/* =====================================================================
   GroundOps AI - Design System
   Vanilla CSS, no build step, no framework. Mobile-first breakpoints.
   ===================================================================== */

:root{
  --brand:#2563eb;
  --brand-dark:#1d4ed8;
  --brand-light:#eff6ff;
  --ink:#0f172a;
  --ink-soft:#334155;
  --muted:#64748b;
  --border:#e2e8f0;
  --border-soft:#eef1f6;
  --bg:#f4f6fb;
  --card-bg:#ffffff;
  --danger:#dc2626;
  --danger-bg:#fef2f2;
  --success:#16a34a;
  --success-bg:#f0fdf4;
  --warning:#b45309;
  --warning-bg:#fffbeb;
  --radius-sm:6px;
  --radius:10px;
  --radius-lg:14px;
  --shadow-sm:0 1px 2px rgba(15,23,42,.06);
  --shadow:0 4px 14px rgba(15,23,42,.08);
  --shadow-lg:0 12px 32px rgba(15,23,42,.12);
  --sidebar-width:250px;
  --topbar-height:60px;
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-sans);
  background:var(--bg);
  color:var(--ink);
  font-size:15px;
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3{color:var(--ink);line-height:1.25;margin:0 0 12px}
h1{font-size:1.5rem;font-weight:700}
h2{font-size:1.05rem;font-weight:700;margin-top:0}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
p{margin:0 0 10px}

/* ---------------------------------------------------------------------
   Top bar
   --------------------------------------------------------------------- */
.topbar{
  position:sticky;top:0;z-index:40;
  display:flex;justify-content:space-between;align-items:center;
  height:var(--topbar-height);
  background:var(--ink);color:#fff;
  padding:0 20px;box-shadow:var(--shadow);
}
.topbar-left{display:flex;align-items:center;gap:14px;min-width:0}
.topbar-brand{
  display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;
  font-size:1.05rem;white-space:nowrap;
}
.topbar-brand:hover{text-decoration:none;opacity:.9}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:30px;height:30px;border-radius:8px;flex-shrink:0;
}
.brand-mark svg{width:100%;height:100%;display:block}
.topbar-nav{display:flex;align-items:center;gap:16px;flex-shrink:0}
.topbar-user{display:flex;align-items:center;gap:8px;color:#e2e8f0;font-size:.88rem}
.user-avatar{
  display:inline-flex;align-items:center;justify-content:center;
  width:26px;height:26px;border-radius:50%;background:var(--brand);
  color:#fff;font-weight:700;font-size:.75rem;flex-shrink:0;
}
.user-name{display:none}
.logout-link{
  color:#fff;background:rgba(255,255,255,.12);padding:7px 14px;
  border-radius:999px;font-size:.85rem;font-weight:600;transition:background .15s;
}
.logout-link:hover{background:rgba(255,255,255,.22);text-decoration:none}

/* Hamburger (mobile nav toggle) */
.nav-toggle-checkbox{display:none}
.hamburger{
  display:flex;flex-direction:column;justify-content:center;gap:4px;
  width:22px;height:18px;cursor:pointer;flex-shrink:0;
}
.hamburger span{display:block;height:2px;width:100%;background:#fff;border-radius:2px}
.sidebar-overlay{
  display:none;position:fixed;inset:0;background:rgba(15,23,42,.5);
  z-index:45;cursor:pointer;
}

/* ---------------------------------------------------------------------
   Layout
   --------------------------------------------------------------------- */
.page{min-height:calc(100vh - var(--topbar-height))}
.layout{display:flex;align-items:flex-start}

.sidebar{
  width:var(--sidebar-width);flex-shrink:0;
  background:var(--card-bg);border-right:1px solid var(--border);
  min-height:calc(100vh - var(--topbar-height));
  position:sticky;top:var(--topbar-height);
  padding:16px 12px;
}
.sidebar ul{list-style:none;padding:0;margin:0}
.sidebar li{margin-bottom:2px}
.nav-group-label{
  font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;
  color:var(--muted);margin:18px 10px 6px;
}
.sidebar li:first-child.nav-group-label{margin-top:4px}
.nav-link{
  display:flex;align-items:center;gap:10px;
  padding:9px 12px;border-radius:var(--radius-sm);
  color:var(--ink-soft);font-weight:600;font-size:.88rem;
  transition:background .12s,color .12s;
}
.nav-link:hover{background:var(--brand-light);color:var(--brand-dark);text-decoration:none}
.nav-link.active{background:var(--brand-light);color:var(--brand-dark)}
.nav-icon{fill:var(--muted);flex-shrink:0}
.nav-link.active .nav-icon,.nav-link:hover .nav-icon{fill:var(--brand)}

