:root {
    --bg: #f5f5f7;
    --surface: #ffffff;
    --surface-2: #fafafa;
    --border: #e5e5ea;
    --text: #1d1d1f;
    --text-2: #6e6e73;
    --text-3: #9a9aa0;
    --accent: #0071e3;
    --accent-hover: #0077ed;
    --accent-soft: #e8f1fe;
    --green: #34c759;
    --green-soft: #e7f8ec;
    --amber: #ff9f0a;
    --amber-soft: #fff4e0;
    --red: #ff3b30;
    --red-soft: #ffeceb;
    --purple: #5e5ce6;
    --purple-soft: #ecebfc;
    --radius: 14px;
    --radius-sm: 10px;
    --shadow: 0 1px 2px rgba(0,0,0,.04), 0 8px 24px rgba(0,0,0,.05);
    --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
    --sidebar-w: 248px;
  }
  * { box-sizing: border-box; margin: 0; padding: 0; }
  html, body { height: 100%; }
  body {
    font-family: 'Public Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    font-size: 14.5px;
    line-height: 1.55;
    letter-spacing: 0.1px;
  }
  button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
  input, select, textarea { font-family: inherit; font-size: 14px; }
  a { color: inherit; text-decoration: none; }
  ::-webkit-scrollbar { width: 10px; height: 10px; }
  ::-webkit-scrollbar-thumb { background: #d4d4d9; border-radius: 6px; border: 2px solid var(--bg); }

  /* ---------- Buttons ---------- */
  .btn {
    display: inline-flex; align-items: center; gap: 7px;
    padding: 9px 16px; border-radius: 980px; font-weight: 500; font-size: 13.5px;
    background: var(--surface); border: 1px solid var(--border); color: var(--text);
    transition: all .15s ease; white-space: nowrap;
  }
  .btn:hover { background: #f0f0f2; }
  .btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
  .btn-primary:hover { background: var(--accent-hover); }
  .btn-ghost { background: transparent; border-color: transparent; color: var(--accent); }
  .btn-ghost:hover { background: var(--accent-soft); }
  .btn-danger { color: var(--red); }
  .btn-danger:hover { background: var(--red-soft); }
  .btn-sm { padding: 6px 12px; font-size: 12.5px; }
  .btn .ic { font-size: 16px; line-height: 1; }

  /* ---------- Badges ---------- */
  .badge {
    display: inline-flex; align-items: center; gap: 5px;
    padding: 3px 10px; border-radius: 980px; font-size: 12px; font-weight: 600;
  }
  .badge .dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
  .b-green { background: var(--green-soft); color: #1e8e3e; }
  .b-amber { background: var(--amber-soft); color: #b26a00; }
  .b-red { background: var(--red-soft); color: #c62016; }
  .b-blue { background: var(--accent-soft); color: #0058b0; }
  .b-purple { background: var(--purple-soft); color: #4a48c4; }
  .b-gray { background: #ececed; color: #6e6e73; }

  /* ---------- Layout ---------- */
  .app { display: none; min-height: 100vh; }
  .app.active { display: grid; grid-template-columns: var(--sidebar-w) 1fr; }

