/* Post-it — shy.ai.kr 디자인 시스템 계승 */
:root{
  color-scheme:only light;
  --bg:#f7f7f4; --surface:#fff; --text:#171717; --muted:#666;
  --line:#d9d9d4; --accent:#2563eb; --accent-soft:#dbeafe;
  --font:"Pretendard Variable",Pretendard,-apple-system,BlinkMacSystemFont,system-ui,sans-serif;
  --measure:720px;
}
[data-theme=light]{color-scheme:only light;--bg:#f7f7f4;--surface:#fff;--text:#171717;--muted:#666;--line:#d9d9d4;--accent:#2563eb;--accent-soft:#dbeafe}
[data-theme=dark]{color-scheme:dark;--bg:#111210;--surface:#191a18;--text:#f2f2ed;--muted:#a8aaa2;--line:#343630;--accent:#7db1ff;--accent-soft:#172a46}

*{box-sizing:border-box}
/* display 를 지정한 클래스가 브라우저 기본 [hidden] 규칙을 이겨 버리므로 여기서 못박습니다.
   (선택 바가 항상 떠 있던 원인) */
[hidden]{display:none!important}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);font-size:17px;line-height:1.7;letter-spacing:-.01em;word-break:keep-all;overflow-wrap:normal;min-height:100vh;display:flex;flex-direction:column}
a{color:inherit}
button{font:inherit}
code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.92em;background:var(--accent-soft);color:var(--text);padding:.1rem .35rem;border-radius:6px}
.skip{position:fixed;left:1rem;top:-5rem;z-index:20;background:var(--text);color:var(--bg);padding:.5rem 1rem}
.skip:focus{top:1rem}

/* header */
.site-header{position:sticky;top:0;z-index:10;display:flex;align-items:center;gap:.9rem;padding:1rem max(1.25rem,calc((100vw - 1120px)/2));background:color-mix(in srgb,var(--bg) 90%,transparent);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.brand{display:grid;place-items:center;width:3.75rem;height:3.75rem;flex:0 0 auto;border-radius:15px;background:var(--bg);text-decoration:none;transition:transform .2s ease}
.brand:hover{transform:translateY(-1px)}
.brand:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.brand img{display:block;width:3.45rem;height:3.57rem;object-fit:contain}
.wordmark{font-weight:800;letter-spacing:-.04em;font-size:1.15rem}
.site-header nav{display:flex;gap:1rem;margin-left:auto}
.site-header nav a{text-decoration:none;color:var(--muted)}
.icon-button{border:1px solid var(--line);border-radius:999px;background:var(--surface);color:var(--text);width:2.5rem;height:2.5rem;flex:0 0 2.5rem;display:grid;place-items:center;cursor:pointer}

/* layout */
main{flex:1 0 auto}
main>section{max-width:1120px;margin:0 auto;padding:5rem 1.25rem;border-bottom:1px solid var(--line)}
.hero{padding-top:8rem}
h1,h2,h3{line-height:1.2;letter-spacing:-.04em}
h1{font-size:clamp(2.2rem,5.5vw,4.4rem);max-width:1050px;margin:.5rem 0 2rem}
.hero h1 span{color:var(--accent)}
h2{font-size:clamp(1.6rem,3vw,2.4rem);margin:.4rem 0 .5rem}
.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:.78rem;font-weight:800;color:var(--accent);margin:0}
.lede{font-size:1.2rem;max-width:650px}
.muted{color:var(--muted)}
.notice{padding:1rem;border-left:3px solid var(--accent);background:var(--surface)}
.badges{display:flex;flex-wrap:wrap;gap:.65rem;margin-top:2rem}
.badges span{padding:.45rem .8rem;border:1px solid var(--line);border-radius:999px;background:var(--surface);font-size:.95rem}

