:root {
  --speclin-primary: #5B4BDB;
  --speclin-primary-dark: #3A2EA8;
  --speclin-accent: #00B894;
  --speclin-warn: #F1A208;
  --speclin-danger: #E14C4C;
  --speclin-sky: #00A8E8;
  --speclin-pink: #E84393;

  --speclin-bg: #eef1f8;
  --speclin-surface: #ffffff;
  --speclin-border: #e6e9f2;
  --speclin-text: #1f2740;
  --speclin-muted: #7a869a;

  --grad-brand: linear-gradient(100deg, #3A2EA8 0%, #5B4BDB 42%, #00A8E8 100%);
  --grad-accent: linear-gradient(120deg, #00B894 0%, #00CEC9 100%);

  --topbar-h: 60px;
  --sb-w: 254px;
  --radius: 14px;
  --shadow-sm: 0 1px 2px rgba(31,39,64,.06);
  --shadow-md: 0 6px 20px rgba(31,39,64,.10);
  --shadow-lg: 0 14px 40px rgba(31,39,64,.16);
}

* { box-sizing: border-box; }

body.speclin {
  background:
    radial-gradient(1200px 500px at 110% -10%, rgba(0,168,232,.10), transparent 60%),
    radial-gradient(900px 500px at -10% 0%, rgba(91,75,219,.10), transparent 55%),
    var(--speclin-bg);
  color: var(--speclin-text);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 14px;
  min-height: 100vh;
}

/* ---------------------------------------------------------------- Topbar */
.topbar {
  position: fixed; top: 0; left: 0; right: 0; height: var(--topbar-h);
  display: flex; align-items: center; gap: 10px;
  padding: 0 16px;
  background: var(--grad-brand);
  box-shadow: var(--shadow-md);
  z-index: 1040;
}
.topbar .sb-toggle {
  border: none; background: rgba(255,255,255,.16); color: #fff;
  width: 38px; height: 38px; border-radius: 10px; font-size: 18px;
  display: inline-flex; align-items: center; justify-content: center;
  cursor: pointer; transition: background .15s, transform .15s;
}
.topbar .sb-toggle:hover { background: rgba(255,255,255,.30); transform: translateY(-1px); }
.topbar .brand { text-decoration: none; }
.brand-logo {
  width: 40px; height: 40px;
  background: rgba(255,255,255,.18);
  border: 1px solid rgba(255,255,255,.45);
  border-radius: 11px;
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 800; color: #fff; font-size: 21px;
}
.brand-title { font-weight: 800; color: #fff; line-height: 1.05; letter-spacing: .2px; }
.brand-sub   { font-size: 11px; color: rgba(255,255,255,.72); letter-spacing: .6px; }
.topbar-spacer { flex: 1; }
.tenant-pill {
  color: #fff; background: rgba(255,255,255,.16);
  border: 1px solid rgba(255,255,255,.30);
  border-radius: 30px; padding: 5px 14px; font-size: 12.5px; white-space: nowrap;
}
.tenant-pill a { text-decoration: none; }
.tenant-pill-btn {
  display: inline-flex; align-items: center; gap: 6px; cursor: pointer;
  max-width: 260px;
}
.tenant-pill-btn .agency-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tenant-pill-btn:hover { background: rgba(255,255,255,.28); }
.tenant-pill-btn::after { margin-left: 4px; }
.agency-menu {
  max-height: 70vh; overflow-y: auto; min-width: 280px;
  border: none; border-radius: 12px; box-shadow: var(--shadow-lg);
  padding: 6px;
}
.agency-menu .dropdown-header { color: var(--speclin-muted); font-weight: 700; text-transform: uppercase; font-size: 11px; letter-spacing: .5px; }
.agency-item {
  display: flex; align-items: center; gap: 9px;
  border-radius: 9px; padding: 8px 12px; font-size: 13.5px; font-weight: 500;
}
.agency-item i { color: var(--speclin-primary); }
.agency-item:hover { background: color-mix(in srgb, var(--speclin-primary) 10%, transparent); }
.agency-item.active { background: var(--grad-brand); color: #fff; }
.agency-item.active i, .agency-item.active small { color: #fff !important; }
.user-btn { color: #fff; background: rgba(255,255,255,.16); border: 1px solid rgba(255,255,255,.30); font-weight: 600; }
.user-btn:hover { color: #fff; background: rgba(255,255,255,.30); }

