/* ============================================================
   style.css — 공통 스타일 (럭셔리 미니멀리즘)
   i-park.com 톤앤매너: 화이트 베이스, 골드 브론즈 포인트,
   넉넉한 여백, 보더리스, 대형 타이포, 절제된 표현
   ============================================================ */

/* ── RESET & VARIABLES ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* 럭셔리 미니멀 컬러 팔레트 */
  --bg:         #ffffff;
  --bg-warm:    #faf9f7;           /* 따뜻한 아이보리 화이트 */
  --bg-dark:    #1a1a1a;           /* 다크 섹션용 */
  --bg-card:    #ffffff;
  --border:     #e8e6e1;
  --border-hl:  #d4d0c8;
  --text:       #1a1a1a;           /* 거의 블랙 */
  --text-muted: #888880;           /* 중간 톤 */
  --text-light: #b5b0a8;           /* 옅은 톤 */
  --accent:     #8c7851;           /* 골드 브론즈 (핵심 포인트) */
  --accent-soft:#f5f0e8;           /* 골드 배경 */
  --accent-hover:#6b5a3e;          /* 골드 진하게 */
  --green:      #5a7a5a;           /* 자연스러운 그린 */
  --green-soft: #f0f4f0;
  --red:        #c45c5c;
  --orange:     #b88a4a;
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.04);
  --shadow-md:  0 8px 30px rgba(0,0,0,0.06);
  --shadow-lg:  0 20px 60px rgba(0,0,0,0.08);
  --shadow-xl:  0 32px 80px rgba(0,0,0,0.10);
  --font-serif: 'Playfair Display', 'Noto Serif KR', Georgia, serif;
  --font-sans:  'Inter', system-ui, sans-serif;
  --font-mono:  'JetBrains Mono', monospace;
  --radius:     6px;
  --radius-lg:  12px;
  --radius-xl:  16px;
  --transition: 0.3s ease;
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  letter-spacing: 0.01em;
}

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

/* ── UTILITIES ── */
.section-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 48px;
}

.section-eyebrow {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

/* ── FADE IN (스크롤 진입 애니메이션) ── */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ── NAV (럭셔리 미니멀) ── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 48px;
  height: 72px;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0,0,0,0.05);
}

.nav-logo {
  font-family: 'Bebas Neue', var(--font-sans);
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--text);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.logo-dot { color: var(--accent); }

.nav-links {
  display: flex;
  gap: 40px;
}

.nav-links a {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  transition: color var(--transition);
  position: relative;
}

.nav-links a:hover,
.nav-links a.active { color: var(--text); }

/* PWA 설치 버튼 */
.nav-install-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-sans);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  background: transparent;
  border: 1px solid var(--accent);
  padding: 6px 16px;
  cursor: pointer;
  transition: all var(--transition);
}

.nav-install-btn:hover {
  background: var(--accent);
  color: #fff;
}

/* 네비 활성 링크 하단 라인 */
.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0; right: 0;
  height: 1px;
  background: var(--accent);
}

.nav-badge {
  font-family: var(--font-sans);
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ── HERO (럭셔리 대형) ── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 80px;
  padding: 140px 80px 100px;
  max-width: 1400px;
  margin: 0 auto;
}

.hero-inner { flex: 1; max-width: 560px; }

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 36px;
}

.dot-live {
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.4; transform: scale(0.8); }
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.8rem, 5.5vw, 4.8rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 32px;
  color: var(--text);
}

.hero-title em {
  font-style: italic;
  color: var(--accent);
}

.hero-sub {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 2;
  margin-bottom: 48px;
  letter-spacing: 0.02em;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ── 버튼 (럭셔리) ── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--text);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 16px 36px;
  border: none;
  border-radius: 0;
  transition: all var(--transition);
}

.btn-primary:hover {
  background: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(140, 120, 81, 0.2);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 16px 36px;
  border: 1px solid var(--border);
  border-radius: 0;
  transition: all var(--transition);
}

