:root{
  --bg:#f3efe5;
  --paper:#fffdf8;
  --ink:#1f2a2e;
  --muted:#64706e;
  --line:#d8d2c4;
  --accent:#006d68;
  --accent-dark:#07534f;
  --brass:#b7791f;
  --mist:#e4eeea;
}
*{box-sizing:border-box}
body{font-family:Manrope,sans-serif;background-color:var(--bg);background-image:linear-gradient(90deg,rgba(31,42,46,.035) 1px,transparent 1px),linear-gradient(rgba(31,42,46,.035) 1px,transparent 1px),repeating-linear-gradient(0deg,rgba(183,121,31,.07) 0 2px,transparent 2px 76px),radial-gradient(circle at 12% 8%,rgba(0,109,104,.11),transparent 25rem),radial-gradient(circle at 88% 90%,rgba(183,121,31,.13),transparent 28rem);background-size:24px 24px,24px 24px,100% 76px,auto,auto;background-attachment:fixed;margin:0;padding:40px;color:var(--ink);min-width:320px}
.container{max-width:1040px;margin:0 auto;padding:0}
.app-header{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:4px 4px 22px;border-bottom:1px solid var(--ink)}
.brand-lockup{display:flex;align-items:center;gap:13px;min-width:0}
.brand-mark{display:grid;place-items:center;width:48px;height:48px;flex:0 0 48px;background:var(--accent);color:#fff;border:1px solid var(--accent-dark);border-radius:5px;box-shadow:4px 4px 0 rgba(183,121,31,.46)}
.brand-mark svg{width:26px;height:26px;stroke-width:1.8}
h1{margin:0;font-family:Fraunces,serif;font-weight:700;font-size:2.35rem;line-height:1.1;letter-spacing:0}
.panel{background:var(--paper);padding:22px;border-radius:6px;box-shadow:8px 8px 0 rgba(31,42,46,.09);border:1px solid var(--line);margin-bottom:16px}
.book-form,.import-form{display:flex;gap:12px;align-items:center}
.book-form input{min-width:0}
.book-form select{min-width:8.5rem;flex:0 0 8.5rem}
.book-form button,.import-form button{flex:0 0 auto;white-space:nowrap}
input[type=text],input[type=file],input,.form-control,.form-select{padding:10px 12px;border:1px solid var(--line);border-radius:4px;flex:1;background:#fff;color:var(--ink);box-shadow:none!important}
input[type=text]:focus,input[type=file]:focus,input:focus,.form-control:focus,.form-select:focus{border-color:var(--accent);outline:3px solid rgba(0,109,104,.14)}
button,.btn{background:var(--accent);color:#fff;border:1px solid var(--accent);padding:9px 14px;border-radius:4px;cursor:pointer;font-weight:700;box-shadow:none!important;transition:background-color .16s ease,transform .16s ease,border-color .16s ease}
button:hover,.btn:hover{background:var(--accent-dark);border-color:var(--accent-dark);color:#fff;transform:translateY(-1px)}
button.secondary{background:transparent;color:var(--accent);border:1px solid var(--accent)}
button:disabled{opacity:0.6;cursor:not-allowed}
ul#bookList{list-style:none;padding:0;margin:0}
ul#bookList li{display:flex;justify-content:space-between;align-items:center;padding:10px 12px;border-radius:8px;background:#fbfdff;margin-bottom:8px;border:1px solid #eef2ff}
.meta{font-size:13px;color:var(--muted)}
.controls button{margin-left:8px}
section h2{margin:0 0 10px;font-size:18px}
section h4{font-family:Fraunces,serif;font-weight:600;margin:22px 0 10px;font-size:1.2rem}
.small{font-family:DM Mono,monospace;font-size:.74rem;color:var(--muted);letter-spacing:.02em}

#signInBtn,#signOutBtn{min-width:88px}
#signInBtn{background:transparent;border-color:var(--ink);color:var(--ink)}
#signInBtn:hover{background:var(--ink);color:#fff}
#signOutBtn{background:transparent;border-color:var(--brass);color:#8a5a17}
#signOutBtn:hover{background:var(--brass);border-color:var(--brass);color:#fff}
.nav-tabs{border-bottom:1px solid var(--line);gap:8px}
.nav-tabs .nav-link{border:0;border-bottom:3px solid transparent;border-radius:0;color:var(--muted);font-weight:700;padding:.7rem .95rem}
.nav-tabs .nav-link:hover{border-color:transparent;color:var(--accent)}
.nav-tabs .nav-link.active{background:transparent;border-color:var(--accent);color:var(--accent)}
.tab-content{padding-top:12px}

