/* ITIATI timetable builder — Mobile-first + print-ready */
:root{
  --bg:#0b1220; --panel:#0f1b33; --card:#122041;
  --ink:#eaf1ff; --muted:#b9c7e6; --line:#2a3a63;
  --accent:#4da3ff; --accent2:#2dd4bf; --danger:#ff5d5d;
  --paper:#ffffff; --paper-ink:#111827; --paper-line:#4b5563;
  --break:#fff2cc; --lunch:#e2f0d9; --title:#d9e1f2;
  --header:#ededed; --day:#f4f8ff; --shadow: 0 10px 30px rgba(0,0,0,.25);
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Calibri", sans-serif;
  color:var(--ink);
  background: radial-gradient(1200px 500px at 20% -10%, #1b2d5a 0%, rgba(27,45,90,0) 60%),
              radial-gradient(900px 500px at 90% 0%, #153b5a 0%, rgba(21,59,90,0) 55%),
              linear-gradient(180deg, var(--bg), #070b14);
}

.topbar{position:sticky;top:0;z-index:30;padding:12px;display:flex;gap:10px;align-items:flex-start;justify-content:space-between;border-bottom:1px solid rgba(255,255,255,.06);background:rgba(11,18,32,.82);backdrop-filter:blur(10px)}
.brand{min-width:240px}
.brand__title{font-weight:900;letter-spacing:.4px;font-size:15px}
.brand__meta{margin-top:6px;display:flex;gap:10px;flex-wrap:wrap}
.brand__meta label{font-size:11px;color:var(--muted)}
.brand__meta input{margin-left:6px;padding:6px 8px;border-radius:10px;border:1px solid var(--line);background:#0a1326;color:var(--ink)}

.actions{display:none;gap:8px;align-items:center;flex-wrap:wrap;justify-content:flex-end}
.panelToggle{display:inline-flex;align-items:center;justify-content:center;width:42px;height:40px;border-radius:12px;border:1px solid rgba(255,255,255,.15);background:rgba(255,255,255,.06);color:var(--ink);cursor:pointer;font-size:18px}

.btn{appearance:none;border:1px solid rgba(255,255,255,.15);background:rgba(255,255,255,.06);color:var(--ink);padding:8px 10px;border-radius:12px;cursor:pointer;font-weight:750}
.btn.primary{background:rgba(77,163,255,.22);border-color:rgba(77,163,255,.45)}
.btn.accent{background:rgba(45,212,191,.20);border-color:rgba(45,212,191,.45)}
.btn.danger{background:rgba(255,93,93,.14);border-color:rgba(255,93,93,.45)}
.sep{display:inline-block;width:1px;height:28px;background:rgba(255,255,255,.12);margin:0 4px}

.layout{display:grid;grid-template-columns:1fr;gap:12px;padding:12px;align-items:start}
.panel{position:fixed;inset:0 0 0 auto;width:min(420px,92vw);transform:translateX(110%);transition:transform .2s ease;background:rgba(11,18,32,.98);border-left:1px solid rgba(255,255,255,.10);padding:12px;overflow:auto;z-index:40}
.panel.open{transform:translateX(0)}
.panelHead{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}

.card{background:rgba(18,32,65,.72);border:1px solid rgba(255,255,255,.08);border-radius:16px;padding:12px;box-shadow:var(--shadow);margin-bottom:12px}
.cardHead{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}
.cardActions{display:flex;gap:8px;flex-wrap:wrap}
.card h3{margin:0 0 8px 0;font-size:13px}

.row{display:flex;gap:10px;align-items:center;justify-content:space-between;margin:8px 0}
.row label{font-size:11px;color:var(--muted)}
.row input,.row select{flex:1;margin-left:8px;padding:8px 10px;border-radius:12px;border:1px solid var(--line);background:#0a1326;color:var(--ink)}

.lbl{display:block;font-size:11px;color:var(--muted);margin-bottom:6px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:10px}
.grid2 input{width:100%;padding:8px 10px;border-radius:12px;border:1px solid var(--line);background:#0a1326;color:var(--ink)}
.chk{display:flex;gap:8px;align-items:center;color:var(--muted);font-size:12px;margin:6px 0}
.chkWrap{display:flex;align-items:flex-end}
.hint{font-size:12px;color:rgba(233,241,255,.70);line-height:1.35}
.tips{margin:8px 0 0 18px;color:rgba(233,241,255,.75);font-size:12px}

.list{display:flex;flex-direction:column;gap:6px;margin:10px 0}
.listItem{display:flex;gap:8px;align-items:center;justify-content:space-between;padding:8px 10px;border-radius:12px;border:1px solid rgba(255,255,255,.08);background:rgba(0,0,0,.10)}
.listItem b{font-size:12px}
.listItem span{font-size:12px;color:var(--muted)}
.pills{display:flex;gap:6px;align-items:center;flex-wrap:wrap;justify-content:flex-end}
.pill{font-size:11px;padding:2px 8px;border-radius:999px;border:1px solid rgba(255,255,255,.14);color:rgba(233,241,255,.85)}

