@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;800&display=swap');

:root {
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --gradient-1: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
  --gradient-2: linear-gradient(135deg, #3b82f6 0%, #2dd4bf 100%);
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --background: #f8fafc;
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.5);
}

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

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: 'Inter', sans-serif;
  background: var(--background);
  color: var(--text-primary);
  position: relative;
}

body::before,
body::after {
  content: '';
  position: fixed;
  width: 40vw;
  height: 40vw;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.15;
  z-index: 0;
}

body::before {
  background: var(--gradient-1);
  top: -10vw;
  left: -10vw;
  animation: float 8s ease-in-out infinite;
}

body::after {
  background: var(--gradient-2);
  bottom: -10vw;
  right: -10vw;
  animation: float 8s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(30px, 30px); }
}

.container {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
}

.grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4vw;
  width: min(90%, 1200px);
  margin: auto;
}

.left-section {
  padding: min(4vw, 40px);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border-radius: 24px;
  border: 1px solid var(--glass-border);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.1);
}

.error-code {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: min(8vw, 120px);
  font-weight: 800;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  color: transparent;
  margin-bottom: min(3vw, 30px);
  letter-spacing: -0.02em;
}

.circle {
  width: min(6vw, 80px);
  height: min(6vw, 80px);
  margin: 0 min(1vw, 15px);
  position: relative;
  animation: rotate 8s linear infinite;
}

.circle::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  padding: min(0.4vw, 4px);
  background: var(--gradient-1);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  animation: pulse 2s ease-in-out infinite;
}

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

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.1); opacity: 0.8; }
}

h1 {
  font-size: min(3vw, 2.5rem);
  font-weight: 700;
  margin: 0 0 min(2vw, 20px) 0;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  color: transparent;
}

p {
  font-size: min(1.8vw, 1.1rem);
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0 0 min(3vw, 30px) 0;
}

.home-btn {
  display: inline-flex;
  align-items: center;
  padding: min(1.5vw, 16px) min(3vw, 32px);
  background: var(--gradient-1);
  color: white;
  text-decoration: none;
  border-radius: 12px;
  font-weight: 600;
  font-size: min(1.6vw, 1rem);
  transition: all 0.3s ease;
  box-shadow: 0 10px 30px -10px var(--primary);
}

.home-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 20px 40px -15px var(--primary);
}

.btn-text {
  margin-right: min(1.2vw, 12px);
}

.arrow {
  transition: transform 0.3s ease;
}

.home-btn:hover .arrow {
  transform: translateX(8px);
}

.right-section {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
}

.decoration {
  position: relative;
  width: min(30vw, 400px);
  height: min(30vw, 400px);
  perspective: 1000px;
}

.line {
  position: absolute;
  background: var(--gradient-1);
  border-radius: 12px;
  height: min(0.8vw, 8px);
  opacity: 0.7;
  transform-style: preserve-3d;
  transition: all 0.5s ease;
}

.line-1 {
  width: 70%;
  top: 20%;
  right: 0;
  transform: translateZ(50px) rotateY(-15deg);
  animation: floatLine1 4s ease-in-out infinite;
}

.line-2 {
  width: 90%;
  top: 50%;
  left: 0;
  transform: translateZ(100px) rotateY(15deg);
  animation: floatLine2 4s ease-in-out infinite 0.5s;
}

.line-3 {
  width: 80%;
  bottom: 20%;
  right: 0;
  transform: translateZ(150px) rotateY(-15deg);
  animation: floatLine3 4s ease-in-out infinite 1s;
}

@keyframes floatLine1 {
  0%, 100% {
    transform: translateZ(50px) rotateY(-15deg) translateX(0);
  }
  50% {
    transform: translateZ(50px) rotateY(-15deg) translateX(-20px);
  }
}

@keyframes floatLine2 {
  0%, 100% {
    transform: translateZ(100px) rotateY(15deg) translateY(0);
  }
  50% {
    transform: translateZ(100px) rotateY(15deg) translateY(-15px);
  }
}

@keyframes floatLine3 {
  0%, 100% {
    transform: translateZ(150px) rotateY(-15deg) translateX(0) scaleX(1);
  }
  50% {
    transform: translateZ(150px) rotateY(-15deg) translateX(20px) scaleX(0.9);
  }
}

.decoration:hover .line {
  opacity: 0.9;
  filter: brightness(1.2);
}

.decoration:hover .line-1 {
  animation-duration: 3s;
}

.decoration:hover .line-2 {
  animation-duration: 2.5s;
}

.decoration:hover .line-3 {
  animation-duration: 2s;
}

@media (max-width: 968px) {
  .grid {
    grid-template-columns: 1fr;
    width: min(95%, 600px);
    gap: 0;
  }
  
  .right-section {
    display: none;
  }
  
  .left-section {
    padding: min(5vw, 30px);
    text-align: center;
  }
  
  .error-code {
    font-size: min(15vw, 100px);
  }
  
  h1 {
    font-size: min(6vw, 2rem);
  }
  
  p {
    font-size: min(4vw, 1rem);
    margin: 0 auto min(5vw, 30px) auto;
  }
  
  .home-btn {
    padding: min(3vw, 15px) min(6vw, 30px);
  }
}

@media (max-width: 480px) {
  .left-section {
    padding: 30px 20px;
  }

  .error-code {
    font-size: 70px;
  }
  
  .circle {
    width: 50px;
    height: 50px;
    margin: 0 8px;
  }
  
  h1 {
    font-size: 1.8rem;
  }
  
  p {
    font-size: 1rem;
  }
  
  .home-btn {
    padding: 15px 30px;
    font-size: 1rem;
  }
}