.content{flex:1;min-width:0;padding:20px 22px 60px}

/* ---------------------------------------------------------------------
   Auth pages
   --------------------------------------------------------------------- */
.auth-card{
  max-width:400px;margin:8vh auto;background:var(--card-bg);
  padding:32px 28px;border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);
  border:1px solid var(--border-soft);
}
.auth-card h1{font-size:1.3rem;margin-top:0}

/* ---------------------------------------------------------------------
   Forms - inputs, selects, textareas all share one look
   --------------------------------------------------------------------- */
label{display:block;font-size:.82rem;font-weight:600;color:var(--ink-soft);margin:14px 0 5px}
label:first-child{margin-top:0}

input[type=text],input[type=email],input[type=password],input[type=number],
input[type=date],input[type=time],input[type=file],input[type=search],
select,textarea{
  width:100%;padding:10px 12px;border:1.5px solid var(--border);border-radius:var(--radius-sm);
  font-size:.92rem;font-family:inherit;color:var(--ink);background:#fff;
  transition:border-color .12s,box-shadow .12s;
}
input:focus,select:focus,textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-light);
}
input:disabled,select:disabled{background:var(--bg);color:var(--muted);cursor:not-allowed}

/* Custom select arrow, consistent across browsers, no framework needed */
select{
  appearance:none;-webkit-appearance:none;-moz-appearance:none;
  padding-right:36px;cursor:pointer;
  background-image:url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3e%3cpath fill='%2364748b' d='M6 8 0 0h12z'/%3e%3c/svg%3e");
  background-repeat:no-repeat;background-position:right 12px center;background-size:11px 7px;
}
select::-ms-expand{display:none}
select[multiple]{background-image:none;padding-right:12px}

input[type=checkbox],input[type=radio]{width:auto;accent-color:var(--brand)}

.field-hint{font-size:.78rem;color:var(--muted);margin:4px 0 0}

button,.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:10px 18px;background:var(--brand);color:#fff;border:0;
  border-radius:var(--radius-sm);font-size:.9rem;font-weight:600;cursor:pointer;
  transition:background .12s,transform .05s;width:100%;
}
button:hover,.btn:hover{background:var(--brand-dark);text-decoration:none;color:#fff}
button:active,.btn:active{transform:scale(.98)}
button:disabled{background:var(--muted);cursor:not-allowed}
button[style*="width:auto"],.btn-inline{width:auto}

/* Secondary/ghost buttons - opt in via class, used for Cancel/less-primary actions */
.btn-secondary{background:#fff;color:var(--ink-soft);border:1.5px solid var(--border)}
.btn-secondary:hover{background:var(--bg);color:var(--ink)}
.btn-danger{background:var(--danger)}
.btn-danger:hover{background:#b91c1c}

/* ---------------------------------------------------------------------
   Alerts
   --------------------------------------------------------------------- */
.alert{padding:11px 14px;border-radius:var(--radius-sm);margin:0 0 14px;font-size:.88rem;border:1px solid transparent}
.alert-error{background:var(--danger-bg);color:var(--danger);border-color:#fecaca}
.alert-success{background:var(--success-bg);color:var(--success);border-color:#bbf7d0}
.alert-stack{margin-bottom:14px}

/* ---------------------------------------------------------------------
   Cards, stats, KPI badges
   --------------------------------------------------------------------- */
.card{
  background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);
  padding:20px;margin-bottom:18px;box-shadow:var(--shadow-sm);overflow-x:auto;
}
.card h2{padding-bottom:10px;border-bottom:1px solid var(--border-soft);margin-bottom:14px}

.kv-table{width:100%;border-collapse:collapse;font-size:.88rem}
.kv-table th{text-align:left;color:var(--muted);font-weight:600;padding:8px 10px 8px 0;white-space:nowrap}
.kv-table td{padding:8px 10px 8px 0;border-bottom:1px solid var(--border-soft)}
.kv-table tr:last-child td{border-bottom:0}
table.kv-table tr:not(:first-child):hover td{background:var(--bg)}

