@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@300;400;600&family=Space+Grotesk:wght@400;700&display=swap');

:root {
  --bg-base: #0a0a0c;
  --bg-surface: rgba(255, 255, 255, 0.03);
  --bg-surface-hover: rgba(255, 255, 255, 0.06);
  --border-color: rgba(255, 255, 255, 0.08);
  --text-main: #f4f4f5;
  --text-muted: #a1a1aa;
  --accent-primary: #00f0ff;
  --accent-secondary: #ff003c;
  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'Manrope', sans-serif;
  --transition-fast: 0.2s ease;
  --transition-slow: 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

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

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

/* Background Effects */
body::before {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 50% 50%, rgba(0, 240, 255, 0.03), transparent 60%),
              radial-gradient(circle at 80% 20%, rgba(255, 0, 60, 0.04), transparent 50%);
  z-index: -1;
  pointer-events: none;
}

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

/* Nav */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  padding: 1.5rem 3rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

.nav-brand {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

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

.nav-links a {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  position: relative;
}

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

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

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

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 0 5%;
  position: relative;
}

.hero-content {
  max-width: 800px;
  animation: fadeUp 1s var(--transition-slow) forwards;
  opacity: 0;
  transform: translateY(30px);
}

.hero-subtitle {
  color: var(--accent-primary);
  font-family: var(--font-heading);
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: 1rem;
  display: block;
}

.hero-title {
  font-size: clamp(3rem, 8vw, 6rem);
  margin-bottom: 1.5rem;
  background: linear-gradient(to right, #fff, #a1a1aa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
  max-width: 600px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2rem;
  font-family: var(--font-heading);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-main);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--text-main);
  transition: transform var(--transition-fast);
  z-index: -1;
}

.btn:hover::before {
  transform: translateX(100%);
}

.btn:hover {
  color: var(--bg-base);
  border-color: var(--text-main);
}

.btn-primary {
  background: var(--text-main);
  color: var(--bg-base);
}

.btn-primary:hover {
  background: transparent;
  color: var(--text-main);
}

.btn-primary::before {
  background: var(--bg-base);
}

/* Sections */
.section {
  padding: 8rem 5%;
}

.section-header {
  margin-bottom: 4rem;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
}

.section-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  color: var(--text-main);
  position: relative;
  padding-bottom: 1rem;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 4px;
  background: var(--accent-secondary);
}

/* Skills Cards */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.skill-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 3rem 2rem;
  transition: transform var(--transition-slow), background var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.skill-card:hover {
  transform: translateY(-10px);
  background: var(--bg-surface-hover);
  border-color: rgba(255, 255, 255, 0.2);
}

.skill-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}

.skill-card:hover::before {
  transform: scaleX(1);
}

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

.skill-title {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

/* Portfolio Grid */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2rem;
}

.portfolio-item {
  position: relative;
  border: 1px solid var(--border-color);
  overflow: hidden;
  aspect-ratio: 4/3;
  group: hover;
}

.portfolio-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: all var(--transition-slow);
}

.portfolio-item:hover .portfolio-img {
  transform: scale(1.05);
  filter: brightness(0.5);
}

.portfolio-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10, 10, 12, 0.95) 0%, rgba(10, 10, 12, 0.6) 50%, transparent 100%);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--transition-slow);
}

.portfolio-item:hover .portfolio-overlay {
  opacity: 1;
  transform: translateY(0);
}

.portfolio-title {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.portfolio-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

/* Pixel Art Layout */
.pixel-art-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
  gap: 3rem;
}

.pixel-art-item {
  position: relative;
  border: 1px solid var(--border-color);
  overflow: hidden;
  border-radius: 4px;
}

.pixel-art-img {
  width: 100%;
  height: auto;
  display: block;
  transition: all var(--transition-slow);
}

.pixel-art-item:hover .pixel-art-img {
  transform: scale(1.05);
  filter: brightness(0.5);
}

.pixel-art-item:hover .portfolio-overlay {
  opacity: 1;
  transform: translateY(0);
}

/* Footer */
.footer {
  border-top: 1px solid var(--border-color);
  padding: 4rem 5%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 2rem;
}

.social-links {
  display: flex;
  gap: 1.5rem;
}

.social-links a {
  color: var(--text-muted);
  font-size: 1.25rem;
}

.social-links a:hover {
  color: var(--accent-primary);
  transform: translateY(-3px);
}

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

/* Responsive */
@media (max-width: 768px) {
  .navbar {
    padding: 1rem 5%;
  }
  .nav-links {
    display: none; /* In a real app, implement a hamburger menu */
  }
  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
}