:root{
  --bg:#f5f7fb;
  --panel:#ffffff;
  --text:#152036;
  --muted:#5a6780;
  --line:#dbe3f0;
  --primary:#2d5bff;
  --primary-2:#1e44cc;
  --ok:#17a673;
  --warn:#f59e0b;
  --danger:#e11d48;
  --work:#0ea5e9;
  --shadow:0 10px 30px rgba(19,38,77,.08);
  --r:12px;
}
*{box-sizing:border-box}
body{margin:0;font:14px/1.4 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text)}
h1,h2,h3,h4,p{margin:0}
button,input,select,textarea{font:inherit}

.app{display:grid;grid-template-columns:260px 1fr;min-height:100vh}
.sidebar{background:#0f1a33;color:#e9efff;padding:20px;display:flex;flex-direction:column;gap:20px}
.logo{font-weight:800;letter-spacing:.08em}
.nav{display:grid;gap:8px}
.nav-link,.logout{
  border:1px solid transparent;background:#17264a;color:#e9efff;padding:10px 12px;border-radius:10px;text-align:left;cursor:pointer
}
.nav-link.active,.nav-link:hover,.logout:hover{background:#223562;border-color:#2f4d8f}
.logout{margin-top:auto;background:#331735;border-color:#5e2a61}

.content{display:flex;flex-direction:column}
.header{
  background:var(--panel);border-bottom:1px solid var(--line);padding:14px 20px;display:flex;justify-content:space-between;align-items:center;gap:16px
}
.header-left{display:flex;align-items:center;gap:12px}
.header h1{font-size:16px}
.header-right{display:flex;align-items:center;gap:12px}
.system-status{padding:6px 10px;border-radius:999px;background:#e6fbf3;color:#067a53;font-weight:600}
.avatar{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:#dbe6ff;color:#254ab3;font-weight:700}
.menu-btn{display:none;border:1px solid var(--line);background:#fff;border-radius:8px;padding:6px 10px;cursor:pointer}

.main{padding:20px}
.section{display:none}
.section.active{display:block}
.section h2{margin-bottom:14px;font-size:20px}

.form,.table-wrap,.stats,.equipment-grid,.modal-panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow)}
.form{padding:16px}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
label{display:grid;gap:6px;color:var(--muted);font-weight:600}
.full{grid-column:1/-1}
input,select,textarea{
  width:100%;background:#fff;color:var(--text);border:1px solid var(--line);border-radius:10px;padding:10px
}
textarea{resize:vertical}
.upload-wrap{margin-top:12px;display:grid;gap:8px}
.drop-zone{
  border:2px dashed #9db3ea;background:#f7faff;border-radius:12px;padding:20px;text-align:center;color:var(--muted)
}
.drop-zone.dragover{background:#eaf0ff;border-color:var(--primary)}
.link-btn{background:none;border:0;color:var(--primary);padding:0;cursor:pointer}
.file-list{list-style:none;padding:0;margin:0;display:grid;gap:6px}
.file-item{display:flex;justify-content:space-between;align-items:center;border:1px solid var(--line);border-radius:8px;padding:8px 10px;background:#fff}
.file-item button{border:0;background:#ffe5ec;color:#a10f32;padding:5px 8px;border-radius:7px;cursor:pointer}
.primary{
  margin-top:14px;border:0;background:var(--primary);color:#fff;padding:11px 14px;border-radius:10px;cursor:pointer;font-weight:700
}
.primary:hover{background:var(--primary-2)}

.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;padding:12px;margin-bottom:14px}
.card{background:#f8faff;border:1px solid var(--line);border-radius:10px;padding:12px;display:grid;gap:4px}
.card span{color:var(--muted)}
.card strong{font-size:20px}

.table-wrap{padding:10px;overflow:auto}
table{width:100%;border-collapse:collapse;min-width:680px}
th,td{padding:10px;border-bottom:1px solid var(--line);text-align:left}
th{color:var(--muted);font-weight:700}
.badge{padding:4px 8px;border-radius:999px;font-weight:700;font-size:12px}
.open{background:#fde8ef;color:var(--danger)}
.working{background:#e6f7ff;color:#0369a1}
.solved{background:#e6fbf3;color:var(--ok)}
.view-ticket{border:1px solid var(--line);background:#fff;border-radius:8px;padding:6px 10px;cursor:pointer}
.view-ticket:hover{border-color:#b8c6e2}

.equipment-grid{padding:12px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
.equipment-card{border:1px solid var(--line);border-radius:10px;padding:12px;display:grid;gap:6px;background:#fdfefe}
.report-btn{margin-top:6px;border:0;background:#eef3ff;color:#1d3d9b;border-radius:8px;padding:8px 10px;cursor:pointer;font-weight:700}

.modal{
  position:fixed;inset:0;background:rgba(8,13,25,.55);display:none;align-items:center;justify-content:center;padding:20px
}
.modal.show{display:flex}
.modal-panel{position:relative;max-width:860px;width:100%;padding:16px}
.close-btn{
  position:absolute;right:12px;top:8px;border:0;background:none;font-size:24px;cursor:pointer;color:#44506a
}
.modal-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:10px}
.timeline{margin:0;padding-left:18px;display:grid;gap:8px}
.timeline li{color:#32415f}
.chat{border:1px solid var(--line);border-radius:10px;padding:10px;display:grid;gap:8px;max-height:260px;overflow:auto}
.msg{padding:8px 10px;border-radius:9px;max-width:90%}
.msg.tech{background:#edf2ff}
.msg.client{background:#e7fbf3;justify-self:end}

@media (max-width:1100px){
  .equipment-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:860px){
  .app{grid-template-columns:1fr}
  .sidebar{position:fixed;left:-280px;top:0;bottom:0;width:260px;z-index:20;transition:left .2s}
  .sidebar.open{left:0}
  .menu-btn{display:inline-block}
  .grid-2,.stats,.modal-grid{grid-template-columns:1fr}
}

.flash-success{background:#e6fbf3;color:#067a53;border:1px solid #b6ecd8;border-radius:var(--r);padding:12px 14px;margin-bottom:14px;font-weight:600}
.flash-error{background:#fde8ef;color:var(--danger);border:1px solid #f7c2d2;border-radius:var(--r);padding:12px 14px;margin-bottom:14px;font-weight:600}
.flash-error ul{margin:0;padding-left:18px}
.empty-row{color:var(--muted);text-align:center;padding:16px}
.attachment-item{display:block;padding:8px 10px;border:1px solid var(--line);border-radius:8px;color:var(--primary);text-decoration:none}
.attachment-item:hover{background:#f7faff}