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

:root {
  --white: #ffffff;
  --off-white: #f7f7f7;
  --light-gray: #e8e8e8;
  --mid-gray: #6b7280;
  --dark: #1a1a2e;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --text: #333333;
  --text-light: #555555;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text);
  background-color: var(--white);
  line-height: 1.6;
}

a {
  text-decoration: none;
  color: var(--accent);
}

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

/* NAV */
nav {
  position: fixed;
  top: 0;
  width: 100%;
  background-color: var(--white);
  border-bottom: 1px solid var(--light-gray);
  z-index: 100;
  padding: 0 2rem;
}

nav .nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
}

nav .logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--dark);
}

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

nav ul li a {
  color: var(--text-light);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

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

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
}

.hamburger span {
  width: 24px;
  height: 2px;
  background-color: var(--dark);
  transition: 0.3s;
}

/* SECTIONS */
section {
  padding: 5rem 2rem;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 0.5rem;
}

.section-subtitle {
  color: var(--mid-gray);
  margin-bottom: 3rem;
  font-size: 1rem;
}

/* HERO */
.hero {
  padding-top: 10rem;
  padding-bottom: 6rem;
  background-color: var(--white);
  text-align: center;
}

.hero-photo {
  margin-bottom: 1.5rem;
}

.hero-photo img {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  border: 4px solid var(--light-gray);
}

.hero .tag {
  display: inline-block;
  background-color: var(--off-white);
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.4rem 1rem;
  border-radius: 20px;
  margin-bottom: 1.5rem;
  border: 1px solid var(--light-gray);
}

.hero h1 {
  font-size: 3.2rem;
  font-weight: 800;
  color: var(--dark);
  margin-bottom: 1rem;
  line-height: 1.15;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto 2rem;
}

.hero-links {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.resume-btn {
    width: 100%;
    display: flex;
    justify-content: center;
    margin-top: 0.5rem;
}

.download-icon {
    margin-left: 0.35rem;
    font-size: 1rem;
}

.btn-download i {
    border: none;
}

.btn-download {
    border: 1px solid #575757;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}



.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: background-color 0.2s, color 0.2s;
}

.btn-primary {
  background-color: var(--accent);
  color: var(--white);
}

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

.btn-outline {
  background-color: var(--white);
  color: var(--text);
  border: 1px solid var(--light-gray);
}

.btn-outline:hover {
  background-color: var(--off-white);
  color: var(--text);
}

/* ABOUT */
.about {
  background-color: var(--off-white);
}

.about-content {
  max-width: 750px;
}

.about-content p {
  color: var(--text-light);
  font-size: 1.05rem;
  margin-bottom: 1rem;
}

/* EXPERIENCE */
.experience {
  background-color: var(--white);
}

.timeline {
  position: relative;
  padding-left: 2rem;
  border-left: 2px solid var(--light-gray);
}

.timeline-item {
  position: relative;
  margin-bottom: 3rem;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -2.45rem;
  top: 0.35rem;
  width: 12px;
  height: 12px;
  background-color: var(--accent);
  border-radius: 50%;
  border: 2px solid var(--white);
}

.timeline-item .date {
  font-size: 0.85rem;
  color: var(--mid-gray);
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.timeline-item h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 0.15rem;
}

.timeline-item .company {
  font-size: 0.95rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.timeline-item p {
  color: var(--text-light);
  font-size: 0.95rem;
}

.timeline-item .tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.timeline-item .tags span {
  background-color: var(--off-white);
  color: var(--mid-gray);
  font-size: 0.8rem;
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  border: 1px solid var(--light-gray);
}

/* PROJECTS */
.projects {
  background-color: var(--off-white);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.project-card {
  background-color: var(--white);
  border: 1px solid var(--light-gray);
  border-radius: 12px;
  padding: 2rem;
  transition: box-shadow 0.2s;
}

.project-card:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.project-card .project-icon {
  width: 48px;
  height: 48px;
  background-color: var(--accent);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  color: var(--white);
  font-size: 1.25rem;
  font-weight: 700;
}

