:root {
  --bg-color: #0F172A;
  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --accent-color: #38BDF8;
  --accent-glow: rgba(56, 189, 248, 0.3);
  --card-bg: #1E293B;
  --nav-bg: rgba(15, 23, 42, 0.85);
  --font-main: 'Inter', sans-serif;
  --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-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

h1 {
  font-size: 3.5rem;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-color) 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 1rem;
}

h2 {
  font-size: 2.5rem;
  margin-bottom: 2rem;
  text-align: center;
  position: relative;
  display: inline-block;
}

h2::after {
  content: '';
  display: block;
  width: 50%;
  height: 4px;
  background: var(--accent-color);
  margin: 0.5rem auto 0;
  border-radius: 2px;
}

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

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

/* Navigation */
nav {
  position: fixed;
  top: 0;
  width: 100%;
  padding: 1rem 5%;
  background: var(--nav-bg);
  backdrop-filter: blur(10px);
  z-index: 1000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -1px;
}

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

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  opacity: 0.8;
}

.nav-links a:hover {
  opacity: 1;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 0 1rem;
  position: relative;
  overflow: hidden;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2rem;
}

.cta-button {
  display: inline-block;
  padding: 1rem 2rem;
  background: var(--accent-color);
  color: var(--bg-color);
  font-weight: 600;
  border-radius: 50px;
  box-shadow: 0 0 20px var(--accent-glow);
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px var(--accent-glow);
}

/* Background Animation Elements */
.bg-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  z-index: -1;
  animation: float 20s infinite alternate;
}

.blob-1 {
  width: 400px;
  height: 400px;
  background: var(--accent-color);
  top: -100px;
  left: -100px;
}

.blob-2 {
  width: 300px;
  height: 300px;
  background: #6366f1;
  bottom: -50px;
  right: -50px;
  animation-delay: -10s;
}

@keyframes float {
  0% {
    transform: translate(0, 0);
  }

  100% {
    transform: translate(50px, 50px);
  }
}

/* Sections */
section {
  padding: 6rem 5%;
  max-width: 1200px;
  margin: 0 auto;
}

/* Education */
/* Education & Bio */
.education-card,
.bio-card {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  margin-top: 2rem;
}

.edu-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.edu-title {
  font-size: 1.2rem;
  font-weight: 600;
}

.edu-date {
  color: var(--accent-color);
  font-weight: 500;
}

/* Skills */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.skill-category h3 {
  font-size: 1.2rem;
  margin-bottom: 1rem;
  color: var(--text-secondary);
  border-left: 3px solid var(--accent-color);
  padding-left: 1rem;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.skill-tag {
  background: rgba(255, 255, 255, 0.05);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-size: 0.9rem;
  transition: background var(--transition-speed);
}

.skill-tag:hover {
  background: rgba(56, 189, 248, 0.15);
  color: var(--accent-color);
}

/* Projects */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.project-card,
.achievement-card {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: transform var(--transition-speed), border-color var(--transition-speed);
  position: relative;
  overflow: hidden;
}

.project-card:hover,
.achievement-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent-color);
}

.project-title {
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.project-tech {
  color: var(--accent-color);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.project-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

.project-links {
  display: flex;
  gap: 1rem;
  margin-top: auto;
  /* Push to bottom if card height varies */
}

.project-link {
  font-size: 0.9rem;
  color: var(--accent-color);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.project-link:hover {
  text-decoration: underline;
}

/* Contact */
.contact-container {
  max-width: 600px;
  margin: 2rem auto 0;
  text-align: center;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-bottom: 2rem;
  background: var(--card-bg);
  padding: 2.5rem;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.form-group {
  display: flex;
  flex-direction: column;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 1rem;
  transition: border-color var(--transition-speed), background var(--transition-speed);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent-color);
  background: rgba(255, 255, 255, 0.05);
}

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

.social-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 2rem;
}

.social-btn {
  padding: 1rem 2rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  font-weight: 500;
  transition: all var(--transition-speed);
}

.social-btn:hover {
  background: var(--text-primary);
  color: var(--bg-color);
}

/* Animations using Intersection Observer */
.hidden {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.show {
  opacity: 1;
  transform: translateY(0);
}

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

  h2 {
    font-size: 2rem;
  }

  .nav-links {
    display: none;
  }

  /* Mobile menu simplified for now */
}