/* CSS Variables */
:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #111111;
  --bg-tertiary: #1a1a1a;
  --accent-primary: #ff00ff;
  --accent-secondary: #00ffff;
  --accent-success: #00ff88;
  --accent-danger: #ff0066;
  --text-primary: #ffffff;
  --text-secondary: #888888;
  --border-color: #222222;
  --glow-primary: rgba(255, 0, 255, 0.4);
  --glow-secondary: rgba(0, 255, 255, 0.4);
}

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

body {
  font-family: 'Space Mono', monospace;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

/* Animated Background */
.bg-graphics {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.bg-graphics::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 20%, rgba(255, 0, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(0, 255, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(0, 255, 136, 0.05) 0%, transparent 50%);
  animation: pulseGlow 10s ease-in-out infinite;
}

@keyframes pulseGlow {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

.wave-line {
  position: absolute;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, 
    transparent 0%, 
    var(--accent-primary) 50%, 
    transparent 100%);
  opacity: 0.2;
  animation: waveScan 8s linear infinite;
}

.wave-line:nth-child(1) {
  top: 25%;
  animation-delay: 0s;
}

.wave-line:nth-child(2) {
  top: 50%;
  animation-delay: 2.5s;
}

.wave-line:nth-child(3) {
  top: 75%;
  animation-delay: 5s;
}

@keyframes waveScan {
  0% {
    transform: translateY(-100vh);
    opacity: 0;
  }
  10% {
    opacity: 0.2;
  }
  90% {
    opacity: 0.2;
  }
  100% {
    transform: translateY(100vh);
    opacity: 0;
  }
}

.grid-overlay {
  position: absolute;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 50px 50px;
  opacity: 0.5;
}

/* Container */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem;
  position: relative;
  z-index: 1;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 4rem 0 3rem;
  animation: fadeInDown 0.8s ease;
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.logo-container {
  margin-bottom: 2rem;
}

.logo-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 
    0 10px 40px rgba(255, 0, 255, 0.3),
    0 0 60px rgba(0, 255, 255, 0.2);
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

.logo-icon svg {
  width: 45px;
  height: 45px;
  color: var(--bg-primary);
}

.title {
  font-family: 'Syne', sans-serif;
  font-size: clamp(3rem, 10vw, 6rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary), var(--accent-success));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientFlow 8s ease infinite;
  background-size: 200% 200%;
  line-height: 1;
}

@keyframes gradientFlow {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.subtitle {
  font-size: clamp(1rem, 2vw, 1.3rem);
  color: var(--text-secondary);
  letter-spacing: 0.05em;
  margin-bottom: 2rem;
}

.hero-description {
  max-width: 700px;
  margin: 0 auto;
  padding: 2rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  animation: fadeIn 1s ease 0.3s both;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.hero-description p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.8;
}

/* Section Titles */
.section-title {
  font-family: 'Syne', sans-serif;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 3rem;
  color: var(--text-primary);
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  border-radius: 2px;
}

/* Mode Selection */
.mode-selection {
  margin: 5rem 0;
  animation: fadeIn 1s ease 0.5s both;
}

.mode-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.mode-card {
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: 16px;
  padding: 2.5rem;
  position: relative;
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  opacity: 0;
  transform: translateY(30px);
}

.mode-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, 
    transparent 30%, 
    rgba(255, 0, 255, 0.1) 50%, 
    transparent 70%);
  transform: rotate(45deg);
  transition: all 0.6s ease;
  opacity: 0;
}

.mode-card:hover::before {
  opacity: 1;
  transform: rotate(45deg) translate(50%, 50%);
}

.mode-card:hover {
  border-color: var(--accent-primary);
  box-shadow: 
    0 20px 60px rgba(255, 0, 255, 0.3),
    0 0 80px rgba(0, 255, 255, 0.2);
  transform: translateY(-8px);
}

.mode-card[data-mode="detect"]:hover {
  border-color: var(--accent-secondary);
  box-shadow: 
    0 20px 60px rgba(0, 255, 255, 0.3),
    0 0 80px rgba(255, 0, 255, 0.2);
}

.mode-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, 
    rgba(255, 0, 255, 0.05) 0%, 
    rgba(0, 255, 255, 0.05) 100%);
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
}

.mode-card:hover .mode-overlay {
  opacity: 1;
}

.mode-icon {
  width: 70px;
  height: 70px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  box-shadow: 0 8px 20px rgba(255, 0, 255, 0.3);
  transition: all 0.3s ease;
}

