:root{
  --paper:#F7F5F1;      /* overall light background — also the banner background */
  --ink:#424241;        /* text */
  --accent:#DD882E;     /* buttons / icons / brand accent */
  --card:#FFFFFF;
  --line:rgba(66,66,65,0.14);
  --line-soft:rgba(66,66,65,0.08);
  --ink-soft:rgba(66,66,65,0.65);
  --ink-faint:rgba(66,66,65,0.45);
  --shadow:rgba(66,66,65,0.10);
}
*{box-sizing:border-box;}
html,body{height:100%;}
body{margin:0; background:var(--paper); color:var(--ink); font-family:'Source Serif 4', Georgia, 'Iowan Old Style', serif; -webkit-font-smoothing:antialiased;}
.mono{font-family:'Special Elite','Courier New', ui-monospace, monospace;}
#app{min-height:100vh;}
button{font-family:inherit;}
input,select,textarea{font-family:'Source Serif 4', Georgia, serif;}

/* ---------- Login ---------- */
.center-screen{min-height:100vh; display:flex; align-items:center; justify-content:center; padding:32px; background:var(--paper);}
.panel{background:var(--card); width:100%; max-width:440px; padding:44px 40px 36px; border-radius:6px; box-shadow:0 16px 40px var(--shadow); border-top:4px solid var(--accent);}
.panel .logo-row{display:flex; align-items:center; justify-content:center; margin-bottom:22px;}
.panel .logo-img{max-height:52px; width:auto;}
.panel .logo-fallback{font-family:'Special Elite',monospace; font-size:1.15rem; letter-spacing:.04em; color:var(--ink);}
.brandmark{font-family:'Special Elite', monospace; letter-spacing:.14em; text-transform:uppercase; font-size:.7rem; color:var(--accent); margin-bottom:6px; text-align:center;}
h1.title{font-size:1.75rem; margin:0 0 6px; line-height:1.15; color:var(--ink); text-align:center;}
p.subtitle{color:var(--ink-soft); margin:0 0 24px; font-size:.95rem; line-height:1.5; text-align:center;}
.field{margin-bottom:16px;}
.field label{display:block; font-size:.76rem; letter-spacing:.05em; text-transform:uppercase; color:var(--ink-soft); margin-bottom:6px; font-family:'Special Elite',monospace;}
.field input, .field select, .field textarea{width:100%; padding:10px 12px; border:1px solid var(--line); border-radius:4px; background:#fff; font-size:1rem; color:var(--ink);}
.field textarea{resize:vertical; min-height:64px; font-family:'Source Serif 4', Georgia, serif;}
.field input:focus, .field select:focus, .field textarea:focus{outline:2px solid var(--accent); outline-offset:1px;}
.field-row{display:flex; gap:12px;}
.field-row .field{flex:1;}
.field-hint{font-size:.74rem; color:var(--ink-faint); margin-top:4px;}

.btn{display:inline-flex; align-items:center; justify-content:center; gap:8px; padding:10px 18px; border-radius:4px; border:1px solid var(--accent); background:var(--accent); color:#fff; cursor:pointer; font-size:.92rem; letter-spacing:.02em; transition:opacity .12s ease, transform .12s ease;}
.btn:hover{opacity:.88; transform:translateY(-1px);}
.btn:active{transform:translateY(0);}
.btn.ghost{background:transparent; color:var(--ink); border-color:var(--line);}
.btn.ghost:hover{background:var(--line-soft); opacity:1;}
.btn.danger{background:#fff; color:var(--ink); border-color:var(--line);}
.btn.danger:hover{background:var(--line-soft); opacity:1;}
.btn.wide{width:100%;}
.btn:disabled{opacity:.45; cursor:not-allowed; transform:none;}
.btn-row{display:flex; gap:10px; margin-top:6px; flex-wrap:wrap;}
.error-msg{background:rgba(221,136,46,0.10); border:1px solid rgba(221,136,46,0.4); color:#9a5f1c; padding:9px 12px; border-radius:4px; font-size:.85rem; margin-bottom:14px;}
.hint-note{font-size:.8rem; color:var(--ink-faint); margin-top:18px; line-height:1.5; text-align:center;}

