:root{
  --bg:#f3f4f8;--card:#fff;--text:#1c1f26;--sub:#6b7180;--line:#e4e6ec;--pri:#3d6bff;--pri-weak:#e8eeff;
  --red:#e5484d;--orange:#f08c00;--yellow:#e8b400;--green:#18a058;--gray:#9aa0ab;
  --radius:16px;--tab-h:64px;--safe-b:env(safe-area-inset-bottom,0px);--safe-t:env(safe-area-inset-top,0px);
}
@media (prefers-color-scheme:dark){:root{
  --bg:#0f1115;--card:#1a1d24;--text:#eceef2;--sub:#9aa1ad;--line:#2a2e37;--pri:#6b8cff;--pri-weak:#232b45;
}}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Noto Sans JP",sans-serif;font-size:16px;line-height:1.5;overscroll-behavior-y:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none;padding:0}
#app{max-width:560px;margin:0 auto;padding:calc(var(--safe-t) + 8px) 14px calc(var(--tab-h) + var(--safe-b) + 90px)}

/* header */
.top{display:flex;align-items:center;justify-content:space-between;min-height:52px;margin-bottom:6px}
.top h1{font-size:26px;font-weight:800;margin:0;letter-spacing:.02em}
.icon-btn{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;font-size:22px;background:var(--card);box-shadow:0 1px 3px #0001}

/* tabs */
.tabs{position:fixed;left:0;right:0;bottom:0;z-index:20;display:flex;justify-content:space-around;background:color-mix(in srgb,var(--card) 92%,transparent);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-top:1px solid var(--line);padding-bottom:var(--safe-b)}
.tabs button{flex:1;height:var(--tab-h);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;font-size:11px;font-weight:600;color:var(--sub)}
.tabs button .ti{font-size:22px;line-height:1;filter:grayscale(1);opacity:.6}
.tabs button.on{color:var(--pri)}
.tabs button.on .ti{filter:none;opacity:1}

/* cards / sections */
.card{background:var(--card);border-radius:var(--radius);padding:14px 16px;margin-bottom:10px;box-shadow:0 1px 3px #0000000d}
.sec{display:flex;align-items:center;justify-content:space-between;margin:20px 4px 8px}
.sec h2{font-size:17px;margin:0;font-weight:800}
.sec .more{color:var(--pri);font-weight:700;font-size:14px;padding:8px 0 8px 12px}
.muted{color:var(--sub)}
.small{font-size:13px}
.empty{text-align:center;color:var(--sub);padding:26px 10px;font-size:14px}
.empty b{display:block;font-size:30px;margin-bottom:4px}

/* hero */
.hero{background:linear-gradient(135deg,#3d6bff,#7a5cff);color:#fff;border-radius:20px;padding:18px;margin-bottom:6px}
.hero .d{font-size:24px;font-weight:800}
.hero .t{opacity:.9;font-size:14px;margin-top:2px}
.hero .pills{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.hero .pill{background:#ffffff2e;border-radius:999px;padding:5px 12px;font-size:13px;font-weight:700}

/* class row */
.cls{display:flex;gap:12px;align-items:stretch}
.cls .per{min-width:46px;text-align:center;border-radius:12px;background:var(--pri-weak);color:var(--pri);display:flex;flex-direction:column;justify-content:center;padding:6px 0}
.cls .per b{font-size:18px;line-height:1.1}
.cls .per span{font-size:10px;font-weight:600}
.cls .body{flex:1;min-width:0}
.cls .name{font-weight:800;font-size:16px;line-height:1.3}
.cls .meta{font-size:13px;color:var(--sub);margin-top:2px}
.card.now{outline:2.5px solid var(--pri)}
.tag{display:inline-block;font-size:11px;font-weight:800;border-radius:6px;padding:1px 7px;margin-right:4px;vertical-align:2px}
.tag.now{background:var(--pri);color:#fff}
.tag.next{background:var(--pri-weak);color:var(--pri)}

/* attendance buttons */
.att{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;margin-top:10px}
.att.four{grid-template-columns:repeat(4,1fr);margin-top:0}
.att button{height:44px;border-radius:12px;background:var(--bg);font-weight:800;font-size:14px;color:var(--sub);border:1.5px solid transparent}
.att.four button{height:40px;font-size:13px}
.att button.on.present{background:#18a0581f;color:var(--green);border-color:var(--green)}
.att button.on.late{background:#f08c001f;color:var(--orange);border-color:var(--orange)}
.att button.on.absent{background:#e5484d1f;color:var(--red);border-color:var(--red)}
.att button.on.cancel{background:#9aa0ab2a;color:var(--sub);border-color:var(--gray)}

