:root {
  --bg: #f0f2f5;
  --surface: #ffffff;
  --primary: #1a5f4a;
  --primary-light: #2d8a6e;
  --accent: #e8a838;
  --text: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --danger: #dc2626;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 4px 12px rgba(0,0,0,.04);
  --radius: 8px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

/* Login */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #1a5f4a 0%, #2d8a6e 50%, #3da882 100%);
}

.login-card {
  background: var(--surface);
  padding: 2.5rem;
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0,0,0,.15);
  width: 100%;
  max-width: 400px;
}

.login-card h1 {
  font-size: 1.5rem;
  color: var(--primary);
  margin-bottom: .25rem;
}

.login-card .subtitle {
  color: var(--text-muted);
  font-size: .875rem;
  margin-bottom: 1.5rem;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-size: .875rem;
  font-weight: 500;
  margin-bottom: .375rem;
  color: var(--text);
}

.form-group input,
.form-group select {
  width: 100%;
  padding: .625rem .875rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: .9375rem;
  transition: border-color .15s;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,95,74,.12);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .625rem 1.25rem;
  border: none;
  border-radius: var(--radius);
  font-size: .9375rem;
  font-weight: 500;
  cursor: pointer;
  transition: background .15s, transform .1s;
}

.btn:active { transform: scale(.98); }

.btn-primary {
  background: var(--primary);
  color: #fff;
  width: 100%;
}

.btn-primary:hover { background: var(--primary-light); }

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover { background: var(--bg); }

.error-msg {
  color: var(--danger);
  font-size: .875rem;
  margin-top: .75rem;
  text-align: center;
}

/* Layout */
.app-header {
  background: var(--primary);
  color: #fff;
  padding: .75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow);
}

.app-header h1 { font-size: 1.125rem; font-weight: 600; }

.header-user {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: .875rem;
}

.app-body {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: calc(100vh - 52px);
}

.sidebar {
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 1rem;
  overflow-y: auto;
}

.sidebar h2 {
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--text-muted);
  margin-bottom: .75rem;
}

.filter-row {
  display: grid;
  gap: .75rem;
  margin-bottom: 1.25rem;
}

.main-content {
  padding: 1.25rem;
  overflow-x: hidden;
  overflow-y: auto;
  background: var(--bg);
  min-width: 0;
}

/* Content views */
.content-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  gap: 1rem;
}

.content-header h2 {
  font-size: 1.125rem;
  font-weight: 600;
}

.content-header .count {
  font-weight: 400;
  color: var(--text-muted);
  font-size: .9375rem;
}

.btn-back {
  display: inline-flex;
  align-items: center;
  gap: .375rem;
  padding: .5rem .875rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-size: .875rem;
  cursor: pointer;
  white-space: nowrap;
}

.btn-back:hover { background: var(--bg); border-color: var(--primary); color: var(--primary); }

.content-header-left {
  display: flex;
  align-items: center;
  gap: .75rem;
  min-width: 0;
}

.content-header-left h2 {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.content-header-right {
  display: flex;
  align-items: center;
  gap: .75rem;
  flex-shrink: 0;
}

.block-filter {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: .875rem;
}

.block-filter select {
  padding: .375rem .625rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: .875rem;
}

/* Project list in main content */
.project-table-wrap {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.project-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .875rem;
}

.project-table th {
  background: #f8fafc;
  padding: .75rem 1rem;
  text-align: left;
  font-weight: 600;
  font-size: .8125rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
}

.project-table td {
  padding: .75rem 1rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.project-table tbody tr {
  cursor: pointer;
  transition: background .12s;
}

.project-table tbody tr:hover td { background: #f8fafb; }

.project-table .col-name { font-weight: 500; }
.project-table .col-meta { color: var(--text-muted); font-size: .8125rem; white-space: nowrap; }

.project-table .open-btn {
  padding: .25rem .625rem;
  font-size: .8125rem;
  border: 1px solid var(--primary);
  border-radius: 4px;
  background: transparent;
  color: var(--primary);
  cursor: pointer;
}

.project-table .open-btn:hover { background: #edf7f3; }

/* Calculations table */
.panel {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.panel-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.panel-header h2 { font-size: 1rem; }

.tabs {
  display: flex;
  gap: .25rem;
}

.tab {
  padding: .375rem .75rem;
  border-radius: var(--radius);
  font-size: .8125rem;
  cursor: pointer;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-muted);
}

.tab.active {
  background: var(--primary);
  color: #fff;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .875rem;
}

.data-table th {
  background: #f8fafc;
  padding: .625rem .75rem;
  text-align: left;
  font-weight: 600;
  font-size: .8125rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
}