/* ---------- Top banner + app shell ---------- */
.app-shell{min-height:100vh; background:var(--paper);}
.topbar{position:sticky; top:0; z-index:20; background:var(--paper); border-bottom:1px solid var(--line); display:flex; align-items:center; gap:22px; padding:12px 28px; flex-wrap:wrap;}
.topbar-brand{display:flex; align-items:center; gap:10px; flex-shrink:0;}
.topbar-brand .logo-img{height:34px; width:auto; display:block;}
.topbar-brand .logo-fallback{font-family:'Special Elite',monospace; font-size:1rem; letter-spacing:.03em; color:var(--ink); display:none;}
.topnav{display:flex; gap:2px; flex-wrap:wrap; margin-right:auto;}
.topnav button{all:unset; cursor:pointer; padding:9px 11px; font-size:.87rem; color:var(--ink-soft); border-bottom:2px solid transparent; display:flex; align-items:center; gap:6px; white-space:nowrap;}
.topnav button .num{font-family:'Special Elite',monospace; font-size:.63rem; color:var(--ink-faint);}
.topnav button:hover{color:var(--ink);}
.topnav button.active{color:var(--accent); border-bottom-color:var(--accent); font-weight:600;}
.topnav button.active .num{color:var(--accent);}
.topbar-actions{display:flex; align-items:center; gap:14px; flex-shrink:0;}
.sync-status{font-size:.72rem; color:var(--ink-faint); display:flex; align-items:center; gap:6px;}
.sync-status .dot{width:6px; height:6px; border-radius:50%; background:#7fae8a;}
.sync-status.busy .dot{background:var(--accent); animation:pulse 1s infinite;}
.sync-status.err .dot{background:#b3492f;}
@keyframes pulse{0%,100%{opacity:1;}50%{opacity:.3;}}

.main-content{padding:32px 32px 60px; max-width:1180px; margin:0 auto;}
.content-header{margin-bottom:24px; display:flex; align-items:flex-end; justify-content:space-between; gap:20px; flex-wrap:wrap;}
.content-header h2{font-size:1.5rem; margin:0 0 4px; color:var(--ink);}
.content-header p{margin:0; color:var(--ink-soft); font-size:.9rem;}
.eyebrow{font-family:'Special Elite',monospace; font-size:.68rem; letter-spacing:.12em; text-transform:uppercase; color:var(--accent); margin-bottom:6px;}

/* ---------- Dashboard ---------- */
.dash-grid{display:grid; grid-template-columns:1fr 1fr; gap:22px;}
@media (max-width:920px){ .dash-grid{grid-template-columns:1fr;} }
.shelf{background:var(--card); border:1px solid var(--line); border-radius:6px; padding:18px 18px 6px;}
.shelf h3{margin:0 0 2px; font-size:1.05rem; color:var(--ink); display:flex; align-items:center; gap:10px;}
.shelf .count-badge{font-family:'Special Elite',monospace; font-size:.7rem; background:var(--ink); color:#fff; padding:2px 9px; border-radius:10px;}
.shelf.overdue .count-badge{background:var(--accent);}
.shelf p.shelf-desc{color:var(--ink-soft); font-size:.8rem; margin:4px 0 16px;}
.empty-note{color:var(--ink-faint); font-size:.85rem; padding:14px 4px 22px; font-style:italic;}

.ledger-card{background:var(--card); border:1px solid var(--line); border-left:3px solid var(--accent); border-radius:4px; padding:14px 16px; margin-bottom:12px; position:relative;}
.ledger-card .lc-id{font-family:'Special Elite',monospace; font-size:.66rem; color:var(--ink-faint); margin-bottom:4px;}
.ledger-card h4{margin:0 44px 3px 0; font-size:.98rem; color:var(--ink);}
.ledger-card .lc-author{font-size:.8rem; color:var(--ink-soft); margin-bottom:8px;}
.ledger-card .lc-meta{font-size:.78rem; color:var(--ink-soft); display:flex; gap:14px; flex-wrap:wrap;}
.ledger-card .lc-actions{margin-top:10px; display:flex; gap:8px;}
.ledger-card .lc-actions .btn{padding:6px 12px; font-size:.76rem;}

.badge{display:inline-block; padding:2px 9px; border-radius:9px; font-size:.68rem; font-family:'Special Elite',monospace; letter-spacing:.03em; text-transform:uppercase; border:1px solid currentColor;}
.badge.overdue{background:var(--accent); border-color:var(--accent); color:#fff;}
.badge.due-soon{color:var(--accent); border-color:var(--accent);}
.badge.borrowed{color:var(--ink); border-color:var(--line);}
.badge.returned{color:var(--ink-faint); border-color:var(--line-soft);}
.ledger-card .stamp{position:absolute; top:14px; right:14px;}

