:root{
    --green:#10773C;
    --green-dark:#0B5A2E;
    --green-light:#E7F2EB;
    --green-pale:#F4F9F6;
    --ink:#16241C;
    --ink-soft:#5B6B62;
    --amber:#B4700F;
    --amber-bg:#FBF0DD;
    --red:#B3261E;
    --red-bg:#FCEAE8;
    --white:#FFFFFF;
    --border:#DCE7E0;
    --radius:12px;
    --shadow:0 2px 10px rgba(16,55,35,0.08);
    --shadow-lg:0 12px 32px rgba(16,55,35,0.16);
  }
  *{box-sizing:border-box;}
  html,body{margin:0;padding:0;}
  body{
    font-family:"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
    background:var(--green-pale);
    color:var(--ink);
    min-height:100vh;
    -webkit-font-smoothing:antialiased;
  }
  #root{min-height:100vh;display:flex;flex-direction:column;}
  button{font-family:inherit;cursor:pointer;}
  input,select,textarea{font-family:inherit;}
  a{color:inherit;}

  /* ---------- Login ---------- */
  .login-wrap{
    flex:1;display:flex;align-items:center;justify-content:center;
    padding:24px;
    background:
      radial-gradient(circle at 15% 10%, rgba(16,119,60,0.10), transparent 40%),
      radial-gradient(circle at 85% 90%, rgba(16,119,60,0.10), transparent 40%),
      var(--green-pale);
  }
  .login-card{
    background:var(--white);
    border:1px solid var(--border);
    border-radius:16px;
    box-shadow:var(--shadow-lg);
    padding:40px 36px 32px;
    width:100%;max-width:380px;
    text-align:center;
  }
  .login-logo{width:96px;height:auto;margin-bottom:8px;}
  .login-brand{font-size:13px;letter-spacing:1.5px;font-weight:700;color:var(--green);text-transform:uppercase;margin:0 0 2px;}
  .login-sub{font-size:12.5px;color:var(--ink-soft);margin:0 0 26px;}
  .field{text-align:left;margin-bottom:14px;}
  .field label{display:block;font-size:12.5px;font-weight:600;color:var(--ink-soft);margin-bottom:6px;}
  .field input, .field select, .field textarea{
    width:100%;padding:11px 12px;border:1.5px solid var(--border);border-radius:9px;
    font-size:14.5px;color:var(--ink);background:var(--white);outline:none;
    transition:border-color .15s;
  }
  .field input:focus, .field select:focus, .field textarea:focus{border-color:var(--green);}
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:6px;
    padding:11px 18px;border-radius:9px;border:none;font-size:14.5px;font-weight:700;
    transition:transform .1s, background .15s, box-shadow .15s;
  }
  .btn:active{transform:scale(0.98);}
  .btn-primary{background:var(--green);color:#fff;width:100%;}
  .btn-primary:hover{background:var(--green-dark);}
  .btn-ghost{background:transparent;color:var(--green);border:1.5px solid var(--green-light);}
  .btn-ghost:hover{background:var(--green-light);}
  .btn-outline{background:#fff;color:var(--ink);border:1.5px solid var(--border);}
  .btn-outline:hover{border-color:var(--green);color:var(--green);}
  .btn-danger{background:var(--red-bg);color:var(--red);border:1.5px solid #f2c9c5;}
  .btn-danger:hover{background:#f8d9d6;}
  .btn-approve{background:var(--green-light);color:var(--green-dark);border:1.5px solid #bfe0cd;}
  .btn-approve:hover{background:#d9efe3;}
  .btn-sm{padding:7px 12px;font-size:13px;border-radius:7px;}
  .login-error{background:var(--red-bg);color:var(--red);font-size:13px;padding:9px 12px;border-radius:8px;margin-bottom:14px;text-align:left;}
  .demo-hint{margin-top:20px;font-size:11.5px;color:var(--ink-soft);line-height:1.6;border-top:1px dashed var(--border);padding-top:14px;}
  .demo-hint b{color:var(--ink);}

  /* ---------- App shell ---------- */
  .topbar{
    background:var(--white);border-bottom:1px solid var(--border);
    padding:10px 20px;display:flex;align-items:center;gap:12px;
    position:sticky;top:0;z-index:20;
  }
  .topbar img{width:36px;height:36px;}
  .topbar-title{font-weight:800;font-size:14.5px;letter-spacing:.3px;color:var(--green-dark);line-height:1.15;}
  .topbar-title span{display:block;font-weight:600;font-size:10.5px;letter-spacing:1px;color:var(--ink-soft);text-transform:uppercase;}
  .topbar-spacer{flex:1;}
  .role-chip{
    font-size:11px;font-weight:700;padding:3px 9px;border-radius:20px;
    background:var(--green-light);color:var(--green-dark);text-transform:uppercase;letter-spacing:.5px;
  }
  .role-chip.admin{background:#FCEEDB;color:#8A5A0E;}
  .user-name{font-size:13.5px;font-weight:600;}
  .logout-btn{background:none;border:none;color:var(--ink-soft);font-size:12.5px;text-decoration:underline;padding:4px;}

  .tabs{display:flex;gap:4px;padding:10px 20px 0;background:var(--white);border-bottom:1px solid var(--border);overflow-x:auto;}
  .tab{
    padding:10px 14px;font-size:13.5px;font-weight:600;color:var(--ink-soft);
    border:none;background:none;border-bottom:3px solid transparent;white-space:nowrap;
  }
  .tab.active{color:var(--green-dark);border-bottom-color:var(--green);}

  .main{flex:1;max-width:1100px;width:100%;margin:0 auto;padding:22px 18px 60px;}

  .page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:18px;}
  .page-title{font-size:20px;font-weight:800;margin:0 0 2px;}
  .page-desc{font-size:13px;color:var(--ink-soft);margin:0;}

