@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600;700&family=IBM+Plex+Sans:wght@400;500;600;700&display=swap');

:root{
  --bg:#EEF2F3;
  --surface:#FFFFFF;
  --surface-2:#E4EBEE;
  --ink:#152430;
  --ink-dim:#5B6B76;
  --ink-faint:#8B9AA3;
  --primary:#1B4B66;
  --primary-dark:#0F3245;
  --primary-tint:#E6EEF1;
  --accent:#E8622C;
  --accent-tint:#FCE7DD;
  --border:#D9E1E5;
  --success:#2F8F5B;
  --success-tint:#E4F3EA;
  --danger:#C1432A;
  --danger-tint:#FBE7E1;
  --radius:10px;
  --font-mono:'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --font-sans:'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --shadow-sm:0 1px 2px rgba(15,50,69,.06);
  --shadow-md:0 6px 20px rgba(15,50,69,.12);
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  font-family:var(--font-sans);
  background:var(--bg);
  color:var(--ink);
  font-size:14px;
  line-height:1.5;
}
button{font-family:inherit;font-size:inherit;cursor:pointer;}
input{font-family:inherit;font-size:inherit;}
::selection{background:var(--accent-tint);}

/* ---------- App shell ---------- */
#app{display:flex;flex-direction:column;height:100vh;}

.topbar{
  display:flex;align-items:center;gap:14px;
  padding:0 20px;height:60px;flex:0 0 auto;
  background:var(--primary-dark);color:#fff;
  box-shadow:var(--shadow-md);position:relative;z-index:20;
}
.topbar .brand{display:flex;align-items:center;gap:10px;margin-right:8px;}
.topbar .brand-mark{
  width:32px;height:32px;border-radius:8px;background:var(--accent);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-mono);font-weight:700;color:#fff;font-size:15px;
  flex:0 0 auto;
}
.topbar .brand-text{font-family:var(--font-mono);font-weight:600;font-size:15px;letter-spacing:.02em;}
.topbar .brand-text small{display:block;font-weight:400;font-size:10.5px;color:#9FC0D1;letter-spacing:.04em;text-transform:uppercase;margin-top:1px;}
.topbar .spacer{flex:1;}
.topbar .tb-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap;justify-content:flex-end;}
.tb-btn{
  display:flex;align-items:center;gap:6px;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);
  color:#EAF2F5;padding:8px 12px;border-radius:8px;font-size:12.5px;font-weight:500;
  transition:background .15s;white-space:nowrap;
}
.tb-btn:hover{background:rgba(255,255,255,.18);}
.tb-btn.tb-primary{background:var(--accent);border-color:var(--accent);color:#fff;}
.tb-btn.tb-primary:hover{background:#d4551f;}
.tb-btn .count{
  background:rgba(255,255,255,.25);border-radius:20px;padding:0 7px;font-family:var(--font-mono);font-size:11px;
}
.tb-btn.tb-primary .count{background:rgba(255,255,255,.3);}

.body-row{flex:1;display:flex;min-height:0;}

/* ---------- Sidebar ---------- */
.sidebar{
  width:270px;flex:0 0 auto;background:var(--surface);border-right:1px solid var(--border);
  display:flex;flex-direction:column;overflow-y:auto;
}
.mfr-switch{display:flex;gap:0;padding:14px 14px 10px;border-bottom:1px solid var(--border);}
.mfr-btn{
  flex:1;padding:9px 6px;text-align:center;font-size:12px;font-weight:600;
  border:1px solid var(--border);background:var(--surface-2);color:var(--ink-dim);
}
.mfr-btn:first-child{border-radius:8px 0 0 8px;border-right:none;}
.mfr-btn:last-child{border-radius:0 8px 8px 0;}
.mfr-btn.active{background:var(--primary);border-color:var(--primary);color:#fff;}

