/* Color Variables - Pure Grayscale */
:root {
  --color-bg: #161616;
  --color-surface: #1e1e1e;
  --color-surface-hover: #262626;
  --color-border: #333333;
  --color-text-primary: #ffffff;
  --color-text-secondary: #aaaaaa;
  --color-accent: #d4ff00;
  --color-accent-subtle: #9cb800;
  
  --font-main: 'Inter', sans-serif;
  
  --shadow-subtle: 0 8px 30px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 15px 40px rgba(212, 255, 0, 0.15);

  --glass-bg: rgba(22, 22, 22, 0.8);
  --glass-border: rgba(255, 255, 255, 0.08);
}

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

body {
  font-family: var(--font-main);
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
}

ul {
  list-style: none;
}

/* Typography */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 1rem;
}

h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

p {
  color: var(--color-text-secondary);
  font-size: 1.125rem;
  margin-bottom: 1.5rem;
  text-align: justify;
}

/* Layout Classes */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 6rem 0;
}

/* Glassmorphism Classes */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 0;
  transition: all 0.3s ease;
}

.navbar.scrolled {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -1px;
  color: var(--color-accent);
}

.logo span {
  font-size: 1.2rem;
  font-weight: 300;
  color: var(--color-text-primary);
  margin-left: 4px;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-text-primary);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width 0.3s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: 80px;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.15;
  z-index: -1;
  mask-image: linear-gradient(to bottom, black 50%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, black 50%, transparent 100%);
}

.hero-content {
  max-width: 800px;
  animation: fadeUp 1s ease-out;
}

.hero-content h1 {
  margin-bottom: 1.5rem;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  border-radius: 12px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-bg);
}

.btn-primary:hover {
  background-color: #ffffff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--color-border);
  color: var(--color-text-primary);
}

.btn-outline:hover {
  border-color: var(--color-accent);
  background-color: rgba(212, 255, 0, 0.05);
  color: var(--color-accent);
  transform: translateY(-2px);
}

/* Grid Layouts */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 4rem;
  align-items: center;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

/* Cards */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 24px;
  box-shadow: var(--shadow-subtle);
  padding: 2.5rem;
  transition: all 0.4s ease;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-10px);
  border-color: var(--color-accent-subtle);
  box-shadow: var(--shadow-hover);
  background: var(--color-surface-hover);
}

.card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 14px;
  margin-bottom: 1.5rem;
  filter: grayscale(100%) contrast(1.2);
  transition: all 0.5s ease;
}

.card:hover .card-img {
  filter: grayscale(80%) contrast(1.1);
}

.card-icon {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
  color: var(--color-accent);
}

/* Page Headers */
.page-header {
  padding-top: 150px;
  padding-bottom: 80px;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}

.page-header h1 {
  margin-bottom: 1rem;
}

/* Contact Form */
.contact-container {
  max-width: 700px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 1.5rem;
}

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

.form-control {
  width: 100%;
  padding: 1rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  color: var(--color-text-primary);
  font-family: var(--font-main);
  font-size: 1rem;
  transition: all 0.3s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(212, 255, 0, 0.15);
}

textarea.form-control {
  min-height: 150px;
  resize: vertical;
}

/* Footer */
footer {
  border-top: 1px solid var(--color-border);
  padding: 4rem 0 2rem;
  margin-top: 4rem;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.footer-bottom {
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

/* Animations */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
  .grid-2, .grid-3 {
    grid-template-columns: 1fr;
  }
  
  .nav-links {
    display: none;
  }
}