:root{
  --bg-deep:#16213A;--bg-line:#2A3A5E;--primary:#4F7CFF;--primary-dark:#3559D6;--accent:#2EE6A6;
  --ink:#1F2937;--ink-soft:#5B6475;--danger:#E5484D;--surface:#fff;--page:#F5F7FB;
  --c-white:#FFFFFF;--c-peach:#FFE0D6;--c-lemon:#FFF3B8;--c-mint:#D5F5E3;--c-sky:#D6E8FF;--c-lavender:#E7DDFF;
  --font:"Pretendard","Noto Sans KR",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"JetBrains Mono",Consolas,monospace;
}
*{box-sizing:border-box}
html,body{margin:0}
body{font-family:var(--font);font-size:15px;line-height:1.6;color:var(--ink);background:var(--page)}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer}
a{color:var(--primary)}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
.hidden{display:none!important}
.mono{font-family:var(--mono)}

.btn{border:0;border-radius:10px;padding:10px 18px;min-height:44px;background:var(--primary);color:#fff;font-weight:700}
.btn:hover{background:var(--primary-dark)}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid #cfd6e4}
.btn.ghost:hover{background:#eef2fa}
.btn.danger{background:var(--danger)}
.btn.sm{min-height:36px;padding:6px 12px;font-size:14px}
.btn:disabled{opacity:.55;cursor:default}
.field{display:block;margin-bottom:14px}
.field>span{display:block;font-weight:600;font-size:14px;margin-bottom:4px}
.field input[type=text],.field input[type=password],.field textarea,.field select{width:100%;padding:10px 12px;border:1px solid #cfd6e4;border-radius:10px;background:#fff;min-height:44px}
.field textarea{resize:vertical;min-height:110px}
.hint{font-size:13px;color:var(--ink-soft)}
.err{color:var(--danger);font-size:14px;min-height:20px}

.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;text-decoration:none;color:inherit}
.brand img{width:32px;height:32px}

.topbar{display:flex;align-items:center;justify-content:space-between;padding:14px 24px;background:#fff;border-bottom:1px solid #e3e8f2}
.wrap{max-width:960px;margin:0 auto;padding:28px 20px}
.panel{background:#fff;border-radius:18px;padding:22px;box-shadow:0 2px 8px rgba(20,30,60,.08);margin-bottom:20px}
.boardlist{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}
.boardcard{display:block;text-decoration:none;color:inherit;background:#fff;border-radius:14px;padding:18px;box-shadow:0 2px 8px rgba(20,30,60,.1);border-top:4px solid var(--accent);transition:transform .15s}
.boardcard:hover{transform:translateY(-2px)}
.boardcard h3{margin:0 0 6px;font-size:17px}
.boardcard p{margin:0;color:var(--ink-soft);font-size:14px}
.tag{display:inline-block;font-size:12px;padding:1px 8px;border-radius:99px;background:#e8eefc;color:var(--primary-dark);margin-right:4px}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.adminrow{display:flex;justify-content:space-between;gap:12px;align-items:center;padding:12px 0;border-bottom:1px solid #eef1f7;flex-wrap:wrap}
.adminrow:last-child{border:0}

