:root{
  --bg:#ffffff;
  --text:#111;
  --muted:#777;
  --line:#eaeaea;
  --panel:#f6f6f6;
  --shadow: 0 14px 40px rgba(0,0,0,.12);
}

body.dark{
  --bg:#0c0c0c;
  --text:#fff;
  --muted:#aaa;
  --line:#222;
  --panel:#141414;
  --shadow: 0 18px 50px rgba(0,0,0,.45);
}

*{ box-sizing:border-box; }
body{
  margin:0;
  font-family:'Pretendard',sans-serif;
  background:var(--bg);
  color:var(--text);
  transition:.25s;
}
a{ color:inherit; text-decoration:none; }

.wrap{
  display:grid;
  grid-template-columns:260px 1fr;
  min-height:100vh;
}

/* Desktop sidebar */
.side{
  border-right:1px solid var(--line);
  padding:50px 20px;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:26px;
}
.logo-link{ display:block; }
.logo-box{ width:200px; }
.logo-box img{
  width:100%;
  height:auto;
  object-fit:contain;
  transition:.25s;
}

.nav{
  width:100%;
  display:flex;
  flex-direction:column;
  gap:8px;
  margin-top:6px;
}
.nav a{
  padding:10px 12px;
  border-radius:14px;
  color:var(--muted);
  border:1px solid transparent;
  letter-spacing:.08em;
  font-size:13px;
}
.nav a:hover{
  color:var(--text);
  background:var(--panel);
  border-color:var(--line);
}
.nav a.active{
  color:var(--text);
  background:var(--panel);
  border-color:var(--line);
  font-weight:800;
}

.btn{
  width:100%;
  padding:12px 18px;
  border:1px solid var(--text);
  background:none;
  color:var(--text);
  border-radius:30px;
  cursor:pointer;
}
.btn:hover{ opacity:.9; }

.side-actions{
  width:100%;
  margin-top:auto;
  display:flex;
  flex-direction:column;
  gap:10px;
}

/* Main */
.main{ padding:60px; }
.h-top{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:14px;
  border-bottom:1px solid var(--line);
  padding-bottom:16px;
}
.pill{
  border:1px solid var(--line);
  background:var(--panel);
  color:var(--muted);
  padding:8px 10px;
  border-radius:999px;
  font-size:12px;
  white-space:nowrap;
}

/* Mobile Topbar */
.topbar{
  display:none;
  padding:14px;
  border-bottom:1px solid var(--line);
  justify-content:space-between;
  align-items:center;
  gap:10px;
}
.topbar-left{
  display:flex;
  align-items:center;
  gap:10px;
  min-width:0;
}
.topbar .logo{
  width:140px;
  height:auto;
  display:block;
}
.iconbtn{
  border:1px solid var(--line);
  background:none;
  padding:8px 14px;
  border-radius:20px;
  cursor:pointer;
  color:var(--text);
}

/* Drawer */
.overlay{
  position:fixed;
  inset:0;
  background: rgba(0,0,0,.35);
  opacity:0;
  pointer-events:none;
  transition:.2s;
  z-index:90;
}
.overlay.open{
  opacity:1;
  pointer-events:auto;
}
.drawer{
  position:fixed;
  top:0; left:0;
  height:100%;
  width:min(86vw, 360px);
  background: var(--bg);
  border-right:1px solid var(--line);
  transform: translateX(-105%);
  transition:.22s ease;
  z-index:100;
  box-shadow: var(--shadow);
  padding:16px;
  display:flex;
  flex-direction:column;
  gap:14px;
}
.drawer.open{ transform: translateX(0); }
.drawer-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  padding-bottom:12px;
  border-bottom:1px solid var(--line);
}
.drawer-nav{
  display:flex;
  flex-direction:column;
  gap:8px;
}
.drawer-nav a{
  padding:12px 12px;
  border-radius:14px;
  border:1px solid var(--line);
  background: var(--panel);
  font-weight:800;
}
.drawer-actions{
  margin-top:auto;
  display:flex;
  flex-direction:column;
  gap:10px;
  padding-top:12px;
  border-top:1px solid var(--line);
}
.note{
  color:var(--muted);
  font-size:12px;
  line-height:1.6;
}