/* ---------------------------------------------------------------- Sidebar */
.app-sidebar {
  position: fixed; top: var(--topbar-h); bottom: 0; left: 0;
  width: var(--sb-w);
  background:
    radial-gradient(420px 220px at 0% 0%, rgba(0,168,232,.20), transparent 60%),
    linear-gradient(195deg, #2B2566 0%, #221C52 48%, #171339 100%);
  border-right: 1px solid rgba(255,255,255,.06);
  box-shadow: 3px 0 24px rgba(20,16,54,.28);
  display: flex; flex-direction: column;
  overflow-y: auto; overflow-x: hidden;
  transition: width .22s ease, transform .22s ease;
  z-index: 1030;
}
.app-sidebar::-webkit-scrollbar { width: 8px; }
.app-sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,.16); border-radius: 8px; }
.sb-nav { padding: 14px 12px; gap: 5px; }
.sb-nav .nav-link {
  display: flex; align-items: center; gap: 12px;
  color: rgba(255,255,255,.78);
  padding: 10px 12px; border-radius: 12px;
  font-size: 13.5px; font-weight: 600; white-space: nowrap;
  transition: background .15s, color .15s, transform .12s;
}
.sb-nav .nav-link i {
  font-size: 17px; width: 30px; height: 30px; flex: 0 0 30px;
  display: inline-flex; align-items: center; justify-content: center;
  color: #fff;
  background: linear-gradient(135deg,
      var(--ico, #5B4BDB),
      color-mix(in srgb, var(--ico, #5B4BDB) 60%, #000));
  border-radius: 9px;
  box-shadow: 0 2px 8px color-mix(in srgb, var(--ico, #5B4BDB) 45%, transparent);
  transition: transform .12s, box-shadow .15s;
}
.sb-nav .nav-link:hover {
  background: rgba(255,255,255,.08);
  color: #fff;
  transform: translateX(3px);
}
.sb-nav .nav-link:hover i { transform: scale(1.06); }
.sb-nav .nav-link.active {
  background: rgba(255,255,255,.12);
  color: #fff;
  box-shadow: inset 3px 0 0 0 var(--ico, #5B4BDB), var(--shadow-sm);
}
.sb-nav .nav-link.active i { box-shadow: 0 3px 12px color-mix(in srgb, var(--ico,#5B4BDB) 70%, transparent); }
.sidebar-foot {
  margin-top: auto; padding: 16px 16px 20px;
  color: rgba(255,255,255,.55); font-size: 12px;
  border-top: 1px solid rgba(255,255,255,.08); white-space: nowrap;
}
.sidebar-foot strong { color: #fff; }

/* collapsed (icon rail) */
body.sidebar-collapsed { --sb-w: 76px; }
body.sidebar-collapsed .nav-text,
body.sidebar-collapsed .sidebar-foot .nav-text { display: none; }
body.sidebar-collapsed .sb-nav .nav-link { justify-content: center; padding: 10px; }
body.sidebar-collapsed .sb-nav .nav-link:hover { transform: none; }
body.sidebar-collapsed .sidebar-foot { text-align: center; padding: 14px 6px; }

/* ---------------------------------------------------------------- Main */
.app-main {
  margin-left: var(--sb-w);
  margin-top: var(--topbar-h);
  padding: 26px 30px;
  transition: margin-left .22s ease;
  min-height: calc(100vh - var(--topbar-h));
}
.sb-overlay { display: none; }

@media (max-width: 767px) {
  .app-sidebar { transform: translateX(-100%); box-shadow: var(--shadow-lg); }
  body.sidebar-open .app-sidebar { transform: translateX(0); }
  .app-main { margin-left: 0; padding: 18px 16px; }
  body.sidebar-open .sb-overlay {
    display: block; position: fixed; inset: var(--topbar-h) 0 0 0;
    background: rgba(15,20,40,.45); z-index: 1025;
  }
}

/* ---------------------------------------------------------------- Headings */
.main h1, .app-main h1 { color: var(--speclin-primary-dark); font-weight: 800; }
h1 { font-size: 24px; margin-bottom: 4px; }
.app-main .text-muted.small { color: var(--speclin-muted) !important; }
h2 { font-size: 18px; color: var(--speclin-primary-dark); font-weight: 700; }

/* ---------------------------------------------------------------- KPI cards */
.kpi-card {
  background: var(--speclin-surface);
  border: 1px solid var(--speclin-border);
  border-radius: var(--radius);
  padding: 16px 18px 16px 20px;
  position: relative; overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform .15s ease, box-shadow .15s ease;
}
.kpi-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.kpi-card::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 6px;
  background: var(--k, var(--speclin-primary));
}
.kpi-card .kpi-label { color: var(--speclin-muted); font-size: 11.5px; text-transform: uppercase; letter-spacing: .7px; font-weight: 600; }
.kpi-card .kpi-value { font-size: 24px; font-weight: 800; color: var(--speclin-text); margin-top: 2px; }
.kpi-card .kpi-sub { font-size: 11.5px; color: var(--speclin-muted); }
.kpi-card.kpi-accent { --k: var(--speclin-accent); }
.kpi-card.kpi-warn   { --k: var(--speclin-warn); }
.kpi-card.kpi-danger { --k: var(--speclin-danger); }
/* colorful cycle for plain KPI cards by column position */
.row > [class*="col"]:nth-child(5n+1) .kpi-card:not(.kpi-accent):not(.kpi-warn):not(.kpi-danger) { --k: #6C5CE7; }
.row > [class*="col"]:nth-child(5n+2) .kpi-card:not(.kpi-accent):not(.kpi-warn):not(.kpi-danger) { --k: #00A8E8; }
.row > [class*="col"]:nth-child(5n+3) .kpi-card:not(.kpi-accent):not(.kpi-warn):not(.kpi-danger) { --k: #E84393; }
.row > [class*="col"]:nth-child(5n+4) .kpi-card:not(.kpi-accent):not(.kpi-warn):not(.kpi-danger) { --k: #00B894; }
.row > [class*="col"]:nth-child(5n+5) .kpi-card:not(.kpi-accent):not(.kpi-warn):not(.kpi-danger) { --k: #F1A208; }