.overlay{position:fixed;inset:0;background:rgba(10,15,30,.6);display:flex;align-items:center;justify-content:center;z-index:100;padding:16px}
.modal{background:#fff;color:var(--ink);border-radius:18px;padding:24px;width:min(520px,100%);max-height:92vh;overflow:auto;box-shadow:0 20px 50px rgba(0,0,0,.35)}
.modal h2{margin:0 0 16px;font-size:20px}
.modal .actions{display:flex;justify-content:flex-end;gap:8px;margin-top:8px}
.colors{display:flex;gap:10px;margin-bottom:14px}
.colors label{cursor:pointer}
.colors input{position:absolute;opacity:0;pointer-events:none}
.colors i{display:block;width:34px;height:34px;border-radius:50%;border:1px solid #c9d1e2;box-shadow:inset 0 0 0 3px #fff}
.colors input:checked+i{outline:2px solid var(--primary);outline-offset:1px}
.colors input:focus-visible+i{outline:2px solid var(--primary);outline-offset:2px}
.c-white{background:var(--c-white)}.c-peach{background:var(--c-peach)}.c-lemon{background:var(--c-lemon)}.c-mint{background:var(--c-mint)}.c-sky{background:var(--c-sky)}.c-lavender{background:var(--c-lavender)}
.colors .c-white i,.colors i.c-white{background:var(--c-white)}
.colors i.c-peach{background:var(--c-peach)}.colors i.c-lemon{background:var(--c-lemon)}.colors i.c-mint{background:var(--c-mint)}.colors i.c-sky{background:var(--c-sky)}.colors i.c-lavender{background:var(--c-lavender)}

body.boardpage{background:var(--bg-deep) url(/img/pattern.svg);background-attachment:fixed;color:#fff;min-height:100vh}
body.boardpage.bg-navy{background:var(--bg-deep)}
body.boardpage.bg-gray{background:#3A3F4B}
body.boardpage.bg-image{background-size:cover;background-position:center;background-attachment:fixed}
.shade{position:fixed;inset:0;background:rgba(0,0,0,.45);pointer-events:none;z-index:0}
.bhead{position:relative;z-index:2;display:flex;align-items:flex-start;justify-content:space-between;gap:16px;padding:18px 24px 8px}
.bhead h1{margin:0;font-size:28px;font-weight:800;line-height:1.25}
.bhead p{margin:4px 0 0;color:#d7def0;max-width:720px;white-space:pre-wrap}
.bhead .right{display:flex;gap:8px;align-items:center;flex-wrap:wrap;justify-content:flex-end}
.pill{font-size:13px;padding:4px 12px;border-radius:99px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);color:#fff;white-space:nowrap}
button.pill:hover{background:rgba(255,255,255,.25)}
.badge{background:rgba(255,200,60,.2);border-color:rgba(255,200,60,.6)}
.logo{display:flex;align-items:center;gap:8px;color:#fff;text-decoration:none;font-weight:800;margin-bottom:6px}
.logo img{width:26px;height:26px}

.basic{position:relative;z-index:1;column-width:290px;column-gap:16px;padding:12px 24px 110px;min-height:60vh}
.card{position:relative;break-inside:avoid;margin:0 0 16px;border-radius:14px;padding:16px;color:var(--ink);box-shadow:0 2px 8px rgba(0,0,0,.18);transition:box-shadow .15s,transform .15s;overflow-wrap:anywhere;display:block;width:100%}
.card:hover{box-shadow:0 6px 16px rgba(0,0,0,.24);transform:translateY(-2px)}
.card h3{margin:0 0 6px;font-size:17px;font-weight:700;line-height:1.35}
.card .body{white-space:pre-wrap;font-size:15px;line-height:1.6}
.card .body a{color:#2147c7}
.card img.thumb{display:block;max-width:100%;max-height:300px;border-radius:10px;margin-top:10px;cursor:zoom-in}
.filechip{display:inline-flex;align-items:center;gap:6px;margin-top:10px;padding:6px 12px;border-radius:99px;background:rgba(0,0,0,.07);color:var(--ink);text-decoration:none;font-size:14px;max-width:100%}
.filechip:hover{background:rgba(0,0,0,.12)}
.card .meta{display:flex;justify-content:space-between;align-items:center;margin-top:12px;padding-top:8px;border-top:1px solid rgba(0,0,0,.1);font-size:13px;color:var(--ink-soft)}
.card .meta .mono{font-size:12px}
.menubtn{border:0;background:transparent;font-size:20px;line-height:1;padding:4px 8px;border-radius:8px;min-width:36px;min-height:32px}
.menubtn:hover{background:rgba(0,0,0,.1)}
.popmenu{position:absolute;right:10px;bottom:44px;z-index:20;background:#fff;color:var(--ink);border-radius:12px;box-shadow:0 8px 24px rgba(0,0,0,.3);padding:6px;min-width:170px}
.popmenu button{display:block;width:100%;text-align:left;border:0;background:transparent;padding:9px 12px;border-radius:8px;min-height:40px}
.popmenu button:hover{background:#eef2fa}
.popmenu .sep{font-size:12px;color:var(--ink-soft);padding:6px 12px 2px}
.popmenu .del{color:var(--danger)}
.empty{color:#cbd5ee;text-align:center;padding:60px 0;column-span:all}
.sentinel{height:1px;column-span:all}