.assign{display:flex;flex-direction:column;gap:8px;margin-top:10px}
.assignRow{display:grid;grid-template-columns:1fr 1.2fr;gap:8px;align-items:center;padding:8px;border-radius:12px;border:1px solid rgba(255,255,255,.10);background:rgba(0,0,0,.10)}
.assignRow .name{font-weight:900;font-size:12px}
.assignRow .abbrev{font-size:11px;color:rgba(233,241,255,.65)}
.assignRow input{width:100%;padding:8px 10px;border-radius:12px;border:1px solid var(--line);background:#0a1326;color:var(--ink)}

.workspace{min-width:0}
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:10px}
.tab{padding:10px 12px;border-radius:14px;border:1px solid rgba(255,255,255,.10);background:rgba(255,255,255,.05);cursor:pointer;font-weight:850}
.tab.active{background:rgba(77,163,255,.20);border-color:rgba(77,163,255,.45)}

.sheetWrap{background:rgba(18,32,65,.55);border:1px solid rgba(255,255,255,.08);border-radius:18px;padding:12px;box-shadow:var(--shadow)}
.sheetHeader{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;margin-bottom:10px}
.sheetHeader h2{margin:0}
.submeta{font-size:12px;color:rgba(233,241,255,.70);margin-top:4px}

.tableWrap{overflow:auto;padding-bottom:10px}

.timetable{border-collapse:collapse;background:var(--paper);color:var(--paper-ink);width:100%;min-width:1120px;border:2px solid var(--paper-line)}
.timetable td,.timetable th{border:1px solid var(--paper-line);padding:8px 6px;text-align:center;vertical-align:middle;font-size:12px;line-height:1.15}
.timetable .titleRow td{background:var(--title);font-weight:900;font-size:18px;letter-spacing:.4px;padding:10px 6px}
.timetable .headerRow th{background:var(--header);font-weight:900}
.timetable .dayCell{background:var(--day);font-weight:900;position:sticky;left:0;z-index:5}
.timetable .breakCell{background:var(--break);font-weight:900}
.timetable .lunchCell{background:var(--lunch);font-weight:900}
.timetable .headerRow th:first-child,.timetable .titleRow td:first-child{position:sticky;left:0;z-index:6}

.lesson{user-select:none;border-radius:8px;padding:6px 6px;border:1px solid rgba(17,24,39,.35);background:rgba(77,163,255,.10)}
.lesson small{display:block;opacity:.80;font-weight:750;margin-top:3px}
.lesson.double{outline:2px dashed rgba(17,24,39,.55)}
.lesson.conflict{background:rgba(255,93,93,.20);border-color:rgba(255,93,93,.60)}

.cellEditable{cursor:text}
.cellEmpty{color:#6b7280}

.status{font-size:12px;color:rgba(233,241,255,.75);margin-top:8px;padding:10px 12px;border-radius:14px;border:1px dashed rgba(255,255,255,.18);background:rgba(0,0,0,.16);white-space:pre-wrap}

.dialog{width:min(1100px,96vw);border:1px solid rgba(255,255,255,.18);border-radius:16px;background:rgba(11,18,32,.98);color:var(--ink);padding:14px}
.dialog::backdrop{background:rgba(0,0,0,.55)}
.dialog__head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px}
.dialog__foot{display:flex;justify-content:flex-end;gap:10px;margin-top:10px}

.editBox{min-width:200px}
.edit{display:flex;flex-direction:column;gap:8px}
.edit select,.edit input{padding:10px 10px;border-radius:12px;border:1px solid rgba(17,24,39,.25);font-size:13px}
.edit__buttons{display:flex;gap:8px;justify-content:flex-end}
.edit__hint{font-size:11px;color:#6b7280}

.toastHost{position:fixed;bottom:14px;left:50%;transform:translateX(-50%);z-index:50;display:flex;flex-direction:column;gap:8px;width:min(560px,92vw)}
.toast{background:rgba(17,24,39,.95);color:#fff;border:1px solid rgba(255,255,255,.12);border-radius:14px;padding:10px 12px;box-shadow:var(--shadow);display:flex;gap:10px;align-items:flex-start;justify-content:space-between}
.toast b{display:block;font-size:13px}
.toast span{display:block;font-size:12px;opacity:.85;margin-top:2px}
.toast .x{background:transparent;border:none;color:#fff;cursor:pointer;font-size:16px;line-height:1}

.footer{padding:10px 14px;color:rgba(233,241,255,.55);font-size:12px}

@media (min-width:1100px){
  .actions{display:flex}
  .panelToggle{display:none}
  .layout{grid-template-columns:420px 1fr}
  .panel{position:sticky;inset:auto;transform:none;width:auto;background:transparent;border:none;padding:0;overflow:visible;z-index:auto}
  .panel.open{transform:none}
}

@media print{
  body{background:#fff;color:#000}
  .topbar,.panel,.tabs,.footer,.sheetHeader__right,.status,.toastHost{display:none !important}
  .layout{display:block;padding:0}
  .sheetWrap{border:none;box-shadow:none;padding:0}
  .timetable{min-width:0;width:100%}
}