:root{
  --bg:#f4f6fb;
  --surface:#ffffff;
  --ink:#1b2130;
  --muted:#67718a;
  --border:#e4e8f1;
  --primary:#4f46e5;
  --primary-dark:#4338ca;
  --primary-light:#eef0fe;
  --success:#16a34a;
  --success-light:#eafaf0;
  --danger:#dc2626;
  --danger-light:#fdecec;
  --warn:#d97706;
  --radius:12px;
  --shadow:0 1px 2px rgba(20,20,43,.04), 0 8px 24px rgba(20,20,43,.06);
  --sidebar-w:250px;
}

*{box-sizing:border-box;}
html,body{height:100%;}
body{
  margin:0;
  font-family:"Segoe UI",Inter,-apple-system,BlinkMacSystemFont,Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);
  color:var(--ink);
  -webkit-font-smoothing:antialiased;
}

.hidden{display:none !important;}
.screen{display:none;}
.screen.active{display:block;}

/* ---------- Login ---------- */
#login-screen.active{
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:100vh;
  background:radial-gradient(circle at 20% 20%, #6d63f2 0%, transparent 45%),
             radial-gradient(circle at 80% 80%, #4f46e5 0%, transparent 45%),
             linear-gradient(135deg,#1b2140,#312a6b 60%,#4f46e5);
  padding:20px;
}
.login-card{
  width:100%;
  max-width:380px;
  background:var(--surface);
  border-radius:16px;
  box-shadow:0 20px 60px rgba(15,15,40,.35);
  padding:36px 32px 28px;
}
.login-brand{text-align:center;margin-bottom:22px;}
.login-logo{
  width:56px;height:56px;border-radius:14px;
  background:linear-gradient(135deg,var(--primary),#7c3aed);
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:20px;margin:0 auto 14px;
}
.login-brand h1{margin:0;font-size:22px;}
.login-brand p{margin:4px 0 0;color:var(--muted);font-size:13.5px;}
#login-form label{font-size:13px;font-weight:600;color:var(--muted);display:block;margin:14px 0 6px;}
#login-form input{width:100%;}
.login-hint{margin-top:18px;text-align:center;font-size:12.5px;color:var(--muted);}

/* ---------- Layout ---------- */
#app-shell{display:flex;min-height:100vh;}
.sidebar{
  width:var(--sidebar-w);
  background:linear-gradient(180deg,#1b2140,#232a52);
  color:#fff;
  display:flex;
  flex-direction:column;
  padding:22px 16px;
  position:fixed;
  top:0;left:0;bottom:0;
}
.brand{display:flex;align-items:center;gap:10px;padding:0 6px 22px;border-bottom:1px solid rgba(255,255,255,.1);margin-bottom:18px;}
.brand-logo{
  width:38px;height:38px;border-radius:10px;
  background:linear-gradient(135deg,var(--primary),#7c3aed);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;flex-shrink:0;
}
.brand-title{font-weight:700;font-size:15px;}
.brand-sub{font-size:11.5px;color:#a6adcc;}
.nav{display:flex;flex-direction:column;gap:4px;flex:1;}
.nav-btn{
  display:flex;align-items:center;gap:10px;
  background:transparent;border:none;color:#c7cbe8;
  padding:11px 12px;border-radius:10px;font-size:14px;text-align:left;cursor:pointer;
  transition:background .15s, color .15s;
}
.nav-btn:hover{background:rgba(255,255,255,.06);color:#fff;}
.nav-btn.active{background:var(--primary);color:#fff;}
.nav-icon{font-size:16px;width:20px;text-align:center;}
.logout-btn{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);color:#e6e8f7;
  padding:10px;border-radius:10px;cursor:pointer;font-size:13.5px;
}
.logout-btn:hover{background:rgba(255,255,255,.12);}

.main-content{margin-left:var(--sidebar-w);flex:1;padding:28px 34px 60px;max-width:1180px;}
.view{display:none;}
.view.active{display:block;}
.view-header{margin-bottom:22px;}
.view-header h2{margin:0 0 6px;font-size:22px;}
.view-header p{margin:0;color:var(--muted);font-size:14px;max-width:640px;}

