/* 발명 영재반 제출 시스템 — 공용 스타일 */

:root{
  /* 종이와 잉크 — 따뜻한 크림색 바탕에 짙은 남색 글씨 */
  --paper:#FFF8EF; --surface:#FFFFFF; --surface-2:#FFF1DF; --surface-3:#FFE1BF;
  --ink:#2A2440; --ink-2:#57506E; --ink-3:#6B6489;
  --line:#F0E2CE; --line-2:#F8F0E4;

  /* 주황 — 글짓기, 가장 중요한 버튼 */
  --brass:#F97D34; --brass-strong:#C74B0D; --brass-ink:#A8420A; --brass-soft:#FFEBDA;
  /* 청록 — 만화, 잘 되고 있다는 표시 */
  --moss:#16B7A3; --moss-strong:#0A7D70; --moss-ink:#07695E; --moss-soft:#D6F6F1;
  /* 보라 — 아이디어 */
  --grape:#8B6BFF; --grape-strong:#6B4AE8; --grape-ink:#5B3ED6; --grape-soft:#EDE7FF;
  /* 하늘 — 안내 */
  --sky:#4FAEF7; --sky-strong:#1580C9; --sky-ink:#0B6FB8; --sky-soft:#DEF0FF;
  /* 노랑 — 도장, 별, 강조 */
  --lemon:#FFC53D; --lemon-soft:#FFF4D4;

  --alert:#CE3A3F; --alert-soft:#FFE6E6;
  --ok:#177D3B; --ok-soft:#DCF5E4;

  /* 진한 색 배경 위에 얹는 글씨색 (테마에 따라 뒤집힙니다) */
  --on:#FFFFFF;

  --shadow:0 2px 0 rgba(42,36,64,.05), 0 10px 24px -14px rgba(42,36,64,.3);
  --shadow-pop:0 4px 0 rgba(42,36,64,.08), 0 16px 34px -16px rgba(42,36,64,.38);
  --r:16px; --r-sm:11px;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --paper:#1A1630; --surface:#241E40; --surface-2:#2E2750; --surface-3:#3A3163;
    --ink:#F2EEFF; --ink-2:#BFB6E0; --ink-3:#9E96C2;
    --line:#3A3163; --line-2:#2E2750;

    --brass:#FFA05E; --brass-strong:#FF8C3D; --brass-ink:#FFBE8C; --brass-soft:#3A2A1E;
    --moss:#42D6C0; --moss-strong:#2CC3AC; --moss-ink:#7FE8D8; --moss-soft:#173733;
    --grape:#A98CFF; --grape-strong:#9375FF; --grape-ink:#C6B4FF; --grape-soft:#2B2352;
    --sky:#6FC0FF; --sky-strong:#4FAEF7; --sky-ink:#9FD6FF; --sky-soft:#16304A;
    --lemon:#FFD062; --lemon-soft:#3A3018;

    --alert:#FF8A8E; --alert-soft:#3D1F22;
    --ok:#6FD98D; --ok-soft:#173A22;

    --on:#1A1630;

    --shadow:0 2px 0 rgba(0,0,0,.25), 0 10px 24px -14px rgba(0,0,0,.7);
    --shadow-pop:0 4px 0 rgba(0,0,0,.3), 0 16px 34px -16px rgba(0,0,0,.8);
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --paper:#1A1630; --surface:#241E40; --surface-2:#2E2750; --surface-3:#3A3163;
  --ink:#F2EEFF; --ink-2:#BFB6E0; --ink-3:#9E96C2;
  --line:#3A3163; --line-2:#2E2750;

  --brass:#FFA05E; --brass-strong:#FF8C3D; --brass-ink:#FFBE8C; --brass-soft:#3A2A1E;
  --moss:#42D6C0; --moss-strong:#2CC3AC; --moss-ink:#7FE8D8; --moss-soft:#173733;
  --grape:#A98CFF; --grape-strong:#9375FF; --grape-ink:#C6B4FF; --grape-soft:#2B2352;
  --sky:#6FC0FF; --sky-strong:#4FAEF7; --sky-ink:#9FD6FF; --sky-soft:#16304A;
  --lemon:#FFD062; --lemon-soft:#3A3018;

  --alert:#FF8A8E; --alert-soft:#3D1F22;
  --ok:#6FD98D; --ok-soft:#173A22;

  --on:#1A1630;

  --shadow:0 2px 0 rgba(0,0,0,.25), 0 10px 24px -14px rgba(0,0,0,.7);
  --shadow-pop:0 4px 0 rgba(0,0,0,.3), 0 16px 34px -16px rgba(0,0,0,.8);
  color-scheme:dark;
}

