINIMALISM */
.preview-minimalism {
  background: #FAFAFA;
}

.preview-minimalism .preview-title {
  color: #1a1a1a;
  font-weight: 300;
  font-size: 2.5rem;
}

.preview-minimalism .preview-text {
  color: #666;
  font-weight: 300;
}

.preview-minimalism .nav-link {
  color: #1a1a1a;
}

.preview-minimalism .nav-link:hover {
  color: #00BFA5;
}

.preview-minimalism .preview-btn {
  background: white;
  border: 1px solid #ddd;
  color: #1a1a1a;
  padding: 0.8rem 2rem;
}

.preview-minimalism .preview-btn:hover {
  border-color: #00BFA5;
  color: #00BFA5;
}

/* MAXIMALISM */
.preview-maximalism {
  background: 
    repeating-linear-gradient(45deg, #FF6B9D 0px, #FF6B9D 20px, #C44569 20px, #C44569 40px),
    repeating-linear-gradient(-45deg, #FEC163 0px, #FEC163 20px, #F39C12 20px, #F39C12 40px);
  background-blend-mode: multiply;
}

.preview-maximalism .preview-card {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
  padding: 3rem;
  border-radius: 30px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3),
              inset 0 0 0 3px rgba(255,255,255,0.3);
  border: 5px solid #FFD700;
}

.preview-maximalism .preview-title {
  color: white;
  text-shadow: 3px 3px 0 #FF1493, 6px 6px 0 #00CED1;
}

.preview-maximalism .preview-text {
  color: white;
  font-weight: 600;
  text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
}

.preview-maximalism .nav-link {
  color: #FFD700;
  text-decoration: underline;
  text-decoration-color: #FF1493;
  text-decoration-thickness: 3px;
}

.preview-maximalism .preview-btn {
  background: linear-gradient(45deg, #FF6B9D, #FEC163, #67E6DC);
  color: white;
  border: 3px solid white;
  border-radius: 25px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.3);
  animation: maximalist-pulse 2s infinite;
}

@keyframes maximalist-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

/* GLASSMORPHISM */
.preview-glassmorphism {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.preview-glassmorphism .preview-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 20px;
  padding: 2.5rem;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.preview-glassmorphism .preview-title {
  color: white;
}

.preview-glassmorphism .preview-text {
  color: rgba(255, 255, 255, 0.9);
}

.preview-glassmorphism .nav-link {
  color: white;
  opacity: 0.8;
}

.preview-glassmorphism .nav-link:hover {
  opacity: 1;
}

.preview-glassmorphism .preview-btn {
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: white;
  border-radius: 12px;
}

.preview-glassmorphism .preview-btn:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* SKEUOMORPHISM */
.preview-skeuomorphism {
  background: 
    linear-gradient(rgba(101, 67, 33, 0.8), rgba(101, 67, 33, 0.8)),
    url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="200" height="200"><filter id="n"><feTurbulence baseFrequency="0.9" numOctaves="4"/></filter><rect width="200" height="200" filter="url(%23n)" opacity="0.3"/></svg>');
  background-size: cover;
}

.preview-skeuomorphism .preview-card {
  background: linear-gradient(145deg, #8B7355, #654321);
  padding: 2.5rem;
  border-radius: 15px;
  box-shadow: 
    inset 0 2px 4px rgba(255,255,255,0.2),
    inset 0 -2px 4px rgba(0,0,0,0.5),
    0 10px 30px rgba(0,0,0,0.4);
  border: 1px solid rgba(255,255,255,0.1);
}

.preview-skeuomorphism .preview-title {
  color: #F5DEB3;
  text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}

.preview-skeuomorphism .preview-text {
  color: #DEB887;
}

.preview-skeuomorphism .nav-link {
  color: #F5DEB3;
}

.preview-skeuomorphism .preview-btn {
  background: linear-gradient(180deg, #B8860B 0%, #8B6914 100%);
  color: #FFF8DC;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 8px;
  box-shadow: 
    0 2px 4px rgba(0,0,0,0.3),
    inset 0 1px 0 rgba(255,255,255,0.3);
  text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}

.preview-skeuomorphism .preview-btn:active {
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.3);
}

/* CLAYMORPHISM */
.preview-claymorphism {
  background: linear-gradient(135deg, #FFE5E5 0%, #E5F3FF 100%);
}