.sidebar-section-label{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--ink-faint);padding:16px 16px 6px;
}
.nav-list{display:flex;flex-direction:column;padding:0 10px;gap:2px;}
.nav-item{
  display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:8px;
  color:var(--ink);text-align:left;background:transparent;border:none;font-size:13px;font-weight:500;
}
.nav-item:hover{background:var(--surface-2);}
.nav-item.active{background:var(--primary-tint);color:var(--primary-dark);font-weight:600;}
.nav-item .dot{width:6px;height:6px;border-radius:50%;background:var(--ink-faint);flex:0 0 auto;}
.nav-item.active .dot{background:var(--accent);}

.sidebar-footer{margin-top:auto;padding:14px 16px;border-top:1px solid var(--border);}
.calc-launch{
  width:100%;padding:10px;border-radius:8px;border:1px dashed var(--border);background:var(--surface-2);
  font-size:12.5px;font-weight:600;color:var(--ink-dim);display:flex;align-items:center;justify-content:center;gap:8px;
}
.calc-launch:hover{border-color:var(--primary);color:var(--primary);}

/* ---------- Main ---------- */
.main{flex:1;overflow-y:auto;padding:26px 32px 60px;}
.breadcrumb{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--ink-dim);margin-bottom:6px;font-family:var(--font-mono);}
.breadcrumb .sep{color:var(--ink-faint);}
.screen-header{display:flex;align-items:baseline;gap:12px;margin-bottom:22px;flex-wrap:wrap;}
.screen-header h1{font-size:22px;margin:0;font-weight:700;letter-spacing:-.01em;}
.back-btn{
  border:1px solid var(--border);background:var(--surface);border-radius:7px;padding:6px 11px;font-size:12px;
  color:var(--ink-dim);font-weight:600;display:inline-flex;align-items:center;gap:5px;
}
.back-btn:hover{border-color:var(--primary);color:var(--primary);}

/* Tile grid (category navigation) */
.tile-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px;}
.tile{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:20px 18px;text-align:left;box-shadow:var(--shadow-sm);
  display:flex;flex-direction:column;gap:10px;min-height:100px;
  transition:transform .12s, box-shadow .12s, border-color .12s;
}
.tile:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--primary);}
.tile .tile-icon{
  width:34px;height:34px;border-radius:8px;background:var(--primary-tint);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-family:var(--font-mono);font-weight:700;
}
.tile .tile-label{font-weight:600;font-size:14px;line-height:1.35;}
.tile .tile-arrow{margin-top:auto;font-size:12px;color:var(--accent);font-weight:600;}

/* Product grid */
.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:14px;}
.card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:16px;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;gap:10px;
}
.card .card-title{font-weight:600;font-size:13.5px;line-height:1.4;}
.card .img-placeholder{
  width:100%;height:110px;border:1px dashed var(--border);border-radius:8px;
  background:var(--surface-2);color:var(--ink-faint);font-size:11px;font-weight:600;
  display:flex;align-items:center;justify-content:center;text-align:center;
}
.card .bundle{font-size:11.5px;color:var(--ink-dim);border-left:2px solid var(--border);padding-left:9px;line-height:1.6;}
.card .bundle b{color:var(--ink);font-weight:600;}
.card .card-foot{display:flex;align-items:center;gap:8px;margin-top:auto;padding-top:4px;}
.qty-input{
  width:60px;padding:7px 8px;border:1px solid var(--border);border-radius:7px;font-family:var(--font-mono);
  text-align:center;font-size:13px;
}
.qty-input:focus{outline:none;border-color:var(--primary);}
.add-btn{
  flex:1;background:var(--primary);color:#fff;border:none;border-radius:7px;padding:8px 10px;
  font-size:12.5px;font-weight:600;display:flex;align-items:center;justify-content:center;gap:6px;
}
.add-btn:hover{background:var(--primary-dark);}
.fixed-note{font-family:var(--font-mono);font-size:11px;color:var(--ink-faint);}

