/* =========================
   GLOBAL RESET & BASE
========================= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, sans-serif;
  line-height: 1.6;
  color: #1f2937;
  background-color: #ffffff;
}

/* =========================
   GENERAL LAYOUT
========================= */
section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

h1,
h2,
h3 {
  color: #0f172a;
  line-height: 1.3;
}

h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

p {
  margin-bottom: 1rem;
  color: #374151;
}

ul {
  list-style: none;
}

a {
  color: #2563eb;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* =========================
   HEADER & NAVIGATION
========================= */
header {
  background-color: #f8fafc;
  border-bottom: 1px solid #e5e7eb;
}

nav {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

nav h1 {
  font-size: 1.4rem;
  font-weight: 700;
}

nav ul {
  display: flex;
  gap: 1.25rem;
}

nav ul li a {
  font-size: 0.95rem;
  color: #374151;
}

nav ul li a:hover,
nav ul li a.active {
  color: #2563eb;
  font-weight: 600;
}

/* =========================
   HERO SECTION
========================= */
.hero {
  max-width: 1100px;
  margin: 0 auto;
  padding: 4rem 1.5rem 5rem;
}

.hero h2 {
  font-size: 2.4rem;
  max-width: 720px;
}

.hero p {
  font-size: 1.1rem;
  max-width: 650px;
  margin-top: 1rem;
}

.hero-buttons {
  margin-top: 2rem;
  display: flex;
  gap: 1rem;
}

.hero-buttons a {
  padding: 0.7rem 1.5rem;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 500;
}

.hero-buttons a:first-child {
  background-color: #2563eb;
  color: #ffffff;
}

.hero-buttons a:last-child {
  border: 1px solid #2563eb;
  color: #2563eb;
}

/* =========================
   SKILLS SECTION
========================= */
#skills article {
  margin-bottom: 2rem;
}

#skills ul li {
  margin-bottom: 0.4rem;
  color: #475569;
}

/* =========================
   PROJECTS SECTION
========================= */
#projects article {
  border: 1px solid #e5e7eb;
  padding: 1.5rem;
  border-radius: 8px;
  margin-bottom: 1.5rem;
  background-color: #ffffff;
}

#projects p {
  margin-bottom: 0.6rem;
}

#projects a {
  font-weight: 500;
}

/* =========================
   ANALYTICS SECTION
========================= */
#analytics ul li {
  margin-bottom: 0.5rem;
  color: #475569;
}

/* =========================
   EXPERIENCE SECTION
========================= */
#experience article {
  border-left: 3px solid #2563eb;
  padding-left: 1rem;
}

/* =========================
   CONTACT SECTION
========================= */
#contact p {
  margin-bottom: 0.6rem;
}

/* =========================
   FOOTER
========================= */
footer {
  text-align: center;
  padding: 2rem 1rem;
  background-color: #f8fafc;
  border-top: 1px solid #e5e7eb;
  color: #64748b;
  font-size: 0.9rem;
}

/* =========================
   RESPONSIVE DESIGN
========================= */
@media (max-width: 768px) {
  nav {
    flex-direction: column;
    gap: 1rem;
  }

  nav ul {
    flex-wrap: wrap;
    justify-content: center;
  }

  .hero h2 {
    font-size: 2rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: flex-start;
  }
}