.preview-claymorphism .preview-card {
  background: linear-gradient(145deg, #fff0f5, #e8e8ff);
  padding: 2.5rem;
  border-radius: 30px;
  box-shadow: 
    15px 15px 30px rgba(163, 177, 198, 0.6),
    -15px -15px 30px rgba(255, 255, 255, 0.8);
}

.preview-claymorphism .preview-title {
  color: #555;
}

.preview-claymorphism .preview-text {
  color: #666;
}

.preview-claymorphism .nav-link {
  color: #667eea;
}

.preview-claymorphism .preview-btn {
  background: linear-gradient(145deg, #FFB6C1, #FFC0CB);
  color: white;
  border: none;
  border-radius: 20px;
  box-shadow: 
    8px 8px 16px rgba(163, 177, 198, 0.4),
    -8px -8px 16px rgba(255, 255, 255, 0.8);
}

.preview-claymorphism .preview-btn:hover {
  box-shadow: 
    4px 4px 8px rgba(163, 177, 198, 0.4),
    -4px -4px 8px rgba(255, 255, 255, 0.8);
}

/* CYBERPUNK */
.preview-cyberpunk {
  background: #0a0a0a;
  position: relative;
}

.preview-cyberpunk::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    linear-gradient(90deg, transparent 0%, rgba(0, 255, 255, 0.03) 50%, transparent 100%);
  animation: scan 8s linear infinite;
}

@keyframes scan {
  0% { transform: translateY(-100%); }
  100% { transform: translateY(100%); }
}

.preview-cyberpunk .preview-title {
  color: #00ffff;
  text-shadow: 0 0 10px #00ffff, 0 0 20px #00ffff, 0 0 30px #00ffff;
  font-family: 'Courier New', monospace;
  animation: glitch 3s infinite;
}

@keyframes glitch {
  0%, 100% { transform: translate(0); }
  20% { transform: translate(-2px, 2px); }
  40% { transform: translate(-2px, -2px); }
  60% { transform: translate(2px, 2px); }
  80% { transform: translate(2px, -2px); }
}

.preview-cyberpunk .preview-text {
  color: #ff00ff;
  font-family: 'Courier New', monospace;
}

.preview-cyberpunk .nav-link {
  color: #00ffff;
  text-shadow: 0 0 5px #00ffff;
}

.preview-cyberpunk .preview-btn {
  background: transparent;
  border: 2px solid #00ffff;
  color: #00ffff;
  box-shadow: 0 0 10px #00ffff, inset 0 0 10px rgba(0, 255, 255, 0.2);
  text-transform: uppercase;
  font-family: 'Courier New', monospace;
}

.preview-cyberpunk .preview-btn:hover {
  background: rgba(0, 255, 255, 0.1);
  box-shadow: 0 0 20px #00ffff, inset 0 0 20px rgba(0, 255, 255, 0.3);
}

/* RETRO/VAPORWAVE */
.preview-retro {
  background: linear-gradient(180deg, #FF6EC7 0%, #7873F5 50%, #4FACFE 100%);
  position: relative;
  overflow: hidden;
}

.retro-grid {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 50%;
  background: 
    linear-gradient(0deg, transparent 0%, rgba(255, 110, 199, 0.3) 100%),
    repeating-linear-gradient(0deg, #FF6EC7 0px, #FF6EC7 2px, transparent 2px, transparent 40px),
    repeating-linear-gradient(90deg, #FF6EC7 0px, #FF6EC7 2px, transparent 2px, transparent 40px);
  transform: perspective(500px) rotateX(60deg);
  transform-origin: bottom;
}

.preview-retro .preview-title {
  color: white;
  text-shadow: 
    0 0 10px #FF6EC7,
    0 0 20px #FF6EC7,
    0 0 30px #7873F5,
    3px 3px 0 #FF6EC7,
    6px 6px 0 #7873F5;
  font-family: 'Courier New', monospace;
  letter-spacing: 0.3rem;
}

.preview-retro .preview-text {
  color: #FFE5F1;
  font-family: 'Courier New', monospace;
}

.preview-retro .nav-link {
  color: white;
  text-shadow: 0 0 10px #FF6EC7;
}

.preview-retro .preview-btn {
  background: linear-gradient(135deg, #FF6EC7, #7873F5);
  border: 2px solid white;
  color: white;
  box-shadow: 0 0 20px rgba(255, 110, 199, 0.6);
  font-family: 'Courier New', monospace;
}