/* items (tasks/tests/messages) */
.item{display:flex;gap:12px;align-items:flex-start;position:relative;overflow:hidden;padding-left:20px}
.item::before{content:"";position:absolute;left:0;top:0;bottom:0;width:6px;background:var(--c,var(--line))}
.chk{flex:none;width:30px;height:30px;border-radius:50%;border:2.5px solid var(--line);display:grid;place-items:center;margin-top:1px;font-size:16px;color:#fff}
.chk.on{background:var(--green);border-color:var(--green)}
.item .body{flex:1;min-width:0}
.item .ttl{font-weight:800;line-height:1.35;word-break:break-word}
.item.done .ttl{text-decoration:line-through;color:var(--sub)}
.item .meta{font-size:13px;color:var(--sub);margin-top:3px;display:flex;flex-wrap:wrap;gap:4px 10px}
.item .hint{font-size:13px;font-weight:700;margin-top:6px}
.pr{flex:none;font-size:12px;font-weight:800;border-radius:8px;padding:3px 8px;white-space:nowrap}
.pr4{background:var(--red);color:#fff}.pr3{background:#e5484d1f;color:var(--red)}.pr2{background:#f08c001f;color:var(--orange)}.pr1{background:#e8b4001f;color:#b38a00}.pr0{background:#18a0581a;color:var(--green)}
.h4,.h3{color:var(--red)}.h2{color:var(--orange)}.h1{color:#b38a00}.h0{color:var(--green)}
.msg-body{white-space:pre-wrap;word-break:break-word;margin-top:6px;display:-webkit-box;-webkit-line-clamp:5;-webkit-box-orient:vertical;overflow:hidden}
.star{color:var(--orange)}

/* segmented */
.segbar{display:flex;background:var(--card);border-radius:14px;padding:4px;margin-bottom:12px;box-shadow:0 1px 3px #0000000d}
.segbar button{flex:1;height:42px;border-radius:10px;font-weight:800;color:var(--sub);font-size:15px}
.segbar button.on{background:var(--pri);color:#fff}
.segbar .n{font-size:12px;opacity:.8;margin-left:4px}

/* timetable */
.tt{display:grid;grid-template-columns:26px repeat(5,minmax(0,1fr));gap:4px}
.tt .hd{text-align:center;font-size:13px;font-weight:800;color:var(--sub);padding:4px 0}
.tt .hd.today{color:#fff;background:var(--pri);border-radius:8px}
.tt .pn{display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:14px;font-weight:800;color:var(--sub)}
.tt .pn small{font-size:8px;font-weight:600;line-height:1.1}
.tt .cell{min-height:92px;border-radius:10px;padding:5px 4px;font-size:11.5px;line-height:1.25;text-align:left;display:flex;flex-direction:column;overflow:hidden;word-break:break-all}
.tt .cell.empty{background:var(--card);opacity:.55;align-items:center;justify-content:center;color:var(--line);font-size:20px}
.tt .cell.c{background:color-mix(in srgb,var(--c) 16%,var(--card));border-left:4px solid var(--c)}
.tt .cell.c b{font-weight:800;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.tt .cell.c span{margin-top:auto;color:var(--sub);font-size:10.5px;padding-top:3px}
.tt .cell.cur{outline:2.5px solid var(--pri)}
.tt .cell.badge{position:relative}
.dot{position:absolute;top:4px;right:4px;width:8px;height:8px;border-radius:50%;background:var(--red)}

/* attendance overview */
.bar{height:10px;border-radius:99px;background:var(--bg);overflow:hidden;display:flex;margin:10px 0 6px}
.bar i{display:block;height:100%}
.stats{display:flex;gap:12px;flex-wrap:wrap;font-size:13px;color:var(--sub)}
.stats b{color:var(--text)}
.left{font-size:12px;font-weight:800;border-radius:8px;padding:3px 8px;white-space:nowrap}
.left.ok{background:#18a0581a;color:var(--green)}.left.warn{background:#f08c001f;color:var(--orange)}.left.ng{background:var(--red);color:#fff}
.row{display:flex;align-items:center;justify-content:space-between;gap:10px}
.banner{background:#f08c001a;color:var(--orange);font-weight:700;font-size:14px;border-radius:12px;padding:12px 14px;margin-bottom:10px}

/* FAB */
.fab{position:fixed;right:max(18px,calc(50% - 262px));bottom:calc(var(--tab-h) + var(--safe-b) + 16px);z-index:15;height:58px;padding:0 22px;border-radius:29px;background:var(--pri);color:#fff;font-weight:800;font-size:16px;box-shadow:0 6px 18px #3d6bff66;display:flex;align-items:center;gap:6px}
.fab b{font-size:26px;line-height:1;margin-top:-2px}

/* search */
.search{width:100%;height:46px;border-radius:14px;border:0;background:var(--card);padding:0 14px 0 40px;font-size:16px;margin-bottom:10px;box-shadow:0 1px 3px #0000000d;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' fill='none' stroke='%239aa0ab' stroke-width='2.4'%3E%3Ccircle cx='8' cy='8' r='6'/%3E%3Cpath d='m13 13 4 4'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:14px center}

