:root {
  --bg-page: #f8fafc;
  --bg-surface: #ffffff;
  --bg-subtle: #f1f5f9;
  --text-main: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --border-strong: #cbd5e1;
  --accent-primary: #0f766e;
  --accent-primary-hover: #115e59;
  --accent-soft: #f0fdfa;
  --accent-border: #99f6e4;
  --danger-bg: #fef2f2;
  --danger-text: #991b1b;
  --danger-border: #fecaca;
  --warn-bg: #fffbeb;
  --warn-text: #92400e;
  --warn-border: #fde68a;
  --radius-sm: 6px;
  --radius-md: 10px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-serif: "Georgia", "Times New Roman", serif;
}

*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1240px; margin: 0 auto; padding: 0 20px; }
.kpi-value, .kpi-delta, .num, input[type="number"], code { font-variant-numeric: tabular-nums; }

.site-header { background: var(--bg-surface); border-bottom: 1px solid var(--border-color); position: sticky; top: 0; z-index: 30; }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 62px; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text-main); font-size: 1.15rem; }
.brand-mark { display: inline-flex; align-items: center; justify-content: center; width: 32px; height: 32px; background: var(--accent-primary); color: #ffffff; font-weight: 700; font-size: 0.85rem; border-radius: var(--radius-sm); letter-spacing: 0.03em; }
.header-nav { display: flex; gap: 24px; }
.header-nav a { text-decoration: none; color: var(--text-secondary); font-size: 0.9rem; font-weight: 500; }
.header-nav a:hover { color: var(--accent-primary); }

.badge { display: inline-block; padding: 4px 10px; border-radius: 999px; font-size: 0.78rem; font-weight: 600; }
.badge-neutral { background: var(--bg-subtle); color: var(--text-secondary); border: 1px solid var(--border-color); }
.badge-pro { background: var(--accent-soft); color: var(--accent-primary); border: 1px solid var(--accent-border); }

.hero { background: var(--bg-surface); border-bottom: 1px solid var(--border-color); padding: 36px 0 32px; }
.hero-kicker { font-size: 0.8rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--accent-primary); margin-bottom: 8px; }
.hero h1 { margin: 0 0 12px; font-size: clamp(1.65rem, 3vw, 2.25rem); line-height: 1.2; letter-spacing: -0.02em; }
.hero-lead { margin: 0; max-width: 780px; color: var(--text-secondary); font-size: 1.02rem; }

.main-workspace { padding-top: 24px; padding-bottom: 56px; }
.tabs-bar { display: flex; gap: 8px; margin-bottom: 20px; border-bottom: 1px solid var(--border-color); padding-bottom: 12px; flex-wrap: wrap; }
.tab-btn { background: var(--bg-surface); border: 1px solid var(--border-color); color: var(--text-secondary); padding: 10px 16px; border-radius: var(--radius-sm); font-size: 0.9rem; font-weight: 600; cursor: pointer; transition: all 0.15s ease; }
.tab-btn:hover { border-color: var(--border-strong); color: var(--text-main); }
.tab-btn.active { background: var(--text-main); color: #ffffff; border-color: var(--text-main); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

.workspace-grid { display: grid; grid-template-columns: 440px 1fr; gap: 24px; align-items: start; }
.panel { background: var(--bg-surface); border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: 20px; }
.panel-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.panel-header h2, .prorata-container h2 { margin: 0; font-size: 1.08rem; }
.sub-heading { margin: 4px 0 0; font-size: 0.95rem; color: var(--text-main); }

.form-stack { display: flex; flex-direction: column; gap: 14px; }
.form-row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-row-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 14px; }
.field { display: flex; flex-direction: column; gap: 5px; }
.field label { font-size: 0.83rem; font-weight: 600; color: var(--text-main); }
.field input, .field select { width: 100%; padding: 9px 11px; border: 1px solid var(--border-strong); border-radius: var(--radius-sm); font-size: 0.92rem; color: var(--text-main); background: #ffffff; }
.field input:focus, .field select:focus { outline: 2px solid var(--accent-primary); outline-offset: -1px; border-color: var(--accent-primary); }
.field-hint { font-size: 0.76rem; color: var(--text-muted); }
.field-hint a { color: var(--accent-primary); }
.divider { border: 0; border-top: 1px solid var(--border-color); margin: 6px 0; }