/* ---------- Devis view ---------- */
.devis-toolbar{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px;}
.dv-btn{
  border:1px solid var(--border);background:var(--surface);color:var(--ink);border-radius:8px;
  padding:9px 13px;font-size:12.5px;font-weight:600;display:inline-flex;align-items:center;gap:7px;
}
.dv-btn:hover{border-color:var(--primary);color:var(--primary);}
.dv-btn.danger:hover{border-color:var(--danger);color:var(--danger);}
.dv-btn.primary{background:var(--accent);border-color:var(--accent);color:#fff;}
.dv-btn.primary:hover{background:#d4551f;}

.section-block{margin-bottom:22px;}
.section-title{
  font-family:var(--font-mono);font-size:11.5px;text-transform:uppercase;letter-spacing:.07em;
  color:var(--primary);font-weight:600;margin-bottom:8px;display:flex;align-items:center;gap:8px;
}
.section-title::after{content:"";flex:1;height:1px;background:var(--border);}
table.devis-table{width:100%;border-collapse:collapse;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;}
table.devis-table th{
  text-align:left;font-size:10.5px;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-dim);
  background:var(--surface-2);padding:9px 12px;font-weight:600;
}
table.devis-table td{padding:10px 12px;border-top:1px solid var(--border);font-size:13px;vertical-align:middle;}
table.devis-table tr:hover td{background:#FAFBFC;}
.ref-chip{font-family:var(--font-mono);font-size:11.5px;background:var(--surface-2);padding:2px 7px;border-radius:5px;color:var(--ink-dim);white-space:nowrap;}
.qty-chip{font-family:var(--font-mono);font-weight:600;}
.row-del{border:none;background:transparent;color:var(--ink-faint);padding:4px 6px;border-radius:6px;font-size:15px;line-height:1;}
.row-del:hover{color:var(--danger);background:var(--danger-tint);}
.empty-state{
  text-align:center;padding:60px 20px;color:var(--ink-dim);
}
.empty-state .big{font-size:38px;margin-bottom:10px;}
.empty-state .hint{font-size:12.5px;color:var(--ink-faint);margin-top:6px;}

/* ---------- Modal ---------- */
.modal-overlay{
  position:fixed;inset:0;background:rgba(15,35,45,.45);display:flex;align-items:center;justify-content:center;
  z-index:100;padding:20px;
}
.modal{
  background:var(--surface);border-radius:14px;max-width:640px;width:100%;max-height:86vh;overflow-y:auto;
  box-shadow:var(--shadow-md);padding:26px 28px;
}
.modal h2{margin:0 0 4px;font-size:18px;}
.modal .modal-sub{font-size:12.5px;color:var(--ink-dim);margin-bottom:18px;}
.modal label{display:block;font-size:12px;font-weight:600;color:var(--ink-dim);margin:14px 0 5px;}
.modal input[type=text],.modal input[type=email],.modal textarea{
  width:100%;padding:9px 11px;border:1px solid var(--border);border-radius:8px;font-size:13px;
}
.modal textarea{min-height:120px;resize:vertical;font-family:var(--font-mono);font-size:12px;}
.modal-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:22px;}
.modal-close{
  position:absolute;top:16px;right:16px;border:none;background:var(--surface-2);width:28px;height:28px;
  border-radius:50%;font-size:14px;color:var(--ink-dim);
}
.modal{position:relative;}

/* calc form */
.calc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;}
.calc-field label{font-size:11px;}
.calc-field input{width:100%;padding:7px 9px;border:1px solid var(--border);border-radius:7px;font-family:var(--font-mono);font-size:12.5px;}
.calc-block{background:var(--surface-2);border-radius:10px;padding:16px;margin-bottom:16px;}
.calc-block h3{margin:0 0 4px;font-size:13.5px;}
.calc-block .calc-desc{font-size:11.5px;color:var(--ink-dim);margin-bottom:12px;}
.calc-result{margin-top:12px;display:flex;gap:16px;flex-wrap:wrap;}
.calc-result .res{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:8px 14px;}
.calc-result .res .label{font-size:10.5px;color:var(--ink-dim);text-transform:uppercase;letter-spacing:.04em;}
.calc-result .res .val{font-family:var(--font-mono);font-weight:700;font-size:16px;color:var(--primary);}
.calc-btn{background:var(--primary);color:#fff;border:none;border-radius:7px;padding:8px 14px;font-size:12px;font-weight:600;}
.calc-btn:hover{background:var(--primary-dark);}

