*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font-body);font-size:16px;line-height:1.55;
  background-image:radial-gradient(rgba(29,27,46,.07) 1.2px,transparent 1.2px);background-size:22px 22px}
body.exam-open{overflow:hidden}
h1,h2,h3,h4{font-family:var(--font-display);line-height:1.15;margin:0 0 .4em}
h1{font-size:clamp(2.2rem,5.5vw,3.9rem);font-weight:800}
h2{font-size:clamp(1.6rem,3.4vw,2.4rem);font-weight:800}
h3{font-size:1.3rem;font-weight:700}
a{color:inherit}
img{max-width:100%}
.jp{font-family:var(--font-jp)}
[hidden]{display:none!important}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
.muted{color:var(--muted)}
.center{text-align:center}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:.5rem;font:600 1rem var(--font-body);padding:.7rem 1.2rem;border:var(--border);border-radius:999px;
  background:var(--card);color:var(--ink);cursor:pointer;box-shadow:var(--shadow-sm);text-decoration:none;transition:transform .12s,box-shadow .12s}
.btn:hover{transform:translate(-2px,-2px);box-shadow:5px 5px 0 var(--ink)}
.btn:active{transform:translate(2px,2px);box-shadow:0 0 0 var(--ink)}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:var(--shadow-sm)}
.btn-red{background:var(--red);color:#fff}
.btn-sun{background:var(--sun)}
.btn-ink{background:var(--ink);color:#fff}
.btn-ghost{background:transparent;box-shadow:none}
.btn-sm{padding:.4rem .9rem;font-size:.9rem}
.btn-lg{padding:.9rem 1.6rem;font-size:1.1rem}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:50;background:var(--paper);border-bottom:var(--border)}
.nav .wrap{display:flex;align-items:center;gap:18px;height:68px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-family:var(--font-display);font-weight:800;font-size:1.25rem}
.brand img{width:40px;height:40px}
.brand small{display:block;font:500 .7rem var(--font-body);color:var(--muted);margin-top:-4px;letter-spacing:.04em}
.nav-links{display:flex;gap:6px;margin-left:auto;align-items:center}
.nav-links a.l{padding:.4rem .8rem;border-radius:999px;text-decoration:none;font-weight:600;font-size:.95rem;cursor:pointer}
.nav-links a.l:hover{background:var(--paper-2)}
@media(max-width:720px){.nav-links a.l{display:none}}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding:64px 0 72px}
.hero .wrap{display:grid;grid-template-columns:1.25fr .75fr;gap:30px;align-items:center;position:relative;z-index:2}
.hero h1 em{font-style:normal;background:var(--sun);padding:0 .25em;border:var(--border);border-radius:14px;display:inline-block;transform:rotate(-2deg);box-shadow:var(--shadow-sm)}
.hero p.lead{font-size:1.15rem;max-width:34em;color:#3b3852}
.hero .cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:22px}
.pill{display:inline-block;background:var(--card);border:var(--border);border-radius:999px;padding:.25rem .8rem;font-weight:600;font-size:.85rem;box-shadow:var(--shadow-sm);margin-bottom:16px}
.mascot{width:min(320px,70%);margin:0 auto;display:block;animation:bob 3.2s ease-in-out infinite}
.float{position:absolute;font-family:var(--font-jp);font-weight:900;opacity:.16;color:var(--ink);user-select:none;pointer-events:none;animation:drift 9s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translateY(0) rotate(-2deg)}50%{transform:translateY(-14px) rotate(2deg)}}
@keyframes drift{0%,100%{transform:translateY(0) rotate(-6deg)}50%{transform:translateY(-22px) rotate(6deg)}}
@media(max-width:820px){.hero .wrap{grid-template-columns:1fr}.mascot{width:200px}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* ---------- sections ---------- */
section.block{padding:56px 0}
section.block.alt{background:var(--paper-2);border-top:var(--border);border-bottom:var(--border)}
.sec-head{margin-bottom:26px}
.sec-head p{color:var(--muted);margin:0}
.tabs{display:flex;gap:10px;flex-wrap:wrap;margin:0 0 24px}
.tab{font:700 1rem var(--font-display);padding:.5rem 1.3rem;border:var(--border);border-radius:999px;background:var(--card);cursor:pointer;box-shadow:var(--shadow-sm)}
.tab.on{background:var(--ink);color:#fff}

/* ---------- paper cards ---------- */