.btn-ghost:hover {
  color: var(--text);
  border-color: var(--text);
}

/* ── HERO 카드 스택 ── */
.hero-card-stack {
  flex: 0 0 auto;
  position: relative;
  width: 340px;
  height: 320px;
}

.stack-card {
  position: absolute;
  width: 100%;
  border-radius: var(--radius-lg);
}

.stack-card--back {
  height: 260px;
  top: 40px;
  background: var(--accent-soft);
  transform: rotate(-5deg);
  opacity: 0.5;
}

.stack-card--mid {
  height: 280px;
  top: 20px;
  background: #f0ece4;
  transform: rotate(-2.5deg);
  opacity: 0.7;
}

.stack-card--front {
  height: 300px;
  top: 0;
  background: var(--bg-card);
  box-shadow: var(--shadow-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 32px;
}

.profile-avatar {
  font-size: 2.8rem;
  width: 72px; height: 72px;
  background: var(--bg-warm);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.profile-info {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-align: center;
}

.profile-info strong {
  font-weight: 600;
  font-size: 0.88rem;
  letter-spacing: 0.02em;
}

.profile-info span {
  font-size: 0.7rem;
  color: var(--text-light);
  letter-spacing: 0.06em;
}

.profile-stats {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 14px 24px;
  width: 100%;
}

.pstat { text-align: center; flex: 1; }

.pstat-n {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1;
  color: var(--accent);
}

.pstat-l {
  display: block;
  font-size: 0.6rem;
  color: var(--text-light);
  margin-top: 4px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.pstat-sep {
  width: 1px;
  height: 28px;
  background: var(--border);
}

/* ── ABOUT (넉넉한 여백) ── */
.about {
  padding: 140px 0;
  background: var(--bg-warm);
}

.about-layout {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 100px;
  align-items: start;
}

.about-title {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 2.8vw, 2.4rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.about-desc {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 2;
}

.skills-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.skill-col { display: flex; flex-direction: column; gap: 12px; }

.skill-head {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.skill-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.skill-list li {
  font-size: 0.85rem;
  color: var(--text-muted);
  padding-left: 12px;
  position: relative;
}

.skill-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--accent);
  transform: translateY(-50%);
}

/* ── PROJECTS (보더리스 카드) ── */
.projects {
  padding: 140px 0;
}

.projects-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 60px;
  flex-wrap: wrap;
  gap: 20px;
}

.projects-title {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 2.8vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

/* ── FILTER BAR ── */
.filter-bar {
  display: flex;
  gap: 4px;
}

.filter-btn {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-light);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: transparent;
  border: none;
  border-bottom: 1.5px solid transparent;
  padding: 8px 16px;
  cursor: pointer;
  transition: all var(--transition);
}

.filter-btn:hover { color: var(--text-muted); }

.filter-btn.active {
  color: var(--text);
  border-bottom-color: var(--accent);
}

/* ── PROJECT GRID ── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
}

/* ── PROJECT CARD (보더리스 럭셔리) ── */
.project-card {
  background: var(--bg-card);
  border: none;
  border-radius: 0;
  overflow: hidden;
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  animation: fadeUp 0.5s ease both;
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

.card-thumb {
  width: 100%;
  height: 240px;
  object-fit: cover;
  display: block;
  background: var(--bg-warm);
}

.card-thumb-placeholder {
  width: 100%;
  height: 240px;
  background: linear-gradient(135deg, var(--bg-warm) 0%, var(--accent-soft) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}

.card-body {
  padding: 28px 4px 8px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-category {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
}

.status-badge {
  font-size: 0.6rem;
  font-weight: 600;
  padding: 3px 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status-badge.live     { color: var(--green);  background: var(--green-soft); }
.status-badge.dev      { color: var(--orange); background: #fdf6ec; }
.status-badge.archived { color: var(--text-light); background: var(--bg-warm); }