  /* Sidebar */
  .sidebar {
    background: #fbfbfd; border-right: 1px solid var(--border);
    display: flex; flex-direction: column; height: 100vh; position: sticky; top: 0;
  }
  .brand { display: flex; align-items: center; gap: 10px; padding: 20px 22px 18px; }
  .brand .logo {
    width: 30px; height: 30px; border-radius: 8px;
    background: linear-gradient(135deg, #0071e3, #5e5ce6);
    display: grid; place-items: center; color: #fff; font-weight: 700; font-size: 15px;
  }
  .brand .name { font-weight: 700; font-size: 17px; letter-spacing: -.3px; }
  .nav { flex: 1; padding: 6px 12px; overflow-y: auto; }
  .nav-group-label { font-size: 11px; font-weight: 600; color: var(--text-3); text-transform: uppercase; letter-spacing: .5px; padding: 14px 12px 6px; }
  .nav-item {
    display: flex; align-items: center; gap: 11px; width: 100%;
    padding: 9px 12px; border-radius: 9px; color: var(--text-2); font-weight: 500;
    font-size: 13.5px; text-align: left; transition: all .12s ease;
  }
  .nav-item:hover { background: #efeff1; color: var(--text); }
  .nav-item.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
  .nav-item .ic { font-size: 18px; width: 20px; text-align: center; }
  .sidebar-foot { padding: 12px; border-top: 1px solid var(--border); }
  .user-chip { display: flex; align-items: center; gap: 10px; padding: 8px 10px; border-radius: 10px; }
  .user-chip:hover { background: #efeff1; }
  .avatar { width: 32px; height: 32px; border-radius: 50%; background: var(--purple-soft); color: var(--purple); display: grid; place-items: center; font-weight: 600; font-size: 13px; }
  .user-chip .meta { flex: 1; min-width: 0; }
  .user-chip .meta .n { font-weight: 600; font-size: 13px; }
  .user-chip .meta .r { font-size: 11.5px; color: var(--text-3); }

  /* Main */
  .main { min-width: 0; display: flex; flex-direction: column; height: 100vh; overflow: hidden; }
  .topbar {
    display: flex; align-items: center; gap: 16px;
    padding: 14px 32px; border-bottom: 1px solid var(--border); background: rgba(255,255,255,.8);
    backdrop-filter: saturate(180%) blur(20px); position: sticky; top: 0; z-index: 5;
  }
  .topbar h1 { font-size: 20px; font-weight: 600; letter-spacing: -.4px; }
  .topbar .sub { color: var(--text-3); font-size: 13px; }
  .search {
    display: flex; align-items: center; gap: 8px; background: var(--surface-2);
    border: 1px solid var(--border); border-radius: 980px; padding: 7px 14px; min-width: 260px;
  }
  .search input { border: none; background: none; outline: none; flex: 1; color: var(--text); }
  .search .ic { color: var(--text-3); }
  .spacer { flex: 1; }
  .content { padding: 28px 32px 60px; overflow-y: auto; flex: 1; }

  /* View switching */
  .view { display: none; animation: fade .25s ease; }
  .view.active { display: block; }
  @keyframes fade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

  /* Cards & grids */
  .grid { display: grid; gap: 16px; }
  .cols-4 { grid-template-columns: repeat(4, 1fr); }
  .cols-3 { grid-template-columns: repeat(3, 1fr); }
  .cols-2 { grid-template-columns: repeat(2, 1fr); }
  @media (max-width: 1100px) { .cols-4 { grid-template-columns: repeat(2,1fr);} .cols-3{grid-template-columns:repeat(2,1fr);} }
  .card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow-sm); }
  .card-pad { padding: 20px; }
  .card-head { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; border-bottom: 1px solid var(--border); }
  .card-head h3 { font-size: 15px; font-weight: 600; }

  .stat { padding: 20px; }
  .stat .label { color: var(--text-2); font-size: 13px; font-weight: 500; display: flex; align-items: center; gap: 8px; }
  .stat .value { font-size: 30px; font-weight: 700; letter-spacing: -1px; margin-top: 10px; }
  .stat .delta { font-size: 12.5px; margin-top: 4px; }
  .stat .ic-box { width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; font-size: 18px; }

  /* Tables */
  .table-wrap { overflow-x: auto; }
  table { width: 100%; border-collapse: collapse; }
  th { text-align: left; font-size: 11.5px; font-weight: 600; color: var(--text-3); text-transform: uppercase; letter-spacing: .4px; padding: 12px 16px; border-bottom: 1px solid var(--border); }
  td { padding: 13px 16px; border-bottom: 1px solid var(--border); font-size: 13.5px; vertical-align: middle; }
  tbody tr { transition: background .12s; }
  tbody tr:hover { background: var(--surface-2); }
  tbody tr:last-child td { border-bottom: none; }
  tr.clickable { cursor: pointer; }
  .cell-main { font-weight: 600; }
  .cell-sub { color: var(--text-3); font-size: 12px; }