/* buttons */
.sim-actions{display:flex;flex-wrap:wrap;gap:.75rem}
.button{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.7rem 1.15rem;border:0;border-radius:999px;background:var(--accent);color:#fff;text-decoration:none;cursor:pointer;font-weight:600}
.button:hover{filter:brightness(1.05)}
.button:disabled{opacity:.5;cursor:default}
[data-theme=dark] .button{color:#0d1420}
.ghost-button{padding:.5rem .9rem;border:1px solid var(--line);border-radius:999px;background:var(--surface);color:var(--text);cursor:pointer}
.ghost-button:hover{border-color:var(--accent);color:var(--accent)}

/* account */
.account{display:flex;align-items:center;gap:.85rem;padding:.85rem 1.1rem;margin-bottom:2rem;border:1px solid var(--line);border-radius:999px;background:var(--surface)}
.avatar{border-radius:999px;flex:0 0 36px;background:var(--accent-soft)}
.account-meta{display:flex;flex-direction:column;line-height:1.35;min-width:0}
.account-meta b{font-size:.98rem}
.account-meta span{font-size:.85rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.account .ghost-button{margin-left:auto;flex:0 0 auto}

/* 폰 설치 패널 */
.phone-panel{margin-bottom:2rem;border:1px solid var(--line);border-radius:22px;background:var(--surface);overflow:hidden}
.phone-panel summary{display:flex;align-items:center;gap:.8rem;flex-wrap:wrap;padding:1rem 1.4rem;cursor:pointer;list-style:none}
.phone-panel summary::-webkit-details-marker{display:none}
.phone-panel summary::after{content:"+";margin-left:auto;font-size:1.3rem;color:var(--muted);line-height:1}
.phone-panel[open] summary::after{content:"−"}
.phone-panel summary b{font-size:1.05rem}
.phone-panel summary .muted{font-size:.9rem}
.phone-body{display:grid;grid-template-columns:auto minmax(0,1fr);gap:1.4rem;align-items:center;padding:0 1.4rem 1rem}
.qr{display:block;width:168px;height:168px;padding:10px;border:1px solid var(--line);border-radius:14px;background:#fff;overflow:hidden;font-size:.7rem;word-break:break-all;color:#171717}
.qr svg{display:block;width:100%;height:100%}
.phone-steps{margin:0;padding-left:1.2rem;font-size:.97rem;line-height:1.6}
.phone-steps li+li{margin-top:.35rem}
.desk-body{display:grid;grid-template-columns:auto minmax(0,1fr);gap:1.4rem;align-items:center;padding:0 1.4rem 1.2rem}
.phone-link{margin:0;padding:.8rem 1.4rem;border-top:1px solid var(--line);font-size:.88rem}
#counter.is-over{color:#dc2626;font-weight:600}

/* composer */
.composer{padding:1.4rem;border:1px solid var(--line);border-radius:22px;background:var(--surface)}
.composer textarea{display:block;width:100%;margin-top:.6rem;padding:.9rem 1rem;border:1px solid var(--line);border-radius:14px;background:var(--bg);color:var(--text);font:inherit;resize:vertical;min-height:7rem}
.composer textarea:focus-visible{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}
.composer-bar{display:flex;align-items:center;gap:1rem;margin-top:.9rem}
.composer-bar .sim-actions{margin-left:auto}
#counter{font-size:.88rem}

.list-head{margin:3rem 0 1rem}
.accordion-hint{color:var(--muted);font-size:.95rem;margin:0}

/* 선택 바 */
.selection-bar{position:sticky;top:5.75rem;z-index:5;display:flex;align-items:center;gap:1rem;flex-wrap:wrap;margin-bottom:.9rem;padding:.8rem 1.1rem;border:1px solid var(--accent);border-left-width:3px;border-radius:16px;background:color-mix(in srgb,var(--accent-soft) 70%,var(--surface));box-shadow:0 6px 20px rgba(0,0,0,.08)}
.selection-bar b{font-size:1rem}
.selection-bar .sim-actions{margin-left:auto}
.button.danger{background:#dc2626;color:#fff}
[data-theme=dark] .button.danger{background:#f87171;color:#2a0b0b}
kbd{font-family:inherit;font-size:.85em;padding:.1rem .4rem;border:1px solid var(--line);border-bottom-width:2px;border-radius:6px;background:var(--surface)}