  .card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);}
  .card-pad{padding:20px;}

  /* ---------- Calendar / timeline ---------- */
  .date-nav{display:flex;align-items:center;gap:10px;margin-bottom:16px;flex-wrap:wrap;}
  .date-nav input[type=date]{padding:9px 10px;border:1.5px solid var(--border);border-radius:8px;font-size:14px;}
  .date-nav-btn{width:34px;height:34px;border-radius:8px;border:1.5px solid var(--border);background:#fff;font-size:15px;color:var(--ink);}
  .date-nav-btn:hover{border-color:var(--green);color:var(--green);}
  .today-label{font-size:13px;font-weight:700;color:var(--green-dark);background:var(--green-light);padding:6px 12px;border-radius:20px;}

  .timeline-wrap{display:grid;grid-template-columns:44px 1fr 1fr;gap:0;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:#fff;}
  .tl-room-head{padding:10px 8px;text-align:center;font-weight:800;font-size:13px;color:var(--green-dark);background:var(--green-light);border-left:1px solid var(--border);}
  .tl-corner{background:var(--green-light);}
  .tl-hours{position:relative;border-right:1px solid var(--border);background:#fbfdfc;}
  .tl-hour-label{position:absolute;left:0;right:0;font-size:10px;color:var(--ink-soft);text-align:right;padding-right:6px;transform:translateY(-6px);}
  .tl-room-col{position:relative;border-left:1px solid var(--border);background:repeating-linear-gradient(to bottom, transparent, transparent 39px, #eef4f0 39px, #eef4f0 40px);}
  .tl-block{
    position:absolute;left:4px;right:4px;border-radius:7px;padding:5px 7px;overflow:hidden;
    font-size:11px;line-height:1.35;box-shadow:0 1px 3px rgba(0,0,0,0.12);cursor:pointer;border:1.5px solid transparent;
  }
  .tl-block b{display:block;font-size:11.5px;}
  .tl-block .st{background:var(--green);color:#fff;border-color:var(--green-dark);}
  .st.pending{background:var(--amber-bg);color:#7a4d0a;border-color:#e6bd7c;}
  .st.approved{background:var(--green);color:#fff;border-color:var(--green-dark);}
  .st.cancelled{background:#eee;color:#999;text-decoration:line-through;border-color:#ddd;}

  .legend{display:flex;gap:16px;margin-top:12px;font-size:12px;color:var(--ink-soft);flex-wrap:wrap;}
  .legend span{display:inline-flex;align-items:center;gap:6px;}
  .dot{width:10px;height:10px;border-radius:3px;display:inline-block;}

  @media (max-width:640px){
    .timeline-wrap{grid-template-columns:34px 1fr;}
    .tl-room-block{grid-column:span 2;}
  }

  /* ---------- Forms ---------- */
  .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
  .form-grid .full{grid-column:1/-1;}
  @media (max-width:600px){.form-grid{grid-template-columns:1fr;}}
  textarea{resize:vertical;min-height:70px;}
  .form-actions{margin-top:18px;display:flex;gap:10px;justify-content:flex-end;}
  .form-msg{margin-bottom:14px;padding:10px 12px;border-radius:8px;font-size:13px;}
  .form-msg.error{background:var(--red-bg);color:var(--red);}
  .form-msg.ok{background:var(--green-light);color:var(--green-dark);}

  /* ---------- Lists / tables ---------- */
  .booking-item{
    display:flex;gap:12px;align-items:flex-start;padding:14px 16px;border-bottom:1px solid var(--border);
  }
  .booking-item:last-child{border-bottom:none;}
  .booking-room-badge{
    width:6px;align-self:stretch;border-radius:4px;background:var(--green);flex:0 0 6px;
  }
  .booking-main{flex:1;min-width:0;}
  .booking-top{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;align-items:center;}
  .booking-room{font-weight:800;font-size:14px;}
  .booking-time{font-size:12.5px;color:var(--ink-soft);font-weight:600;}
  .booking-meta{font-size:13px;color:var(--ink-soft);margin-top:4px;line-height:1.5;}
  .booking-note{font-size:12.5px;color:var(--ink);background:var(--green-pale);border-radius:7px;padding:7px 10px;margin-top:7px;}
  .status-badge{font-size:11px;font-weight:700;padding:3px 10px;border-radius:20px;text-transform:uppercase;letter-spacing:.4px;}
  .status-badge.pending{background:var(--amber-bg);color:#7a4d0a;}
  .status-badge.approved{background:var(--green-light);color:var(--green-dark);}
  .status-badge.cancelled{background:#eee;color:#888;}
  .booking-actions{display:flex;gap:8px;margin-top:10px;}

  .filter-row{display:flex;gap:10px;margin-bottom:14px;flex-wrap:wrap;}
  .filter-row select, .filter-row input{padding:8px 10px;border:1.5px solid var(--border);border-radius:8px;font-size:13px;}

  .empty-state{padding:40px 20px;text-align:center;color:var(--ink-soft);font-size:13.5px;}
  .empty-state .em-icon{font-size:30px;margin-bottom:8px;}

  /* ---------- Modal ---------- */
  .modal-backdrop{position:fixed;inset:0;background:rgba(16,36,24,0.45);display:flex;align-items:center;justify-content:center;z-index:100;padding:16px;}
  .modal{background:#fff;border-radius:14px;max-width:460px;width:100%;padding:24px;box-shadow:var(--shadow-lg);max-height:90vh;overflow:auto;}
  .modal h3{margin:0 0 14px;font-size:16px;}
  .modal-close{float:right;background:none;border:none;font-size:18px;color:var(--ink-soft);}