  /* Toolbar */
  .toolbar { display: flex; align-items: center; gap: 10px; margin-bottom: 18px; flex-wrap: wrap; }
  .seg { display: inline-flex; background: #ececee; border-radius: 980px; padding: 3px; }
  .seg button { padding: 6px 14px; border-radius: 980px; font-size: 13px; font-weight: 500; color: var(--text-2); }
  .seg button.active { background: #fff; color: var(--text); box-shadow: var(--shadow-sm); }
  .filter-pill { padding: 7px 14px; border: 1px solid var(--border); border-radius: 980px; background: var(--surface); font-size: 13px; font-weight: 500; display: inline-flex; gap: 6px; align-items: center; }

  .section-title { font-size: 13px; font-weight: 600; color: var(--text-3); text-transform: uppercase; letter-spacing: .4px; margin: 4px 0 12px; }
  .page-actions { display: flex; gap: 10px; }

  /* Detail layouts */
  .detail-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 20px; align-items: start; }
  @media (max-width: 1000px){ .detail-grid { grid-template-columns: 1fr; } }
  .kv { display: flex; justify-content: space-between; padding: 11px 0; border-bottom: 1px solid var(--border); font-size: 13.5px; }
  .kv:last-child { border-bottom: none; }
  .kv .k { color: var(--text-2); }
  .kv .v { font-weight: 500; text-align: right; }
  .avatar-lg { width: 56px; height: 56px; border-radius: 50%; font-size: 20px; }

  .back-link { display: inline-flex; align-items: center; gap: 6px; color: var(--accent); font-weight: 500; font-size: 13.5px; margin-bottom: 14px; }

  /* Forms */
  .form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px 20px; }
  .field { display: flex; flex-direction: column; gap: 6px; }
  .field.full { grid-column: 1 / -1; }
  .field label { font-size: 12.5px; font-weight: 600; color: var(--text-2); }
  .field label .req { color: var(--red); }
  .field input, .field select, .field textarea {
    padding: 10px 12px; border: 1px solid var(--border); border-radius: var(--radius-sm);
    background: var(--surface); outline: none; transition: border .12s, box-shadow .12s;
  }
  .field input:focus, .field select:focus, .field textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
  .field .hint { font-size: 11.5px; color: var(--text-3); }
  .form-foot { display: flex; justify-content: flex-end; gap: 10px; margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--border); }

  /* Modal */
  .modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.32); display: none; place-items: center; z-index: 50; padding: 24px; backdrop-filter: blur(2px); }
  .modal-overlay.active { display: grid; }
  .modal { background: var(--surface); border-radius: 18px; width: 100%; max-width: 560px; max-height: 88vh; overflow-y: auto; box-shadow: 0 20px 60px rgba(0,0,0,.3); animation: pop .2s ease; }
  .modal.wide { max-width: 720px; }
  @keyframes pop { from { opacity:0; transform: scale(.96) translateY(10px);} to {opacity:1; transform:none;} }
  .modal-head { display: flex; align-items: center; justify-content: space-between; padding: 20px 24px; border-bottom: 1px solid var(--border); position: sticky; top: 0; background: var(--surface); }
  .modal-head h2 { font-size: 18px; font-weight: 600; }
  .modal-body { padding: 24px; }
  .close-x { width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center; color: var(--text-2); font-size: 18px; }
  .close-x:hover { background: #f0f0f2; }

  /* Timeline / list rows */
  .list-row { display: flex; align-items: center; gap: 14px; padding: 13px 0; border-bottom: 1px solid var(--border); }
  .list-row:last-child { border-bottom: none; }
  .list-row .ic-round { width: 38px; height: 38px; border-radius: 10px; display: grid; place-items: center; font-size: 18px; flex-shrink: 0; }
  .list-row .grow { flex: 1; min-width: 0; }
  .list-row .t { font-weight: 600; font-size: 13.5px; }
  .list-row .s { color: var(--text-3); font-size: 12.5px; }

  .progress { height: 7px; background: #ececee; border-radius: 6px; overflow: hidden; }
  .progress > span { display: block; height: 100%; background: var(--green); border-radius: 6px; }

