:root{
  --primary:#3F4EE0;
  --primary-dark:#2C3899;
  --primary-light:#EEF0FD;
  --bg:#F4F6FB;
  --card:#FFFFFF;
  --text:#1E2135;
  --text-soft:#8C90A6;
  --border:#E7E9F3;
  --teal:#17C3A2;
  --pink:#F04393;
  --purple:#8B5CF6;
  --danger:#E5484D;
  --radius:12px;
}
*{box-sizing:border-box;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  font-size:14px;
}
a{color:inherit;text-decoration:none;}
h1,h2,h3{margin:0;}

/* ---------- App shell ---------- */
.app{
  display:grid;
  grid-template-columns:230px 1fr;
  min-height:100vh;
}
.sidebar{
  background:var(--card);
  border-right:1px solid var(--border);
  padding:22px 16px;
  position:sticky;
  top:0;
  height:100vh;
  display:flex;
  flex-direction:column;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  padding:0 8px 24px;
  font-weight:700;
  font-size:19px;
  color:var(--primary-dark);
}
.brand .dot{
  width:10px;height:10px;border-radius:3px;
  background:var(--primary);
}
.nav{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:2px;flex:1;}
.nav li a{
  display:flex;
  align-items:center;
  gap:12px;
  padding:11px 12px;
  border-radius:9px;
  color:var(--text-soft);
  font-weight:500;
  font-size:14px;
}
.nav li a svg{width:18px;height:18px;flex-shrink:0;}
.nav li a:hover{background:var(--primary-light);color:var(--primary-dark);}
.nav li a.active{background:var(--primary);color:#fff;}
.nav li a.active svg{stroke:#fff;}
.sidebar-foot{
  border-top:1px solid var(--border);
  padding-top:14px;
  margin-top:14px;
}
.sidebar-foot .user{
  display:flex;align-items:center;gap:10px;
  padding:8px;
}
.avatar{
  width:34px;height:34px;border-radius:50%;
  background:var(--primary);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-weight:600;font-size:13px;flex-shrink:0;
}
.user-meta{line-height:1.3;}
.user-meta .name{font-weight:600;font-size:13px;}
.user-meta .role{font-size:12px;color:var(--text-soft);}
.logout-link{display:block;margin-top:10px;font-size:13px;color:var(--danger);padding:8px;border-radius:8px;}
.logout-link:hover{background:#FDECEC;}

.main{min-width:0;}
.topbar{
  display:flex;
  align-items:center;
  gap:16px;
  padding:16px 26px;
  background:var(--card);
  border-bottom:1px solid var(--border);
  position:sticky;top:0;z-index:20;
}
.hamburger{
  display:none;
  background:none;border:none;cursor:pointer;
  width:36px;height:36px;
  align-items:center;justify-content:center;
  border-radius:8px;
}
.hamburger:hover{background:var(--primary-light);}
.hamburger span{display:block;width:18px;height:2px;background:var(--text);position:relative;}
.hamburger span::before,.hamburger span::after{
  content:'';position:absolute;left:0;width:18px;height:2px;background:var(--text);
}
.hamburger span::before{top:-6px;}
.hamburger span::after{top:6px;}
.search-box{
  flex:1;max-width:360px;
  display:flex;align-items:center;gap:8px;
  background:var(--bg);
  border:1px solid var(--border);
  border-radius:9px;
  padding:9px 12px;
}
.search-box input{
  border:none;background:none;outline:none;flex:1;font-size:13px;color:var(--text);
}
.search-box svg{width:16px;height:16px;stroke:var(--text-soft);flex-shrink:0;}
.topbar-spacer{flex:1;}
.page-title{font-size:19px;font-weight:700;}

.content{padding:26px;}

/* ---------- Cards / stats ---------- */
.stat-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:16px;
  margin-bottom:22px;
}
@media (max-width:1000px){.stat-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:560px){.stat-grid{grid-template-columns:1fr;}}
.stat-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:18px 20px;
}
.stat-card .lbl{font-size:12px;color:var(--text-soft);margin-bottom:6px;}
.stat-card .val{font-size:22px;font-weight:700;}
.stat-card .sub{font-size:12px;margin-top:6px;}
.stat-card .sub.up{color:var(--teal);}
.stat-card .sub.down{color:var(--danger);}

.panel-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr;
  gap:18px;
}
@media (max-width:960px){.panel-grid{grid-template-columns:1fr;}}

.panel{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:20px;
}
.panel-head{
  display:flex;align-items:center;justify-content:space-between;
  margin-bottom:16px;
}
.panel-head h3{font-size:15px;font-weight:700;}
.panel-head a{font-size:13px;color:var(--primary);font-weight:600;}

/* ---------- Table ---------- */
table.data{width:100%;border-collapse:collapse;}
table.data th{
  text-align:left;font-size:11px;color:var(--text-soft);
  text-transform:uppercase;letter-spacing:.03em;
  padding:10px 8px;border-bottom:1px solid var(--border);
}
table.data td{padding:12px 8px;border-bottom:1px solid var(--border);font-size:13.5px;vertical-align:middle;}
table.data tr:last-child td{border-bottom:none;}
table.data tr:hover td{background:var(--bg);}
.badge{
  display:inline-block;padding:4px 10px;border-radius:20px;font-size:11.5px;font-weight:600;
}
.badge.draft{background:#EEF0FD;color:#565FD6;}
.badge.sent{background:#FFF3DC;color:#B4780C;}
.badge.paid{background:#E4F9F1;color:#0E9F6E;}
.row-actions a{color:var(--text-soft);margin-right:10px;font-size:12.5px;font-weight:600;}
.row-actions a:hover{color:var(--primary);}
.row-actions a.danger:hover{color:var(--danger);}