*{box-sizing:border-box}
html,body{margin:0}
body{
  background:var(--paper); color:var(--ink);
  font-family:"IBM Plex Sans KR","Apple SD Gothic Neo","Malgun Gothic",sans-serif;
  font-size:15.5px; line-height:1.75;
  -webkit-text-size-adjust:100%;
}
h1,h2,h3{font-family:"Jua","IBM Plex Sans KR",sans-serif; font-weight:400; text-wrap:balance; margin:0; line-height:1.38; letter-spacing:-.01em}
h4{font-family:"IBM Plex Sans KR",sans-serif; font-weight:700; text-wrap:balance; margin:0; line-height:1.45}
p{margin:0}
img{max-width:100%}
a{color:var(--sky-ink); text-underline-offset:3px}
:focus-visible{outline:3px solid var(--sky); outline-offset:2px; border-radius:8px}
.mono{font-family:"IBM Plex Mono",ui-monospace,monospace; font-variant-numeric:tabular-nums}
[hidden]{display:none !important}

.wrap{max-width:960px; margin:0 auto; padding-inline:18px}
.wrap.wide{max-width:1160px}

/* ── 상단 ─────────────────────────────────────────── */
header.top{
  border-bottom:3px solid var(--line);
  background:
    radial-gradient(circle at 12% 130%, var(--lemon-soft) 0 42%, transparent 42%),
    radial-gradient(circle at 88% -30%, var(--sky-soft) 0 38%, transparent 38%),
    linear-gradient(120deg, var(--brass-soft), var(--surface) 55%, var(--moss-soft));
}
.masthead{padding-block:22px 20px; display:flex; flex-wrap:wrap; gap:18px; align-items:flex-end; justify-content:space-between}
.eyebrow{font-size:12.5px; letter-spacing:.01em; color:var(--ink-2); font-weight:700}
h1{font-size:clamp(26px,5.6vw,40px); margin-top:6px}
.sub{color:var(--ink-2); font-size:14px; margin-top:8px; max-width:46ch}
.dday{background:var(--surface); border:3px solid var(--brass); border-radius:20px; padding:12px 18px; min-width:168px; box-shadow:var(--shadow-pop); transform:rotate(-1.2deg)}
.dday .num{font-family:"Jua",sans-serif; font-size:34px; letter-spacing:-.01em; color:var(--brass-strong); display:block; line-height:1.1}
.dday .lbl{font-size:12px; letter-spacing:.01em; color:var(--ink-2); font-weight:700}
.dday .fine{font-size:12px; color:var(--ink-2); margin-top:4px}

nav.tabs{position:sticky; top:0; z-index:20; background:color-mix(in srgb, var(--paper) 88%, transparent); backdrop-filter:blur(8px); border-bottom:2px solid var(--line)}
.tabrow{display:flex; gap:7px; overflow-x:auto; scrollbar-width:none; padding-block:10px}
.tabrow::-webkit-scrollbar{display:none}
.tab{appearance:none; background:var(--surface); border:2px solid var(--line); border-radius:999px; font:inherit; font-size:14.5px; font-weight:700; color:var(--ink-2); padding:9px 16px; white-space:nowrap; cursor:pointer; display:flex; gap:8px; align-items:center; transition:transform .14s, background .14s, border-color .14s}
.tab .n{font-family:"Jua",sans-serif; font-size:13px; color:var(--ink-3); background:var(--surface-2); border-radius:999px; width:23px; height:23px; display:grid; place-items:center; line-height:1}
.tab:hover{color:var(--ink); border-color:var(--brass); transform:translateY(-2px)}
.tab[aria-selected="true"]{color:var(--on); background:var(--brass-strong); border-color:var(--brass-strong); box-shadow:0 3px 0 rgba(42,36,64,.12)}
.tab[aria-selected="true"] .n{background:rgba(255,255,255,.28); color:var(--on)}

main{padding-block:28px 60px}
section.panel{display:none}
section.panel.on{display:block}
.stack{display:flex; flex-direction:column; gap:22px}

/* ── 블록 ─────────────────────────────────────────── */
.card{background:var(--surface); border:2px solid var(--line); border-radius:var(--r); padding:22px 24px; box-shadow:var(--shadow)}
.card.tight{padding:15px 18px}
h2{font-size:26px} h3{font-size:20px}
h4{font-size:15.5px; font-family:"IBM Plex Sans KR",sans-serif; font-weight:600}
.lede{color:var(--ink-2); font-size:15.5px}
.sec-head{display:flex; flex-direction:column; gap:7px; padding-bottom:4px}
.rule{height:1px; background:var(--line); border:0; margin:0}
.kicker{font-size:12px; letter-spacing:.06em; font-weight:700; color:var(--grape-ink); background:var(--grape-soft); border-radius:999px; padding:3px 11px; display:inline-block; width:fit-content; align-self:flex-start}
.field-label{display:block; font-size:14.5px; font-weight:700; color:var(--ink); margin-bottom:6px}
.hint{font-size:14px; color:var(--ink-3); line-height:1.65; margin-top:6px}

input[type=text],input[type=password],textarea,select{
  width:100%; font:inherit; font-size:15.5px; color:var(--ink);
  background:var(--paper); border:2px solid var(--line); border-radius:var(--r-sm);
  padding:11px 13px; resize:vertical;
}
input:focus,textarea:focus,select:focus{border-color:var(--sky); outline:none; box-shadow:0 0 0 4px var(--sky-soft)}
textarea{line-height:1.7; min-height:74px}