/* ---------- Panels / Cards ---------- */
.panel{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:22px 24px;
  margin-bottom:20px;
}
.panel.narrow{max-width:460px;}
.panel-head{display:flex;align-items:flex-start;justify-content:space-between;gap:14px;margin-bottom:16px;flex-wrap:wrap;}
.panel-head h3{margin:0 0 4px;font-size:16.5px;}
.panel h3{margin:0 0 4px;font-size:16.5px;}
.muted{color:var(--muted);}
.small{font-size:12.5px;}

/* ---------- Forms ---------- */
label{font-size:13px;font-weight:600;color:var(--muted);}
input[type=text],input[type=password],input[type=number],input[type=time],select,input[type=file]{
  width:100%;
  padding:10px 12px;
  border:1px solid var(--border);
  border-radius:9px;
  font-size:14px;
  background:#fbfcfe;
  color:var(--ink);
  outline:none;
  transition:border-color .15s, box-shadow .15s;
}
input:focus,select:focus{
  border-color:var(--primary);
  box-shadow:0 0 0 3px var(--primary-light);
  background:#fff;
}
.field{margin-bottom:14px;display:flex;flex-direction:column;gap:6px;}
.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px 20px;}
.tiers-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));}
.form-section{padding:16px 0;border-top:1px solid var(--border);}
.form-section:first-of-type{border-top:none;padding-top:0;}
.form-section h4{margin:0 0 12px;font-size:14px;color:var(--ink);}

.switch-field{flex-direction:row;align-items:center;gap:10px;}
.switch{position:relative;display:inline-block;width:42px;height:24px;flex-shrink:0;}
.switch input{opacity:0;width:0;height:0;}
.switch .slider{position:absolute;cursor:pointer;inset:0;background:#d3d7e4;border-radius:24px;transition:.2s;}
.switch .slider::before{content:"";position:absolute;height:18px;width:18px;left:3px;top:3px;background:#fff;border-radius:50%;transition:.2s;}
.switch input:checked + .slider{background:var(--primary);}
.switch input:checked + .slider::before{transform:translateX(18px);}

/* ---------- Buttons ---------- */
.btn{
  border:none;border-radius:9px;padding:10px 18px;font-size:14px;font-weight:600;
  cursor:pointer;transition:filter .15s, background .15s, transform .05s;
  display:inline-flex;align-items:center;gap:8px;
}
.btn:active{transform:translateY(1px);}
.btn:disabled{opacity:.5;cursor:not-allowed;}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover:not(:disabled){background:var(--primary-dark);}
.btn-secondary{background:var(--primary-light);color:var(--primary-dark);}
.btn-secondary:hover:not(:disabled){filter:brightness(0.96);}
.btn-ghost{background:transparent;color:var(--muted);border:1px solid var(--border);}
.btn-ghost:hover{background:#f2f3f8;}
.btn-danger{background:var(--danger-light);color:var(--danger);}
.btn-danger:hover{filter:brightness(0.96);}
.btn-block{width:100%;justify-content:center;margin-top:18px;}
.actions-row{display:flex;justify-content:flex-end;gap:10px;margin-top:18px;}

/* ---------- Upload row ---------- */
.upload-row{display:flex;gap:16px;align-items:flex-end;flex-wrap:wrap;}
.upload-row .field{flex:1;min-width:220px;margin-bottom:0;}
.empty-state{margin:14px 0 0;font-size:13.5px;color:var(--warn);}

/* ---------- PDF preview ---------- */
.pdf-preview{border:1px solid var(--border);border-radius:10px;overflow:auto;max-height:520px;background:#f8f9fc;padding:10px;text-align:center;}
.pdf-preview canvas{max-width:100%;border-radius:6px;box-shadow:0 2px 10px rgba(0,0,0,.08);margin-bottom:10px;}

