:root {
  /* Color Palette - Modern & Premium */
  --bg-color: #0d1117;
  --text-color: #e6edf3;
  --accent-color: #58a6ff;
  --secondary-bg: #161b22;
  --card-bg: #21262d;
  --border-color: #30363d;
  --muted-text: #8b949e;

  /* Fonts */
  --font-main: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;

  /* Transitions */
  --transition-speed: 0.3s;
}

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

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

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

ul {
  list-style: none;
}

/* Helper Classes */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 100px 0;
}

h1,
h2,
h3 {
  font-weight: 700;
  line-height: 1.2;
}

h2 {
  font-size: 2.5rem;
  margin-bottom: 50px;
  text-align: center;
  position: relative;
}

h2::after {
  content: "";
  display: block;
  width: 60px;
  height: 4px;
  background-color: var(--accent-color);
  margin: 10px auto 0;
  border-radius: 2px;
}

.btn {
  display: inline-block;
  padding: 12px 24px;
  background-color: var(--accent-color);
  color: #fff;
  border-radius: 6px;
  font-weight: 600;
  transition: transform 0.2s, filter 0.2s;
}

.btn:hover {
  transform: translateY(-2px);
  filter: brightness(1.1);
}

/* Navigation */
nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(13, 17, 23, 0.9);
  backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-color);
}

.nav-links {
  display: flex;
  gap: 30px;
}

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

/* Hero Section */
.hero {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: radial-gradient(
    circle at center,
    #1b2430 0%,
    var(--bg-color) 70%
  );
}

.hero-content h1 {
  font-size: 4rem;
  margin-bottom: 20px;
  background: linear-gradient(120deg, #fff, var(--muted-text));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-content p {
  font-size: 1.5rem;
  color: var(--muted-text);
  margin-bottom: 40px;
}

/* About Section */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}

.about-text p {
  margin-bottom: 20px;
  font-size: 1.1rem;
}

.about-img {
  width: 100%;
  height: 400px;
  border-radius: 12px;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.about-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Experience Section */
.timeline {
  max-width: 800px;
  margin: 0 auto;
}

.experience-item {
  background-color: var(--card-bg);
  padding: 30px;
  border-radius: 12px;
  margin-bottom: 30px;
  border: 1px solid var(--border-color);
  transition: transform var(--transition-speed);
}

.experience-item:hover {
  transform: translateY(-5px);
  border-color: var(--accent-color);
}

.role-title {
  font-size: 1.25rem;
  color: var(--text-color);
}

.company {
  color: var(--accent-color);
  font-weight: 600;
  margin-bottom: 10px;
  display: block;
}

.date {
  color: var(--muted-text);
  font-size: 0.9rem;
  margin-bottom: 15px;
  display: block;
}

/* Skills Section */
.skills-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 15px;
}

.skill-tag {
  background-color: var(--secondary-bg);
  border: 1px solid var(--border-color);
  padding: 10px 20px;
  border-radius: 50px;
  font-size: 1rem;
  transition: all var(--transition-speed);
}

.skill-tag:hover {
  background-color: var(--accent-color);
  color: white;
  border-color: var(--accent-color);
}

/* Projects Section */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.project-card {
  background-color: var(--card-bg);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: transform var(--transition-speed);
}

.project-card:hover {
  transform: translateY(-10px);
}

.project-img {
  height: 200px;
  background-color: var(--secondary-bg);
  /* Placeholder */
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted-text);
}

.project-info {
  padding: 25px;
}

.project-title {
  font-size: 1.5rem;
  margin-bottom: 10px;
}

.project-desc {
  color: var(--muted-text);
  margin-bottom: 20px;
}

/* Contact Section */
.contact-container {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.contact-text {
  font-size: 1.2rem;
  margin-bottom: 40px;
  color: var(--muted-text);
}

footer {
  text-align: center;
  padding: 40px 0;
  color: var(--muted-text);
  border-top: 1px solid var(--border-color);
  margin-top: 50px;
}

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

  .about-content {
    grid-template-columns: 1fr;
  }

  .nav-links {
    display: none; /* simple hide for mobile for MVP, can add hamburger later */
  }
}