/* SWISS STYLE */
.preview-swiss {
  background: white;
}

.preview-swiss .preview-card {
  max-width: 800px;
}

.preview-swiss .preview-title {
  color: #000;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-weight: 700;
  font-size: 4rem;
  line-height: 0.9;
  margin-bottom: 2rem;
}

.preview-swiss .preview-text {
  color: #333;
  font-size: 1.1rem;
  line-height: 1.5;
  margin-left: 4rem;
}

.preview-swiss .nav-link {
  color: #000;
  font-weight: 700;
}

.preview-swiss .nav-link:hover {
  color: #FF0000;
}

.preview-swiss .preview-btn {
  background: #FF0000;
  color: white;
  border: none;
  border-radius: 0;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 700;
}

/* ORGANIC */
.preview-organic {
  background: 
    linear-gradient(135deg, #E8F5E9 0%, #FFF8E1 100%);
}

.preview-organic .preview-card {
  background: white;
  padding: 2.5rem;
  border-radius: 50% 20% / 20% 50%;
  box-shadow: 0 10px 30px rgba(76, 175, 80, 0.2);
}

.preview-organic .preview-title {
  color: #2E7D32;
  font-family: Georgia, serif;
}

.preview-organic .preview-text {
  color: #558B2F;
}

.preview-organic .nav-link {
  color: #2E7D32;
}

.preview-organic .preview-btn {
  background: linear-gradient(135deg, #66BB6A, #81C784);
  color: white;
  border: none;
  border-radius: 30px;
  box-shadow: 0 4px 15px rgba(76, 175, 80, 0.3);
}

/* MEMPHIS */
.preview-memphis {
  background: #FFE951;
  position: relative;
}

.memphis-shapes {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: hidden;
}

.memphis-shapes::before,
.memphis-shapes::after {
  content: '';
  position: absolute;
  border-radius: 50%;
}

.memphis-shapes::before {
  width: 200px;
  height: 200px;
  background: #FF6B6B;
  top: 10%;
  right: 10%;
}

.memphis-shapes::after {
  width: 150px;
  height: 150px;
  background: #4ECDC4;
  bottom: 15%;
  left: 5%;
}

.preview-memphis .preview-card {
  background: white;
  padding: 2rem;
  border: 5px solid #000;
  position: relative;
  transform: rotate(-2deg);
}

.preview-memphis .preview-title {
  color: #000;
  transform: rotate(2deg);
}

.preview-memphis .preview-text {
  color: #333;
}

.preview-memphis .nav-link {
  color: #FF6B6B;
  font-weight: 900;
}

.preview-memphis .preview-btn {
  background: #4ECDC4;
  border: 4px solid #000;
  color: #000;
  font-weight: 900;
  transform: rotate(-3deg);
  box-shadow: 5px 5px 0 #FF6B6B;
}

.preview-memphis .preview-btn:nth-child(2) {
  background: #FF6B6B;
  transform: rotate(2deg);
  box-shadow: 5px 5px 0 #4ECDC4;
}

.preview-memphis .preview-btn:nth-child(3) {
  background: #95E1D3;
  transform: rotate(-1deg);
  box-shadow: 5px 5px 0 #000;
}

/* DARK MODE */
.preview-darkmode {
  background: #000;
}

.preview-darkmode .preview-title {
  color: white;
  font-weight: 200;
}

.preview-darkmode .preview-text {
  color: #ccc;
}

.preview-darkmode .nav-link {
  color: white;
}

.preview-darkmode .nav-link:hover {
  color: #4CAF50;
}

.preview-darkmode .preview-btn {
  background: transparent;
  border: 1px solid white;
  color: white;
}

.preview-darkmode .preview-btn:hover {
  background: white;
  color: #000;
}

/* MATERIAL DESIGN */
.preview-material {
  background: #FAFAFA;
}

.preview-material .preview-card {
  background: white;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1), 0 8px 16px rgba(0,0,0,0.1);
  transition: box-shadow 0.3s;
}

.preview-material .preview-card:hover {
  box-shadow: 0 4px 8px rgba(0,0,0,0.12), 0 16px 32px rgba(0,0,0,0.12);
}

.preview-material .preview-title {
  color: #1976D2;
}

.preview-material .preview-text {
  color: #424242;
}

.preview-material .nav-link {
  color: #1976D2;
}

.preview-material .preview-btn {
  background: #2196F3;
  color: white;
  border: none;
  border-radius: 4px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
  transition: all 0.3s;
}

