/* ==========================================================================
   보라-검정 그라데이션 테마 및 세련된 모던 레이아웃 (정석 스타일링)
   ========================================================================== */

:root {
  --bg-gradient: linear-gradient(180deg, #120a21 0%, #06040a 100%);
  --surface: rgba(255, 255, 255, 0.03);
  --surface-soft: rgba(255, 255, 255, 0.015);
  --ink: #f2edf9;
  --muted: #a094b7;
  --light: #7b6f93;
  --line: rgba(255, 255, 255, 0.08);
  --line-soft: rgba(255, 255, 255, 0.04);
  --accent: #b388ff; /* 단정한 연보라 포인트 */
  --radius: 8px;
  --container: 1020px;
}

*, *::before, *::after { 
  box-sizing: border-box; 
  margin: 0; 
  padding: 0; 
}

html { 
  scroll-behavior: smooth; 
}

body {
  background: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Pretendard Variable", Pretendard, system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

.container {
  width: min(var(--container), calc(100% - 40px));
  margin: 0 auto;
}

/* 1. 스티키 탑바 내비게이션 */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  height: 56px;
  border-bottom: 1px solid var(--line-soft);
  background: rgba(18, 10, 33, 0.85);
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
}

.topbar-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 26px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.98rem;
  font-weight: 800;
  white-space: nowrap;
  color: #ffffff;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background: var(--accent);
  color: #120a21;
  font-size: 0.75rem;
  font-weight: 900;
  border-radius: 6px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.nav a {
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 600;
  transition: color 0.2s;
}

.nav a:hover { 
  color: var(--accent); 
}

/* 2. 히어로 레이아웃 영역 */
.hero {
  min-height: calc(100vh - 56px);
  padding: clamp(54px, 8vh, 88px) 0;
  border-bottom: 1px solid var(--line-soft);
  display: flex;
  align-items: center;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: clamp(34px, 7vw, 86px);
  align-items: center;
}

h1 {
  margin-bottom: 20px;
  color: #ffffff;
  font-size: clamp(3.2rem, 7vw, 5.5rem);
  font-weight: 900;
  line-height: 1.05;
}

.lead {
  color: var(--ink);
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 16px;
}

.intro {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.75;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
}

/* 3. 버튼 컴포넌트 */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 600;
  transition: all 0.2s;
}

.button.primary {
  background: var(--accent);
  color: #120a21;
  border-color: transparent;
}

.button:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.button.primary:hover {
  background: #d0b3ff;
  color: #120a21;
}

/* 4. 우측 프로필 및 터미널 컴포넌트 */
.profile {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: rgba(20, 15, 30, 0.6);
  overflow: hidden;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.4);
}

.profile-visual {
  padding: 16px;
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--line-soft);
}

.terminal {
  height: 164px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 6px;
  background: #0b0714;
  color: #d0c7de;
  overflow: hidden;
}

.terminal-top {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 28px;
  padding: 0 10px;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  background: rgba(255,255,255,0.02);
}

.dot { width: 8px; height: 8px; border-radius: 99px; }
.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27c93f; }

.terminal-body {
  padding: 14px;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.78rem;
  line-height: 1.5;
}

.terminal-body span { color: var(--accent); }
.terminal-body strong { color: #ffffff; font-weight: 700; }
.terminal-body em { color: var(--muted); font-style: normal; }

.profile-body { padding: 20px; }
.profile h2 { margin-bottom: 14px; font-size: 1rem; font-weight: 800; color: #ffffff; }
.profile dl { display: grid; gap: 12px; }

.profile-row {
  display: grid;
  gap: 2px;
  padding-top: 10px;
  border-top: 1px solid var(--line-soft);
}
.profile-row:first-child { padding-top: 0; border-top: 0; }
.profile dt { color: var(--light); font-size: 0.75rem; font-weight: 700; }
.profile dd { color: var(--ink); font-size: 0.92rem; font-weight: 600; }

/* 5. 공통 명확한 레프트 라벨 섹션 그리드 구조 */
section {
  padding: 80px 0;
  border-bottom: 1px solid var(--line-soft);
}

.section-grid {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: clamp(30px, 5vw, 70px);
  align-items: start;
}

.label {
  position: sticky;
  top: 86px;
  color: var(--light);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.section-title {
  margin-bottom: 24px;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 800;
  line-height: 1.25;
  color: #ffffff;
}

.copy {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.8;
}
.copy p + p { margin-top: 16px; }

/* 6. 사각형 통계(Stats) 박스 구조 컴포넌트 */
.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 30px;
}

.stat {
  min-height: 104px;
  padding: 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--surface);
}

.stat strong {
  display: block;
  color: var(--accent);
  font-size: 1.5rem;
  font-weight: 900;
}