.card-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text);
}

.card-desc {
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.8;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  margin-top: auto;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.card-tag {
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--text-light);
  letter-spacing: 0.05em;
}

.card-read-more {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
  transition: gap var(--transition);
  display: flex;
  align-items: center;
  gap: 4px;
}

.project-card:hover .card-read-more { gap: 10px; }

/* ── LOADING STATE ── */
.loading-state {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 100px 0;
  font-size: 0.82rem;
  color: var(--text-light);
  letter-spacing: 0.05em;
}

.spinner {
  width: 16px; height: 16px;
  border: 1.5px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── CONTACT (다크 섹션) ── */
.contact { padding: 0 0 140px; }

.contact-box {
  background: var(--bg-dark);
  padding: 100px 80px;
  text-align: center;
  color: #fff;
}

.contact-box .section-eyebrow {
  color: var(--accent);
}

.contact-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.contact-desc {
  font-size: 0.92rem;
  color: rgba(255,255,255,0.5);
  margin-bottom: 48px;
  letter-spacing: 0.02em;
}

.contact-links {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: transparent;
  color: rgba(255,255,255,0.7);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 14px 32px;
  border: 1px solid rgba(255,255,255,0.15);
  transition: all var(--transition);
}

.contact-link:hover {
  color: #fff;
  border-color: var(--accent);
  background: rgba(140, 120, 81, 0.15);
}

.contact-link svg {
  width: 16px; height: 16px;
}

/* ── ERROR STATE (공통) ── */
.detail-error {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.92rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  letter-spacing: 0.02em;
}

.detail-error a {
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
}

/* ── FOOTER (미니멀) ── */
.footer {
  border-top: 1px solid var(--border);
  padding: 32px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.7rem;
  color: var(--text-light);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ── 방문자 위젯 (footer 내 배치) ── */
.visitor-widget {
  display: flex;
  align-items: center;
  gap: 20px;
}

.visitor-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.visitor-value {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
  letter-spacing: -0.02em;
  text-transform: none;
}

.visitor-label {
  font-size: 0.55rem;
  font-weight: 600;
  color: var(--text-light);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.visitor-divider {
  width: 1px;
  height: 28px;
  background: var(--border);
}

/* ── Footer 위젯 컨테이너 ── */
.footer-widgets {
  display: flex;
  align-items: center;
  gap: 24px;
}

.footer-widget-divider {
  width: 1px;
  height: 28px;
  background: var(--border);
}

/* ── 실시간 접속자 위젯 ── */
.online-widget {
  display: flex;
  align-items: center;
  gap: 8px;
}

.online-dot {
  width: 6px;
  height: 6px;
  background: var(--green);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
  flex-shrink: 0;
}

.online-count {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
  letter-spacing: -0.02em;
  text-transform: none;
}

.online-label {
  font-size: 0.55rem;
  font-weight: 600;
  color: var(--text-light);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ── RESPONSIVE ── */
@media (max-width: 960px) {
  .hero {
    flex-direction: column;
    padding: 120px 32px 80px;
    text-align: center;
  }
  .hero-inner { max-width: 100%; }
  .hero-actions { justify-content: center; }
  .hero-card-stack { width: 100%; max-width: 320px; margin: 0 auto; }
  .about-layout { grid-template-columns: 1fr; gap: 48px; }
  .about { padding: 100px 0; }
  .skills-cols { grid-template-columns: repeat(3, 1fr); }
  .projects { padding: 100px 0; }
  .projects-grid { grid-template-columns: 1fr; }
  .contact-box { padding: 60px 32px; }
  .section-inner { padding: 0 32px; }
}

@media (max-width: 640px) {
  .nav { padding: 0 24px; }
  .nav-right { display: none; }
  .nav-links { gap: 24px; }
  .section-inner { padding: 0 20px; }
  .skills-cols { grid-template-columns: 1fr 1fr; }
  .footer { flex-direction: column; gap: 8px; text-align: center; padding: 24px; }
}