.btn{appearance:none; font:inherit; font-size:14.5px; font-weight:700; cursor:pointer;
  background:var(--ink); color:var(--on); border:2px solid var(--ink); padding:10px 18px;
  border-radius:999px; text-decoration:none; display:inline-block;
  box-shadow:0 3px 0 rgba(42,36,64,.16); transition:transform .12s, box-shadow .12s, background .12s}
.btn:hover{transform:translateY(-2px); box-shadow:0 5px 0 rgba(42,36,64,.16)}
.btn:active{transform:translateY(1px); box-shadow:0 1px 0 rgba(42,36,64,.16)}
.btn:disabled{opacity:.45; cursor:not-allowed; transform:none; box-shadow:none}
.btn.ghost{background:var(--surface); color:var(--ink); border-color:var(--line); box-shadow:0 2px 0 rgba(42,36,64,.07)}
.btn.ghost:hover{background:var(--surface-2); border-color:var(--brass)}
.btn.brass{background:var(--brass-strong); border-color:var(--brass-strong); color:var(--on)}
.btn.moss{background:var(--moss-strong); border-color:var(--moss-strong); color:var(--on)}
.btn.grape{background:var(--grape-strong); border-color:var(--grape-strong); color:var(--on)}
.btn.sm{font-size:13px; padding:6px 13px; box-shadow:0 2px 0 rgba(42,36,64,.1)}
.btnrow{display:flex; flex-wrap:wrap; gap:8px; align-items:center}

.note{border:2px solid var(--brass); background:var(--brass-soft); padding:14px 18px; border-radius:var(--r-sm); font-size:15px; color:var(--ink)}
.note.warn{border-color:var(--alert); background:var(--alert-soft)}
.note.moss{border-color:var(--moss); background:var(--moss-soft)}
.note.ok{border-color:var(--ok); background:var(--ok-soft)}

.pill{display:inline-flex; align-items:center; gap:6px; font-size:12.5px; font-weight:700; padding:4px 11px; border-radius:999px; border:2px solid var(--line); color:var(--ink-2); background:var(--surface-2); white-space:nowrap}
.pill.brass{color:var(--brass-ink); background:var(--brass-soft); border-color:transparent}
.pill.moss{color:var(--moss-ink); background:var(--moss-soft); border-color:transparent}
.pill.alert{color:var(--alert); background:var(--alert-soft); border-color:transparent}
.pill.ok{color:var(--ok); background:var(--ok-soft); border-color:transparent}

ul.tick,ol.num{margin:0; padding-left:1.15em; display:flex; flex-direction:column; gap:7px; font-size:14.5px; color:var(--ink-2)}
ul.tick{list-style:none; padding-left:0}
ul.tick li{padding-left:1.35em; position:relative}
ul.tick li::before{content:"★"; position:absolute; left:0; color:var(--lemon); font-size:12px}
ul.tick.moss li::before{content:"●"; color:var(--moss); font-size:9px}
ul.tick.x li::before{content:"×"; color:var(--alert)}
ol.num li::marker{font-family:"IBM Plex Mono",monospace; color:var(--ink-3); font-size:13px}

.grid2{display:grid; grid-template-columns:repeat(auto-fit,minmax(250px,1fr)); gap:16px}
.grid3{display:grid; grid-template-columns:repeat(auto-fit,minmax(190px,1fr)); gap:14px}

table{width:100%; border-collapse:collapse; font-size:14px}
.tbox{overflow-x:auto; border:2px solid var(--line); border-radius:var(--r-sm)}
th,td{text-align:left; padding:10px 13px; border-bottom:1px solid var(--line-2); vertical-align:top}
thead th{background:var(--surface-2); border-radius:0; font-size:12.5px; letter-spacing:.01em; color:var(--ink-2); font-weight:700; border-bottom:1px solid var(--line); position:sticky; top:0}
tbody tr:last-child td{border-bottom:0}