.preview-material .preview-btn:hover {
  box-shadow: 0 4px 8px rgba(0,0,0,0.3);
  transform: translateY(-2px);
}

/* FUTURISTIC MINIMAL */
.preview-futuristic {
  background: linear-gradient(135deg, #0F2027 0%, #203A43 50%, #2C5364 100%);
}

.preview-futuristic .preview-card {
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 2.5rem;
}

.preview-futuristic .preview-title {
  color: white;
  font-weight: 100;
  letter-spacing: 0.5rem;
  background: linear-gradient(90deg, #667eea, #764ba2, #f093fb);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.preview-futuristic .preview-text {
  color: rgba(255, 255, 255, 0.7);
  font-weight: 300;
}

.preview-futuristic .nav-link {
  color: rgba(255, 255, 255, 0.8);
}

.preview-futuristic .preview-btn {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: white;
  backdrop-filter: blur(10px);
}

.preview-futuristic .preview-btn:hover {
  border-color: #667eea;
  box-shadow: 0 0 20px rgba(102, 126, 234, 0.3);
}

/* Y2K WEBCORE */
.preview-y2k {
  background: 
    radial-gradient(circle at 20% 50%, rgba(0, 150, 255, 0.3), transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(255, 0, 200, 0.3), transparent 50%),
    linear-gradient(180deg, #4A90E2 0%, #C850C0 100%);
}

.preview-y2k .preview-card {
  background: rgba(255, 255, 255, 0.9);
  padding: 2rem;
  border-radius: 15px;
  border: 3px solid white;
  box-shadow: 0 0 30px rgba(255, 255, 255, 0.5);
}

.preview-y2k .preview-title {
  color: #4A90E2;
  font-family: 'Comic Sans MS', cursive;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
  background: linear-gradient(90deg, #4A90E2, #C850C0, #4A90E2);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.preview-y2k .preview-text {
  color: #333;
}

.preview-y2k .nav-link {
  color: #4A90E2;
  text-decoration: underline;
}

.preview-y2k .preview-btn {
  background: linear-gradient(180deg, #E0E0E0, #B0B0B0);
  border: 2px solid white;
  color: #333;
  border-radius: 20px;
  box-shadow: 
    inset 0 1px 0 rgba(255, 255, 255, 0.8),
    0 3px 0 rgba(0, 0, 0, 0.2),
    0 6px 12px rgba(0, 0, 0, 0.3);
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.5);
}

.preview-y2k .preview-btn:active {
  transform: translateY(2px);
  box-shadow: 
    inset 0 1px 0 rgba(255, 255, 255, 0.8),
    0 1px 0 rgba(0, 0, 0, 0.2),
    0 2px 4px rgba(0, 0, 0, 0.3);
}

.footer {
  padding: 1.5rem;
  text-align: center;
  background: #f5f5f5;
  border-top: 1px solid #ddd;
  transition: all 0.4s;
}

.footer a {
  color: #667eea;
  text-decoration: none;
  font-weight: 600;
}

.footer a:hover {
  text-decoration: underline;
}

/* Footer style adaptations */
.footer-neobrutalism {
  background: #FFE951;
  border-top: 4px solid black;
}

.footer-minimalism {
  background: white;
  border-top: 1px solid #eee;
}

.footer-cyberpunk {
  background: #0a0a0a;
  border-top: 1px solid #00ffff;
  color: #00ffff;
}

.footer-cyberpunk a {
  color: #00ffff;
}

.footer-darkmode {
  background: #1a1a1a;
  border-top: 1px solid #333;
  color: white;
}

.footer-darkmode a {
  color: #4CAF50;
}

/* Mobile styles */
@media (max-width: 768px) {
  .header-title {
    font-size: 1.8rem;
  }

  .header-subtitle {
    font-size: 0.9rem;
  }

  .main-layout {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    min-width: auto;
    max-height: 40vh;
    border-right: none;
    border-bottom: 1px solid #ddd;
  }

  .preview-content {
    padding: 2rem 1rem;
  }

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

  .preview-text {
    font-size: 1rem;
  }

  .preview-buttons {
    flex-direction: column;
  }

  .preview-btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .header {
    padding: 1rem;
  }

  .header-title {
    font-size: 1.5rem;
  }

  .style-item {
    padding: 1rem;
  }

  .preview-title {
    font-size: 1.5rem;
  }
}