.stat span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.4;
}

/* 7. 타임라인 리스트 */
.timeline { display: grid; gap: 12px; }
.timeline-item {
  display: grid;
  grid-template-columns: 130px minmax(0, 1fr);
  gap: 20px;
  padding: 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--surface);
}

.date {
  color: var(--light);
  font-size: 0.86rem;
  font-weight: 700;
}

.timeline-item h3 { margin-bottom: 6px; color: #ffffff; font-size: 1.05rem; font-weight: 800; }
.timeline-item p { color: var(--muted); font-size: 0.94rem; }

/* 8. 프로젝트 및 스택 카드 컴포넌트 구조 */
.projects, .cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.project, .card {
  padding: 22px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--surface);
}

.project h3, .card h3 { margin-bottom: 8px; color: #ffffff; font-size: 1.1rem; font-weight: 800; }
.project p, .card p { color: var(--muted); font-size: 0.94rem; line-height: 1.65; }

.meta { margin-bottom: 6px; color: var(--light); font-size: 0.78rem; font-weight: 700; text-transform: uppercase; }

.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 16px; }
.tag {
  display: inline-flex;
  align-items: center;
  min-height: 25px;
  padding: 0 10px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line-soft);
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 600;
}

/* 스택 리스트 내부 디자인 */
.skill-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.skill {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  border: 1px solid var(--line-soft);
  border-radius: 6px;
  background: var(--surface-soft);
  color: var(--ink);
  font-size: 0.86rem;
  font-weight: 600;
}

/* 9. FAQ 아코디언 컴포넌트 구조 */
.faq { border-top: 1px solid var(--line); margin-top: 10px; }
.faq-item { border-bottom: 1px solid var(--line-soft); padding: 20px 0; }
.faq-item summary { list-style: none; cursor: pointer; }
.faq-item summary::-webkit-details-marker { display: none; }

.question {
  display: flex;
  justify-content: space-between;
  color: #ffffff;
  font-size: 1.02rem;
  font-weight: 700;
}
.question::after { content: "+"; color: var(--light); transition: transform 0.2s; }
.faq-item[open] .question::after { transform: rotate(45deg); color: var(--accent); }
.answer { padding-top: 12px; color: var(--muted); font-size: 0.96rem; line-height: 1.7; }

/* 10. 연락처 그리드 및 렉트 인프라 */
.contact-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-top: 10px; }
.contact {
  display: block;
  min-height: 104px;
  padding: 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--surface);
}
.contact span { display: block; margin-bottom: 6px; color: var(--light); font-size: 0.76rem; font-weight: 700; }
.contact strong { display: block; color: #ffffff; font-size: 0.95rem; overflow-wrap: anywhere; }
.link-block:hover { border-color: var(--accent); }

/* 11. 미니멀 오디오 플레이어 정렬 */
.audio-container { margin-top: 40px; }
.audio-section {
  padding: 24px 0 0;
  border-top: 1px solid var(--line-soft);
}
.audio-section p { font-size: 0.82rem; color: var(--light); margin-bottom: 10px; }
audio { width: 100%; height: 32px; opacity: 0.6; }

/* 12. 푸터 아키텍처 및 카운터 */
footer {
  padding: 60px 0 40px;
  border-top: 1px solid var(--line-soft);
  margin-top: 80px;
  background: rgba(10, 6, 18, 0.5);
}
.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}
.quote { font-size: 1.05rem; color: var(--ink); font-style: italic; }
.footer-meta { color: var(--light); font-size: 0.82rem; }
.visitor-counter { margin-top: 6px; font-size: 0.82rem; }
#counter-val { color: var(--accent); font-weight: 700; }

/* 이스터에그 모달 제어 링크 */
.secret-trigger { color: rgba(255, 255, 255, 0.02); font-size: 0.8rem; cursor: default; }
.secret-trigger:hover { color: var(--light); }

.modal {
  display: none;
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.8);
  z-index: 1000;
  justify-content: center;
  align-items: center;
}
.modal-board {
  background: #120a21;
  border: 1px solid var(--line);
  padding: 30px;
  text-align: center;
  max-width: 380px;
  width: 85%;
  border-radius: 6px;
}
.modal-board h3 { color: #ffffff; margin-bottom: 10px; }
.modal-board p { color: var(--muted); font-size: 0.9rem; }
.close-button {
  margin-top: 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--ink);
  padding: 6px 16px;
  border-radius: 4px;
  cursor: pointer;
}

/* ==========================================================================
   미디어 쿼리 - 브라우저 규격별 유연한 전환 (Responsive)
   ========================================================================== */
@media (max-width: 940px) {
  .hero-grid, .section-grid { grid-template-columns: 1fr; }
  .label { position: static; margin-bottom: -10px; }
  .profile { width: 100%; max-width: 450px; justify-self: center; }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .projects, .cards { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .nav { display: none; }
  .stats, .contact-grid { grid-template-columns: 1fr; }
  .timeline-item { grid-template-columns: 1fr; gap: 6px; }
}