/* toast */
#toast{
  position:fixed;bottom:22px;left:50%;transform:translateX(-50%) translateY(20px);
  background:var(--ink);color:#fff;padding:11px 18px;border-radius:9px;font-size:13px;font-weight:500;
  box-shadow:var(--shadow-md);opacity:0;pointer-events:none;transition:opacity .2s, transform .2s;z-index:200;
  display:flex;align-items:center;gap:8px;
}
#toast.success{background:var(--success);}
#toast.show{opacity:1;transform:translateX(-50%) translateY(0);}

/* ---------- Print ---------- */
@media print{
  body *{visibility:hidden;}
  .print-area,.print-area *{visibility:visible;}
  .print-area{display:block;position:absolute;top:0;left:0;width:100%;padding:20px;}
  .no-print{display:none !important;}
}
.print-only{display:none;}
.print-area .print-head{display:flex;justify-content:space-between;align-items:flex-end;border-bottom:2px solid #152430;padding-bottom:10px;margin-bottom:18px;}
.print-area .print-head h1{font-size:20px;margin:0;}
.print-area .print-head .meta{font-size:11px;color:#5B6B76;text-align:right;}
.print-area table{width:100%;border-collapse:collapse;margin-bottom:16px;}
.print-area th{text-align:left;font-size:10px;text-transform:uppercase;border-bottom:1px solid #152430;padding:5px 8px;}
.print-area td{font-size:11.5px;padding:5px 8px;border-bottom:1px solid #D9E1E5;}
.print-area .p-section{font-weight:700;font-size:12px;margin:14px 0 4px;}

/* responsive */
@media (max-width:860px){
  .topbar{height:auto;flex-wrap:wrap;padding:10px 14px;gap:10px;row-gap:8px;}
  .topbar .brand{margin-right:auto;}
  .topbar .spacer{display:none;}
  .topbar .tb-actions{width:100%;justify-content:flex-start;overflow-x:auto;flex-wrap:nowrap;padding-bottom:2px;}
  .tb-btn{flex:0 0 auto;}

  .body-row{flex-direction:column;}

  .sidebar{
    width:100%;flex-direction:column;border-right:none;border-bottom:1px solid var(--border);
    max-height:none;overflow-y:visible;
  }
  .mfr-switch{padding:12px 14px;}
  .sidebar-section-label{padding:10px 14px 6px;}
  .nav-list{
    flex-direction:row;flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;
    padding:2px 14px 12px;gap:8px;
  }
  .nav-item{flex:0 0 auto;white-space:nowrap;border:1px solid var(--border);}
  .nav-item.active{border-color:var(--primary);}
  .sidebar-footer{border-top:none;padding:0 14px 14px;}

  .main{padding:18px 14px 50px;}
  .screen-header h1{font-size:19px;}
  .tile-grid,.product-grid{grid-template-columns:1fr;}
  .card-foot{flex-wrap:wrap;}
  .devis-toolbar{gap:6px;}
  .dv-btn{flex:1 1 auto;justify-content:center;}

  table.devis-table{display:block;overflow-x:auto;white-space:nowrap;}

  .calc-grid{grid-template-columns:repeat(2,1fr);}
  .modal{padding:20px 16px;max-height:92vh;}
  .modal-close{top:12px;right:12px;}
}
@media (max-width:480px){
  .brand-text{font-size:13px;}
  .topbar .brand-text small{display:none;}
  .calc-grid{grid-template-columns:1fr 1fr;}
  .tb-btn{font-size:11.5px;padding:7px 10px;}
}
:focus-visible{outline:2px solid var(--accent);outline-offset:1px;}