/* ── 진단 문항 ─────────────────────────────────────── */
.q{border:2px solid var(--line); border-radius:var(--r); padding:17px 19px; background:var(--surface)}
.q + .q{margin-top:11px}
.q .qt{font-size:15px; font-weight:600; margin-bottom:11px; display:flex; gap:9px}
.q .qt .qn{font-family:"Jua",sans-serif; font-size:14px; color:var(--on); background:var(--grape); border-radius:999px; width:27px; height:27px; display:grid; place-items:center; flex:none; line-height:1}
.opts{display:flex; flex-direction:column; gap:7px}
.opt{display:flex; gap:11px; align-items:flex-start; font-size:15px; cursor:pointer; padding:11px 14px; border:2px solid var(--line-2); border-radius:var(--r-sm); background:var(--paper); color:var(--ink-2); transition:transform .12s, border-color .12s, background .12s}
.opt:hover{border-color:var(--grape); transform:translateX(3px)}
.opt input{margin:4px 0 0; accent-color:var(--grape-strong); flex:none; width:18px; height:18px}
.opt:has(input:checked){border-color:var(--grape-strong); background:var(--grape-soft); color:var(--ink); font-weight:600}

.meter{height:30px; border-radius:999px; overflow:hidden; display:flex; border:2px solid var(--line); background:var(--surface-2)}
.meter .a{background:var(--brass)} .meter .b{background:var(--moss)}
.meter span{display:block; transition:width .45s cubic-bezier(.2,.7,.3,1)}
.meterlbl{display:flex; justify-content:space-between; font-size:14px; font-weight:700; margin-bottom:7px}
.meterlbl .l{color:var(--brass-ink)} .meterlbl .r{color:var(--moss-ink)}

/* ── 워크시트 ─────────────────────────────────────── */
.switch{display:inline-flex; border:2px solid var(--line); border-radius:999px; overflow:hidden; background:var(--surface); padding:3px; gap:3px}
.switch button{appearance:none; border:0; background:none; font:inherit; font-size:14.5px; font-weight:700; color:var(--ink-3); padding:8px 20px; cursor:pointer; border-radius:999px; transition:background .14s, color .14s}
.switch button:hover{background:var(--surface-2); color:var(--ink)}
.switch button[aria-pressed="true"]{background:var(--ink); color:var(--on)}
.step{border:2px solid var(--line); border-radius:var(--r); background:var(--surface); overflow:hidden; transition:border-color .2s}
.step + .step{margin-top:13px}
.step-h{display:flex; gap:12px; align-items:center; padding:16px 19px 0}
.step-h .sn{font-family:"Jua",sans-serif; font-size:15px; color:var(--on); background:var(--ink-3); border-radius:999px; width:31px; height:31px; display:grid; place-items:center; flex:none; line-height:1; transition:background .2s}
.step-b{padding:10px 19px 18px}

/* 한 칸을 채우면 번호가 초록 동그라미로 바뀌고 도장이 찍힙니다 */
.step.done{border-color:var(--moss)}
.step.done .step-h .sn{background:var(--moss-strong); font-size:0}
.step.done .step-h .sn::after{content:"✓"; font-size:17px; font-family:"IBM Plex Sans KR",sans-serif; font-weight:700}
.step.done .step-h h4::after{
  content:"다 썼어요"; margin-left:9px; font-size:11.5px; font-weight:700; vertical-align:middle;
  color:var(--moss-ink); background:var(--moss-soft); border:1.5px solid var(--moss);
  border-radius:999px; padding:2px 9px; display:inline-block; transform:rotate(-3deg);
  animation:stamp .32s cubic-bezier(.2,1.6,.4,1);
}
@keyframes stamp{ from{ transform:rotate(-3deg) scale(1.8); opacity:0 } to{ transform:rotate(-3deg) scale(1); opacity:1 } }
.counter{font-family:"IBM Plex Mono",monospace; font-size:13.5px; display:flex; gap:11px; align-items:center; margin-top:9px; flex-wrap:wrap}
.counter .v{font-family:"Jua",sans-serif; font-size:22px}
.counter.low .v,.counter.over .v{color:var(--alert)} .counter.good .v{color:var(--ok)}
.bar{height:12px; background:var(--surface-2); border-radius:99px; overflow:hidden; flex:1; min-width:110px; border:1.5px solid var(--line)}
.bar i{display:block; height:100%; background:var(--brass); transition:width .3s;
  background-image:linear-gradient(115deg, rgba(255,255,255,.42) 25%, transparent 25% 50%, rgba(255,255,255,.42) 50% 75%, transparent 75%);
  background-size:16px 16px; animation:flow 1s linear infinite}
@keyframes flow{ to{ background-position:16px 0 } }
.bar.good i{background:var(--ok)} .bar.over i{background:var(--alert)}