.data-table td {
  padding: .5rem .75rem;
  border-bottom: 1px solid var(--border);
}

.data-table tr:hover td { background: #f8fafc; }

.data-table .num { text-align: right; font-variant-numeric: tabular-nums; }

.data-table .stage-row td {
  background: #edf7f3;
  font-weight: 600;
  color: var(--primary);
}

.totals-bar {
  padding: 1rem 1.25rem;
  background: #f8fafc;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 2rem;
  font-size: .875rem;
}

.totals-bar .total-value {
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--primary);
}

/* Editable calculation rows */
.cell-input {
  width: 100%;
  min-width: 70px;
  padding: .25rem .375rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: .8125rem;
  font-variant-numeric: tabular-nums;
}

.cell-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(26,95,74,.1);
}

.cell-input.input-changed {
  border-color: var(--accent);
  background: #fffbeb;
}

.cell-input.input-saved {
  border-color: #22c55e;
  background: #f0fdf4;
}

.cell-input.input-error {
  border-color: var(--danger);
  background: #fef2f2;
}

.row-actions {
  display: flex;
  gap: .25rem;
  justify-content: flex-end;
}

.btn-icon {
  width: 28px;
  height: 28px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--surface);
  cursor: pointer;
  font-size: .875rem;
  line-height: 1;
}

.btn-icon:hover { background: var(--bg); }
.btn-icon.btn-save { color: var(--primary); border-color: var(--primary); }
.btn-icon.btn-delete { color: var(--danger); }
.btn-icon:disabled { opacity: .4; cursor: not-allowed; }

.ref-price {
  font-size: .6875rem;
  color: var(--text-muted);
  margin-top: .125rem;
}

.add-row-bar {
  padding: .75rem 1.25rem;
  border-top: 1px solid var(--border);
  background: #f8fafc;
  display: flex;
  gap: .5rem;
  align-items: center;
  flex-wrap: wrap;
}

.add-row-form {
  display: none;
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--border);
  background: #f8fafc;
  gap: .75rem;
  align-items: end;
  flex-wrap: wrap;
}

.add-row-form.open { display: flex; }

.add-row-form .form-group { margin-bottom: 0; min-width: 160px; flex: 1; }

.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  padding: .75rem 1.25rem;
  border-radius: var(--radius);
  background: var(--text);
  color: #fff;
  font-size: .875rem;
  box-shadow: var(--shadow);
  z-index: 1000;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity .2s, transform .2s;
}

.toast.show { opacity: 1; transform: translateY(0); }
.toast.error { background: var(--danger); }
.toast.success { background: var(--primary); }

.data-table .desc-col { min-width: 180px; }
.data-table .actions-col { width: 80px; }

.editing-hint {
  font-size: .8125rem;
  color: var(--text-muted);
  margin-left: .75rem;
}

.search-box {
  margin-bottom: 1rem;
}

.search-box input {
  width: 100%;
  padding: .625rem .875rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: .9375rem;
}

.empty-state {
  text-align: center;
  padding: 3rem;
  color: var(--text-muted);
}

.empty-cell {
  text-align: center;
  padding: 2rem;
  color: var(--text-muted);
}

.data-table tr.row-inactive td {
  opacity: 0.55;
}

.detail-header-block .content-header {
  margin-bottom: .5rem;
}

.detail-header-block {
  margin-bottom: 1rem;
  max-width: 100%;
  min-width: 0;
}

.detail-header-actions {
  flex-wrap: wrap;
  flex-shrink: 1;
  min-width: 0;
  justify-content: flex-end;
}

.detail-section-tabs {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding-bottom: .625rem;
  margin-bottom: .5rem;
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.detail-section-tabs .section-tabs {
  flex-wrap: wrap;
}

.detail-context-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem .75rem;
  padding: .5rem .75rem;
  margin-bottom: .5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.detail-context-bar .block-filter {
  flex-shrink: 0;
}

.detail-context-bar .line-filter,
.detail-context-bar .tabs {
  flex-wrap: wrap;
}

.detail-header {
  flex-wrap: wrap;
  align-items: flex-start;
}

.detail-header .content-header-left {
  flex: 1 1 12rem;
  min-width: 0;
}

.detail-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem 1.25rem;
  padding: .75rem 1rem;
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  max-width: 100%;
  min-width: 0;
}

.toolbar-section {
  display: flex;
  align-items: center;
  gap: .625rem;
  flex-wrap: wrap;
  min-width: 0;
}

.toolbar-section-export {
  padding-left: 1rem;
  border-left: 2px solid var(--primary);
}