.dt-center { text-align: center; }
.dataTables_wrapper{font-size:.9rem;color:var(--muted)}
.dataTables_wrapper .dataTables_filter input{max-width:100%;border:1px solid var(--line);border-radius:4px;padding:.42rem .6rem;margin-left:.5rem}
.dataTables_wrapper .dataTables_length select{min-width:4rem;border:1px solid var(--line);border-radius:4px;background:#fff}
.dataTables_wrapper table.dataTable{border-collapse:collapse!important;margin-top:14px!important}
.dataTables_wrapper table.dataTable thead th{background:var(--ink);color:#fff;border:0!important;font-family:DM Mono,monospace;font-size:.7rem;font-weight:500;letter-spacing:.06em;text-transform:uppercase;padding:12px 10px}
.dataTables_wrapper table.dataTable tbody td{border-bottom:1px solid #e7e1d5;padding:12px 10px;color:var(--ink);vertical-align:middle}
.dataTables_wrapper table.dataTable tbody tr{background:transparent!important}
.dataTables_wrapper table.dataTable tbody tr:hover{background:var(--mist)!important}
.dataTables_wrapper table.dataTable tbody tr:nth-child(even){background:#fbf9f3!important}
.dataTables_wrapper table.dataTable tbody tr:nth-child(even):hover{background:var(--mist)!important}
.dataTables_wrapper table.dataTable tbody td:first-child{font-weight:700}
.format-badge{display:inline-block;border-radius:999px;padding:.2rem .5rem;font-family:DM Mono,monospace;font-size:.65rem;letter-spacing:.03em;text-transform:uppercase}
.format-paper{background:#f5e4c8;color:#765017}
.format-digital{background:#dceee9;color:#075c57}
.dataTables_wrapper input[type="checkbox"]{appearance:none;background:#fff;border:1px solid #a6b2ad;border-radius:3px;display:inline-grid;place-content:center;cursor:pointer}
.dataTables_wrapper input[type="checkbox"]::before{content:"";width:.66rem;height:.66rem;transform:scale(0);background:var(--accent);clip-path:polygon(14% 44%,0 59%,37% 100%,100% 16%,85% 0,37% 67%)}
.dataTables_wrapper input[type="checkbox"]:checked{border-color:var(--accent);background:#e2f0ed}
.dataTables_wrapper input[type="checkbox"]:checked::before{transform:scale(1)}
.dataTables_wrapper .dataTables_paginate .paginate_button{min-width:2.4rem;min-height:2.4rem;padding:.5rem .7rem!important;}
.dataTables_wrapper .dataTables_paginate .paginate_button.current,.dataTables_wrapper .dataTables_paginate .paginate_button.current:hover{background:var(--accent)!important;border-color:var(--accent)!important;color:#fff!important}
.dataTables_wrapper .dataTables_paginate .paginate_button:hover{background:var(--mist)!important;border-color:var(--line)!important;color:var(--accent)!important}
.dataTables_wrapper .dataTables_scrollBody{overscroll-behavior-x:contain;}

/* ensure DataTables scroller wrapper uses full width */
.dataTables_wrapper .dataTables_scroll { width: 100%; }

@media (max-width:900px){
  body{padding:24px}
  .panel{padding:16px}
  .dataTables_wrapper .dataTables_filter,
  .dataTables_wrapper .dataTables_length,
  .dataTables_wrapper .dataTables_info,
  .dataTables_wrapper .dataTables_paginate{margin-top:10px}
}

@media (max-width:640px){
  body{padding:16px 12px;background-size:18px 18px,18px 18px,100% 60px,auto,auto;background-attachment:scroll}
  .container{width:100%}
  .app-header{align-items:flex-start}
  .brand-lockup{gap:10px}
  .brand-mark{width:40px;height:40px;flex-basis:40px;box-shadow:3px 3px 0 rgba(183,121,31,.46)}
  .brand-mark svg{width:22px;height:22px}
  h1{font-size:1.8rem;max-width:12rem}
  .panel{padding:12px;margin-top:16px!important;border-radius:5px;box-shadow:4px 4px 0 rgba(31,42,46,.09)}
  .nav-tabs{gap:0;overflow-x:auto;flex-wrap:nowrap;scrollbar-width:thin}
  .nav-tabs .nav-item{flex:0 0 auto}
  .nav-tabs .nav-link{padding:.65rem .8rem;font-size:.9rem;white-space:nowrap}
  .book-form,.import-form{flex-direction:column;align-items:stretch;gap:8px}
  .book-form select{min-width:0;flex:auto}
  .book-form button,.import-form button{width:100%;min-height:44px}
  .import-form input[type=file]{width:100%}
  .dataTables_wrapper .dataTables_filter,
  .dataTables_wrapper .dataTables_length,
  .dataTables_wrapper .dataTables_info,
  .dataTables_wrapper .dataTables_paginate{text-align:left;float:none}
  .dataTables_wrapper .dataTables_filter input{display:block;width:100%;margin:6px 0 0}
  .dataTables_wrapper .dataTables_paginate{white-space:normal}
  .dataTables_wrapper .dataTables_scrollBody{max-height:52vh!important}
  #booksTable{width:100%!important;table-layout:fixed}
  #booksTable th:first-child,#booksTable td:first-child{width:56%!important;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  #booksTable th:nth-child(2),#booksTable td:nth-child(2),
  #booksTable th:nth-child(3),#booksTable td:nth-child(3){width:22%!important;min-width:0!important;padding-left:.2rem!important;padding-right:.2rem!important;font-size:.76rem;white-space:normal}
  #toreadTable th:first-child,#toreadTable td:first-child{max-width:10rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  #booksTable input[type="checkbox"],#toreadTable input[type="checkbox"]{width:1.35rem;height:1.35rem;margin:0}
  .modal-dialog{margin:12px}
  .modal-footer{gap:8px}
  .modal-footer .btn{flex:1;min-height:44px}
  .modal-content{border:1px solid var(--line);border-radius:6px;background:var(--paper)}
  .modal-header{border-bottom-color:var(--line)}
  .modal-footer{border-top-color:var(--line)}
  ul#bookList li{flex-direction:column;align-items:flex-start}
  .controls{margin-top:8px;width:100%}
}