:root{
  --bg:#f5f4f0; --surface:#fbfbf9; --panel:#ffffff; --panel-soft:#f7f6f2;
  --ink:#1c1c1a; --ink-hover:#3a3935; --ink-2:#55534d; --sub:#7a776f; --muted:#8a877f;
  --line:#e3e1db; --line-2:#dcdad3; --line-3:#efeee9; --hover:#efeee9; --soft:#f3f2ee; --track:#ebe9e3;
  --accent:#f0436d; /* 형광펜 핑크 */
  --pen:#2948b8; /* 볼펜 파랑 */
  --paper:#fffef8; --rule:#cfe0f3; --margin:#f3a3b5;
  --font:"IBM Plex Sans KR",sans-serif; --mono:"JetBrains Mono",monospace;
  --hand:"Gaegu","IBM Plex Sans KR",cursive;
}
*{box-sizing:border-box}
[hidden]{display:none !important}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);-webkit-font-smoothing:antialiased}
button{font:inherit;color:inherit}
.mono-label{font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--muted)}
.app{min-height:100vh;display:flex;flex-direction:column}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 28px;border-bottom:1px solid var(--line);background:var(--surface);flex-wrap:wrap}
.brand{display:flex;align-items:baseline;gap:14px;min-width:0;flex-wrap:wrap}
.brand-title{font-size:17px;font-weight:700;letter-spacing:-.01em}
.actions{display:flex;gap:8px}
.btn{height:36px;padding:0 14px;background:transparent;border:1px solid var(--line-2);border-radius:999px;font-size:13px;cursor:pointer}
.btn:hover{background:var(--hover)}
.btn--solid{background:var(--ink);color:#fff;border:none;font-weight:500}
.btn--solid:hover{background:var(--ink-hover)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
@media (max-width:640px){ .topbar{padding:14px 16px} }

/* ---------- 책상 + 공책 ---------- */
.desk{flex:1;width:100%;max-width:1160px;margin:0 auto;padding:36px 28px 56px;display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px;align-items:start}
.note{position:relative;min-width:0;padding:28px 32px 36px 72px;border-radius:6px 18px 18px 6px;background-color:var(--paper);
  background-image:linear-gradient(90deg,transparent 54px,var(--margin) 54px,var(--margin) 55px,transparent 55px,transparent 58px,var(--margin) 58px,var(--margin) 59px,transparent 59px),
  repeating-linear-gradient(to bottom,transparent 0 35px,var(--rule) 35px 36px);
  background-position:0 0,0 18px;
  box-shadow:0 1px 0 #e9e4d6,0 2px 0 #fbf9f1,0 3px 0 #e4dfcf,0 24px 50px -26px rgba(80,60,30,.35);border:1px solid #ece7d8}
.note::before{content:"";position:absolute;left:18px;top:24px;bottom:24px;width:14px;background:radial-gradient(circle at 7px 7px,var(--bg) 5px,#d9d3c3 5.5px,transparent 6.5px) 0 0/14px 44px repeat-y}
.note-head{display:flex;justify-content:space-between;align-items:center;gap:12px;font-family:var(--hand);font-size:18px;color:var(--sub);margin-bottom:18px}
.note-tag{color:var(--accent);font-weight:700;transform:rotate(-2deg)}

.names{display:flex;align-items:flex-end;gap:14px;flex-wrap:wrap}
.name-field{display:flex;flex-direction:column;gap:4px;flex:1 1 150px;min-width:0}
.name-label{font-family:var(--hand);font-size:17px;color:var(--sub)}
.name-input{width:100%;height:56px;padding:0 6px;border:none;border-bottom:2px dashed #b9c6e6;background:transparent;font-family:var(--hand);font-size:34px;font-weight:700;color:var(--pen);letter-spacing:.06em;outline:none;border-radius:0}
.name-input::placeholder{color:#cfd6e8}
.name-input:focus{border-bottom-color:var(--pen);border-bottom-style:solid}
.heart-mid{flex:0 0 auto;font-size:34px;color:var(--accent);padding-bottom:8px;animation:beat 1.4s ease-in-out infinite}
.go{flex:0 0 auto;height:52px;padding:0 24px;border:2px solid var(--ink);border-radius:999px;background:var(--accent);color:#fff;font-family:var(--hand);font-size:22px;font-weight:700;cursor:pointer;box-shadow:3px 3px 0 var(--ink);transition:transform .1s,box-shadow .1s}
.go:hover{transform:translate(-1px,-1px);box-shadow:4px 4px 0 var(--ink)}
.go:active{transform:translate(2px,2px);box-shadow:1px 1px 0 var(--ink)}
.msg{min-height:22px;margin:10px 0 0;font-family:var(--hand);font-size:18px;color:#c2262f}
@keyframes beat{0%,100%{transform:scale(1)}15%{transform:scale(1.18)}30%{transform:scale(1)}45%{transform:scale(1.1)}}

