:root {
  --black: #0a0a0a;
  --dark-gray: #1a1a1a;
  --gold: #d4af37;
  --gold-light: #f4d03f;
  --gold-dark: #b8941e;
  --fire-orange: #ff6b35;
  --fire-red: #c41e3a;
  --white: #f5f5f5;
  --gray: #808080;

  --shadow-gold: 0 0 20px rgba(212, 175, 55, 0.3);
  --shadow-fire: 0 0 30px rgba(255, 107, 53, 0.4);
}

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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, var(--black) 0%, var(--dark-gray) 100%);
  color: var(--white);
  line-height: 1.6;
  min-height: 100vh;
}

nav {
  background: rgba(10, 10, 10, 0.95);
  padding: 1.5rem 2rem;
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 2px solid var(--gold);
  backdrop-filter: blur(10px);
}

nav .container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.8rem;
  font-weight: bold;
  background: linear-gradient(135deg, var(--gold) 0%, var(--fire-orange) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  letter-spacing: 2px;
  text-shadow: var(--shadow-gold);
}

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

.nav-links a {
  color: var(--white);
  text-decoration: none;
  transition: all 0.3s;
  padding: 0.5rem 1rem;
  border-radius: 5px;
}

.nav-links a:hover {
  color: var(--gold);
  background: rgba(212, 175, 55, 0.1);
  box-shadow: var(--shadow-gold);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

.hero {
  text-align: center;
  padding: 6rem 2rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 150%;
  height: 100%;
  background: radial-gradient(ellipse at center, rgba(212, 175, 55, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.hero h1 {
  font-size: 4rem;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--gold-light) 0%, var(--fire-orange) 50%, var(--fire-red) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: var(--shadow-fire);
  position: relative;
}

.hero p {
  font-size: 1.3rem;
  color: var(--gray);
  max-width: 600px;
  margin: 0 auto 2rem;
}

.cta-button {
  display: inline-block;
  padding: 1rem 2.5rem;
  background: linear-gradient(135deg, var(--gold) 0%, var(--fire-orange) 100%);
  color: var(--black);
  text-decoration: none;
  border-radius: 50px;
  font-weight: bold;
  font-size: 1.1rem;
  transition: all 0.3s;
  box-shadow: var(--shadow-gold);
  border: 2px solid transparent;
}

.cta-button:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-fire);
  border-color: var(--gold-light);
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin: 3rem 0;
}

.card {
  background: rgba(26, 26, 26, 0.8);
  border: 1px solid var(--gold-dark);
  border-radius: 15px;
  padding: 2rem;
  transition: all 0.3s;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-gold);
  border-color: var(--gold);
}

.card h3 {
  color: var(--gold);
  margin-bottom: 1rem;
  font-size: 1.5rem;
}

.card p {
  color: var(--gray);
  line-height: 1.8;
}

section {
  margin: 4rem 0;
  padding: 2rem 0;
}

section h2 {
  font-size: 2.5rem;
  margin-bottom: 2rem;
  color: var(--gold);
  border-bottom: 2px solid var(--gold-dark);
  padding-bottom: 1rem;
}

section h3 {
  font-size: 1.8rem;
  margin: 2rem 0 1rem;
  color: var(--gold-light);
}

section h4 {
  font-size: 1.3rem;
  margin: 1.5rem 0 0.5rem;
  color: var(--fire-orange);
}

pre, code {
  background: rgba(10, 10, 10, 0.9);
  border: 1px solid var(--gold-dark);
  border-radius: 8px;
  padding: 1rem;
  overflow-x: auto;
  font-family: 'Courier New', monospace;
  color: var(--gold-light);
}

code {
  padding: 0.2rem 0.5rem;
  font-size: 0.9rem;
}

.formula {
  background: rgba(26, 26, 26, 0.9);
  border-left: 4px solid var(--fire-orange);
  padding: 1.5rem;
  margin: 1.5rem 0;
  border-radius: 8px;
  box-shadow: var(--shadow-gold);
}

.formula-title {
  color: var(--gold);
  font-weight: bold;
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.formula-content {
  font-family: 'Courier New', monospace;
  color: var(--gold-light);
  font-size: 1.1rem;
  margin: 1rem 0;
  padding: 1rem;
  background: rgba(10, 10, 10, 0.6);
  border-radius: 5px;
}

.formula-explanation {
  color: var(--gray);
  font-size: 0.95rem;
  margin-top: 0.5rem;
  line-height: 1.6;
}

ul, ol {
  margin-left: 2rem;
  margin-bottom: 1rem;
}

li {
  margin: 0.5rem 0;
  color: var(--gray);
}

li strong {
  color: var(--gold);
}

a {
  color: var(--fire-orange);
  text-decoration: none;
  transition: color 0.3s;
}

a:hover {
  color: var(--gold-light);
  text-decoration: underline;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  background: rgba(26, 26, 26, 0.8);
  border-radius: 8px;
  overflow: hidden;
}

th, td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--gold-dark);
}

th {
  background: rgba(212, 175, 55, 0.1);
  color: var(--gold);
  font-weight: bold;
}

tr:hover {
  background: rgba(212, 175, 55, 0.05);
}

footer {
  background: var(--black);
  padding: 3rem 2rem;
  margin-top: 4rem;
  border-top: 2px solid var(--gold);
  text-align: center;
}

footer p {
  color: var(--gray);
}

footer a {
  color: var(--gold);
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
  }

  .hero p {
    font-size: 1.1rem;
  }

  .nav-links {
    flex-direction: column;
    gap: 1rem;
  }

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

::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--black);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--gold) 0%, var(--fire-orange) 100%);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--gold-light);
}

@keyframes glow {
  0%, 100% {
    box-shadow: 0 0 20px rgba(212, 175, 55, 0.3);
  }
  50% {
    box-shadow: 0 0 30px rgba(255, 107, 53, 0.5);
  }
}

.glow-effect {
  animation: glow 2s ease-in-out infinite;
}