:root {
  --bg-warm: #fff9f1;
  --text-main: #334155;
}

html {
  scroll-behavior: smooth;
}

body {
  background:
    radial-gradient(circle at 10% 10%, rgba(221, 243, 230, 0.55), transparent 28%),
    radial-gradient(circle at 90% 15%, rgba(221, 238, 255, 0.48), transparent 26%),
    radial-gradient(circle at 85% 85%, rgba(255, 229, 217, 0.45), transparent 26%),
    var(--bg-warm);
  color: var(--text-main);
}

.section-title {
  margin-bottom: 1rem;
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.nav-link {
  position: relative;
  color: #475569;
  transition: color 0.2s ease;
}

.nav-link:hover {
  color: #0f172a;
}

.nav-link.active-link {
  color: #0f172a;
}

.nav-link.active-link::after {
  position: absolute;
  bottom: -0.5rem;
  left: 0;
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: #0f172a;
  content: "";
}

.filter-btn {
  border: 1px solid #cbd5e1;
  border-radius: 999px;
  padding: 0.4rem 0.85rem;
  font-size: 0.78rem;
  font-weight: 700;
  color: #475569;
  transition: all 0.2s ease;
}

.filter-btn:hover {
  border-color: #94a3b8;
  color: #1e293b;
}

.active-filter {
  border-color: transparent;
  background: #334155;
  color: #ffffff;
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

.project-card {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.project-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.12);
}

.project-card.is-hidden {
  display: none;
}