.grid{display:grid;gap:22px;grid-template-columns:repeat(auto-fill,minmax(250px,1fr))}
.paper{position:relative;background:var(--card);border:var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.paper.tilt-l{transform:rotate(-1.2deg)}.paper.tilt-r{transform:rotate(1.2deg)}
.paper.click{cursor:pointer;transition:transform .15s,box-shadow .15s}
.paper.click:hover{transform:translate(-3px,-3px) rotate(0);box-shadow:8px 8px 0 var(--ink)}
.paper .tape{position:absolute;top:-13px;left:50%;width:84px;height:24px;margin-left:-42px;border:var(--border);border-radius:4px;transform:rotate(-3deg);opacity:.95}
.paper .ico{font-size:2.2rem;line-height:1}
.paper .count{display:inline-block;margin-top:10px;font-weight:700;font-size:.85rem;background:var(--paper-2);border:2px solid var(--ink);border-radius:999px;padding:.1rem .7rem}
.chip{display:inline-block;font-weight:700;font-size:.78rem;padding:.12rem .65rem;border:2px solid var(--ink);border-radius:999px;background:var(--paper-2);margin-right:6px}
.chip.red{background:var(--red);color:#fff}.chip.sun{background:var(--sun)}.chip.teal{background:var(--teal)}.chip.ok{background:var(--leaf)}
.steps{counter-reset:s}
.steps .paper::before{counter-increment:s;content:counter(s);position:absolute;top:-16px;left:18px;width:36px;height:36px;border-radius:50%;background:var(--red);color:#fff;border:var(--border);display:grid;place-items:center;font:800 1.1rem var(--font-display)}
.empty{padding:34px;text-align:center;border:var(--border);border-style:dashed;border-radius:var(--radius);background:var(--card)}

/* ---------- forms ---------- */
label.f{display:block;font-weight:600;font-size:.9rem;margin-bottom:12px}
label.f span.req{color:var(--red)}
input[type=text],input[type=email],input[type=password],input[type=month],input[type=tel],input[type=search],select,textarea{width:100%;margin-top:5px;padding:.65rem .8rem;font:500 1rem var(--font-body);color:var(--ink);background:#fff;border:var(--border);border-radius:var(--radius-sm)}
input:focus,select:focus,textarea:focus{outline:3px solid var(--sun);outline-offset:1px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:0 14px}
@media(max-width:560px){.row2{grid-template-columns:1fr}}
.check{display:flex;gap:10px;align-items:flex-start;font-size:.9rem;margin:6px 0 14px}
.check input{width:20px;height:20px;margin-top:3px;accent-color:var(--red)}
.err{color:var(--bad);font-weight:600;font-size:.9rem;min-height:1.2em}

/* ---------- modal & toast ---------- */
.modal-bg{position:fixed;inset:0;z-index:1000;background:rgba(29,27,46,.55);display:grid;place-items:center;padding:16px;overflow:auto}
.modal{background:var(--paper);border:var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;width:min(560px,100%);max-height:94vh;overflow:auto}
.modal.wide{width:min(980px,100%)}
.modal-actions{display:flex;gap:12px;justify-content:flex-end;margin-top:18px;flex-wrap:wrap}
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);z-index:2000;background:var(--ink);color:#fff;padding:.7rem 1.2rem;border-radius:999px;font-weight:600;box-shadow:var(--shadow-sm);max-width:90vw}
.spinner{width:42px;height:42px;border-radius:50%;border:5px solid var(--paper-2);border-top-color:var(--red);animation:spin 1s linear infinite;margin:0 auto 12px}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- footer ---------- */
.foot{background:var(--ink);color:#fff;padding:36px 0;margin-top:0}
.foot a{color:var(--sun)}
.foot .wrap{display:flex;gap:24px;flex-wrap:wrap;justify-content:space-between;align-items:center}

/* =====================  EXAM (full screen)  ===================== */
#exam-root{display:none}
#exam-root.on{display:block;position:fixed;inset:0;z-index:500;background:var(--paper);overflow:auto}
.ex-load,.ex-fail{min-height:100vh;display:grid;place-content:center;text-align:center;padding:20px}
.ex{display:flex;flex-direction:column;height:100vh}
.ex-top{display:flex;align-items:center;gap:16px;padding:10px 18px;background:var(--ink);color:#fff;border-bottom:var(--border)}
.ex-brand{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:700;min-width:0}