.results-column { display: flex; flex-direction: column; gap: 18px; }
.kpi-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 14px; }
.kpi-box { background: var(--bg-subtle); border: 1px solid var(--border-color); border-radius: var(--radius-sm); padding: 14px; display: flex; flex-direction: column; gap: 4px; }
.kpi-box.kpi-primary { background: var(--accent-soft); border-color: var(--accent-border); }
.kpi-label { font-size: 0.78rem; font-weight: 600; color: var(--text-secondary); }
.kpi-value { font-size: 1.45rem; font-weight: 700; color: var(--text-main); }
.kpi-primary .kpi-value { color: var(--accent-primary); }
.kpi-delta { font-size: 0.82rem; font-weight: 600; color: var(--accent-primary); }
.kpi-delta.muted, .muted-text { color: var(--text-secondary); font-weight: 400; }

.alert { padding: 12px 14px; border-radius: var(--radius-sm); font-size: 0.88rem; border: 1px solid; margin-bottom: 12px; }
.alert-success { background: var(--accent-soft); color: #115e59; border-color: var(--accent-border); }
.alert-warning { background: var(--warn-bg); color: var(--warn-text); border-color: var(--warn-border); }
.alert-danger { background: var(--danger-bg); color: var(--danger-text); border-color: var(--danger-border); }

.formula-box { background: var(--bg-subtle); padding: 9px 12px; border-radius: var(--radius-sm); font-size: 0.84rem; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; }
.action-header { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.action-header h3 { margin: 0 0 4px; font-size: 1rem; }
.action-header p { margin: 0; font-size: 0.86rem; }
.action-buttons { display: flex; gap: 10px; flex-wrap: wrap; }

.btn { padding: 10px 16px; border-radius: var(--radius-sm); font-size: 0.88rem; font-weight: 600; cursor: pointer; border: 1px solid transparent; transition: background 0.15s ease; text-decoration: none; display: inline-block; }
.btn-primary { background: var(--accent-primary); color: #ffffff; }
.btn-primary:hover { background: var(--accent-primary-hover); }
.btn-secondary { background: #ffffff; color: var(--text-main); border-color: var(--border-strong); }
.btn-secondary:hover { background: var(--bg-subtle); }
.btn-link { background: none; border: none; padding: 0; color: var(--accent-primary); font-size: 0.83rem; font-weight: 600; text-decoration: underline; cursor: pointer; }
.unlock-bar { margin-top: 12px; padding-top: 10px; border-top: 1px solid var(--border-color); font-size: 0.82rem; color: var(--text-muted); }

.document-wrapper { background: #e2e8f0; border: 1px solid var(--border-strong); border-radius: var(--radius-md); padding: 16px; }
.document-toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; font-size: 0.82rem; font-weight: 600; color: var(--text-secondary); }
.status-tag { background: #ffffff; padding: 3px 9px; border-radius: 4px; border: 1px solid var(--border-strong); }

.a4-sheet { position: relative; background: #ffffff; color: #111827; font-family: var(--font-serif); padding: 36px 40px; border-radius: 4px; box-shadow: 0 2px 8px rgba(15, 23, 42, 0.08); font-size: 0.93rem; line-height: 1.55; overflow: hidden; }
.watermark-overlay { display: none; }
.a4-sheet.watermarked .watermark-overlay { display: flex; align-items: center; justify-content: center; position: absolute; inset: 0; font-family: var(--font-sans); font-size: 2rem; font-weight: 800; color: rgba(15, 23, 42, 0.07); transform: rotate(-28deg); pointer-events: none; user-select: none; letter-spacing: 0.08em; text-align: center; }

.doc-header-addresses { display: flex; justify-content: space-between; gap: 24px; margin-bottom: 24px; }
.recipient-block { max-width: 50%; padding: 12px 14px; background: #f8fafc; border: 1px solid #e2e8f0; }
.doc-meta { margin-bottom: 20px; }
.doc-meta p { margin: 4px 0; }
.doc-ref { font-size: 0.85rem; color: #475569; }