/* ---------- Forms ---------- */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
@media (max-width:700px){.form-grid{grid-template-columns:1fr;}}
.field{margin-bottom:14px;}
.field label{display:block;font-size:12.5px;color:var(--text-soft);margin-bottom:5px;font-weight:500;}
.field input[type=text],
.field input[type=email],
.field input[type=password],
.field input[type=number],
.field input[type=date],
.field input[type=tel],
.field select,
.field textarea{
  width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:8px;
  font-family:inherit;font-size:13.5px;background:#fff;color:var(--text);
}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--primary);}
.field textarea{resize:vertical;min-height:70px;}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 18px;border-radius:9px;border:none;cursor:pointer;
  font-size:13.5px;font-weight:600;font-family:inherit;
}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-dark);}
.btn-outline{background:#fff;color:var(--text);border:1px solid var(--border);}
.btn-outline:hover{border-color:var(--primary);color:var(--primary);}
.btn-danger{background:#fff;color:var(--danger);border:1px solid #F6CACB;}
.btn-danger:hover{background:#FDECEC;}
.btn-sm{padding:7px 12px;font-size:12.5px;}
.btn-block{width:100%;}

/* item rows in invoice form */
.item-row{
  display:grid;grid-template-columns:1fr 70px 100px 100px 30px;
  gap:8px;align-items:center;margin-bottom:8px;
}
.item-row input{padding:8px 9px;font-size:13px;}
.item-head{
  display:grid;grid-template-columns:1fr 70px 100px 100px 30px;
  gap:8px;font-size:11px;color:var(--text-soft);margin-bottom:6px;padding:0 2px;
}
@media (max-width:600px){
  .item-row,.item-head{grid-template-columns:1fr 46px 70px 70px 24px;}
}
.rm-btn{background:none;border:none;color:var(--danger);font-size:18px;cursor:pointer;line-height:1;}
.add-item-btn{
  background:none;border:1px dashed var(--primary);color:var(--primary-dark);
  padding:9px 14px;border-radius:8px;font-size:13px;cursor:pointer;margin-top:4px;width:100%;
}
.add-item-btn:hover{background:var(--primary-light);}

.img-drop{
  border:1px dashed var(--border);border-radius:8px;padding:16px;
  text-align:center;font-size:13px;color:var(--text-soft);cursor:pointer;
}
.img-drop:hover{border-color:var(--primary);}
.img-grid{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px;}
.img-thumb{position:relative;width:60px;height:60px;border-radius:6px;overflow:hidden;border:1px solid var(--border);}
.img-thumb img{width:100%;height:100%;object-fit:cover;display:block;}
.img-thumb button{
  position:absolute;top:0;right:0;background:rgba(30,33,53,.75);color:#fff;
  border:none;width:16px;height:16px;font-size:11px;line-height:1;cursor:pointer;
}

.total-box{
  display:flex;justify-content:flex-end;gap:22px;
  padding-top:14px;margin-top:6px;border-top:2px solid var(--text);
}
.total-box .lbl{font-weight:700;font-size:14px;}
.total-box .val{font-weight:700;font-size:16px;color:var(--primary-dark);}

/* ---------- Login ---------- */
.login-wrap{
  min-height:100vh;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);
  padding:20px;
}
.login-card{
  background:#fff;border-radius:16px;padding:36px 32px;width:100%;max-width:380px;
  box-shadow:0 20px 60px rgba(44,56,153,.35);
}
.login-card .brand{justify-content:center;padding-bottom:8px;}
.login-card p.sub{text-align:center;color:var(--text-soft);font-size:13px;margin:0 0 24px;}
.alert{
  padding:10px 14px;border-radius:8px;font-size:13px;margin-bottom:16px;
}
.alert-error{background:#FDECEC;color:var(--danger);}
.alert-success{background:#E4F9F1;color:#0E9F6E;}

/* ---------- Invoice preview / PDF-like paper ---------- */
.invoice-paper{padding:28px 26px;font-family:'Inter',sans-serif;}
.inv-head{display:flex;justify-content:space-between;align-items:flex-start;border-bottom:2px solid var(--text);padding-bottom:14px;margin-bottom:16px;}
.inv-head .biz{font-weight:700;font-size:18px;}
.inv-head .meta{text-align:right;font-size:12px;color:var(--text-soft);line-height:1.6;}
.inv-sub{font-size:12px;color:var(--text-soft);margin:0 0 16px;}
.inv-work{font-weight:700;font-size:14.5px;margin:0 0 16px;}

/* ---------- misc ---------- */
.empty{padding:40px 10px;text-align:center;color:var(--text-soft);font-size:13.5px;}
.helptext{font-size:12px;color:var(--text-soft);margin-top:4px;}
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--border);margin-bottom:20px;}
.tabs a{padding:10px 16px;font-size:13.5px;font-weight:600;color:var(--text-soft);border-bottom:2px solid transparent;}
.tabs a.active{color:var(--primary);border-color:var(--primary);}

/* ---------- Mobile sidebar ---------- */
@media (max-width:880px){
  .app{grid-template-columns:1fr;}
  .sidebar{
    position:fixed;left:0;top:0;z-index:50;width:230px;
    transform:translateX(-100%);transition:transform .2s ease;
    box-shadow:0 0 0 9999px rgba(0,0,0,0);
  }
  .sidebar.open{transform:translateX(0);box-shadow:0 0 0 9999px rgba(20,22,40,.45);}
  .hamburger{display:flex;}
  .content{padding:18px;}
  .topbar{padding:14px 16px;}
}