/* =========================================================
   Portfolio Hub — Dark Navy + Brandlogy
   포트폴리오 PPT 톤과 통일 (디자인 시스템 그대로 차용)
   ========================================================= */
:root {
  /* === Color Palette (outputs/design-system/design-system.md) === */
  --c-bg:        #0A0E1A;     /* 딥 네이비 — 배경 */
  --c-bg-2:      #111827;     /* 다크 블루 — 서브 배경 */
  --c-card:      #1A2035;     /* 다크 카드 */
  --c-card-2:    #232a45;     /* 카드 hover */
  --c-border:    #2A3A5C;     /* 다크 보더 */
  --c-cyan:      #00D4FF;     /* 사이언 — 주 액센트 */
  --c-cyan-soft: rgba(0, 212, 255, 0.18);
  --c-purple:    #7B3FB8;     /* 미드 퍼플 — 보조 */
  --c-yellow:    #F5C518;     /* 옐로우 오렌지 — 강조 */
  --c-text:      #F0F0F5;     /* 본문 */
  --c-text-soft: #A0A8B8;     /* 보조 */
  --c-text-dim:  #6E7891;     /* 흐릿 */

  --r-sm: 4px;
  --r-md: 8px;
  --r-lg: 12px;

  --font-kr: 'Pretendard', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-en: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.32);
  --shadow-card-hover: 0 12px 40px rgba(0, 212, 255, 0.18), 0 4px 12px rgba(0, 0, 0, 0.4);
  --glow-cyan: 0 0 12px rgba(0, 212, 255, 0.35);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-kr);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* === Background dots (subtle texture, like PPT 슬라이드) === */
body::before {
  content: '';
  position: fixed; inset: 0;
  background:
    radial-gradient(circle at 1px 1px, rgba(0, 212, 255, 0.04) 1px, transparent 0);
  background-size: 32px 32px;
  pointer-events: none;
  z-index: 0;
}
body::after {
  content: '';
  position: fixed; inset: 0;
  background:
    radial-gradient(ellipse at 50% -10%, rgba(0, 212, 255, 0.10), transparent 55%),
    radial-gradient(ellipse at 100% 80%, rgba(123, 63, 184, 0.08), transparent 50%);
  pointer-events: none;
  z-index: 0;
}
.hero, .docs, .footer { position: relative; z-index: 1; }

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

/* ================ Hero ================ */
.hero {
  padding: 80px 32px 64px;
  border-bottom: 1px solid var(--c-border);
  background:
    linear-gradient(180deg, rgba(0, 212, 255, 0.04), transparent 70%),
    var(--c-bg);
}
.hero-inner {
  max-width: 960px;
  margin: 0 auto;
  text-align: center;
}
.hero-eyebrow {
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 700;
  color: var(--c-cyan);
  letter-spacing: 0.32em;
  text-transform: uppercase;
  text-shadow: var(--glow-cyan);
  margin-bottom: 24px;
}
.hero-name {
  font-size: clamp(40px, 6vw, 56px);
  font-weight: 800;
  margin: 0 0 8px;
  letter-spacing: -0.02em;
  color: var(--c-text);
}
.hero-role {
  font-size: clamp(15px, 1.6vw, 18px);
  color: var(--c-cyan);
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 24px;
}
.hero-slogan {
  font-size: clamp(17px, 2.2vw, 22px);
  font-weight: 500;
  color: var(--c-text);
  max-width: 720px;
  margin: 0 auto 28px;
  line-height: 1.5;
}
.hero-meta {
  display: flex;
  justify-content: center;
  gap: 12px;
  font-size: 13px;
  color: var(--c-text-soft);
  letter-spacing: 0.02em;
}
.hero-meta .dot { color: var(--c-text-dim); }

/* ================ Documents ================ */
.docs {
  max-width: 1200px;
  margin: 0 auto;
  padding: 72px 32px 96px;
}
.docs-header {
  margin-bottom: 40px;
  text-align: center;
}
.docs-label {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 700;
  color: var(--c-cyan);
  letter-spacing: 0.32em;
  text-transform: uppercase;
}
.docs-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

/* === Card === */
.card {
  display: flex;
  flex-direction: column;
  padding: 28px;
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-card);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  cursor: pointer;
  min-height: 220px;
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--c-cyan);
  box-shadow: var(--shadow-card-hover);
  background: var(--c-card-2);
}
.card:hover .cta-arrow {
  transform: translateX(6px);
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}
.card-tag {
  font-family: var(--font-en);
  font-size: 10px;
  font-weight: 700;
  color: var(--c-cyan);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 4px 10px;
  background: var(--c-cyan-soft);
  border-radius: var(--r-sm);
}
.card-meta {
  font-family: var(--font-en);
  font-size: 11px;
  color: var(--c-text-soft);
  letter-spacing: 0.06em;
}
.card-title {
  font-size: 22px;
  font-weight: 700;
  margin: 0 0 12px;
  letter-spacing: -0.01em;
  color: var(--c-text);
}
.card-desc {
  font-size: 14px;
  color: var(--c-text-soft);
  line-height: 1.6;
  margin: 0 0 24px;
  flex: 1;
}
.card-cta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 600;
  color: var(--c-cyan);
  letter-spacing: 0.04em;
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--c-border);
}
.cta-arrow {
  transition: transform 0.2s ease;
  font-weight: 400;
}

/* === Feature card (PPT 2종 강조) === */
.card-feature {
  border-color: rgba(0, 212, 255, 0.32);
  background: linear-gradient(135deg, var(--c-card) 0%, rgba(0, 212, 255, 0.04) 100%);
}
.card-feature .card-tag {
  color: var(--c-yellow);
  background: rgba(245, 197, 24, 0.12);
}

/* ================ Responsive (Tablet ≥ 720px) ================ */
@media (min-width: 720px) {
  .docs-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}

/* ================ Responsive (Desktop ≥ 1024px) ================ */
@media (min-width: 1024px) {
  .docs-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
  }
  /* 5개 카드 — 2행 (3+2). 마지막 행 2개를 가운데 정렬은 안 하고 좌측 정렬 유지 */
  .card {
    min-height: 260px;
  }
}

/* ================ Footer ================ */
.footer {
  border-top: 1px solid var(--c-border);
  padding: 32px;
  background: var(--c-bg-2);
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  text-align: center;
}
.footer-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--c-text);
}
.footer-email {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 13px;
  color: var(--c-cyan);
  letter-spacing: 0.04em;
  margin-top: 4px;
  transition: opacity 0.2s ease;
}
.footer-email:hover {
  opacity: 0.7;
}
.footer-right {
  font-family: var(--font-en);
  font-size: 11px;
  color: var(--c-text-dim);
  letter-spacing: 0.08em;
}

@media (min-width: 720px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
  .footer-left {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ================ Small mobile tweaks ================ */
@media (max-width: 480px) {
  .hero { padding: 56px 20px 48px; }
  .docs { padding: 56px 20px 72px; }
  .card { padding: 24px; min-height: 200px; }
  .card-title { font-size: 20px; }
}

/* ================ Accessibility ================ */
.card:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 2px;
}
.footer-email:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 4px;
  border-radius: var(--r-sm);
}

/* ================ Print (PDF 인쇄 시 톤 다운) ================ */
@media print {
  body { background: white; color: black; }
  .card { background: white; border: 1px solid #ccc; }
}