:root {
  --blue: #2563eb;
  --blue-bg: #eff6ff;
  --blue-dark: #1e40af;
  --text: #111827;
  --text-muted: #6b7280;
  --text-light: #9ca3af;
  --border: #e5e7eb;
  --bg: #ffffff;
  --bg-soft: #f9fafb;
  --bg-tint: #f3f4f6;
  --green: #16a34a;
  --green-bg: #f0fdf4;
  --red: #dc2626;
  --red-bg: #fef2f2;
  --amber: #d97706;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; color: var(--text); background: var(--bg-tint); line-height: 1.5; font-size: 14px; }
a { color: var(--blue); text-decoration: none; }
h1,h2,h3 { margin: 0; font-weight: 600; }

.landing { max-width: 640px; margin: 80px auto; padding: 24px; text-align: center; }
.landing h1 { font-size: 4em; color: var(--blue); letter-spacing: -2px; margin: 0; }
.landing .tag { font-size: 1.2em; color: var(--text-muted); margin-top: 8px; }
.landing .status { margin-top: 48px; padding: 16px; background: var(--bg); border: 1px solid var(--border); border-radius: 12px; }
.landing code { background: var(--bg-tint); padding: 2px 6px; border-radius: 4px; font-family: ui-monospace, monospace; }

.login-shell { display: grid; grid-template-columns: 1fr 1fr; min-height: 100vh; background: var(--bg); }
.login-left { background: var(--blue); color: white; padding: 60px 50px; }
.login-left .brand { font-size: 36px; font-weight: 600; letter-spacing: -1px; }
.login-left .tag { font-size: 15px; opacity: 0.85; margin-top: 8px; }
.login-left .features { margin-top: 60px; padding: 0; list-style: none; font-size: 14px; line-height: 2; opacity: 0.95; }
.login-left .features li::before { content: "✓ "; }
.login-right { padding: 80px 60px; display: flex; flex-direction: column; justify-content: center; }
.login-right h2 { font-size: 22px; margin-bottom: 8px; }
.login-right .sub { color: var(--text-muted); margin: 0 0 24px; font-size: 13px; }
.login-right label { display: block; font-size: 12px; color: var(--text-muted); margin-top: 16px; margin-bottom: 4px; }
.login-right input { width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px; }
.login-right .btn { width: 100%; padding: 11px; margin-top: 24px; border: 0; border-radius: 6px; background: var(--blue); color: white; font-size: 14px; cursor: pointer; }
.login-right .small { font-size: 12px; color: var(--text-muted); text-align: center; margin-top: 16px; }
.login-right .err { background: var(--red-bg); color: var(--red); padding: 10px; border-radius: 6px; font-size: 13px; }

.app { display: grid; grid-template-columns: 220px 1fr; min-height: 100vh; background: var(--bg); }
.sidebar { background: var(--bg-soft); border-right: 1px solid var(--border); padding: 16px 12px; }
.sidebar .brand { font-size: 22px; font-weight: 600; color: var(--blue); padding: 4px 8px 16px; border-bottom: 1px solid var(--border); margin-bottom: 12px; }
.sidebar .tenant { font-size: 11px; color: var(--text-muted); padding: 0 8px 12px; }
.sidebar .nav-item { display: block; padding: 8px 10px; border-radius: 6px; color: var(--text-muted); font-size: 13px; margin-bottom: 2px; }
.sidebar .nav-item.active { background: var(--blue-bg); color: var(--blue-dark); font-weight: 500; }
.sidebar .nav-item:hover { background: var(--bg-tint); }
.sidebar .nav-group { font-size: 10px; text-transform: uppercase; color: var(--text-light); padding: 12px 10px 4px; letter-spacing: 0.5px; }

.main { padding: 20px 28px; }
.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.topbar h2 { font-size: 20px; }
.topbar .sub { font-size: 12px; color: var(--text-muted); margin-top: 2px; }
.topbar .right { display: flex; align-items: center; gap: 12px; }
.topbar .avatar { width: 32px; height: 32px; border-radius: 50%; background: var(--blue-bg); color: var(--blue-dark); display: flex; align-items: center; justify-content: center; font-size: 13px; font-weight: 500; }
.topbar .lang { font-size: 11px; padding: 4px 10px; background: var(--green-bg); color: var(--green); border-radius: 999px; }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 20px; }
.stat { background: var(--bg-soft); padding: 14px 16px; border-radius: 8px; }
.stat .label { font-size: 12px; color: var(--text-muted); }
.stat .value { font-size: 22px; font-weight: 600; margin-top: 4px; }
.stat .delta { font-size: 11px; margin-top: 2px; color: var(--text-muted); }
.stat .delta.warn { color: var(--amber); }
.stat.alert { background: var(--red-bg); }
.stat.alert .value { color: var(--red); }