/* ---------- 결과 ---------- */
.result{margin-top:14px;display:flex;flex-direction:column;gap:22px}
.tabs{display:flex;gap:6px;flex-wrap:wrap}
.tab{height:34px;padding:0 14px;border:1.5px solid var(--line-2);border-radius:999px;background:rgba(255,255,255,.7);font-family:var(--hand);font-size:17px;color:var(--sub);cursor:pointer}
.tab.is-active{border-color:var(--pen);color:var(--pen);background:#eef2ff;font-weight:700}

.pyramid{display:flex;flex-direction:column;align-items:center;gap:6px;padding:8px 0;--cell:46px}
.prow{display:flex;gap:6px;justify-content:center}
.pcell{width:var(--cell);height:var(--cell);display:grid;place-items:center;font-family:var(--hand);font-size:calc(var(--cell) * .62);font-weight:700;color:var(--pen);line-height:1;opacity:0;transform:translateY(-8px) scale(.6)}
.pcell.is-in{animation:pop .35s cubic-bezier(.3,1.6,.6,1) forwards}
.prow--names .pcell{color:var(--ink);font-size:calc(var(--cell) * .58)}
.prow--names .pcell.b{color:var(--accent)}
.prow--first .pcell{font-size:calc(var(--cell) * .52);color:var(--ink-2)}
.prow--last .pcell{position:relative;color:#fff;z-index:0}
.prow--last .pcell::before{content:"";position:absolute;inset:4px;z-index:-1;border-radius:50%;background:var(--accent);transform:rotate(-6deg)}
@keyframes pop{to{opacity:1;transform:none}}

.score{display:flex;align-items:center;gap:22px;padding:18px 22px;border:2px solid var(--ink);border-radius:18px;background:#fff;box-shadow:4px 4px 0 var(--ink);transform:rotate(-.6deg)}
.score.is-in{animation:stamp .5s cubic-bezier(.2,1.5,.5,1)}
@keyframes stamp{from{transform:scale(1.25) rotate(-6deg);opacity:0}to{transform:rotate(-.6deg);opacity:1}}
.score-heart{flex:0 0 96px;width:96px}
.score-heart svg{display:block;width:100%;height:auto;overflow:visible}
.h-bg{fill:#ffe3ea}
.h-fill{fill:var(--accent);transform:translateY(92px);transition:transform 1.1s cubic-bezier(.3,.9,.3,1)}
.h-line{fill:none;stroke:var(--ink);stroke-width:3;stroke-linejoin:round}
.score-text{display:flex;flex-direction:column;gap:2px;min-width:0}
.score-pair{font-family:var(--hand);font-size:19px;color:var(--sub)}
.score-num{font-family:var(--mono);font-size:58px;font-weight:500;letter-spacing:-.04em;line-height:1;color:var(--ink)}
.score-num small{font-size:26px;margin-left:2px;color:var(--accent)}
.score-comment{font-family:var(--hand);font-size:21px;font-weight:700;color:var(--pen);line-height:1.3;word-break:keep-all}
.result-actions{display:flex;gap:8px;flex-wrap:wrap}
.result-actions .btn{background:#fff}
.fun-note{margin:0;font-family:var(--hand);font-size:17px;color:var(--sub)}

/* ---------- 사이드 ---------- */
.side{display:flex;flex-direction:column;gap:14px;min-width:0}
.side-card{padding:18px;border:1px solid var(--line);border-radius:14px;background:var(--panel)}
.how{margin:12px 0 0;padding:0;list-style:none;counter-reset:h;display:flex;flex-direction:column;gap:9px;font-size:13px;line-height:1.6;color:var(--ink-2)}
.how li{display:flex;gap:10px}
.how li::before{counter-increment:h;content:counter(h);flex:0 0 20px;height:20px;display:grid;place-items:center;border-radius:50%;background:var(--accent);color:#fff;font-family:var(--mono);font-size:11px;margin-top:2px}
.how em{font-style:normal;color:var(--sub)}
.table-card summary{cursor:pointer;font-size:13px;color:var(--ink-2);display:flex;gap:10px;align-items:baseline;list-style:none}
.table-card summary::-webkit-details-marker{display:none}
.table-card summary::after{content:"+";margin-left:auto;font-family:var(--mono);color:var(--muted)}
.table-card[open] summary::after{content:"−"}
.stroke-table{margin-top:14px;display:grid;grid-template-columns:repeat(5,1fr);gap:4px}
.st{display:flex;flex-direction:column;align-items:center;padding:5px 0;border-radius:8px;background:var(--soft)}
.st b{font-size:15px}
.st span{font-family:var(--mono);font-size:10.5px;color:var(--sub)}
.st-head{grid-column:1/-1;margin-top:6px;font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;color:var(--muted)}
.side-small{margin:12px 0 0;font-size:12px;line-height:1.6;color:var(--sub)}