  /* Calendar */
  .cal { display: grid; grid-template-columns: 56px repeat(6, 1fr); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: var(--surface); }
  .cal .cal-h { padding: 12px 8px; text-align: center; font-size: 12.5px; font-weight: 600; border-bottom: 1px solid var(--border); border-left: 1px solid var(--border); background: var(--surface-2); }
  .cal .cal-h.corner { border-left: none; }
  .cal .cal-h small { display: block; color: var(--text-3); font-weight: 500; font-size: 11px; }
  .cal .hourcell { padding: 8px; font-size: 11.5px; color: var(--text-3); text-align: right; border-bottom: 1px solid var(--border); min-height: 62px; }
  .cal .slot { border-left: 1px solid var(--border); border-bottom: 1px solid var(--border); padding: 4px; min-height: 62px; position: relative; }
  .cal .slot:hover { background: var(--accent-soft); cursor: pointer; }
  .appt { border-radius: 8px; padding: 6px 8px; font-size: 11.5px; font-weight: 600; margin-bottom: 3px; cursor: pointer; line-height: 1.3; }
  .appt small { display: block; font-weight: 500; opacity: .85; }
  .appt.a-blue { background: var(--accent-soft); color: #0058b0; border-left: 3px solid var(--accent); }
  .appt.a-green { background: var(--green-soft); color: #1e8e3e; border-left: 3px solid var(--green); }
  .appt.a-amber { background: var(--amber-soft); color: #b26a00; border-left: 3px solid var(--amber); }
  .appt.a-purple { background: var(--purple-soft); color: #4a48c4; border-left: 3px solid var(--purple); }

  /* Login */
  #login { display: grid; place-items: center; min-height: 100vh; background: radial-gradient(1200px 600px at 50% -10%, #eaf1fb, var(--bg)); }
  .login-card { background: var(--surface); border: 1px solid var(--border); border-radius: 22px; padding: 40px; width: 100%; max-width: 400px; box-shadow: var(--shadow); text-align: center; }
  .login-card .logo-lg { width: 56px; height: 56px; border-radius: 15px; background: linear-gradient(135deg,#0071e3,#5e5ce6); display: grid; place-items: center; color:#fff; font-weight:700; font-size:26px; margin: 0 auto 18px; }
  .login-card h1 { font-size: 26px; letter-spacing: -.6px; }
  .login-card p { color: var(--text-2); margin-top: 6px; margin-bottom: 26px; }
  .role-pick { display: flex; flex-direction: column; gap: 10px; margin-bottom: 20px; }
  .role-btn { display: flex; align-items: center; gap: 12px; padding: 13px 16px; border: 1px solid var(--border); border-radius: 12px; text-align: left; transition: all .12s; }
  .role-btn:hover { border-color: var(--accent); background: var(--accent-soft); }
  .role-btn .ic { font-size: 22px; width: 26px; text-align: center; }
  .role-btn .rt { font-weight: 600; }
  .role-btn .rs { font-size: 12px; color: var(--text-3); }

  .empty { text-align: center; padding: 40px; color: var(--text-3); }
  .mock-note { font-size: 11.5px; color: var(--text-3); }
  .divider { height: 1px; background: var(--border); margin: 20px 0; }
  .chips { display: flex; gap: 6px; flex-wrap: wrap; }
  .flag { padding: 10px 14px; border-radius: 10px; font-size: 12.5px; display: flex; gap: 8px; align-items: flex-start; }
  .flag.warn { background: var(--amber-soft); color: #8a5300; }
  .flag.info { background: var(--accent-soft); color: #0058b0; }
  .stepper { display: flex; gap: 0; margin-bottom: 24px; }
  .step { flex:1; text-align:center; font-size:12.5px; font-weight:600; color:var(--text-3); position:relative; padding-bottom:12px; }
  .step.active { color: var(--accent); }
  .step.done { color: var(--green); }
  .step::after { content:''; position:absolute; bottom:0; left:0; right:0; height:2px; background: var(--border); }
  .step.active::after { background: var(--accent); }
  .step.done::after { background: var(--green); }