.ex-brand img{width:34px;height:34px;flex:none}
.ex-brand span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:34vw}
.ex-mid{margin:0 auto}
.ex-sec{display:flex;align-items:center;gap:8px;font-weight:600;font-size:.9rem}
.ex-sec select{margin:0;padding:.35rem .6rem;border-radius:10px;min-width:180px;max-width:42vw}
.ex-right{display:flex;align-items:center;gap:14px}
.ex-timer{font:700 1.25rem var(--font-display);background:var(--sun);color:var(--ink);padding:.2rem .9rem;border-radius:999px;border:2px solid #fff;min-width:96px;text-align:center}
.ex-timer.low{background:var(--red);color:#fff;animation:pulse 1s infinite}
@keyframes pulse{50%{transform:scale(1.06)}}
.ex-main{flex:1;min-height:0;display:grid;grid-template-columns:1.15fr 1fr 230px;gap:18px;padding:18px;overflow:hidden}
.ex-q,.ex-a,.ex-pal{overflow:auto;min-height:0}
.ex-q{padding:22px}
.q-meta{font-weight:700;font-size:.82rem;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:10px}
.q-ins{font-size:.9rem;background:var(--paper-2);border:2px dashed var(--ink);border-radius:10px;padding:.5rem .8rem;margin-bottom:14px}
.q-passage{font-family:var(--font-jp);font-size:1.15rem;line-height:2;background:#fffdf6;border:2px solid var(--ink);border-radius:12px;padding:14px 16px;margin-bottom:16px}
.q-text{font-family:var(--font-jp);font-size:1.45rem;font-weight:500;line-height:1.8}
.q-text u{text-decoration-thickness:2px;text-underline-offset:5px}
.q-img{max-width:100%;border:2px solid var(--ink);border-radius:12px;margin-bottom:14px}
.audio{background:var(--paper-2);border:2px solid var(--ink);border-radius:12px;padding:10px 12px;margin-bottom:14px}
.audio audio{width:100%}
.audio iframe{width:100%;height:70px;border:0}
.audio small{display:block;margin-top:6px;color:var(--muted)}
.ex-a{display:flex;flex-direction:column;gap:12px;padding:4px}
.opt{display:flex;gap:14px;align-items:center;text-align:left;padding:14px 16px;border:var(--border);border-radius:var(--radius-sm);background:var(--card);cursor:pointer;font:500 1.2rem var(--font-jp);box-shadow:var(--shadow-sm);transition:transform .1s}
.opt:hover{transform:translate(-2px,-2px)}
.opt-n{flex:none;width:34px;height:34px;border-radius:50%;border:2px solid var(--ink);display:grid;place-items:center;font:700 1rem var(--font-display);background:var(--paper-2)}
.opt.sel{background:var(--sun)}
.opt.sel .opt-n{background:var(--ink);color:#fff}
.opt.right{background:#c9f5df;border-color:var(--ok)}.opt.right .opt-n{background:var(--ok);color:#fff;border-color:var(--ok)}
.opt.wrong{background:#ffd9dc;border-color:var(--bad)}.opt.wrong .opt-n{background:var(--bad);color:#fff;border-color:var(--bad)}
.opt:disabled{cursor:default;transform:none}
.fb{border:var(--border);border-radius:var(--radius-sm);padding:12px 14px;background:var(--card);font-size:.95rem}
.fb.ok{background:#c9f5df}.fb.no{background:#ffd9dc}
.ex-pal{background:var(--card);border:var(--border);border-radius:var(--radius);padding:14px;box-shadow:var(--shadow-sm)}
.ex-pal h4{font-size:.95rem;margin:10px 0 6px}
.ex-pal h4:first-child{margin-top:0}
.pal{display:grid;grid-template-columns:repeat(5,1fr);gap:6px}
.pal button{aspect-ratio:1;border:2px solid var(--ink);border-radius:8px;background:#fff;font:700 .85rem var(--font-body);cursor:pointer;position:relative;padding:0}
.pal button.done{background:var(--leaf)}
.pal button.flag::after{content:'';position:absolute;top:-5px;right:-5px;width:12px;height:12px;border-radius:50%;background:var(--red);border:2px solid var(--ink)}
.pal button.cur{outline:3px solid var(--sun);outline-offset:1px;background:var(--sun)}
.legend{display:flex;gap:10px;flex-wrap:wrap;font-size:.72rem;color:var(--muted);margin-top:12px}
.legend i{display:inline-block;width:12px;height:12px;border:2px solid var(--ink);border-radius:4px;margin-right:4px;vertical-align:-2px}
.ex-foot{display:flex;gap:12px;align-items:center;justify-content:center;padding:12px 18px;border-top:var(--border);background:var(--paper-2);flex-wrap:wrap}
