:root{
    --ink:#1a2238;        /* deep slate-navy */
    --ink-soft:#4a5578;
    --paper:#f6f4ef;      /* warm off-white */
    --card:#ffffff;
    --line:#e3ded3;
    --line-strong:#cfc8b8;
    --accent:#c2542f;     /* clay/terracotta — used sparingly */
    --accent-soft:#f3e2d9;
    --room-a:#3a7ca5;     /* room A = small (10) */
    --room-a-soft:#e2eef4;
    --room-b:#6b8f3a;     /* room B = large (20) */
    --room-b-soft:#e8efdd;
    --warn:#b3341f;
    --warn-soft:#f7e0db;
    --ok:#3d7a52;
    --shadow:0 1px 2px rgba(26,34,56,.06), 0 4px 16px rgba(26,34,56,.06);
    --radius:10px;
  }
  *{box-sizing:border-box;margin:0;padding:0}
  body{
    font-family:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
    background:var(--paper);color:var(--ink);
    -webkit-font-smoothing:antialiased;line-height:1.45;
  }
  h1,h2,h3{font-weight:650;letter-spacing:-.01em;line-height:1.15}
  button{font-family:inherit;cursor:pointer;border:none;background:none}
  input,select,textarea{font-family:inherit;font-size:14px}

  /* ---- Top bar ---- */
  header{
    background:var(--ink);color:#fff;padding:0 20px;
    display:flex;align-items:center;gap:18px;height:58px;
    position:sticky;top:0;z-index:50;
  }
  .brand{font-weight:700;font-size:16px;letter-spacing:.02em;display:flex;align-items:center;gap:9px}
  .brand-logo{height:28px;width:auto;display:block;border-radius:4px}
  .auth-card .brand-logo{height:34px}
  .brand .dot{width:10px;height:10px;background:var(--accent);border-radius:2px;transform:rotate(45deg)}
  nav{display:flex;gap:2px;margin-left:6px;flex-wrap:wrap}
  nav button{
    color:#c7ccdd;padding:8px 13px;border-radius:7px;font-size:13.5px;font-weight:500;
    transition:.15s;
  }
  nav button:hover{color:#fff;background:rgba(255,255,255,.08)}
  nav button.active{color:#fff;background:rgba(255,255,255,.14)}
  .who{margin-left:auto;display:flex;align-items:center;gap:10px;font-size:13px}
  .who select{
    background:rgba(255,255,255,.1);color:#fff;border:1px solid rgba(255,255,255,.2);
    padding:6px 9px;border-radius:7px;
  }
  .who select option{color:var(--ink)}
  .role-pill{font-size:11px;text-transform:uppercase;letter-spacing:.06em;background:var(--accent);
    padding:3px 8px;border-radius:20px;font-weight:600}

  /* ---- Layout ---- */
  main{max-width:1180px;margin:0 auto;padding:26px 20px 80px}
  .page-head{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:20px;gap:16px;flex-wrap:wrap}
  .page-head .eyebrow{font-size:11.5px;text-transform:uppercase;letter-spacing:.1em;color:var(--accent);font-weight:600;margin-bottom:4px}
  .page-head h2{font-size:26px}
  .page-head p{color:var(--ink-soft);font-size:14px;margin-top:3px}

  .btn{
    background:var(--ink);color:#fff;padding:9px 15px;border-radius:8px;font-size:13.5px;font-weight:550;
    display:inline-flex;align-items:center;gap:7px;transition:.15s;
  }
  .btn:hover{background:#2a3551}
  .btn.accent{background:var(--accent)}
  .btn.accent:hover{background:#a8451f}
  .btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line-strong)}
  .btn.ghost:hover{background:#fff}
  .btn.sm{padding:6px 11px;font-size:12.5px}
  .btn:disabled{opacity:.4;cursor:not-allowed}

  /* ---- Cards / grids ---- */
  .grid{display:grid;gap:14px}
  .cards{grid-template-columns:repeat(auto-fill,minmax(270px,1fr))}
  .card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow)}
  .card h3{font-size:16px;margin-bottom:6px}
  .card .meta{font-size:13px;color:var(--ink-soft);display:flex;flex-direction:column;gap:3px}
  .card .meta b{color:var(--ink);font-weight:600}
  .card-actions{display:flex;gap:7px;margin-top:13px;flex-wrap:wrap}

  .empty{
    text-align:center;padding:54px 20px;color:var(--ink-soft);
    border:1.5px dashed var(--line-strong);border-radius:var(--radius);background:rgba(255,255,255,.5);
  }
  .empty h3{color:var(--ink);margin-bottom:6px;font-size:17px}
  .empty p{font-size:14px;margin-bottom:16px}

  /* ---- Tables ---- */
  table{width:100%;border-collapse:collapse;background:var(--card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
  th,td{text-align:left;padding:11px 14px;font-size:13.5px;border-bottom:1px solid var(--line)}
  th{background:#faf8f3;font-size:11.5px;text-transform:uppercase;letter-spacing:.05em;color:var(--ink-soft);font-weight:600}
  tr:last-child td{border-bottom:none}
  tbody tr:hover{background:#faf9f5}

  /* ---- Badges ---- */
  .tag{display:inline-flex;align-items:center;gap:5px;font-size:12px;font-weight:600;padding:3px 9px;border-radius:20px}
  .tag.a{background:var(--room-a-soft);color:var(--room-a)}
  .tag.b{background:var(--room-b-soft);color:var(--room-b)}
  .tag.full{background:var(--warn-soft);color:var(--warn)}
  .tag.open{background:#e7f0e9;color:var(--ok)}
  .tag.wait{background:#f3ecd9;color:#8a6d1e}
  .cap-bar{height:6px;border-radius:4px;background:var(--line);overflow:hidden;margin-top:6px;width:120px}
  .cap-bar i{display:block;height:100%;background:var(--ok)}
  .cap-bar.full i{background:var(--warn)}