/* ---------- Tables ---------- */
.table-scroll{overflow-x:auto;border-radius:10px;border:1px solid var(--border);}
.data-table{width:100%;border-collapse:collapse;font-size:13.5px;min-width:640px;}
.data-table th{
  background:#f7f8fc;color:var(--muted);text-transform:uppercase;font-size:11px;letter-spacing:.04em;
  text-align:left;padding:10px 12px;border-bottom:1px solid var(--border);white-space:nowrap;
}
.data-table td{padding:9px 12px;border-bottom:1px solid var(--border);vertical-align:middle;}
.data-table tr:last-child td{border-bottom:none;}
.data-table tbody tr:hover{background:#fafbff;}
.data-table input[type=text],.data-table input[type=time]{padding:6px 8px;font-size:13px;width:100px;}
.status-pill{display:inline-block;padding:3px 10px;border-radius:20px;font-size:11.5px;font-weight:700;}
.status-present{background:var(--success-light);color:var(--success);}
.status-absent{background:var(--danger-light);color:var(--danger);}
.status-late{background:#fff4e0;color:var(--warn);}
.tag{font-size:12px;font-weight:600;background:var(--primary-light);color:var(--primary-dark);padding:3px 10px;border-radius:20px;margin-left:8px;}

/* ---------- Summary cards ---------- */
.summary-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px;margin-bottom:20px;}
.summary-card{background:#f8f9fc;border:1px solid var(--border);border-radius:10px;padding:14px 16px;}
.summary-card .label{font-size:11.5px;color:var(--muted);text-transform:uppercase;letter-spacing:.03em;}
.summary-card .value{font-size:19px;font-weight:700;margin-top:4px;}
.summary-card.positive .value{color:var(--success);}
.summary-card.negative .value{color:var(--danger);}
.summary-card.highlight{background:linear-gradient(135deg,var(--primary),#7c3aed);border:none;}
.summary-card.highlight .label{color:#e3e1fb;}
.summary-card.highlight .value{color:#fff;font-size:22px;}

/* ---------- Profiles list ---------- */
.profiles-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;}
.profile-card{border:1px solid var(--border);border-radius:12px;padding:16px;background:#fbfcfe;}
.profile-card h4{margin:0 0 6px;font-size:15px;}
.profile-card .meta{font-size:12.5px;color:var(--muted);line-height:1.6;}
.profile-card .card-actions{display:flex;gap:8px;margin-top:12px;}
.profile-card .card-actions .btn{padding:7px 12px;font-size:12.5px;}
.no-profiles{color:var(--muted);font-size:14px;}

/* ---------- Messages ---------- */
.form-error{color:var(--danger);font-size:13px;background:var(--danger-light);padding:8px 12px;border-radius:8px;margin:6px 0;}
.form-success{color:var(--success);font-size:13px;background:var(--success-light);padding:8px 12px;border-radius:8px;margin:6px 0;}

/* ---------- Modal ---------- */
.modal-overlay{
  position:fixed;inset:0;background:rgba(15,15,35,.5);
  display:flex;align-items:center;justify-content:center;z-index:1000;padding:20px;
}
.modal{background:#fff;border-radius:14px;padding:26px;width:100%;max-width:380px;box-shadow:0 20px 60px rgba(0,0,0,.3);}
.modal h3{margin:0 0 6px;}

/* ---------- Loading overlay ---------- */
.loading-overlay{
  position:fixed;inset:0;background:rgba(27,33,64,.85);color:#fff;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;z-index:2000;
}
.spinner{width:38px;height:38px;border-radius:50%;border:4px solid rgba(255,255,255,.25);border-top-color:#fff;animation:spin 0.8s linear infinite;}
@keyframes spin{to{transform:rotate(360deg);}}

/* ---------- Responsive ---------- */
@media (max-width:880px){
  .sidebar{position:relative;width:100%;height:auto;flex-direction:row;align-items:center;padding:14px 16px;}
  .brand{border-bottom:none;margin-bottom:0;padding-bottom:0;}
  .nav{flex-direction:row;flex:1;justify-content:center;}
  .logout-btn{margin-left:auto;}
  .main-content{margin-left:0;padding:20px;}
  #app-shell{flex-direction:column;}
}