.fs-banner{position:fixed;inset:0;z-index:700;background:rgba(29,27,46,.88);display:grid;place-content:center;text-align:center;color:#fff;gap:14px;padding:20px}
@media(max-width:980px){
  .ex{height:auto;min-height:100vh}
  .ex-top{flex-wrap:wrap;gap:8px}
  .ex-mid{order:3;width:100%;margin:0}
  .ex-sec{width:100%}.ex-sec select{max-width:none;flex:1}
  .ex-main{grid-template-columns:1fr;overflow:visible}
  .ex-q,.ex-a,.ex-pal{overflow:visible}
  .q-text{font-size:1.25rem}
  .ex-foot{position:sticky;bottom:0}
}

/* ---------- result ---------- */
.res{max-width:980px;margin:0 auto;padding:26px 18px 60px}
.score-ring{width:170px;height:170px;border-radius:50%;border:var(--border);display:grid;place-content:center;text-align:center;font-family:var(--font-display);background:conic-gradient(var(--leaf) calc(var(--p)*1%),var(--paper-2) 0);position:relative;box-shadow:var(--shadow)}
.score-ring::before{content:'';position:absolute;inset:14px;border-radius:50%;background:var(--paper);border:var(--border)}
.score-ring b{position:relative;font-size:2.4rem;line-height:1}.score-ring span{position:relative;font-size:.85rem;color:var(--muted)}
.res-top{display:flex;gap:26px;align-items:center;flex-wrap:wrap;margin-bottom:24px}
table.t{width:100%;border-collapse:collapse;background:var(--card);border:var(--border);border-radius:var(--radius-sm);overflow:hidden;font-size:.92rem}
table.t th,table.t td{padding:.55rem .75rem;text-align:left;border-bottom:2px solid var(--paper-2);vertical-align:top}
table.t th{background:var(--ink);color:#fff;font-weight:600;white-space:nowrap}
table.t tr:hover td{background:#fffdf6}
.review-q{background:var(--card);border:var(--border);border-radius:var(--radius);padding:16px 18px;margin-bottom:16px;box-shadow:var(--shadow-sm)}
.review-q .opt{font-size:1.05rem;padding:8px 12px;box-shadow:none;cursor:default;margin-top:8px}
.review-q .opt:hover{transform:none}
.review-q .q-text{font-size:1.2rem}

/* ---------- admin ---------- */
.adm{display:grid;grid-template-columns:220px 1fr;gap:22px;max-width:1280px;margin:0 auto;padding:22px 18px 60px}
.adm-side{position:sticky;top:90px;align-self:start;display:flex;flex-direction:column;gap:8px}
.adm-side button{text-align:left;font:600 1rem var(--font-body);padding:.6rem .9rem;border:var(--border);border-radius:var(--radius-sm);background:var(--card);cursor:pointer}
.adm-side button.on{background:var(--sun);box-shadow:var(--shadow-sm)}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:16px;margin-bottom:22px}
.stat{background:var(--card);border:var(--border);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow-sm)}
.stat b{display:block;font:800 2rem var(--font-display)}
.stat span{color:var(--muted);font-size:.85rem;font-weight:600}
.bars{display:flex;gap:6px;align-items:flex-end;height:120px;padding-top:8px}
.bars div{flex:1;background:var(--red);border:2px solid var(--ink);border-radius:6px 6px 0 0;min-height:3px;position:relative}
.bars div span{position:absolute;bottom:-20px;left:50%;transform:translateX(-50%);font-size:.65rem;color:var(--muted);white-space:nowrap}
.bars div em{position:absolute;top:-18px;left:50%;transform:translateX(-50%);font-size:.7rem;font-style:normal;font-weight:700}
.tbl-wrap{overflow:auto;border-radius:var(--radius-sm)}
.toolbar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:14px;align-items:end}
.toolbar label{font-size:.8rem;font-weight:600;margin:0}
.toolbar select,.toolbar input{margin-top:3px;padding:.45rem .6rem;font-size:.9rem}
.drop{border:3px dashed var(--ink);border-radius:var(--radius);padding:26px;text-align:center;background:var(--card);cursor:pointer}
.drop.over{background:var(--sun)}
.msg-list{margin:8px 0;padding-left:1.2rem;font-size:.9rem}
.msg-list.bad li{color:var(--bad)}.msg-list.warn li{color:#a86a00}
.up-item{background:var(--card);border:var(--border);border-radius:var(--radius-sm);padding:12px 14px;margin-top:12px}
code{background:var(--paper-2);padding:.05rem .35rem;border-radius:5px;font-size:.88em}
@media(max-width:820px){.adm{grid-template-columns:1fr}.adm-side{position:static;flex-direction:row;flex-wrap:wrap}}