/* sheet */
.backdrop{position:fixed;inset:0;background:#0007;z-index:40;opacity:0;transition:opacity .2s}
.backdrop.show{opacity:1}
.sheet{position:fixed;left:0;right:0;bottom:0;z-index:41;max-width:560px;margin:0 auto;max-height:92vh;max-height:92dvh;background:var(--bg);border-radius:22px 22px 0 0;display:flex;flex-direction:column;transform:translateY(100%);transition:transform .25s cubic-bezier(.2,.8,.2,1)}
.sheet.show{transform:none}
.sheet .sh{display:flex;align-items:center;gap:8px;padding:10px 12px 6px 18px;position:relative}
.sheet .sh::before{content:"";position:absolute;top:6px;left:50%;width:40px;height:5px;margin-left:-20px;border-radius:9px;background:var(--line)}
.sheet .sh h3{flex:1;margin:10px 0 0;font-size:19px;font-weight:800}
.sheet .sb{overflow-y:auto;padding:6px 16px 16px;-webkit-overflow-scrolling:touch}
.sheet .sf{display:flex;gap:10px;padding:10px 16px calc(10px + var(--safe-b));border-top:1px solid var(--line);background:var(--bg)}
.btn{height:52px;border-radius:14px;font-weight:800;font-size:16px;padding:0 18px;background:var(--card);flex:none}
.btn.p{background:var(--pri);color:#fff;flex:1}
.btn.d{color:var(--red)}
.btn.full{width:100%;margin-top:8px}

/* form */
.field{display:block;margin-bottom:14px}
.lbl{display:block;font-size:13px;font-weight:800;color:var(--sub);margin:0 0 6px 4px}
.inp{width:100%;min-height:50px;border-radius:12px;border:1.5px solid var(--line);background:var(--card);padding:12px 14px;font-size:16px;outline:none;-webkit-appearance:none;appearance:none}
.inp:focus{border-color:var(--pri)}
textarea.inp{min-height:110px;resize:vertical}
select.inp{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%239aa0ab' stroke-width='2' fill='none'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:36px}
.seg{display:flex;gap:6px;flex-wrap:wrap}
.seg label{flex:1;min-width:56px}
.seg input,.chips input,.swatch input,.slots input{position:absolute;opacity:0;pointer-events:none}
.seg span{display:flex;align-items:center;justify-content:center;height:46px;border-radius:12px;background:var(--card);border:1.5px solid var(--line);font-weight:800;font-size:14px;color:var(--sub)}
.seg input:checked+span{background:var(--pri);border-color:var(--pri);color:#fff}
.quick{display:flex;gap:6px;margin-top:8px;flex-wrap:wrap}
.quick button{height:38px;padding:0 14px;border-radius:10px;background:var(--pri-weak);color:var(--pri);font-weight:800;font-size:13px}
.swatch{display:flex;gap:10px;flex-wrap:wrap}
.swatch span{display:block;width:38px;height:38px;border-radius:50%;background:var(--c);border:3px solid transparent;box-shadow:0 0 0 1px var(--line)}
.swatch input:checked+span{border-color:var(--card);box-shadow:0 0 0 3px var(--c)}
.slots{display:grid;grid-template-columns:24px repeat(5,minmax(0,1fr));gap:4px;font-size:12px;text-align:center;font-weight:700;color:var(--sub)}
.slots span{display:flex;align-items:center;justify-content:center;height:36px;border-radius:8px;background:var(--card);border:1.5px solid var(--line)}
.slots input:checked+span{background:var(--pri);border-color:var(--pri);color:#fff}
.check{display:flex;align-items:center;gap:10px;min-height:48px;font-weight:700}
.check input{width:24px;height:24px;accent-color:var(--pri)}

/* detail */
.dhead{border-radius:16px;padding:16px;color:#fff;background:var(--c);margin-bottom:10px}
.dhead .n{font-size:21px;font-weight:800;line-height:1.3}
.dhead .m{font-size:13px;opacity:.92;margin-top:6px;line-height:1.6}
.actions{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;margin-bottom:6px}
.actions button{background:var(--card);border-radius:14px;height:64px;font-size:12px;font-weight:800;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px}
.actions button i{font-style:normal;font-size:22px}
.sess{display:flex;align-items:center;gap:10px;padding:8px 0;border-top:1px solid var(--line)}
.sess:first-child{border-top:0}
.sess .sd{width:78px;flex:none;font-size:13px;font-weight:700;line-height:1.3}
.sess .sd small{display:block;color:var(--sub);font-weight:600}
.sess .att{flex:1}
.sess.future{opacity:.45}
.sess.today .sd{color:var(--pri)}

.toast{position:fixed;left:50%;bottom:calc(var(--tab-h) + var(--safe-b) + 90px);transform:translateX(-50%) translateY(20px);background:#1c1f26;color:#fff;padding:12px 18px;border-radius:12px;font-weight:700;font-size:14px;opacity:0;transition:.2s;z-index:60;pointer-events:none;white-space:nowrap}
.toast.show{opacity:1;transform:translateX(-50%)}
.fab[hidden]{display:none}