.kpi-badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;font-size:.78rem;font-weight:700}
.kpi-green{background:var(--success-bg);color:var(--success)}
.kpi-amber{background:var(--warning-bg);color:var(--warning)}
.kpi-red{background:var(--danger-bg);color:var(--danger)}

.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:14px;margin:14px 0}
.stat-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow-sm)}
.stat-card .stat-value{font-size:1.5rem;font-weight:800;color:var(--ink)}
.stat-card .stat-label{font-size:.76rem;color:var(--muted);margin-top:2px}

.chart-wrap{max-width:100%;margin:14px 0}

/* ---------------------------------------------------------------------
   Formal report layout (Executive/Project reports) - distinct from the
   dashboard "stat card" feel: letterhead header, numbered sections,
   detailed tables. Shares .card/.kv-table styling for consistency.
   --------------------------------------------------------------------- */
.report-letterhead{
  display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:16px;
  padding-bottom:18px;margin-bottom:20px;border-bottom:3px solid var(--ink);
}
.report-letterhead .company-name{font-size:1.1rem;font-weight:800;color:var(--ink)}
.report-letterhead .report-title{font-size:1.3rem;font-weight:800;color:var(--brand);margin:2px 0}
.report-letterhead .report-meta{font-size:.8rem;color:var(--muted);text-align:right}
.report-letterhead .report-meta div{margin-bottom:2px}

.report-section{margin-bottom:28px}
.report-section-title{
  display:flex;align-items:center;gap:10px;font-size:1rem;font-weight:800;color:var(--ink);
  margin:0 0 12px;padding-bottom:8px;border-bottom:2px solid var(--border);
}
.report-section-number{
  display:inline-flex;align-items:center;justify-content:center;
  width:24px;height:24px;border-radius:6px;background:var(--brand);color:#fff;
  font-size:.78rem;font-weight:800;flex-shrink:0;
}
.report-narrative{background:var(--brand-light);border-left:4px solid var(--brand);border-radius:0 var(--radius-sm) var(--radius-sm) 0;padding:12px 16px;margin-bottom:16px;font-size:.9rem;color:var(--ink-soft)}
.report-table-title{font-size:.85rem;font-weight:700;color:var(--ink-soft);margin:16px 0 8px}
.report-table-title:first-child{margin-top:0}

.text-right{text-align:right !important}
.text-muted{color:var(--muted)}
.text-total td{font-weight:700;border-top:2px solid var(--border) !important}

.sidebar-note{font-size:.78rem;color:var(--muted);margin-top:20px;padding:0 10px}

.footer{padding:18px 20px;text-align:center;color:var(--muted);font-size:.78rem}

/* ---------------------------------------------------------------------
   Mobile off-canvas navigation (checkbox toggle, no JS)
   --------------------------------------------------------------------- */
@media (max-width:860px){
  .hamburger{display:flex}
  .layout{display:block}
  .sidebar{
    position:fixed;top:0;left:0;bottom:0;z-index:50;
    transform:translateX(-100%);transition:transform .2s ease;
    box-shadow:var(--shadow-lg);width:82vw;max-width:300px;
    padding-top:calc(var(--topbar-height) + 12px);
  }
  #nav-toggle:checked ~ main .sidebar{transform:translateX(0)}
  #nav-toggle:checked ~ main .sidebar-overlay{display:block}
  .content{padding:16px 14px 48px}
  .user-name{display:none}
  .topbar-brand .brand-text{display:none}
}

@media (min-width:861px){
  .hamburger{display:none}
  .sidebar-overlay{display:none !important}
  .user-name{display:inline}
}

@media (max-width:520px){
  .auth-card{margin:6vh 16px;padding:24px 20px}
  .stat-grid{grid-template-columns:repeat(auto-fit,minmax(130px,1fr))}
  h1{font-size:1.25rem}
}

/* ---------------------------------------------------------------------
   Print
   --------------------------------------------------------------------- */
@media print{
  .topbar,.sidebar,.sidebar-overlay,.footer,form,button,.no-print{display:none !important}
  .layout{display:block}
  .card{border:none;box-shadow:none;padding:0;margin-bottom:16px;overflow:visible}
  body{background:#fff}
  .content{padding:0}
  .report-section{page-break-inside:avoid}
  .report-letterhead{border-bottom-color:#000}
}