.cuts{display:grid; grid-template-columns:repeat(auto-fit,minmax(210px,1fr)); gap:11px}
.cut{border:2px solid var(--line); border-radius:var(--r-sm); background:var(--surface); padding:12px 13px; transition:transform .14s, border-color .14s}
.cut:focus-within{border-color:var(--moss); transform:translateY(-2px)}
.cut .cn{font-family:"Jua",sans-serif; font-size:13px; color:var(--on); background:var(--moss-strong); border-radius:999px; padding:2px 11px; display:inline-block; margin-bottom:8px}
.cut .beat{font-size:12.5px; color:var(--ink-3); margin-bottom:8px}
.cut textarea{min-height:72px; font-size:13.5px; background:var(--surface)}

.chk{display:flex; gap:12px; align-items:flex-start; font-size:15px; color:var(--ink-2); padding:11px 13px; border:2px solid transparent; border-radius:var(--r-sm); cursor:pointer; transition:background .14s}
.chk:hover{background:var(--surface-2)}
.chk input{margin:3px 0 0; accent-color:var(--moss-strong); flex:none; width:21px; height:21px; cursor:pointer}
.chk:has(input:checked){background:var(--ok-soft); border-color:var(--ok); color:var(--ink)}

/* ── 유사도 / 보드 ─────────────────────────────────── */
.bcard{border:2px solid var(--line); border-radius:var(--r); padding:13px 15px; background:var(--surface); display:flex; flex-direction:column; gap:6px; box-shadow:var(--shadow); transition:transform .14s}
.bcard:hover{transform:translateY(-3px)}
.bcard .who{font-size:13px; font-weight:600; display:flex; gap:7px; align-items:center; justify-content:space-between}
.bcard .kw{font-size:13.5px; color:var(--ink-2)}
.simrow{display:flex; gap:9px; align-items:center; font-size:13px; padding:8px 0; border-bottom:1px solid var(--line-2)}
.simrow:last-child{border-bottom:0}
.simrow .txt{color:var(--ink-3); overflow:hidden; text-overflow:ellipsis; white-space:nowrap}
.simbadge{font-family:"Jua",sans-serif; font-size:13px; padding:3px 10px; border-radius:999px; flex:none}
.s-hi{background:var(--alert-soft); color:var(--alert)}
.s-mid{background:var(--lemon-soft); color:var(--brass-ink)}
.s-lo{background:var(--surface-2); color:var(--ink-3)}

.codebox{font-family:"IBM Plex Mono",monospace; font-size:12px; word-break:break-all; background:var(--paper); border:1px solid var(--line); border-radius:7px; padding:10px 12px; color:var(--ink-2); max-height:140px; overflow:auto}

/* ── 로그인 ───────────────────────────────────────── */
.gate{min-height:100vh; display:grid; place-items:center; padding:24px 18px;
  background:
    radial-gradient(circle at 15% 12%, var(--lemon-soft) 0 26%, transparent 26%),
    radial-gradient(circle at 85% 88%, var(--sky-soft) 0 24%, transparent 24%),
    var(--paper);
}
.gatecard{width:100%; max-width:420px; background:var(--surface); border:3px solid var(--line); border-radius:24px; padding:32px 30px; box-shadow:var(--shadow-pop)}
.gatecard h1{font-size:29px; margin:0}
.gatecard .f{margin-top:16px}
.err{color:var(--alert); font-size:14px; font-weight:600; margin-top:10px; min-height:20px}

.userbar{display:flex; gap:10px; align-items:center; font-size:13px; color:var(--ink-2); flex-wrap:wrap}
.savedot{display:inline-flex; align-items:center; gap:7px; font-size:13px; font-weight:600; color:var(--ink-3); background:var(--surface); border:2px solid var(--line); border-radius:999px; padding:3px 12px}
.savedot::before{content:""; width:9px; height:9px; border-radius:99px; background:var(--ink-3)}
.savedot.saving::before{animation:blink .8s ease-in-out infinite}
@keyframes blink{ 50%{ opacity:.25 } }
.savedot.saving::before{background:var(--brass)}
.savedot.saved::before{background:var(--ok)}
.savedot.error::before{background:var(--alert)}

/* ── 업로드 ───────────────────────────────────────── */
.drop{border:3px dashed var(--line); border-radius:var(--r); padding:30px 20px; text-align:center; background:var(--paper); cursor:pointer; transition:transform .14s, border-color .14s, background .14s}
.drop:hover,.drop.over{border-color:var(--moss); background:var(--moss-soft); transform:scale(1.01)}
.filelist{display:flex; flex-direction:column; gap:8px; margin-top:12px}
.filerow{display:flex; gap:12px; align-items:center; border:2px solid var(--line); border-radius:var(--r-sm); padding:10px 13px; background:var(--surface)}
.filerow img{width:48px; height:48px; object-fit:cover; border-radius:9px; border:2px solid var(--line); flex:none}
.filerow .meta{flex:1; min-width:0}
.filerow .nm{font-size:13.5px; font-weight:600; overflow:hidden; text-overflow:ellipsis; white-space:nowrap}
.filerow .sz{font-size:12px; color:var(--ink-3); font-family:"IBM Plex Mono",monospace}