.mode-card:hover .mode-icon {
  transform: scale(1.1) rotate(5deg);
  box-shadow: 0 12px 30px rgba(255, 0, 255, 0.5);
}

.mode-icon svg {
  width: 35px;
  height: 35px;
  color: var(--bg-primary);
}

.mode-content {
  margin-bottom: 2rem;
  position: relative;
  z-index: 1;
}

.mode-title {
  font-family: 'Syne', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.mode-description {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.mode-features {
  list-style: none;
  padding: 0;
}

.mode-features li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.feature-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background: rgba(0, 255, 136, 0.1);
  border: 1px solid var(--accent-success);
  border-radius: 50%;
  color: var(--accent-success);
  font-size: 0.75rem;
  flex-shrink: 0;
}

.mode-button {
  width: 100%;
  padding: 1rem 2rem;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border: none;
  border-radius: 8px;
  color: var(--bg-primary);
  font-family: 'Space Mono', monospace;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  transition: all 0.3s ease;
  position: relative;
  z-index: 1;
  overflow: hidden;
}

.mode-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, 
    transparent 0%, 
    rgba(255, 255, 255, 0.3) 50%, 
    transparent 100%);
  transition: left 0.5s ease;
}

.mode-button:hover::before {
  left: 100%;
}

.mode-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(255, 0, 255, 0.5);
}

.mode-button:active {
  transform: translateY(0);
}

.button-icon {
  font-size: 1.5rem;
  transition: transform 0.3s ease;
}

.mode-button:hover .button-icon {
  transform: translateX(5px);
}

/* Features Section */
.features-section {
  margin: 5rem 0;
  animation: fadeIn 1s ease 0.7s both;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.feature-item {
  text-align: center;
  padding: 2rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  transition: all 0.3s ease;
  opacity: 0;
  transform: translateY(30px);
}

.feature-item:hover {
  border-color: var(--accent-success);
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 255, 136, 0.2);
}

.feature-icon-circle {
  width: 60px;
  height: 60px;
  margin: 0 auto 1.5rem;
  background: rgba(0, 255, 136, 0.1);
  border: 2px solid var(--accent-success);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.feature-item:hover .feature-icon-circle {
  background: var(--accent-success);
  transform: rotate(360deg) scale(1.1);
}

.feature-icon-circle svg {
  width: 30px;
  height: 30px;
  color: var(--accent-success);
  transition: color 0.3s ease;
}

.feature-item:hover .feature-icon-circle svg {
  color: var(--bg-primary);
}

.feature-item h3 {
  font-family: 'Syne', sans-serif;
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.feature-item p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Footer */
.footer {
  margin-top: 5rem;
  padding: 3rem 0;
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.footer-content {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
}

.footer-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.footer-links {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.3s ease;
}

.footer-link:hover {
  color: var(--accent-primary);
}

.footer-divider {
  color: var(--border-color);
}

/* Responsive Design */
@media (max-width: 1024px) {
  .mode-grid {
    grid-template-columns: 1fr;
    max-width: 600px;
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 1.5rem;
  }

  .hero {
    padding: 3rem 0 2rem;
  }

  .logo-icon {
    width: 60px;
    height: 60px;
  }

  .logo-icon svg {
    width: 35px;
    height: 35px;
  }

  .title {
    font-size: 2.5rem;
  }

  .subtitle {
    font-size: 1rem;
  }

  .hero-description {
    padding: 1.5rem;
  }

  .mode-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .mode-card {
    padding: 2rem;
  }

  .mode-title {
    font-size: 1.6rem;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

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

@media (max-width: 480px) {
  .mode-grid {
    grid-template-columns: 1fr;
  }

  .mode-card {
    padding: 1.5rem;
  }

  .mode-icon {
    width: 60px;
    height: 60px;
  }

  .mode-icon svg {
    width: 30px;
    height: 30px;
  }

  .mode-title {
    font-size: 1.4rem;
  }

  .mode-description {
    font-size: 0.95rem;
  }

  .mode-button {
    padding: 0.9rem 1.5rem;
    font-size: 0.95rem;
  }

  .feature-item {
    padding: 1.5rem;
  }
}

/* Loading Animation */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Smooth Scrolling */
html {
  scroll-behavior: smooth;
}

/* Selection Color */
::selection {
  background: var(--accent-primary);
  color: var(--bg-primary);
}

::-moz-selection {
  background: var(--accent-primary);
  color: var(--bg-primary);
}