/* notes */
.notes{list-style:none;padding:0;margin:0;display:grid;gap:.75rem}
/* 클릭으로 카드를 고르므로 카드 안 텍스트는 드래그 선택되지 않게 합니다. 복사는 복사 버튼으로. */
.note{padding:1.15rem 1.25rem;background:var(--surface);border:1px solid var(--line);border-left:3px solid transparent;border-radius:16px;transition:border-color .2s ease,background .2s ease;cursor:default;user-select:none;-webkit-user-select:none}
.note:hover{border-color:var(--line);border-left-color:var(--accent)}
.note.is-pinned{border-left-color:var(--accent);background:color-mix(in srgb,var(--accent-soft) 45%,var(--surface))}
/* 선택 표시는 파일 탐색기처럼 하이라이트로만 — 체크박스를 넣으면 카드가 들썩입니다. */
.note.is-selected{border-color:var(--accent);border-left-color:var(--accent);background:color-mix(in srgb,var(--accent-soft) 80%,var(--surface));box-shadow:inset 0 0 0 1px var(--accent)}
.note-text{margin:0;white-space:pre-wrap;overflow-wrap:anywhere;font-size:1.05rem}
.note-foot{display:flex;align-items:center;gap:.5rem;flex-wrap:wrap;margin-top:.9rem}
.note-time{font-size:.82rem;color:var(--muted);margin-right:auto}
.pin-flag{font-size:.75rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--accent)}
.note-foot button{padding:.4rem .75rem;border:1px solid var(--line);border-radius:999px;background:var(--bg);color:var(--muted);cursor:pointer;font-size:.88rem}
.note-foot button:hover{border-color:var(--accent);color:var(--accent)}
.note-foot button.primary{background:var(--accent);border-color:var(--accent);color:#fff}
[data-theme=dark] .note-foot button.primary{color:#0d1420}
.note-foot button.danger:hover{border-color:#dc2626;color:#dc2626}

/* footer + toast */
footer{max-width:1120px;width:100%;margin:auto;padding:2rem 1.25rem;display:flex;justify-content:space-between;gap:1rem;font-size:.9rem}
footer a{text-decoration:none}
.toast{position:fixed;left:50%;bottom:1.5rem;z-index:30;translate:-50% 1rem;max-width:calc(100vw - 2rem);padding:.75rem 1.15rem;border-radius:999px;background:var(--text);color:var(--bg);box-shadow:0 10px 30px rgba(0,0,0,.2);opacity:0;pointer-events:none;transition:opacity .2s ease,translate .2s ease;font-size:.95rem}
.toast.is-visible{opacity:1;translate:-50% 0}

@media(max-width:700px){
  body{font-size:16px}
  main>section{padding:3rem 1rem}
  .hero{padding-top:4.5rem}
  h1{font-size:1.85rem}
  .hero h1 span{display:block}
  .site-header{gap:.6rem;padding:.75rem 1rem}
  .brand{width:2.5rem;height:2.5rem;border-radius:10px}
  .brand img{width:2.3rem;height:2.38rem}
  .badges{display:grid;grid-template-columns:minmax(0,1fr)}
  .badges span{min-width:0;white-space:normal}
  .composer{padding:1rem;border-radius:18px}
  .phone-panel{border-radius:18px}
  .phone-panel summary,.phone-link{padding-left:1rem;padding-right:1rem}
  .phone-body{grid-template-columns:1fr;justify-items:center;padding:0 1rem 1rem}
  .desk-body{grid-template-columns:1fr;padding:0 1rem 1rem}
  .phone-steps{justify-self:stretch}
  .composer-bar{flex-wrap:wrap}
  .account{border-radius:18px}
  .toast{width:max-content;text-align:center}
  footer{flex-direction:column;gap:.35rem}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}