.doc-table { width: 100%; border-collapse: collapse; margin: 18px 0; font-family: var(--font-sans); font-size: 0.86rem; }
.doc-table th, .doc-table td { border: 1px solid #cbd5e1; padding: 8px 12px; text-align: left; }
.doc-table th.num, .doc-table td.num { text-align: right; white-space: nowrap; }
.doc-table .row-highlight { background: #f0fdfa; }
.doc-table .row-total { background: #f1f5f9; }
.doc-signature { margin-top: 28px; text-align: right; }
.page-break { border-top: 2px dashed #cbd5e1; margin: 32px 0; }

.quittance-box { border: 1.5px solid #334155; padding: 22px; }
.quittance-header { text-align: center; border-bottom: 1px solid #cbd5e1; padding-bottom: 10px; margin-bottom: 18px; }
.quittance-header h2 { margin: 0; font-family: var(--font-sans); font-size: 1.15rem; letter-spacing: 0.06em; }
.quittance-sub { font-size: 0.8rem; color: #475569; }
.legal-footnote { font-size: 0.78rem; color: #475569; font-style: italic; }

.prorata-result-card { background: var(--accent-soft); border: 1px solid var(--accent-border); border-radius: var(--radius-sm); padding: 14px; display: flex; flex-direction: column; justify-content: center; }

.faq-section { margin-top: 44px; }
.faq-section h2 { font-size: 1.3rem; margin-bottom: 16px; }
.faq-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.faq-card { background: var(--bg-surface); border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: 18px; }
.faq-card h3 { margin: 0 0 8px; font-size: 1rem; }
.faq-card p { margin: 0; font-size: 0.9rem; color: var(--text-secondary); }

.legal-article { background: var(--bg-surface); border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: 32px; margin: 32px auto; max-width: 860px; }
.legal-article h1 { margin-top: 0; font-size: 1.7rem; }
.legal-article h2 { margin-top: 24px; font-size: 1.15rem; }

.site-footer { background: var(--bg-surface); border-top: 1px solid var(--border-color); padding: 24px 0; font-size: 0.84rem; color: var(--text-secondary); }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.footer-links { display: flex; gap: 18px; }
.footer-links a { color: var(--text-secondary); text-decoration: none; }
.footer-links a:hover { color: var(--accent-primary); text-decoration: underline; }

.modal { border: 1px solid var(--border-strong); border-radius: var(--radius-md); padding: 0; max-width: 420px; width: 92%; }
.modal::backdrop { background: rgba(15, 23, 42, 0.55); }
.modal-box { padding: 22px; }
.modal-box h3 { margin: 0 0 8px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 16px; }
.error-msg { color: var(--danger-text); font-size: 0.84rem; margin: 8px 0 0; }

@media (max-width: 960px) { .workspace-grid { grid-template-columns: 1fr; } }
@media (max-width: 680px) {
  .header-nav { display: none; }
  .form-row-2, .form-row-3, .kpi-grid, .faq-grid { grid-template-columns: 1fr; }
  .doc-header-addresses { flex-direction: column; }
  .recipient-block { max-width: 100%; }
  .a4-sheet { padding: 20px 18px; }
}

@media print {
  @page { size: A4 portrait; margin: 15mm 16mm; }
  body { background: #ffffff; color: #000000; }
  .no-print { display: none !important; }
  .container, .main-workspace, .workspace-grid, .results-column, .document-wrapper {
    display: block !important; width: 100% !important; max-width: 100% !important;
    margin: 0 !important; padding: 0 !important; border: none !important;
    background: #ffffff !important; box-shadow: none !important;
  }
  .a4-sheet { padding: 0 !important; box-shadow: none !important; font-size: 11pt; }
  .page-break { border: none; margin: 0; page-break-before: always; break-before: page; }
}

.owner-panel{margin:28px 0}.owner-panel h2{margin-top:0}.owner-actions{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0}.file-label{cursor:pointer}.owner-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.owner-grid h3{font-size:1rem}.saved-list{display:flex;flex-direction:column;gap:8px}.saved-row{display:flex;align-items:center;justify-content:space-between;gap:8px;flex-wrap:wrap;padding:10px;border:1px solid var(--border-color);border-radius:var(--radius-sm);font-size:.86rem}@media(max-width:680px){.owner-grid{grid-template-columns:1fr}}