:root {
  --bg: #f4f6fa;
  --text: #1b1f25;
  --accent: #4169e1;
  --card-bg: #fff;
  --shadow: rgba(0, 0, 0, 0.1);
  --glow: rgba(65, 105, 225, 0.25);
}

body {
  font-family: "Inter", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0;
  line-height: 1.6;
  text-align: center;
  overflow-x: hidden;
}

/* Header */
header {
  background: linear-gradient(135deg, #4169e1, #5f91ff);
  color: white;
  padding: 3rem 1rem 2rem;
  box-shadow: 0 4px 8px var(--shadow);
}
header h1 {
  font-size: 2.5rem;
  margin-bottom: 0.4rem;
}
header p {
  font-weight: 500;
  opacity: 0.9;
}

/* Intro */
main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}
.intro {
  margin-bottom: 3rem;
  font-size: 1.05rem;
  color: #333;
}
.intro strong {
  color: var(--accent);
}

/* Section title */
.section-title {
  font-size: 1.6rem;
  margin-bottom: 1.5rem;
  color: var(--accent);
  position: relative;
}
.section-title::after {
  content: "";
  display: block;
  width: 80px;
  height: 3px;
  background: var(--accent);
  margin: 0.5rem auto 0;
  border-radius: 2px;
}

/* Projects */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
  gap: 1.5rem;
  justify-items: center;
}
.project {
  background: var(--card-bg);
  border-radius: 15px;
  padding: 1.8rem;
  box-shadow: 0 4px 10px var(--shadow);
  max-width: 330px;
  text-align: left;
  transition: all 0.3s ease;
  position: relative;
}
.project::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 15px;
  background: linear-gradient(145deg, transparent 40%, var(--glow));
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}
.project:hover::before {
  opacity: 1;
}
.project:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 16px var(--glow);
}
.project h3 {
  color: var(--accent);
  margin-top: 0;
}
.project a {
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
  display: inline-block;
  margin-top: 0.6rem;
}
.project a:hover {
  text-decoration: underline;
}

/* Animation */
.fade-in {
  opacity: 0;
  animation: fadeIn 1s forwards;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(15px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Footer */
footer {
  background: #f0f2f7;
  padding: 2rem 1rem;
  font-size: 0.9rem;
  color: #555;
  margin-top: 3rem;
  box-shadow: 0 -2px 10px var(--shadow);
}
footer a {
  color: var(--accent);
  text-decoration: none;
}
footer a:hover {
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 700px) {
  header h1 { font-size: 2rem; }
  .project { max-width: 100%; }
}