:root{--paper:#f6f4ee;--surface:#fff;--ink:#22262e;--muted:#6d7280;--line:#dedbd2;--accent:#2f6f45;--error:#b23a2e;--warn:#fff6d8;--radius:10px;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:var(--paper)}
*{box-sizing:border-box}
body{margin:0;min-height:100svh;background:var(--paper)}
[hidden]{display:none!important}
button,input,select{font:inherit}
button{cursor:pointer}
a{color:var(--accent)}
h1,h2,h3{overflow-wrap:anywhere}
.primary{background:var(--accent);color:#fff;border:0;border-radius:var(--radius);padding:12px 18px;font-weight:650;min-height:46px}
.outline{background:var(--surface);color:var(--ink);border:1px solid var(--line);border-radius:var(--radius);padding:9px 14px;min-height:40px}
.text-button{background:none;border:0;color:var(--accent);padding:8px;min-height:40px}
.danger{color:var(--error)}
.muted{color:var(--muted)}
.error{color:var(--error)}
.small{min-height:34px;padding:5px 10px;font-size:14px}
a.outline{text-decoration:none;display:inline-flex;align-items:center}
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:#22262e;color:#fff;padding:12px 18px;border-radius:8px;z-index:100;max-width:min(90vw,480px)}
dialog{border:1px solid var(--line);border-radius:14px;padding:20px;width:min(92vw,560px);max-width:92vw;max-height:90vh;overflow-y:auto;color:var(--ink);background:var(--surface)}
dialog::backdrop{background:#0006}
label{display:grid;gap:6px;font-weight:600}
input,select{border:1px solid var(--line);border-radius:8px;padding:10px 12px;background:#fff;min-height:44px;min-width:0;width:100%}
.form-actions,.dialog-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px;align-items:center}

/* Page frame */
.page-header{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:6px 16px;padding:12px 16px;background:var(--surface);border-bottom:1px solid var(--line)}
.page-header strong{font-size:18px}
.page-header nav{display:flex;flex-wrap:wrap;gap:4px 12px;align-items:center}
.page-header a{font-weight:650}
.page-main{display:grid;gap:16px;padding:16px;max-width:1100px;margin:0 auto}
.panel{background:var(--surface);border-radius:14px;padding:16px;box-shadow:0 2px 10px #0000000d;min-width:0}
.panel h1,.panel h2{margin:0 0 12px}
.panel p{margin:0 0 8px}
.card-form{display:grid;gap:14px}
.card-form p{margin:0}
.note{margin:0;padding:8px 12px;background:var(--warn);border-radius:8px}
.success{color:var(--accent);font-weight:650}

/* Login */
.login-card{width:min(100% - 32px,400px);margin:10vh auto;background:var(--surface);padding:24px;border-radius:16px;box-shadow:0 6px 24px #0001}
.login-card h1{margin:0 0 18px}
.login-card form{display:grid;gap:14px}
.login-card p{margin:14px 0 0}

/* Home */
.set-list{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,240px),1fr));gap:12px}
.set-card{border:1px solid var(--line);border-radius:12px;padding:12px 14px;display:grid;gap:2px;min-width:0}
.set-card strong{overflow-wrap:anywhere}

/* Admin */
.tabs{display:flex;gap:6px}
.tabs button{flex:1 1 0;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);min-height:44px;font-weight:650;color:var(--ink)}
.tabs button[aria-selected=true]{background:var(--accent);border-color:var(--accent);color:#fff}
.filters{display:grid;grid-template-columns:minmax(0,1fr);gap:10px;margin-bottom:14px}
.student-row{cursor:pointer}
.student-row:hover{background:var(--paper)}
.missing{display:block;font-size:13px;color:var(--error)}
.status-pill{font-size:13px;padding:3px 10px;border-radius:999px;background:#eee;white-space:nowrap}
.status-pill.on{background:#d9f2df;color:#1d6b34}
.status-pill.ok{background:#d9f2df;color:#1d6b34}
.status-pill.bad{background:#f6d9d5;color:var(--error)}

/* Table that becomes stacked cards on narrow screens */
.table{width:100%;border-collapse:collapse;font-size:15px}
.table th,.table td{text-align:left;padding:8px 6px;border-bottom:1px solid var(--line);vertical-align:top}
@media(max-width:639px){
  .table,.table tbody,.table tr,.table td{display:block;width:100%}
  .table thead{display:none}
  .table tr{border:1px solid var(--line);border-radius:12px;padding:8px 12px;margin-bottom:10px;background:var(--surface)}
  .table td{border:0;padding:4px 0;display:grid;grid-template-columns:minmax(90px,38%) minmax(0,1fr);gap:8px;overflow-wrap:anywhere}
  .table td::before{content:attr(data-label);color:var(--muted);font-size:13px;font-weight:600}
}
@media(min-width:640px){.filters{grid-template-columns:minmax(0,1fr) 240px}}

/* Student card dialog */
.card-heading{display:flex;justify-content:space-between;align-items:start;gap:8px;margin-bottom:8px}
.card-heading h2{margin:0}
.card-list{display:grid;gap:8px;margin:0}
.card-list div{display:grid;grid-template-columns:minmax(0,1fr);gap:0 8px;overflow-wrap:anywhere}
@media(min-width:480px){.card-list div{grid-template-columns:150px minmax(0,1fr)}}
.card-list dt{overflow-wrap:normal;word-break:keep-all;color:var(--muted);font-size:14px;font-weight:600}
.card-list dd{margin:0}
.secret{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.secret code{font-size:17px;font-weight:700;background:var(--paper);padding:4px 8px;border-radius:6px;user-select:all}
.guardian{margin:0 0 6px}
.events{list-style:none;padding:0;margin:0;display:grid;gap:4px;font-size:14px}
.card-section{margin:16px 0 0;font-size:16px}