:root {
  --bg-color: #0d1117;
  --bg-surface: #161b22;
  --bg-surface-hover: #21262d;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --accent-cyan: #06b6d4;
  --accent-blue: #3b82f6;
  --accent-purple: #8b5cf6;
  --border-color: #30363d;
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'Space Mono', 'Fira Code', monospace;
  --glass-bg: rgba(22, 27, 34, 0.7);
  --glass-border: rgba(48, 54, 61, 0.5);
}

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

html {
  scroll-behavior: smooth;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.2;
}

.mono {
  font-family: var(--font-mono);
}

.text-gradient {
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Navigation - Glassmorphism */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
  z-index: 1000;
  padding: 1rem 2rem;
  transition: all 0.3s ease;
}

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

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  text-decoration: none;
  font-family: var(--font-mono);
  letter-spacing: -0.5px;
}

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

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease, text-shadow 0.2s ease;
}

.nav-links a:hover {
  color: var(--accent-cyan);
  text-shadow: 0 0 8px rgba(6, 182, 212, 0.4);
}

/* Sections */
section {
  padding: 6rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 3rem;
  font-family: var(--font-mono);
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-blue));
  margin: 0.5rem auto 0;
  border-radius: 2px;
}

/* Header/Hero */
.hero {
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at center, rgba(6, 182, 212, 0.1) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

.hero h2 {
  font-size: 4rem;
  margin-bottom: 1rem;
  letter-spacing: -1px;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 2rem;
}

/* About Section */
.about-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 2rem;
}

.profile-img-container {
  position: relative;
  display: inline-block;
  border-radius: 50%;
  padding: 4px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  box-shadow: 0 0 20px rgba(6, 182, 212, 0.3);
}

.profile-img {
  width: 240px;
  height: 240px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--bg-color);
  background-color: var(--bg-surface);
}

.about-text {
  max-width: 800px;
  font-size: 1.1rem;
  color: var(--text-secondary);
}

/* Skills Section */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.skill-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: all 0.3s ease;
  cursor: default;
}

.skill-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent-cyan);
  box-shadow: 0 5px 15px rgba(6, 182, 212, 0.15);
  background: var(--bg-surface-hover);
}

.skill-card i, .skill-card img {
  font-size: 1.5rem;
  width: 1.5rem;
  text-align: center;
}

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

.project-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.5rem;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  border-color: rgba(6, 182, 212, 0.3);
}

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

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.project-title {
  font-size: 1.25rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.project-links a {
  color: var(--text-secondary);
  font-size: 1.25rem;
  transition: color 0.2s;
}

.project-links a:hover {
  color: var(--text-primary);
}

.project-list {
  list-style: none;
  flex-grow: 1;
}

.project-list li {
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
  font-size: 0.95rem;
  position: relative;
  padding-left: 1.5rem;
}

.project-list li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent-cyan);
}

/* Resume & Contact Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--accent-cyan);
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s ease;
}

.btn:hover {
  background: rgba(6, 182, 212, 0.1);
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.3);
}

.btn-primary {
  background: var(--accent-cyan);
  color: #000;
  border-color: var(--accent-cyan);
  font-weight: 600;
}

.btn-primary:hover {
  background: transparent;
  color: var(--accent-cyan);
}

/* Contact Form */
.contact-container {
  max-width: 600px;
  margin: 0 auto;
}

.contact-wrapper {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
}

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

.input-container {
  display: flex;
  align-items: flex-start;
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 0.75rem;
  transition: border-color 0.3s;
}

.input-container:focus-within {
  border-color: var(--accent-cyan);
}

.input-container i {
  color: var(--text-secondary);
  margin-right: 1rem;
  margin-top: 0.25rem;
}

.form-control {
  background: transparent;
  border: none;
  width: 100%;
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: 1rem;
  outline: none;
}

textarea.form-control {
  min-height: 120px;
  resize: vertical;
}

.contact-info {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 3rem;
  flex-wrap: wrap;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-secondary);
}

.contact-item a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color 0.2s;
}

.contact-item a:hover {
  color: var(--accent-cyan);
}

.contact-item i {
  color: var(--accent-cyan);
  font-size: 1.25rem;
}

/* Footer */
footer {
  text-align: center;
  padding: 2rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none; /* simple mobile view */
  }
  
  .hero h2 {
    font-size: 2.5rem;
  }
  
  .contact-info {
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }
}