.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%);padding:10px 18px;border-radius:999px;background:var(--ink);color:#fff;font-size:13px;z-index:100;box-shadow:0 10px 30px rgba(0,0,0,.2);animation:toast .25s ease-out;max-width:calc(100% - 32px);text-align:center}
@keyframes toast{from{opacity:0;transform:translate(-50%,8px)}}

@media (max-width:900px){
  .desk{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:640px){
  .desk{padding:20px 16px 40px;gap:18px}
  .note{padding:20px 16px 26px 40px;background-image:linear-gradient(90deg,transparent 28px,var(--margin) 28px,var(--margin) 29px,transparent 29px),repeating-linear-gradient(to bottom,transparent 0 35px,var(--rule) 35px 36px)}
  .note::before{left:8px;width:12px;background-size:12px 40px}
  .names{gap:8px}
  .name-field{flex-basis:110px}
  .name-input{font-size:28px;height:48px}
  .heart-mid{font-size:26px}
  .go{width:100%;margin-top:6px}
  .score{flex-direction:column;align-items:flex-start;gap:12px;padding:16px}
  .score-heart{flex-basis:auto;width:72px}
  .score-num{font-size:48px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important}
}

/* 다크 모드 (인쇄는 라이트 그대로). 공책은 밤에 펼친 어두운 종이 톤으로 */
@media screen{
  :root[data-theme="dark"]{
    color-scheme:dark;
    --bg:#131216; --surface:#18171c; --panel:#1d1c22; --panel-soft:#222127;
    --ink:#ebeaf0; --ink-hover:#ffffff; --ink-2:#c8c6d0; --sub:#a09eaa; --muted:#8a8894;
    --line:#2d2c34; --line-2:#38373f; --line-3:#25242b; --hover:#29282f; --soft:#25242b; --track:#33323a;
    --accent:#ff6b8f; --pen:#93a8ff;
    --paper:#1d1c22; --rule:rgba(147,168,255,.16); --margin:rgba(255,107,143,.38);
  }
  :root[data-theme="dark"] .btn--solid,:root[data-theme="dark"] .toast{color:var(--bg)}
  :root[data-theme="dark"] .note{border-color:var(--line-2);box-shadow:0 1px 0 #2a2930,0 2px 0 #19181d,0 3px 0 #2a2930,0 24px 50px -26px rgba(0,0,0,.7)}
  :root[data-theme="dark"] .note::before{background:radial-gradient(circle at 7px 7px,var(--bg) 5px,#45434d 5.5px,transparent 6.5px) 0 0/14px 44px repeat-y}
  :root[data-theme="dark"] .name-input{border-bottom-color:#4b5578}
  :root[data-theme="dark"] .name-input::placeholder{color:#4f5670}
  :root[data-theme="dark"] .go{border-color:#0b0a0d;color:#1a0a10;box-shadow:3px 3px 0 #4a4852}
  :root[data-theme="dark"] .go:hover{box-shadow:4px 4px 0 #4a4852}
  :root[data-theme="dark"] .go:active{box-shadow:1px 1px 0 #4a4852}
  :root[data-theme="dark"] .msg{color:#ff7b84}
  :root[data-theme="dark"] .tab{background:rgba(255,255,255,.03)}
  :root[data-theme="dark"] .tab.is-active{background:rgba(147,168,255,.14)}
  :root[data-theme="dark"] .prow--last .pcell{color:#1a0a10}
  :root[data-theme="dark"] .score{background:var(--panel);border-color:var(--line-2);box-shadow:4px 4px 0 #4a4852}
  :root[data-theme="dark"] .h-bg{fill:#3a2129}
  :root[data-theme="dark"] .result-actions .btn{background:var(--panel)}
  :root[data-theme="dark"] .how li::before{color:#1a0a10}
}
@media screen and (max-width:640px){
  :root[data-theme="dark"] .note::before{background-size:12px 40px}
}