/* Page helpers */
.page-title{
  margin:22px 0 0;
  font-size:40px;
  letter-spacing:-.02em;
}
.page-sub{
  margin-top:12px;
  color:var(--muted);
  line-height:1.7;
  max-width:60ch;
}

/* Cards / grids */
.grid-3{
  margin-top:18px;
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:14px;
}
.card{
  border:1px solid var(--line);
  background:var(--panel);
  border-radius:18px;
  padding:16px;
  transition:.2s;
}
.card:hover{ transform:translateY(-2px); }

@media(max-width:900px){
  .wrap{ grid-template-columns:1fr; }
  .side{ display:none; }
  .topbar{ display:flex; }
  .main{ padding:22px; }
  .page-title{ font-size:34px; }
  .grid-3{ grid-template-columns:1fr; }
}
#list > div:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

#list > div {
  transition: all 0.25s ease;
}

/* UI Upgrade (v3) */
/* 카드/패널 hover, 버튼 인터랙션, 입력 포커스, 부드러운 등장 애니메이션 */

/* 공통 카드/패널 느낌: list 내부 카드에 자연스럽게 적용 */
#list > div,
.card,
.panel {
  transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}

#list > div:hover,
.card:hover,
.panel:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 28px rgba(0,0,0,.16);
  border-color: rgba(255,255,255,.18);
}

/* 버튼 hover/active */
.btn,
.iconbtn {
  transition: transform .12s ease, filter .12s ease, opacity .12s ease;
}

.btn:hover,
.iconbtn:hover {
  filter: brightness(1.05);
}

.btn:active,
.iconbtn:active {
  transform: translateY(1px);
  opacity: .92;
}

/* 입력 포커스 */
input:focus,
select:focus,
textarea:focus {
  border-color: rgba(255,255,255,.28) !important;
  box-shadow: 0 0 0 4px rgba(255,255,255,.06);
}

/* 페이지 진입시 살짝 페이드업 */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.main {
  animation: fadeUp .22s ease both;
}

/* 모션 민감 사용자 배려 */
@media (prefers-reduced-motion: reduce) {
  #list > div,
  .card,
  .panel,
  .btn,
  .iconbtn,
  .main {
    transition: none !important;
    animation: none !important;
  }
}
/* ===== Home sections ===== */
.home-sections{
  margin-top:28px;
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:14px;
}

.home-card{
  border:1px solid var(--line);
  background:var(--panel);
  border-radius:18px;
  padding:18px;
  display:flex;
  flex-direction:column;
  gap:10px;
}

.home-card-title{
  font-weight:900;
  font-size:18px;
}

.home-card-desc{
  color:var(--muted);
  line-height:1.65;
  font-size:14px;
  max-width:55ch;
}

/* ===== Footer ===== */
.site-footer{
  margin-top:40px;
  border-top:1px solid var(--line);
  padding:22px 0 30px;
}

.footer-grid{
  display:grid;
  grid-template-columns: 1.2fr .8fr 1fr;
  gap:18px;
}

.footer-title{
  font-weight:900;
  margin-bottom:8px;
}

.footer-text{
  color:var(--muted);
  font-size:13px;
  line-height:1.7;
}

.footer-links{
  display:flex;
  flex-direction:column;
  gap:8px;
}

.footer-links a{
  color:var(--muted);
  border:1px solid var(--line);
  background:rgba(0,0,0,.02);
  padding:10px 12px;
  border-radius:14px;
}

body.dark .footer-links a{
  background:rgba(255,255,255,.03);
}

.footer-links a:hover{
  color:var(--text);
  background:var(--panel);
}

/* ===== Mobile ===== */
@media(max-width:900px){
  .home-sections{ grid-template-columns:1fr; }
  .footer-grid{ grid-template-columns:1fr; }
}