:root {
  --navy: #1c3a5e;
  --navy-dark: #142a44;
  --bg: #f4f6f9;
  --card: #ffffff;
  --border: #dde3ea;
  --text: #1f2937;
  --muted: #6b7280;
  --accent: #2563eb;
  --good: #15803d;
  --good-bg: #ecfdf3;
  --error: #b91c1c;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.page { max-width: 1100px; margin: 0 auto; padding: 32px 20px 64px; }

.tool-nav { display: flex; gap: 4px; margin-bottom: 20px; flex-wrap: wrap; align-items: center; }
.tool-nav a { text-decoration: none; color: var(--muted); font-size: 13px; font-weight: 600; padding: 7px 14px; border-radius: 7px; }
.tool-nav a:hover { background: var(--bg); color: var(--text); }
.tool-nav a.active { background: var(--navy); color: white; }
.tool-nav .spacer { flex: 1; }
.tool-nav .signed-in { font-size: 12px; color: var(--muted); margin-right: 8px; }

.page-header { display: flex; align-items: center; gap: 16px; margin-bottom: 28px; }
.brand { width: 52px; height: 52px; border-radius: 12px; background: var(--navy); color: white; display: flex; align-items: center; justify-content: center; font-weight: 700; letter-spacing: 0.5px; font-size: 15px; flex-shrink: 0; }
.page-header h1 { margin: 0 0 2px; font-size: 22px; }
.subtitle { margin: 0; color: var(--muted); font-size: 14px; }

.layout { display: grid; grid-template-columns: 1.3fr 1fr; gap: 20px; align-items: start; }
@media (max-width: 820px) { .layout { grid-template-columns: 1fr; } }

.card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 20px 22px; }

fieldset { border: none; padding: 0; margin: 0 0 22px; }
legend { font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; color: var(--navy); padding: 0; margin-bottom: 10px; }

.field { margin-bottom: 14px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.field-row.four { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 480px) { .field-row, .field-row.four { grid-template-columns: 1fr; } }

label { display: block; font-size: 13px; font-weight: 500; margin-bottom: 5px; color: var(--text); }
.hint { font-size: 12px; color: var(--muted); font-weight: 400; }

input, select, textarea { width: 100%; padding: 9px 10px; border: 1px solid var(--border); border-radius: 7px; font-size: 14px; font-family: inherit; color: var(--text); background: white; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
input:disabled { background: var(--bg); color: var(--muted); }

.date-parts { display: flex; align-items: center; gap: 6px; }
.date-parts input { text-align: center; }
.date-parts input:nth-child(1) { width: 4.5em; }
.date-parts input:nth-child(3) { width: 4.5em; }
.date-parts input:nth-child(5) { width: 6em; }
.date-sep { color: var(--muted); font-weight: 600; }

.checkbox-label { display: flex; align-items: center; gap: 8px; font-weight: 400; margin-bottom: 8px; }
.checkbox-label input { width: auto; }

.actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
button { background: var(--navy); color: white; border: none; border-radius: 8px; padding: 11px 20px; font-size: 14px; font-weight: 600; cursor: pointer; }
button:hover { background: var(--navy-dark); }
button:disabled { opacity: 0.6; cursor: not-allowed; }
button.secondary { background: white; color: var(--navy); border: 1px solid var(--navy); }
button.secondary:hover { background: #eef2f7; }
button.danger { background: white; color: var(--error); border: 1px solid var(--error); }
button.danger:hover { background: #fef2f2; }

.error { color: var(--error); font-size: 13px; }

.preview h2 { margin: 0 0 4px; font-size: 16px; }
.preview-body { margin-top: 14px; }
.preview-table { width: 100%; border-collapse: collapse; font-size: 13.5px; margin-bottom: 16px; }
.preview-table td { padding: 6px 4px; border-bottom: 1px solid var(--border); }
.preview-table td:last-child { text-align: right; font-variant-numeric: tabular-nums; }
.preview-table tr.total td { font-weight: 700; border-bottom: none; border-top: 2px solid var(--navy); }
.section-label { font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; color: var(--navy); margin: 18px 0 6px; }
.net-banner { background: var(--good-bg); color: var(--good); border-radius: 8px; padding: 12px 14px; font-weight: 700; font-size: 15px; margin-top: 4px; }
.net-words { font-weight: 400; font-size: 12.5px; display: block; margin-top: 2px; color: #166534; }

table.data-table { width: 100%; border-collapse: collapse; font-size: 14px; }
table.data-table th, table.data-table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
table.data-table th { font-size: 12px; text-transform: uppercase; letter-spacing: 0.03em; color: var(--muted); font-weight: 600; }
table.data-table tr:hover td { background: var(--bg); }
table.data-table .row-actions { text-align: right; white-space: nowrap; }
table.data-table .row-actions button { padding: 5px 10px; font-size: 12px; margin-left: 6px; }

.empty-state { text-align: center; padding: 40px 20px; color: var(--muted); }

.login-wrap { max-width: 380px; margin: 90px auto 0; }