@media (max-width: 900px) {
  .toolbar-section-export {
    padding-left: 0;
    border-left: none;
    padding-top: .5rem;
    border-top: 1px solid var(--border);
    width: 100%;
  }
}

.toolbar-title {
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .03em;
  color: var(--text-muted);
  white-space: nowrap;
}

.toolbar-btns {
  display: flex;
  align-items: center;
  gap: .375rem;
  flex-wrap: wrap;
}

.btn-export-file {
  background: #0d6e4f;
  color: #fff;
  border: 1px solid #0a5a40;
  font-size: .8125rem;
  padding: .4rem .75rem;
  white-space: nowrap;
}

.btn-export-file:hover {
  background: #0a5a40;
  color: #fff;
}

.export-docx-group {
  display: inline-flex;
  align-items: center;
  gap: .375rem;
}

.export-variant-select {
  padding: .35rem .5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: .8125rem;
  background: var(--surface);
}

.detail-header .content-header-right {
  flex-wrap: wrap;
}

.section-tabs {
  flex-shrink: 0;
}

.report-btns {
  display: flex;
  align-items: center;
  gap: .375rem;
  flex-wrap: wrap;
}

.report-label {
  font-size: .8125rem;
  color: var(--text-muted);
}

.btn-report {
  padding: .3rem .6rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  font-size: .75rem;
  cursor: pointer;
  color: var(--text);
}

.btn-report:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: #edf7f3;
}

.form-bar {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  align-items: flex-end;
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--border);
  background: #f8fafc;
}

.form-bar .form-group {
  margin-bottom: 0;
  min-width: 140px;
}

.form-bar .form-group label {
  font-size: .75rem;
}

.form-bar .form-group input,
.form-bar .form-group select {
  padding: .5rem .625rem;
  font-size: .875rem;
}

.btn-sm {
  padding: .35rem .65rem;
  font-size: .8125rem;
}

.project-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .375rem;
  align-items: center;
}

.panel-desc {
  padding: .75rem 1.25rem 0;
  font-size: .875rem;
  color: var(--text-muted);
}

.panel-subtitle {
  padding: .75rem 1.25rem 0;
  margin: 0;
  font-size: .95rem;
  font-weight: 600;
}

.remaining-warn {
  color: var(--danger);
  font-weight: 600;
}

.modal-panel.modal-wide {
  max-width: 720px;
  width: 100%;
}

.modal-panel.modal-scroll {
  max-height: 90vh;
  overflow-y: auto;
}

.modal-sub {
  margin: 1rem 0 .5rem;
  font-size: .9rem;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: .75rem;
  margin-bottom: .5rem;
}

.coeff-grid .coeff-field input {
  max-width: 120px;
}

.coeff-summary {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem 1.25rem;
  font-size: .8rem;
  color: var(--text-muted);
  margin-bottom: .5rem;
  width: 100%;
}

.pagination-bar {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .5rem 1.25rem;
  font-size: .875rem;
}

.macro-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .5rem;
  padding: .75rem 1.25rem;
  border-bottom: 1px solid var(--border);
}

.line-filter {
  display: inline-flex;
}

.btn-danger {
  background: var(--danger);
  color: #fff;
  border-color: var(--danger);
}

.content-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.admin-tabs {
  flex-wrap: wrap;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: .75rem;
  padding: 1rem 1.25rem;
}

.modal-actions {
  display: flex;
  gap: .5rem;
  justify-content: flex-end;
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--border);
}

.attach-mark {
  opacity: .7;
  font-size: .85em;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, .45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1rem;
}

.modal-panel {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem 1.5rem;
  max-width: 420px;
  width: 100%;
}

.modal-panel h3 {
  margin-bottom: .5rem;
  font-size: 1rem;
}

.modal-hint {
  font-size: .8125rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.modal-actions {
  display: flex;
  gap: .5rem;
  margin-top: 1rem;
}

.pii-badge {
  display: inline-block;
  font-size: .6875rem;
  padding: .125rem .5rem;
  border-radius: 4px;
  background: #fef3c7;
  color: #92400e;
  margin-left: .5rem;
}

@media (max-width: 768px) {
  .app-body { grid-template-columns: 1fr; }
  .sidebar { border-right: none; border-bottom: 1px solid var(--border); }
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: .5rem;
  margin-top: .5rem;
}

.btn-block {
  width: 100%;
  text-align: left;
}

.sidebar-nav .btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.analytics-agg {
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
}

.clickable-row {
  cursor: pointer;
}

.clickable-row:hover {
  background: rgba(37, 99, 235, .06);
}

.btn-report-sm {
  padding: .2rem .45rem;
  font-size: .75rem;
  min-width: 1.6rem;
}