.hint { font-size: 13px; color: var(--text-muted); padding: 14px; background: var(--blue-bg); border-radius: 6px; }

/* Forms / cards / tables */
.card { background: var(--bg); border: 1px solid var(--border); border-radius: 10px; margin-bottom: 16px; overflow: hidden; }
.card-head { padding: 12px 16px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; }
.card-head h3 { font-size: 14px; font-weight: 500; margin: 0; }
.card-body { padding: 14px 16px; }
.card.no-pad .card-body, .card.no-pad table { padding: 0; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.kv > div { display: flex; justify-content: space-between; padding: 6px 0; border-bottom: 1px solid var(--border); font-size: 13px; }
.kv > div:last-child { border-bottom: none; }
.kv span { color: var(--text-muted); }
.kv strong { font-weight: 500; }
.kv strong.red { color: var(--red); }
.kv strong.green { color: var(--green); }

.form-stack > * { margin-bottom: 16px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-grid .form-field.full { grid-column: 1 / -1; }
.form-field label { display: block; font-size: 12px; color: var(--text-muted); margin-bottom: 4px; }
.form-field input, .form-field select, .form-field textarea { width: 100%; padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px; font-size: 13px; background: white; font-family: inherit; }
.form-field input:focus, .form-field select:focus, .form-field textarea:focus { outline: none; border-color: var(--blue); }
.form-field .errorlist { color: var(--red); list-style: none; padding: 0; margin: 4px 0 0; font-size: 12px; }
.form-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 16px; }

.btn { padding: 8px 14px; border: 1px solid var(--border); border-radius: 6px; background: white; font-size: 13px; cursor: pointer; color: var(--text); text-decoration: none; display: inline-flex; align-items: center; gap: 6px; font-family: inherit; }
.btn:hover { background: var(--bg-soft); }
.btn.primary { background: var(--blue); color: white; border-color: var(--blue); }
.btn.primary:hover { background: var(--blue-dark); }
.btn.danger { color: var(--red); border-color: #fecaca; }
.btn.small { padding: 4px 10px; font-size: 12px; }

.toolbar { display: flex; gap: 8px; align-items: center; margin-bottom: 14px; flex-wrap: wrap; background: var(--bg); padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; }
.toolbar input, .toolbar select { padding: 7px 10px; border: 1px solid var(--border); border-radius: 6px; font-size: 13px; background: white; }
.toolbar input.search { width: 260px; }

.data-table { width: 100%; font-size: 13px; border-collapse: collapse; }
.data-table th { text-align: left; padding: 10px 12px; background: var(--bg-soft); border-bottom: 1px solid var(--border); font-weight: 500; color: var(--text-muted); font-size: 12px; }
.data-table td { padding: 10px 12px; border-bottom: 1px solid var(--border); }
.data-table tr:hover td { background: var(--bg-soft); }
.data-table .num { text-align: right; font-variant-numeric: tabular-nums; }
.data-table .center { text-align: center; }
.data-table .right { text-align: right; }
.data-table .muted { color: var(--text-muted); }
.data-table .small { font-size: 12px; }
.data-table tfoot td { background: var(--bg-soft); font-weight: 500; }
.data-table tr.total-row td { border-top: 2px solid var(--border-strong, var(--border)); font-weight: 600; }
.data-table .empty { text-align: center; color: var(--text-muted); padding: 30px; }

.line-table input, .line-table select { padding: 6px 8px; border: 1px solid var(--border); border-radius: 4px; font-size: 13px; width: 100%; background: white; }
.line-table td { padding: 6px 8px; vertical-align: middle; }
.del-label { font-size: 11px; color: var(--red); margin-left: 4px; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 11px; font-weight: 500; }
.badge.green { background: var(--green-bg); color: var(--green); }
.badge.red { background: var(--red-bg); color: var(--red); }
.badge.amber { background: #fffbeb; color: var(--amber); }
.badge.gray { background: var(--bg-tint); color: var(--text-muted); }

.flash { padding: 10px 14px; border-radius: 6px; margin-bottom: 14px; font-size: 13px; }
.flash-success { background: var(--green-bg); color: var(--green); }
.flash-error { background: var(--red-bg); color: var(--red); }
.flash-info { background: var(--blue-bg); color: var(--blue-dark); }
.muted { color: var(--text-muted); }
.small { font-size: 12px; }