/* ── 교사 대시보드 ─────────────────────────────────── */
.statrow{display:grid; grid-template-columns:repeat(auto-fit,minmax(130px,1fr)); gap:12px}
.stat{background:var(--surface); border:2px solid var(--line); border-radius:var(--r); padding:14px 17px; box-shadow:var(--shadow)}
.stat .n{font-family:"Jua",sans-serif; font-size:30px; line-height:1.2}
.stat .l{font-size:12.5px; color:var(--ink-3); font-weight:700}
.prog{height:9px; background:var(--surface-2); border-radius:99px; overflow:hidden; min-width:58px; width:72px; border:1.5px solid var(--line)}
.prog i{display:block; height:100%; background:var(--moss); transition:width .3s}
tr.clickable{cursor:pointer}
tr.clickable:hover td{background:var(--surface-2)}
.drawer{position:fixed; inset:0; background:rgba(42,36,64,.5); z-index:50; display:flex; justify-content:flex-end}
.drawer .inner{width:min(640px,100%); background:var(--paper); overflow-y:auto; padding:26px 24px 60px; border-left:3px solid var(--line)}
.kv{display:grid; grid-template-columns:max-content 1fr; gap:6px 16px; font-size:14.5px}
.kv dt{color:var(--ink-3); font-size:13px; font-weight:700; padding-top:2px; white-space:nowrap}
.kv dd{margin:0; color:var(--ink); white-space:pre-wrap}

.toast{position:fixed; left:50%; bottom:26px; transform:translateX(-50%) translateY(20px) scale(.9); background:var(--ink); color:var(--on); font-size:15px; font-weight:700; padding:12px 22px; border-radius:999px; opacity:0; pointer-events:none; z-index:99; box-shadow:var(--shadow-pop); transition:.26s cubic-bezier(.2,1.5,.4,1)}
.toast.on{opacity:1; transform:translateX(-50%) translateY(0) scale(1)}

footer{border-top:2px solid var(--line); margin-top:10px; padding-block:22px 34px; color:var(--ink-3); font-size:13px}
.footrow{display:flex; flex-wrap:wrap; gap:14px; justify-content:space-between; align-items:center}

@media (prefers-reduced-motion:reduce){*{transition:none !important; animation:none !important}}
@media print{
  nav.tabs,.btnrow,footer,.dday,.userbar{display:none !important}
  section.panel{display:block !important; break-before:page}
  body{background:#fff; color:#000; font-size:11pt}
  .card,.step,.q{border-color:#999; break-inside:avoid}
  textarea{border:1px solid #bbb; min-height:auto; height:auto}
}

/* ── 꼭 읽어야 하는 안내 ───────────────────────────────────────── */
.mustread{border:3px solid var(--alert); background:var(--alert-soft); border-radius:var(--r);
  padding:16px 18px; margin-top:14px}
.mustread h4{font-size:16.5px; color:var(--alert); display:flex; gap:8px; align-items:center}
.mustread ul{margin:11px 0 0; padding:0; list-style:none; display:flex; flex-direction:column; gap:9px}
.mustread li{display:flex; gap:10px; align-items:flex-start; font-size:15.5px; line-height:1.6; color:var(--ink)}
.mustread li b{color:var(--alert)}
.mustread li .mk{flex:none; width:24px; height:24px; border-radius:999px; background:var(--alert);
  color:var(--on); font-size:14px; font-weight:700; display:grid; place-items:center; line-height:1}

/* ── 제출했을 때 터지는 색종이 ─────────────────────────────────── */
.confetti{position:fixed; inset:0; pointer-events:none; z-index:120; overflow:hidden}
.confetti i{position:absolute; top:-14px; width:11px; height:15px; border-radius:2px; animation:fall linear forwards}
@keyframes fall{
  from{ transform:translateY(-10vh) rotate(0deg); opacity:1 }
  to{ transform:translateY(108vh) rotate(760deg); opacity:.9 }
}

/* ── PIN 입력·PIN 변경 창 ─────────────────────────────────────── */
input.pin{letter-spacing:.55em; text-align:center; font-size:19px; padding-left:14px}
.gate.overlay{position:fixed; inset:0; z-index:80; background:var(--paper); overflow:auto}