/* ---------- Book cards / catalogue ---------- */
.book-grid{display:grid; grid-template-columns:repeat(auto-fill,minmax(260px,1fr)); gap:16px;}
.book-card{background:var(--card); border:1px solid var(--line); border-radius:6px; padding:16px 18px;}
.book-card h4{margin:0 0 2px; font-size:1rem; color:var(--ink);}
.book-card .bc-author{font-size:.82rem; color:var(--ink-soft); margin-bottom:6px;}
.book-card .bc-meta{font-size:.76rem; color:var(--ink-faint); margin-bottom:10px; display:flex; flex-wrap:wrap; gap:8px;}
.book-card .bc-desc{font-size:.8rem; color:var(--ink-soft); margin-bottom:10px; line-height:1.4; max-height:3.6em; overflow:hidden;}
.copies-pill{display:inline-flex; align-items:center; gap:5px; font-size:.72rem; font-family:'Special Elite',monospace; padding:3px 9px; border-radius:10px; border:1px solid var(--line); color:var(--ink-soft);}
.copies-pill.full{border-color:var(--accent); color:var(--accent);}
.book-card .bc-actions{display:flex; gap:8px; flex-wrap:wrap; margin-top:6px;}
.book-card .bc-actions .btn{padding:6px 11px; font-size:.76rem;}

/* ---------- Tables ---------- */
.table-wrap{background:var(--card); border:1px solid var(--line); border-radius:6px; overflow:hidden; overflow-x:auto;}
table{width:100%; border-collapse:collapse;}
thead th{text-align:left; font-family:'Special Elite',monospace; font-size:.66rem; letter-spacing:.08em; text-transform:uppercase; color:var(--ink-soft); background:var(--paper); padding:11px 14px; border-bottom:1px solid var(--line); white-space:nowrap;}
tbody td{padding:12px 14px; border-bottom:1px solid var(--line-soft); font-size:.88rem; vertical-align:top;}
tbody tr:last-child td{border-bottom:none;}
tbody tr:hover{background:rgba(221,136,46,0.05);}
.row-actions{display:flex; gap:6px; flex-wrap:wrap;}
.row-actions .btn{padding:5px 10px; font-size:.74rem;}

/* ---------- Forms ---------- */
.form-card{background:var(--card); border:1px solid var(--line); border-radius:6px; padding:24px 26px; max-width:560px;}
.search-bar{display:flex; gap:10px; margin-bottom:22px; max-width:560px;}
.search-bar input{flex:1; padding:11px 14px; border:1px solid var(--line); border-radius:4px; font-size:.95rem;}

.settings-grid{display:grid; grid-template-columns:1fr 1fr 1fr; gap:16px; max-width:640px;}
@media (max-width:700px){.settings-grid{grid-template-columns:1fr;}}
.settings-section{background:var(--card); border:1px solid var(--line); border-radius:6px; padding:22px 24px; max-width:640px; margin-bottom:22px;}
.settings-section h3{margin:0 0 4px; color:var(--ink); font-size:1.02rem;}
.settings-section p.desc{color:var(--ink-soft); font-size:.84rem; margin:0 0 16px;}

/* ---------- Scanner ---------- */
.scanner-wrap{max-width:420px; margin-bottom:18px;}
#scanner-region{border-radius:6px; overflow:hidden; border:1px solid var(--line);}
.scanner-status{font-size:.82rem; color:var(--ink-soft); margin-top:8px; min-height:1.2em;}

/* ---------- Modal ---------- */
.modal-backdrop{position:fixed; inset:0; background:rgba(66,66,65,0.45); display:flex; align-items:center; justify-content:center; z-index:50; padding:20px;}
.modal{background:var(--card); border-radius:6px; padding:26px 28px; max-width:480px; width:100%; box-shadow:0 24px 60px rgba(0,0,0,0.25); max-height:90vh; overflow-y:auto;}
.modal.wide{max-width:640px;}
.modal h3{margin:0 0 18px; color:var(--ink);}
.modal .btn-row{justify-content:flex-end;}
.borrower-row{display:flex; align-items:center; justify-content:space-between; gap:10px; padding:10px 0; border-bottom:1px solid var(--line-soft);}
.borrower-row:last-child{border-bottom:none;}
.borrower-row .br-name{font-size:.9rem; color:var(--ink);}
.borrower-row .br-meta{font-size:.76rem; color:var(--ink-soft);}

.empty-state{text-align:center; padding:56px 20px; color:var(--ink-faint); font-style:italic; background:var(--card); border:1px solid var(--line); border-radius:6px;}

::selection{background:var(--accent); color:#fff;}
a{color:var(--accent);}

@media (max-width:760px){
  .topbar{padding:12px 16px;}
  .main-content{padding:22px 16px 50px;}
}