/* ---------------------------------------------------------------- Cards */
.card.speclin-card {
  border: 1px solid var(--speclin-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: box-shadow .15s ease;
  overflow: hidden;
}
.card.speclin-card:hover { box-shadow: var(--shadow-md); }
.card.speclin-card .card-header {
  background: linear-gradient(180deg, #fbfcff, #f4f6fc);
  border-bottom: 1px solid var(--speclin-border);
  font-weight: 700; color: var(--speclin-primary-dark);
}

/* ---------------------------------------------------------------- Tables */
.table thead th { color: var(--speclin-muted); font-size: 11.5px; text-transform: uppercase; letter-spacing: .5px; border-bottom: 2px solid var(--speclin-border); }
.table tbody td { vertical-align: middle; font-size: 13.5px; }
.table-hover tbody tr:hover { background: color-mix(in srgb, var(--speclin-primary) 5%, transparent); }
.accordion-button:not(.collapsed) { background: color-mix(in srgb, var(--speclin-primary) 8%, #fff); color: var(--speclin-primary-dark); }
.accordion-button:focus { box-shadow: none; }

/* ---------------------------------------------------------------- Badges */
.badge-status { font-size: 11px; font-weight: 600; padding: 4px 9px; border-radius: 20px; border: 1px solid; }
.badge-Draft { background: #f0f3f7; color: #4d5b6a; border-color: #d8dee5; }
.badge-Ready { background: #ecf6ff; color: #1a6cad; border-color: #b6d8f0; }
.badge-Sent { background: #fff7e6; color: #946200; border-color: #f3d6a0; }
.badge-Partially { background: #fff1f8; color: #b3197a; border-color: #f5c2df; }
.badge-Paid { background: #e8f9f1; color: #117e4a; border-color: #a8e5c3; }
.badge-Overdue { background: #fde9e8; color: #a51a1f; border-color: #f0adb0; }
.badge-Denied { background: #fde9e8; color: #a51a1f; border-color: #f0adb0; }
.badge-Appealed { background: #ecf6ff; color: #1a6cad; border-color: #b6d8f0; }
.badge-Written { background: #f0f3f7; color: #4d5b6a; border-color: #d8dee5; }
.badge-Void { background: #f0f3f7; color: #4d5b6a; border-color: #d8dee5; }

/* ---------------------------------------------------------------- Buttons */
.btn-speclin { background: var(--grad-brand); color: #fff; border: none; font-weight: 600; box-shadow: var(--shadow-sm); }
.btn-speclin:hover { color: #fff; filter: brightness(1.07); transform: translateY(-1px); }
.btn-accent { background: var(--grad-accent); color: #fff; border: none; font-weight: 600; }
.btn-accent:hover { color: #fff; filter: brightness(1.05); transform: translateY(-1px); }
.btn { border-radius: 9px; transition: filter .15s, transform .12s, background .15s; }

/* ---------------------------------------------------------------- Login */
.login-shell {
  display: flex; min-height: 100vh; align-items: stretch;
  background: var(--grad-brand);
}
.login-pane-left { flex: 1; padding: 60px; color: #fff; display: flex; flex-direction: column; justify-content: center; }
.login-pane-left .big-brand { display: flex; align-items: center; margin-bottom: 30px; }
.login-pane-left .big-brand .brand-logo { width: 56px; height: 56px; font-size: 28px; border-radius: 14px; }
.login-pane-left h1 { font-size: 38px; font-weight: 800; color: #fff; }
.login-pane-left p.lead { font-size: 16px; color: rgba(255,255,255,.88); }
.login-pane-left ul.features { list-style: none; padding: 0; margin-top: 30px; }
.login-pane-left ul.features li { padding: 6px 0; color: rgba(255,255,255,.92); }
.login-pane-left ul.features li i { color: #7BFFE3; margin-right: 8px; }
.login-pane-right { width: 430px; background: #fff; padding: 60px 50px; display: flex; flex-direction: column; justify-content: center; }
.login-pane-right h2 { color: var(--speclin-primary-dark); font-weight: 800; }
.login-pane-right .btn { font-weight: 600; }

/* ---------------------------------------------------------------- Aging bar */
.aging-bar { display: flex; width: 100%; height: 26px; border-radius: 8px; overflow: hidden; border: 1px solid var(--speclin-border); }
.aging-bar > div { display: flex; align-items: center; justify-content: center; color: #fff; font-size: 11px; font-weight: 700; }
.aging-0   { background: #00B894; }
.aging-31  { background: #7BC043; }
.aging-61  { background: #F1A208; }
.aging-91  { background: #E8772E; }
.aging-120 { background: #E14C4C; }