/* ── 교사 화면 카드 보기 (패들렛처럼) ──────────────────────────── */
.board{display:grid; grid-template-columns:repeat(auto-fill,minmax(290px,1fr)); gap:15px}
.pcard{background:var(--surface); border:2px solid var(--line); border-radius:var(--r);
  box-shadow:var(--shadow); overflow:hidden; cursor:pointer; display:flex; flex-direction:column;
  transition:transform .14s, border-color .14s}
.pcard:hover{transform:translateY(-3px); border-color:var(--brass)}
.pcard .strip{height:7px; background:var(--brass)}
.pcard.c .strip{background:var(--moss)}
.pcard .body{padding:14px 16px 16px; display:flex; flex-direction:column; gap:9px; flex:1}
.pcard .top{display:flex; gap:8px; align-items:baseline; justify-content:space-between}
.pcard .nm{font-family:"Jua",sans-serif; font-size:19px; line-height:1.2}
.pcard .sch{font-size:12.5px; color:var(--ink-3)}
.pcard .line{display:flex; gap:8px; align-items:center; font-size:13px; color:var(--ink-2)}
.pcard .idea{font-size:14px; font-weight:700; color:var(--ink)}
.pcard .kw{font-size:13px; color:var(--ink-2)}
.pcard .peek{font-size:12.5px; color:var(--ink-2); background:var(--paper); border:1.5px solid var(--line-2);
  border-radius:var(--r-sm); padding:9px 11px; line-height:1.6; max-height:78px; overflow:hidden;
  white-space:pre-wrap; position:relative}
.pcard .peek.empty{color:var(--ink-3); font-style:italic}
/* 잘린 글이 뚝 끊겨 보이지 않게 아래를 흐리게 */
.pcard .peek:not(.empty)::after{content:""; position:absolute; left:0; right:0; bottom:0; height:22px;
  background:linear-gradient(transparent, var(--paper))}
.pcard .thumbs{display:flex; gap:6px; flex-wrap:wrap}
.pcard .thumbs img{width:52px; height:52px; object-fit:cover; border-radius:8px; border:2px solid var(--line)}
.pcard .foot{display:flex; gap:7px; align-items:center; flex-wrap:wrap; margin-top:auto; padding-top:4px}
.pcard .quiz{display:flex; height:9px; border-radius:99px; overflow:hidden; border:1.5px solid var(--line)}
.pcard .quiz i{display:block}
.pcard .quiz .a{background:var(--brass)} .pcard .quiz .b{background:var(--moss)}

/* 선생님 말씀 (학생 화면) */
.fbcard{border:3px solid var(--moss); background:var(--moss-soft); border-radius:var(--r);
  padding:16px 19px; margin-bottom:18px}
.fbcard .fbhead{display:flex; gap:9px; align-items:center; flex-wrap:wrap; margin-bottom:8px}
.fbcard .fbtext{white-space:pre-wrap; font-size:15.5px; color:var(--ink); line-height:1.75}

/* 컷 설명 — 평소엔 글씨처럼 보이다가 누르면 고칠 수 있는 칸이 됩니다 */
.cut .beat-in{width:100%; font:inherit; font-size:12.5px; color:var(--ink-3); background:transparent;
  border:1.5px dashed transparent; border-radius:8px; padding:3px 7px; margin-bottom:8px}
.cut .beat-in:hover{border-color:var(--line); background:var(--paper)}
.cut .beat-in:focus{border-style:solid; border-color:var(--moss); background:var(--surface);
  color:var(--ink); box-shadow:none}
.cut .beat-in::placeholder{color:var(--ink-3); opacity:1}

/* ── 피드백 목록 (댓글처럼 쌓임, 최신이 맨 위) ──────────────────── */
.fblist{display:flex; flex-direction:column; gap:9px}
.fbitem{background:var(--surface); border:2px solid var(--line); border-radius:var(--r-sm); padding:11px 13px}
.fbitem .fbmeta{display:flex; gap:8px; align-items:center; font-size:12.5px; color:var(--ink-3); margin-bottom:5px}
.fbitem .fbbody{white-space:pre-wrap; font-size:15px; line-height:1.7; color:var(--ink)}
/* 최신 것은 확실히 달라 보이게 */
.fbitem.newest{border-color:var(--moss); border-width:3px; background:var(--surface);
  box-shadow:var(--shadow-pop)}
.fbitem.newest .fbbody{font-size:16.5px; font-weight:600}
.fbitem:not(.newest){opacity:.82}
.fbitem:not(.newest) .fbbody{font-size:14.5px; color:var(--ink-2)}

/* ── 그림판 (컷 스케치 · 타임머신 그림) ────────────────────────── */
.sk{border:2px solid var(--line); border-radius:var(--r); background:var(--surface); padding:12px 13px}
.sk-head{display:flex; gap:9px; align-items:center; justify-content:space-between; flex-wrap:wrap; margin-bottom:9px}
.sk-head b{font-size:14.5px}
.sk-tools{display:flex; gap:6px; flex-wrap:wrap}

