:root {
  --card: rgba(255, 255, 255, 0.74);
  --card-strong: rgba(255, 255, 255, 0.9);
  --card-border: rgba(91, 115, 160, 0.16);
  --text: #0f1b33;
  --text-soft: rgba(15, 27, 51, 0.72);
  --accent: #3c63ff;
  --accent-soft: rgba(60, 99, 255, 0.1);
  --max-width: 1080px;
  --radius: 24px;
  --shadow: 0 22px 50px rgba(75, 101, 145, 0.12);
  --font-sans: "Manrope", sans-serif;
  --font-display: "Inter", sans-serif;
  --font-korean: "Gowun Batang", serif;
  --font-mono:
    "SFMono-Regular", "SF Mono", "Cascadia Code", "JetBrains Mono", Consolas,
    "Liberation Mono", Menlo, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--text);
  line-height: 1.6;
  background:
    radial-gradient(circle at top, rgba(60, 99, 255, 0.12), transparent 26%),
    radial-gradient(
      circle at 85% 20%,
      rgba(13, 148, 136, 0.08),
      transparent 20%
    ),
    linear-gradient(180deg, #f9fbff 0%, #eef4ff 58%, #e8f0ff 100%);
}

.font-sans {
  font-family: var(--font-sans);
}

.font-display {
  font-family: var(--font-display);
}

.font-korean {
  font-family: var(--font-korean);
}

.font-mono {
  font-family: var(--font-mono);
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(var(--max-width), calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(247, 250, 255, 0.76);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(91, 115, 160, 0.08);
}

.header-inner {
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 0.98rem;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.hero {
  padding: 92px 0 54px;
}

.hero-inner {
  max-width: 760px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.9rem, 6vw, 4.9rem);
  line-height: 1.04;
  letter-spacing: -0.05em;
}

.hero-text {
  margin: 22px 0 0;
  max-width: 640px;
  color: var(--text-soft);
  font-size: 1.08rem;
}

.focus,
.portfolio {
  padding: 24px 0 52px;
}

.section-head {
  margin-bottom: 20px;
}

.section-label {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.section-head h2,
.portfolio-copy h2 {
  margin: 0;
  font-size: clamp(1.3rem, 2.6vw, 1.9rem);
  line-height: 1.14;
  letter-spacing: -0.03em;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.card,
.portfolio-item {
  padding: 24px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
  transition:
    transform 0.18s ease,
    border-color 0.18s ease;
}

.card.featured {
  background:
    linear-gradient(180deg, rgba(60, 99, 255, 0.1), rgba(255, 255, 255, 0.8)),
    var(--card-strong);
}

.badge {
  display: inline-block;
  margin-bottom: 14px;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
}

.card h3 {
  margin: 0 0 10px;
  font-size: 1.24rem;
  line-height: 1.2;
}

.card p,
.portfolio-item span,
.footer-inner {
  color: var(--text-soft);
}

.portfolio-inner {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 24px;
  align-items: start;
}

.portfolio-list {
  display: grid;
  gap: 14px;
}

.portfolio-item {
  display: grid;
  gap: 6px;
}

.portfolio-item strong {
  font-size: 1rem;
}

.portfolio-item:hover {
  border-color: rgba(60, 99, 255, 0.22);
  transform: translateY(-1px);
}

.site-footer {
  padding: 20px 0 36px;
  border-top: 1px solid rgba(91, 115, 160, 0.1);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.92rem;
}

.footer-links {
  display: flex;
  gap: 16px;
}

.footer-links a:hover {
  color: #facc15;
  text-shadow: 0 0 12px rgba(250, 204, 21, 0.4);
}

@media (max-width: 900px) {
  .card-grid,
  .portfolio-inner {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(var(--max-width), calc(100% - clamp(24px, 6vw, 40px)));
  }

  .header-inner {
    height: 60px;
  }

  .hero {
    padding: 60px 0 34px;
  }

  .focus,
  .portfolio {
    padding: 20px 0 42px;
  }
}