.fab{position:fixed;right:24px;bottom:24px;width:56px;height:56px;border-radius:50%;border:0;background:var(--primary);color:#fff;font-size:30px;line-height:1;box-shadow:0 6px 18px rgba(0,0,0,.4);z-index:30}
.fab:hover{background:var(--primary-dark)}

.sectionwrap{position:relative;z-index:1}
.sections{display:flex;gap:16px;overflow-x:auto;padding:12px 24px 24px;height:calc(100vh - 118px);scroll-snap-type:x proximity;align-items:stretch}
.section{flex:0 0 320px;display:flex;flex-direction:column;background:rgba(255,255,255,.12);backdrop-filter:blur(6px);border-radius:16px;scroll-snap-align:start;min-height:0}
.section .shead{display:flex;align-items:center;gap:8px;padding:12px 14px 8px}
.section .shead h2{flex:1;margin:0;font-size:17px;font-weight:700;overflow-wrap:anywhere}
.section .shead .mono{font-size:12px;opacity:.75}
.iconbtn{width:36px;height:36px;border-radius:50%;border:0;background:rgba(255,255,255,.2);color:#fff;font-size:20px;line-height:1;flex:none}
.iconbtn:hover{background:rgba(255,255,255,.34)}
.slist{flex:1;overflow-y:auto;padding:4px 12px 12px;min-height:80px}
.slist .card{margin-bottom:12px}
.card.dragging{opacity:.45;transform:rotate(2deg)}
.dropline{height:4px;border-radius:2px;background:var(--accent);margin:0 0 12px}
.addsection{flex:0 0 260px;align-self:flex-start}
.navbtn{position:fixed;top:50%;z-index:30;width:44px;height:44px;border-radius:50%;border:0;background:rgba(0,0,0,.5);color:#fff;font-size:22px}
.navbtn:hover{background:rgba(0,0,0,.75)}
.navbtn.l{left:8px}.navbtn.r{right:8px}

.viewer{position:fixed;inset:0;background:rgba(0,0,0,.82);z-index:120;display:flex;align-items:center;justify-content:center;padding:24px}
.viewer img{max-width:100%;max-height:100%;border-radius:8px}
.viewer button{position:absolute;top:16px;right:16px;width:44px;height:44px;border-radius:50%;border:0;background:rgba(255,255,255,.2);color:#fff;font-size:22px}
.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%);background:#111827;color:#fff;padding:10px 18px;border-radius:10px;z-index:200;box-shadow:0 6px 18px rgba(0,0,0,.4);max-width:90vw}
.center{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}

@media (max-width:640px){
  .bhead{flex-direction:column;padding:14px 16px 4px}
  .bhead h1{font-size:23px}
  .basic{padding:10px 14px 100px;column-width:100%}
  .sections{padding:10px 14px 24px;height:calc(100vh - 150px)}
  .section{flex-basis:86vw}
  .overlay{align-items:flex-end;padding:0}
  .modal{border-radius:18px 18px 0 0;width:100%;padding:20px}
  .navbtn{top:auto;bottom:24px}
  .navbtn.l{left:14px}.navbtn.r{left:68px;right:auto}
  .fab{right:16px;bottom:24px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}