.sk-stage{position:relative; width:100%; aspect-ratio:4/3; border:2px dashed var(--line);
  border-radius:var(--r-sm); background:var(--paper) center/contain no-repeat; overflow:hidden;
  touch-action:none; --u:2px}
.sk-stage.readonly{border-style:solid; touch-action:auto}
.sk-stage.small{aspect-ratio:4/3; border-width:1.5px}
.sk-empty{position:absolute; inset:0; display:grid; place-items:center; color:var(--ink-3);
  font-size:13.5px; pointer-events:none}

.sk-item{position:absolute; display:grid; place-items:center; cursor:grab; user-select:none}
.sk-stage.readonly .sk-item{cursor:default}
.sk-item.on{outline:2.5px solid var(--sky); outline-offset:2px; border-radius:6px}
.sk-item:active{cursor:grabbing}
.sk-grip{position:absolute; right:-7px; bottom:-7px; width:15px; height:15px; border-radius:99px;
  background:var(--sky); border:2px solid var(--surface); cursor:nwse-resize; display:none}
.sk-item.on .sk-grip{display:block}
.sk-stage.readonly .sk-grip{display:none !important}

.sk-emoji{line-height:1; overflow:hidden}
.sk-text{font-family:"Jua",sans-serif; color:var(--ink); text-align:center; line-height:1.2;
  word-break:keep-all; overflow-wrap:anywhere; padding:0 2px; max-width:100%; max-height:100%;
  overflow:hidden}
.sk-rect,.sk-oval{width:100%; height:100%; border:2px solid var(--brass-strong);
  background:color-mix(in srgb, var(--brass-soft) 70%, transparent)}
.sk-oval{border-radius:50%}
.sk-arrow{color:var(--grape-strong); line-height:1; overflow:hidden}
.sk-bubble{width:100%; height:100%; position:relative; background:var(--surface);
  border:2px solid var(--ink); display:grid; place-items:center; padding:6%}
.sk-bubble span{line-height:1.25; text-align:center; word-break:keep-all; overflow-wrap:anywhere;
  max-height:100%; overflow:hidden}
.sk-bubble::after{content:""; position:absolute; left:16%; bottom:-9%;
  border-left:6% solid transparent; border-right:3% solid transparent;
  border-top:10% solid var(--ink)}

.sk-pal{display:flex; flex-direction:column; gap:7px; margin-top:10px}
.sk-grp{display:flex; gap:5px; align-items:center; flex-wrap:wrap}
.sk-grp-n{font-size:12px; font-weight:700; color:var(--ink-3); width:62px; flex:none}
.sk-chip{appearance:none; font:inherit; font-size:21px; line-height:1; cursor:pointer;
  background:var(--paper); border:2px solid var(--line); border-radius:10px; padding:4px 7px;
  transition:transform .12s, border-color .12s}
.sk-chip:hover{transform:translateY(-2px); border-color:var(--sky)}
.sk-chip.w{font-size:13px; font-weight:700; padding:7px 11px; color:var(--ink-2)}

/* 컷 카드 안에서 */
.cut .sk{border:0; padding:0; background:none; margin-bottom:9px}
.cut .sk-head b{font-size:13px}
.cut .sk-stage{aspect-ratio:4/3}
.cut .sk-pal{margin-top:8px}
.cut .sk-grp-n{width:auto; font-size:11px}
.cut .sk-chip{font-size:18px; padding:3px 6px}
.cut .sk-chip.w{font-size:12px; padding:5px 9px}

/* 컷 순서·크기 */
.cut-bar{display:flex; gap:5px; align-items:center; margin-bottom:8px; flex-wrap:wrap}
.cut-bar .btn{padding:3px 9px; font-size:12px; box-shadow:none}
.cut.wide{grid-column:span 2}
@media (max-width:640px){ .cut.wide{grid-column:auto} }

/* 초안 옆에 붙여 두는 타임머신 그림 */
.tmpin{border:2px solid var(--sky); background:var(--sky-soft); border-radius:var(--r);
  padding:11px 13px; margin-top:12px; max-width:340px}
.tmpin-h{display:flex; gap:9px; align-items:center; justify-content:space-between; margin-bottom:8px}
.tmpin-h b{font-size:13.5px; color:var(--sky-ink)}
.tmpin .sk-stage{border-color:var(--sky)}
@media (min-width:900px){
  .tmpin{position:sticky; top:76px; float:right; margin:0 0 12px 16px}
}
.pcard-art{border-radius:var(--r-sm); overflow:hidden}
.pcard-art .sk-stage{border-width:1.5px; background-color:var(--paper)}
.kv dd .sk-stage{max-width:220px; margin-bottom:6px}