/* Base variables for colours and fonts */
:root {
  --bg-dark: #0a192f;
  --bg-light: #f5f5f5;
  --accent: #00bfa6;
  --text-light: #cbd5e1;
  --text-dark: #0a192f;
  --card-bg-dark: #112240;
  --font-primary: 'Montserrat', sans-serif;
  --font-mono: 'Roboto Mono', monospace;
}

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

body {
  font-family: var(--font-primary);
  line-height: 1.6;
  background-color: var(--bg-dark);
  color: var(--text-light);
  scroll-behavior: smooth;
}

h1,
h2,
h3,
h4,
h5 {
  font-family: var(--font-primary);
  margin-bottom: 0.5rem;
  color: inherit;
}

p {
  margin-bottom: 1rem;
  font-family: var(--font-mono);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease-in-out;
}

a:hover {
  color: #38fbd7;
}

/* Container for consistent horizontal padding */
.container {
  width: 90%;
  max-width: 1100px;
  margin: 0 auto;
}

/* Hero section */
.hero {
  position: relative;
  height: 100vh;
  background-image: url('hero-bg.png');
  background-size: cover;
  background-position: center;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  color: #fff;
}

.hero .overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.65);
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  padding: 1rem;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.hero h2 {
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--accent);
  min-height: 1.5em;
}

.tagline {
  font-size: 1rem;
  max-width: 700px;
  margin: 1rem auto;
}

.social-links {
  margin-top: 1.5rem;
  display: flex;
  justify-content: center;
  gap: 1.5rem;
}

.social-links a {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  text-align: center;
  color: var(--accent);
  transition: all 0.3s ease;
}

.social-links a:hover .social-icon {
  background: var(--accent);
  color: var(--bg-dark);
  transform: translateY(-3px);
}

.social-links a:hover .social-label {
  opacity: 1;
}

.social-links .social-icon {
  font-size: 1.5rem;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--accent);
  border-radius: 50%;
  transition: all 0.3s ease;
}

.social-links .social-label {
  display: block;
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  opacity: 0.7;
  transition: opacity 0.3s ease;
}

/* SVG icon sizing within social links */
.social-links svg.icon {
  display: block;
  width: 1.2rem;
  height: 1.2rem;
}

/* Call to action button */
.cta {
  margin-top: 1.5rem;
}

.btn {
  display: inline-block;
  background-color: var(--accent);
  color: var(--bg-dark);
  padding: 0.8rem 1.6rem;
  border-radius: 4px;
  font-weight: 600;
  letter-spacing: 0.5px;
  transition: background-color 0.3s ease, transform 0.3s ease;
}

.btn:hover {
  background-color: #38fbd7;
  transform: translateY(-3px);
}

/* Section styles */
.section {
  padding: 4rem 0;
}

.section.light {
  background-color: var(--bg-light);
  color: var(--text-dark);
}

.section.dark {
  background-color: var(--bg-dark);
  color: var(--text-light);
}

.section h3 {
  font-size: 2rem;
  margin-bottom: 2rem;
  font-weight: 600;
}

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

.skill-card {
  background-color: var(--card-bg-dark);
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease;
}

.skill-card:hover {
  transform: translateY(-5px);
}

.skill-card h4 {
  color: var(--accent);
  margin-bottom: 0.75rem;
  font-weight: 600;
}

.skill-card ul {
  list-style: none;
  padding-left: 0;
}

.skill-card li {
  margin-bottom: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: 2rem;
  margin-left: 1rem;
  border-left: 2px solid var(--accent);
}

.timeline-item {
  position: relative;
  margin-bottom: 2.5rem;
  padding-left: 1.5rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -1.05rem;
  top: 0.2rem;
  width: 0.8rem;
  height: 0.8rem;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-light);
}

.timeline-date {
  display: block;
  font-size: 0.9rem;
  font-family: var(--font-mono);
  color: var(--accent);
  margin-bottom: 0.25rem;
}

.timeline-content h4 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.timeline-content .location {
  font-size: 0.85rem;
  font-style: italic;
  margin-bottom: 0.5rem;
  color: var(--text-light);
}

.timeline-content ul {
  margin-left: 1rem;
  list-style: disc;
}

.timeline-content li {
  margin-bottom: 0.4rem;
  font-size: 0.9rem;
  font-family: var(--font-mono);
}

/* Education & Certifications */
.education-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.education-item {
  background-color: var(--card-bg-dark);
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.education-item h4 {
  color: var(--accent);
  margin-bottom: 0.5rem;
  font-size: 1.2rem;
}

.education-item .institution {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.education-item .details {
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.cert-title {
  margin-top: 1rem;
  margin-bottom: 0.5rem;
  font-size: 1.3rem;
  color: var(--accent);
}

.cert-list {
  columns: 2;
  column-gap: 2rem;
  list-style: disc;
  padding-left: 1.5rem;
  font-family: var(--font-mono);
}

.cert-list li {
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

/* Projects & community */
.projects-list {
  list-style: disc;
  padding-left: 1.5rem;
  font-family: var(--font-mono);
}

.projects-list li {
  margin-bottom: 0.8rem;
  font-size: 0.9rem;
}

/* Footer */
.footer {
  background-color: var(--bg-dark);
  color: var(--text-light);
  text-align: center;
  padding: 1rem 0;
  font-size: 0.9rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Responsive typography */
@media (min-width: 768px) {
  .hero h1 {
    font-size: 4rem;
  }
  .hero h2 {
    font-size: 1.75rem;
  }
  .tagline {
    font-size: 1.1rem;
  }
}