:root{
  --paper:#FBFAF7; --ink:#1B2430; --green:#2F5D50; --green-soft:#E3ECE8;
  --honey:#C8922E; --honey-soft:#FBF1DC; --slate:#6B7280; --line:#E4E1D8; --white:#fff;
  --r:10px;
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--paper);color:var(--ink);font-family:"Source Sans 3",system-ui,sans-serif;font-size:17px;line-height:1.5}
h1,h2,h3{font-family:Fraunces,Georgia,serif;font-weight:600;margin:0;letter-spacing:-.01em}
h1{font-size:2rem} h2{font-size:1.45rem} h3{font-size:1.1rem}
button{font:inherit;cursor:pointer}
input,textarea,select{font:inherit;padding:.55rem .7rem;border:1px solid var(--line);border-radius:8px;background:var(--white);width:100%;color:var(--ink)}
input:focus,textarea:focus,select:focus,button:focus-visible,a:focus-visible{outline:2px solid var(--honey);outline-offset:2px}
.btn{border:1px solid var(--green);background:var(--green);color:#fff;padding:.55rem 1rem;border-radius:8px;font-weight:600}
.btn.ghost{background:transparent;color:var(--green)}
.btn.small{padding:.3rem .7rem;font-size:.9rem}
.btn.danger{border-color:#B4452B;background:transparent;color:#B4452B}
.muted{color:var(--slate);font-size:.92rem}
.eyebrow{font-size:.75rem;text-transform:uppercase;letter-spacing:.12em;color:var(--slate);font-weight:700}
.card{background:var(--white);border:1px solid var(--line);border-radius:var(--r);padding:1.1rem 1.25rem}
.stack>*+*{margin-top:.9rem}
.row{display:flex;gap:.75rem;align-items:center;flex-wrap:wrap}
.grow{flex:1}
.tag{display:inline-block;font-size:.75rem;font-weight:700;padding:.1rem .5rem;border-radius:999px;background:var(--green-soft);color:var(--green)}
.tag.honey{background:var(--honey-soft);color:#8A5F12}
.tag.slate{background:#EEF0F3;color:var(--slate)}
.pending{background:var(--honey-soft);border:1.5px dashed var(--honey);border-radius:var(--r);padding:1rem 1.25rem;position:relative;margin-top:1.1rem}
.pending::before{content:attr(data-label);position:absolute;top:-.7rem;left:1rem;background:var(--paper);padding:0 .4rem;font-size:.72rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:#8A5F12}
.pending label.approve{display:flex;gap:.5rem;align-items:center;font-weight:600;color:#8A5F12;margin-top:.6rem}
.pending input[type=checkbox]{width:1.15rem;height:1.15rem;accent-color:var(--green)}
.notice{background:var(--honey-soft);border-left:4px solid var(--honey);border-radius:8px;padding:.8rem 1rem;margin-bottom:1.25rem;font-size:.95rem}
.diff{margin-top:.5rem;font-size:.95rem}
.diff .was{color:var(--slate);text-decoration:line-through;padding:.25rem .5rem;border-left:3px solid var(--line)}
.diff .now{padding:.25rem .5rem;border-left:3px solid var(--honey);font-weight:600}
#app{min-height:100vh}
.shell{display:grid;grid-template-columns:250px 1fr;min-height:100vh}
aside{background:var(--green);color:#fff;padding:1.5rem 1.2rem;display:flex;flex-direction:column;gap:1.4rem}
aside .brand{font-family:Fraunces,serif;font-size:1.35rem;font-weight:600}
aside .class{font-size:.85rem;opacity:.8}
aside nav a{display:flex;justify-content:space-between;align-items:center;color:#fff;text-decoration:none;padding:.55rem .7rem;border-radius:8px;opacity:.85}
aside nav a.on,aside nav a:hover{background:rgba(255,255,255,.14);opacity:1}
aside nav .count{background:var(--honey);color:#1B2430;font-size:.72rem;font-weight:700;padding:0 .45rem;border-radius:999px}
aside .foot{margin-top:auto;font-size:.85rem;opacity:.9}
aside select{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.3)}
aside option{color:var(--ink)}
main{padding:2rem 2.5rem;max-width:1000px}
.page-head{display:flex;justify-content:space-between;align-items:end;gap:1rem;margin-bottom:1.5rem;padding-bottom:1rem;border-bottom:1px solid var(--line)}
.two{display:grid;grid-template-columns:1.6fr 1fr;gap:1.25rem}
.auth{min-height:100vh;display:grid;place-items:center;padding:2rem}
.auth .card{width:min(540px,100%);padding:2rem}
.auth .grid{display:grid;grid-template-columns:1fr 1fr;gap:.7rem}
.auth .grid .full{grid-column:1/-1}