  .conflict{display:flex;align-items:flex-start;gap:8px;background:var(--warn-soft);color:var(--warn);
    padding:9px 12px;border-radius:8px;font-size:13px;margin-bottom:10px;font-weight:500}
  .conflict svg{flex-shrink:0;margin-top:1px}

  /* ---- Modal ---- */
  .scrim{position:fixed;inset:0;background:rgba(26,34,56,.42);display:flex;align-items:flex-start;
    justify-content:center;padding:40px 16px;z-index:100;overflow-y:auto}
  .modal{background:var(--card);border-radius:14px;width:100%;max-width:520px;box-shadow:0 18px 50px rgba(26,34,56,.28)}
  .modal-head{padding:18px 22px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center}
  .modal-head h3{font-size:18px}
  .modal-body{padding:20px 22px;display:flex;flex-direction:column;gap:14px}
  .modal-foot{padding:15px 22px;border-top:1px solid var(--line);display:flex;justify-content:flex-end;gap:9px}
  .field{display:flex;flex-direction:column;gap:5px}
  .field label{font-size:12.5px;font-weight:600;color:var(--ink-soft)}
  .field input,.field select,.field textarea{
    padding:9px 11px;border:1px solid var(--line-strong);border-radius:8px;background:#fff;color:var(--ink);
  }
  .field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--accent-soft);border-color:var(--accent)}
  .field .hint{font-size:12px;color:var(--ink-soft)}
  .row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
  .x{font-size:22px;color:var(--ink-soft);line-height:1;padding:2px 6px;border-radius:6px}
  .x:hover{background:var(--paper);color:var(--ink)}

  /* ---- Calendar ---- */
  .cal-nav{display:flex;align-items:center;gap:12px;margin-bottom:16px}
  .cal-nav .mlabel{font-size:18px;font-weight:650;min-width:170px;text-align:center}
  .cal{display:grid;grid-template-columns:repeat(7,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
  .cal .dow{background:#faf8f3;padding:8px;font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:var(--ink-soft);font-weight:600;text-align:center}
  .cal .day{background:var(--card);min-height:104px;padding:6px 6px 8px;position:relative}
  .cal .day.dim{background:#faf9f6}
  .cal .day .dnum{font-size:12.5px;color:var(--ink-soft);font-weight:600;margin-bottom:4px}
  .cal .day.today .dnum{background:var(--accent);color:#fff;width:21px;height:21px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center}
  .ev{font-size:11.5px;padding:3px 6px;border-radius:5px;margin-bottom:3px;cursor:pointer;line-height:1.25;
    white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:550}
  .ev.a{background:var(--room-a-soft);color:var(--room-a)}
  .ev.b{background:var(--room-b-soft);color:var(--room-b)}
  .ev:hover{filter:brightness(.96)}
  /* multi-day spans read as one connected block: square the joined edges, mark continuation days */
  .ev.ev-span{border-radius:0}
  .ev.ev-start{border-top-left-radius:5px;border-bottom-left-radius:5px}
  .ev.ev-end{border-top-right-radius:5px;border-bottom-right-radius:5px}
  .ev.ev-mid,.ev.ev-end{border-left:3px solid currentColor;font-style:italic}

  .legend{display:flex;gap:16px;margin-top:14px;font-size:12.5px;color:var(--ink-soft);flex-wrap:wrap}
  .legend span{display:inline-flex;align-items:center;gap:6px}
  .legend i{width:11px;height:11px;border-radius:3px;display:inline-block}

  .toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;
    padding:11px 18px;border-radius:9px;font-size:13.5px;box-shadow:var(--shadow);z-index:200;
    opacity:0;transition:.25s;pointer-events:none}
  .toast.show{opacity:1}

  .note{font-size:12.5px;color:var(--ink-soft);background:#fff;border:1px solid var(--line);
    border-left:3px solid var(--accent);padding:11px 14px;border-radius:8px;margin-bottom:18px}
  @media(max-width:640px){
    .row2{grid-template-columns:1fr}
    nav{display:none}
    .cal .day{min-height:78px}
  }

  /* ---- Auth pages (login / setup) ---- */
  .auth-bg{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:24px}
  .auth-card{background:var(--card);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);
    padding:30px;width:100%;max-width:380px}
  .auth-card .brand{color:var(--ink);font-size:17px;margin-bottom:18px}
  .auth-card h1{font-size:22px;margin-bottom:6px}
  .auth-card .muted{color:var(--ink-soft);font-size:13.5px;margin-bottom:18px}
  .auth-card label{display:block;font-size:12.5px;font-weight:600;color:var(--ink-soft);margin-bottom:13px}
  .auth-card input{display:block;width:100%;margin-top:5px;padding:10px 11px;border:1px solid var(--line-strong);
    border-radius:8px;font-size:14px}
  .auth-card input:focus{outline:2px solid var(--accent-soft);border-color:var(--accent)}
  .btn.block{display:flex;width:100%;justify-content:center;margin-top:6px;padding:11px}
  .alert{background:var(--warn-soft);color:var(--warn);padding:10px 13px;border-radius:8px;font-size:13.5px;margin-bottom:16px;font-weight:500}
  .uname{font-size:13px;color:#c7ccdd}
  .loading{text-align:center;padding:60px;color:var(--ink-soft)}
  code{background:var(--paper);padding:2px 6px;border-radius:5px;font-size:13px}