/* ===== CSS Variables ===== */
:root {
  --bg-primary: hsl(220, 20%, 7%);
  --bg-secondary: hsl(220, 18%, 10%);
  --bg-card: hsl(220, 16%, 15%);
  --bg-muted: hsl(220, 14%, 18%);
  
  --text-primary: hsl(210, 20%, 95%);
  --text-secondary: hsl(215, 15%, 55%);
  --text-muted: hsl(215, 15%, 45%);
  
  --accent: hsl(160, 84%, 39%);
  --accent-hover: hsl(160, 84%, 45%);
  --accent-glow: hsla(160, 84%, 39%, 0.3);
  
  --border: hsl(220, 14%, 18%);
  
  --gradient-primary: linear-gradient(135deg, hsl(160, 84%, 39%) 0%, hsl(180, 70%, 35%) 100%);
  --gradient-text: linear-gradient(90deg, hsl(160, 84%, 50%) 0%, hsl(180, 70%, 50%) 100%);
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  --radius: 0.75rem;
  --transition: 0.3s ease;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

/* ===== Utilities ===== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.text-primary {
  color: var(--accent);
}

.text-white {
  color: var(--text-primary);
  font-weight: 500;
}

.text-gradient {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.center {
  text-align: center;
}

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

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

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 20px var(--accent-glow); }
  50% { box-shadow: 0 0 40px var(--accent-glow); }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  border: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--bg-primary);
  box-shadow: 0 0 30px var(--accent-glow);
}

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
}

.btn-outline:hover {
  background: hsla(160, 84%, 39%, 0.1);
}

.btn-lg {
  padding: 1.25rem 2.5rem;
  font-size: 1.1rem;
}

/* ===== Navbar ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 0;
  transition: all var(--transition);
}

.navbar.scrolled {
  background: hsla(220, 20%, 7%, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.navbar-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}

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

.nav-number {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  margin-right: 0.25rem;
}

.nav-btn {
  padding: 0.5rem 1rem;
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: 0.375rem;
  font-size: 0.9rem;
  transition: all var(--transition);
}

.nav-btn:hover {
  background: hsla(160, 84%, 39%, 0.1);
}

/* Mobile Menu */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.hamburger {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  position: relative;
  transition: all var(--transition);
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition);
}

.hamburger::before { top: -8px; }
.hamburger::after { bottom: -8px; }

.mobile-menu-btn.active .hamburger {
  background: transparent;
}

.mobile-menu-btn.active .hamburger::before {
  transform: rotate(45deg);
  top: 0;
}

.mobile-menu-btn.active .hamburger::after {
  transform: rotate(-45deg);
  bottom: 0;
}

@media (max-width: 768px) {
  .mobile-menu-btn {
    display: block;
  }
  
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    max-width: 300px;
    height: 100vh;
    background: var(--bg-secondary);
    flex-direction: column;
    justify-content: center;
    gap: 2rem;
    transition: right var(--transition);
    border-left: 1px solid var(--border);
  }
  
  .nav-menu.active {
    right: 0;
  }
}

/* ===== Hero Section ===== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 6rem 1.5rem 4rem;
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
}

.hero-glow-1 {
  width: 400px;
  height: 400px;
  top: 25%;
  left: 25%;
  background: hsla(160, 84%, 39%, 0.08);
}

.hero-glow-2 {
  width: 350px;
  height: 350px;
  bottom: 25%;
  right: 25%;
  background: hsla(180, 70%, 35%, 0.08);
}

.hero-content {
  max-width: 900px;
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero-greeting {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 1rem;
  margin-bottom: 1rem;
}

.hero-name {
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  line-height: 1.1;
}

.hero-title {
  font-size: clamp(2rem, 6vw, 3.5rem);
  font-weight: 700;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3rem;
}

.hero-social {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
}

.hero-social a {
  color: var(--text-secondary);
  transition: color var(--transition), transform var(--transition);
}

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

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-secondary);
  animation: float 3s ease-in-out infinite;
  transition: color var(--transition);
}

.scroll-indicator:hover {
  color: var(--accent);
}

/* ===== Sections ===== */
.section {
  padding: 5rem 0;
}

.section-header {
  margin-bottom: 3rem;
}

.section-number {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--text-primary);
}

/* ===== About Section ===== */
.about-grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 3rem;
  align-items: start;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.7;
}

.about-tech {
  margin-top: 1.5rem;
}

.about-tech-title {
  color: var(--text-primary);
  font-weight: 500;
  margin-bottom: 1rem;
}

.tech-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
}

.tech-list li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.arrow {
  color: var(--accent);
}

.about-image {
  position: relative;
}

.image-wrapper {
  position: relative;
}

.image-placeholder {
  aspect-ratio: 1;
  background: var(--bg-muted);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
  overflow: hidden;
}

.image-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-primary);
  opacity: 0.1;
}

.avatar-circle {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.avatar-circle span {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--bg-primary);
}

.image-placeholder p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.image-border {
  position: absolute;
  inset: 0;
  border: 2px solid var(--accent);
  border-radius: var(--radius);
  transform: translate(16px, 16px);
  z-index: 0;
  transition: transform var(--transition);
}

.image-wrapper:hover .image-border {
  transform: translate(8px, 8px);
}

@media (max-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr;
  }
  
  .about-image {
    order: -1;
    max-width: 280px;
    margin: 0 auto;
  }
}

/* ===== Tech Section ===== */
.tech-section {
  background: var(--bg-secondary);
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.tech-card {
  background: hsla(220, 16%, 15%, 0.5);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color var(--transition);
}

.tech-card:hover {
  border-color: hsla(160, 84%, 39%, 0.5);
}

.tech-card-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: center;
  margin-bottom: 1.5rem;
}

.tech-items {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

.tech-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  background: hsla(220, 14%, 18%, 0.5);
  border-radius: 0.5rem;
  transition: background var(--transition);
}

.tech-item:hover {
  background: var(--bg-muted);
}

.tech-icon {
  font-size: 1.5rem;
}

.tech-img {
  width: 36px;
}

.tech-item span:last-child {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
}

/* ===== Contact Section ===== */
.contact-section {
  background: var(--bg-secondary);
}

.contact-content {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.contact-description {
  color: var(--text-secondary);
  font-size: 1.125rem;
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

.contact-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.contact-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 1.5rem;
  background: hsla(220, 16%, 15%, 0.5);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
}

.contact-card:hover {
  border-color: hsla(160, 84%, 39%, 0.5);
}

.contact-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: hsla(160, 84%, 39%, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  transition: background var(--transition);
}

.contact-card:hover .contact-icon {
  background: hsla(160, 84%, 39%, 0.2);
}

.contact-label {
  font-weight: 500;
  color: var(--text-primary);
}

.contact-value {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

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

.footer-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer-credit {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.footer-social {
  display: flex;
  gap: 1rem;
}

.footer-social a {
  color: var(--text-secondary);
  transition: color var(--transition);
}

.footer-social a:hover {
  color: var(--accent);
}

.footer-copy {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

@media (max-width: 768px) {
  .footer-container {
    flex-direction: column;
    text-align: center;
  }
}