.tabs{display:flex;gap:.3rem;margin-bottom:1.25rem}
.tabs button{border:none;background:none;padding:.4rem .8rem;border-radius:8px;color:var(--slate);font-weight:600}
.tabs button.on{background:var(--green-soft);color:var(--green)}
.cal{display:grid;grid-template-columns:repeat(7,1fr);gap:4px}
.cal .dow{font-size:.75rem;font-weight:700;color:var(--slate);text-align:center;padding:.3rem 0;text-transform:uppercase;letter-spacing:.08em}
.cal .day{min-height:92px;background:var(--white);border:1px solid var(--line);border-radius:8px;padding:.35rem .45rem;font-size:.8rem}
.cal .day.blank{background:transparent;border-color:transparent}
.cal .day b{display:block;margin-bottom:.2rem;color:var(--slate)}
.ev{display:block;padding:.1rem .35rem;border-radius:5px;margin-bottom:2px;text-decoration:none;color:inherit;font-weight:600;line-height:1.3;cursor:pointer;border:none;width:100%;text-align:left;font-size:.78rem}
.ev.event{background:var(--green-soft);color:var(--green)}
.ev.lesson{background:#E8E5F5;color:#4A3F8E}
.ev.bday{background:var(--honey-soft);color:#8A5F12}
details summary{cursor:pointer;font-weight:600;padding:.4rem 0}
.post{border-top:1px solid var(--line);padding:.9rem 0}
.post .who{font-weight:700}
.hidden-post{opacity:.5}
table{width:100%;border-collapse:collapse}
th,td{text-align:left;padding:.6rem .5rem;border-bottom:1px solid var(--line);vertical-align:middle}
th{font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;color:var(--slate)}
td input[type=checkbox]{width:1.1rem;height:1.1rem;accent-color:var(--green)}
.survey .bar{height:8px;background:var(--green-soft);border-radius:4px;overflow:hidden;margin:.2rem 0 .6rem}
.survey .bar i{display:block;height:100%;background:var(--green)}
.toast{position:fixed;bottom:1.5rem;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;padding:.6rem 1rem;border-radius:8px;font-weight:600;opacity:0;transition:opacity .2s;pointer-events:none;z-index:9}
.toast.show{opacity:1}
.seg{display:inline-flex;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--white)}
.seg button{border:none;background:none;padding:.45rem .8rem;color:var(--slate);font-weight:600}
.seg button.on{background:var(--green);color:#fff}
@media (max-width:800px){.shell{grid-template-columns:1fr}aside{flex-direction:row;flex-wrap:wrap;align-items:center}aside .foot{margin-top:0;width:100%}aside nav{display:flex;flex-wrap:wrap;gap:.2rem}main{padding:1.2rem}.two{grid-template-columns:1fr}.cal .day{min-height:60px}}
@media (prefers-reduced-motion:reduce){.toast{transition:none}}

/* --- app additions --- */
.field{display:block;margin-bottom:.7rem}
.field>span{display:block;font-size:.85rem;font-weight:600;color:var(--slate);margin-bottom:.2rem}
.err{background:#FBE7E2;border-left:4px solid #B4452B;border-radius:8px;padding:.6rem .9rem;margin:.6rem 0;font-size:.95rem}
.ok{background:var(--green-soft);border-left:4px solid var(--green);border-radius:8px;padding:.6rem .9rem;margin:.6rem 0;font-size:.95rem}
.empty{color:var(--slate);padding:1rem;text-align:center;border:1px dashed var(--line);border-radius:var(--r)}
.picker{min-height:100vh;display:grid;place-items:center;padding:2rem}
.picker .card{width:min(560px,100%)}
.picker a.cls{display:block;padding:.9rem 1rem;border:1px solid var(--line);border-radius:8px;text-decoration:none;color:inherit;margin-top:.6rem}
.picker a.cls:hover{border-color:var(--green)}
.linkish{background:none;border:none;color:var(--green);font-weight:600;padding:0;text-decoration:underline}
.lesson-body{white-space:pre-wrap}
.lesson-body img{max-width:100%}
.cal .day.today{border-color:var(--honey);box-shadow:inset 0 0 0 1px var(--honey)}
.monthnav{display:flex;gap:.5rem;align-items:center}
aside nav a.sub{padding-left:1.4rem;font-size:.9rem}
.check{display:flex;gap:.5rem;align-items:center}
.check input{width:1.1rem;height:1.1rem;accent-color:var(--green)}
.inline-form{display:grid;gap:.6rem;margin-top:.8rem}
.spinner{color:var(--slate);padding:2rem;text-align:center}