/* Master Hub CSS - Apple Design System */
:root {
  --color-primary: #0066cc;
  --color-ink: #1d1d1f;
  --color-muted: #7a7a7a;
  --color-parchment: #f5f5f7;
  --color-surface-pearl: #fafafc;
  --color-hairline: #e0e0e0;
  --font-display: "SF Pro Display", -apple-system, BlinkMacSystemFont, "Pretendard", sans-serif;
  --font-text: "SF Pro Text", -apple-system, BlinkMacSystemFont, "Pretendard", sans-serif;
  --radius-lg: 24px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--font-text);
  background-color: var(--color-parchment);
  color: var(--color-ink);
  line-height: 1.5;
}

.global-nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0,0,0,0.08);
  height: 52px; display: flex; align-items: center;
}

.nav-container {
  max-width: 1200px; width: 100%; margin: 0 auto; padding: 0 24px;
  display: flex; justify-content: space-between; align-items: center;
}

.brand-logo {
  font-family: var(--font-display); font-weight: 600; font-size: 17px;
  color: var(--color-ink); text-decoration: none; display: flex; align-items: center; gap: 8px;
}

.nav-menu { display: flex; gap: 28px; list-style: none; }
.nav-link { font-size: 13px; color: #515154; text-decoration: none; }
.nav-link:hover, .nav-link.active { color: var(--color-primary); }

.hero-section {
  background: linear-gradient(180deg, #ffffff 0%, var(--color-parchment) 100%);
  padding: 80px 24px 60px; text-align: center;
}

.hero-content { max-width: 800px; margin: 0 auto; }
.hero-tagline { font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-primary); margin-bottom: 10px; }
.hero-title { font-size: 50px; line-height: 1.08; letter-spacing: -0.035em; margin-bottom: 16px; }
.hero-subtitle { font-size: 19px; color: var(--color-muted); line-height: 1.45; }

.section-container { max-width: 1200px; margin: 0 auto; padding: 60px 24px; }
.section-title { font-size: 32px; letter-spacing: -0.02em; margin-bottom: 32px; }

.projects-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(350px, 1fr)); gap: 24px;
}

.project-card {
  background-color: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(0,0,0,0.06);
  padding: 32px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.04);
  display: flex; flex-direction: column; justify-content: space-between;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease;
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.08);
}

.project-card.dashed {
  background-color: transparent;
  border: 2px dashed #c7c7cc;
  box-shadow: none;
}

.card-badge {
  display: inline-block; padding: 4px 10px; border-radius: 99px;
  font-size: 11px; font-weight: 600; color: #ffffff; margin-bottom: 14px; align-self: flex-start;
}

.card-title { font-size: 24px; font-weight: 600; margin-bottom: 8px; }
.card-desc { font-size: 14px; color: #3a3a3c; line-height: 1.55; margin-bottom: 20px; }

.card-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 24px; }
.tag { padding: 4px 10px; font-size: 11px; border-radius: 6px; background-color: var(--color-parchment); color: #48484a; font-weight: 500; }

.card-actions { display: flex; gap: 10px; }
.btn-primary {
  padding: 10px 20px; font-size: 13px; font-weight: 600; border-radius: 99px;
  background-color: var(--color-primary); color: #ffffff; text-decoration: none; display: inline-block;
}
.btn-secondary {
  padding: 10px 20px; font-size: 13px; font-weight: 500; border-radius: 99px;
  background-color: var(--color-parchment); color: var(--color-ink); text-decoration: none; display: inline-block;
}

.guide-box {
  background-color: #ffffff; border-radius: var(--radius-lg); padding: 36px; border: 1px solid rgba(0,0,0,0.06);
}

.guide-steps { list-style: none; display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; }
.guide-steps li strong { display: block; font-size: 16px; margin-bottom: 6px; color: var(--color-primary); }
.guide-steps li p { font-size: 14px; color: #3a3a3c; }
.guide-steps code { font-size: 12px; font-family: monospace; background: var(--color-parchment); padding: 2px 6px; border-radius: 4px; }

footer { text-align: center; padding: 40px; font-size: 13px; color: var(--color-muted); border-top: 1px solid var(--color-hairline); }

@media (max-width: 768px) {
  .hero-title { font-size: 34px; }
  .projects-grid { grid-template-columns: 1fr; }
}