.project-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 0.5rem;
}

.project-card p {
  color: var(--text-light);
  font-size: 0.95rem;
  margin-bottom: 1.25rem;
}

.project-card .project-link {
  font-weight: 600;
  font-size: 0.9rem;
}

/* CONTRIBUTIONS */
.contributions {
  background-color: var(--white);
}

.contrib-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.contrib-card {
  background-color: var(--off-white);
  border: 1px solid var(--light-gray);
  border-radius: 12px;
  padding: 1.75rem;
  transition: box-shadow 0.2s;
}

.contrib-card:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.contrib-header {
  margin-bottom: 0.75rem;
}

.contrib-lang {
  display: inline-block;
  background-color: var(--accent);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.65rem;
  border-radius: 4px;
}

.contrib-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 0.5rem;
}

.contrib-card p {
  color: var(--text-light);
  font-size: 0.9rem;
  margin-bottom: 1rem;
  line-height: 1.55;
}

/* SKILLS */
.skills {
  background-color: var(--white);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.skill-item {
  background-color: var(--off-white);
  border: 1px solid var(--light-gray);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  font-weight: 600;
  color: var(--dark);
  font-size: 0.95rem;
  transition: border-color 0.2s;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.skill-item:hover {
  border-color: var(--accent);
}

.skill-item .skill-icon {
  font-size: 2rem;
  color: var(--accent);
  flex-shrink: 0;
}

.skill-item .skill-icon-svg {
  width: 2rem;
  height: 2rem;
  color: var(--accent);
  flex-shrink: 0;
}

.skill-item .skill-context {
  font-weight: 400;
  font-size: 0.8rem;
  color: var(--mid-gray);
  margin-top: 0.35rem;
}

/* EDUCATION */
.education {
  background-color: var(--off-white);
}

.edu-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.edu-card {
  background-color: var(--white);
  border: 1px solid var(--light-gray);
  border-radius: 12px;
  padding: 2rem;
}

.edu-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 0.25rem;
}

.edu-card .degree {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}

.edu-card .year {
  font-size: 0.85rem;
  color: var(--mid-gray);
  margin-bottom: 0.75rem;
}

.edu-card p {
  color: var(--text-light);
  font-size: 0.9rem;
}

.edu-card ul {
  color: var(--text-light);
  font-size: 0.9rem;
  padding-left: 1.25rem;
  margin-top: 0.5rem;
}

.edu-card ul li {
  margin-bottom: 0.35rem;
}

/* LOOKING FOR */
.looking-for {
  background-color: var(--white);
}

.looking-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.looking-card {
  background-color: var(--off-white);
  border: 1px solid var(--light-gray);
  border-radius: 12px;
  padding: 2rem;
  transition: border-color 0.2s;
}

.looking-card:hover {
  border-color: var(--accent);
}

.looking-icon {
  color: var(--accent);
  margin-bottom: 1rem;
}

.looking-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 0.5rem;
}

.looking-card p {
  color: var(--text-light);
  font-size: 0.9rem;
  line-height: 1.55;
}

/* CONTACT */
.contact {
  background-color: var(--white);
  text-align: center;
}

.contact p {
  color: var(--text-light);
  font-size: 1.05rem;
  max-width: 500px;
  margin: 0 auto 2rem;
}

.contact-links {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* FOOTER */
footer {
  background-color: var(--dark);
  color: var(--mid-gray);
  text-align: center;
  padding: 2rem;
  font-size: 0.85rem;
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.2rem;
  }

  nav ul {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    width: 100%;
    background-color: var(--white);
    border-bottom: 1px solid var(--light-gray);
    flex-direction: column;
    padding: 1rem 2rem;
    gap: 1rem;
  }

  nav ul.active {
    display: flex;
  }

  .hamburger {
    display: flex;
  }

  section {
    padding: 3.5rem 1.25rem;
  }

  .projects-grid,
  .edu-grid {
    grid-template-columns: 1fr;
  }

  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}