/* Swiss Clean Minimalist Design System */
:root {
  --bg-canvas: #FFFFFF;
  --bg-card: #FAFAFA;
  --text-main: #09090B;
  --text-muted: #71717A;
  --border-color: #E4E4E7;
  --accent-black: #000000;
  --accent-white: #FFFFFF;
  --danger: #DC2626;
  --success: #16A34A;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius: 4px;
}

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

html {
  font-family: var(--font-sans);
  background-color: var(--bg-canvas);
  color: var(--text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header {
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-canvas);
  padding: 16px 24px;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand-wrapper {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-main);
}

.brand-tag {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn-secondary {
  background: transparent;
  color: var(--text-main);
  border: 1px solid var(--border-color);
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  transition: background-color 0.15s ease;
}

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

.btn-primary {
  background: var(--accent-black);
  color: var(--accent-white);
  border: 1px solid var(--accent-black);
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  transition: opacity 0.15s ease;
}

.btn-primary:hover {
  opacity: 0.9;
}

.main-content {
  flex: 1;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 32px 24px;
}

.hero-section {
  margin-bottom: 32px;
}

.hero-title {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 8px;
}

.hero-subtitle {
  font-size: 15px;
  color: var(--text-muted);
  max-width: 800px;
}

.ad-wrapper {
  margin: 32px 0;
  padding: 20px;
  background: var(--bg-card);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius);
  text-align: center;
}

.ad-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 8px;
  display: block;
}

.ad-content {
  font-size: 13px;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}

.tool-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 32px;
}

@media (max-width: 900px) {
  .tool-grid {
    grid-template-columns: 1fr;
  }
}

.panel-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
}

.panel-title {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.form-group {
  margin-bottom: 16px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}

.form-hint {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
}

.input-text, .input-select {
  width: 100%;
  padding: 8px 12px;
  font-size: 13px;
  font-family: var(--font-sans);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  background: #FFFFFF;
  color: var(--text-main);
  outline: none;
}

.input-text:focus, .input-select:focus {
  border-color: var(--accent-black);
}

.mono-display {
  font-family: var(--font-mono);
}

.table-wrapper {
  overflow-x: auto;
  margin: 16px 0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  background: #FFFFFF;
}

.expense-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
  text-align: left;
}

.expense-table th {
  background: var(--bg-card);
  padding: 10px 12px;
  border-bottom: 1px solid var(--border-color);
  font-weight: 600;
  color: var(--text-main);
}

.expense-table td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-main);
}

.expense-table tr:last-child td {
  border-bottom: none;
}

.btn-remove {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
}

.btn-remove:hover {
  color: var(--danger);
}

.btn-small {
  padding: 6px 10px;
  font-size: 11px;
}

.results-summary-card {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 16px;
}

.summary-headline {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.summary-value {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.03em;
  font-family: var(--font-mono);
  margin-bottom: 4px;
}

.summary-status {
  font-size: 12px;
  font-weight: 500;
}

.status-overpaid {
  color: var(--danger);
}

.status-underpaid {
  color: var(--success);
}

.status-neutral {
  color: var(--text-muted);
}

.metrics-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}

.metric-box {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 12px;
}

.metric-title {
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.metric-val {
  font-size: 15px;
  font-weight: 700;
  font-family: var(--font-mono);
}

.audit-logs {
  font-family: var(--font-mono);
  font-size: 11px;
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 12px;
  max-height: 180px;
  overflow-y: auto;
  line-height: 1.6;
}

.audit-item {
  border-bottom: 1px dashed var(--border-color);
  padding: 4px 0;
}

.audit-item:last-child {
  border-bottom: none;
}

.audit-warning {
  color: var(--danger);
}

.affiliate-recom-box {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 14px;
  margin-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.affiliate-text {
  font-size: 12px;
  color: var(--text-muted);
}

.affiliate-text strong {
  color: var(--text-main);
}

.methodology-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 32px;
}

.methodology-title {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.methodology-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  font-size: 13px;
  color: var(--text-muted);
}

.methodology-grid h4 {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}

.site-footer {
  margin-top: auto;
  background: var(--bg-canvas);
  border-top: 1px solid var(--border-color);
  padding: 32px 24px;
  font-size: 12px;
  color: var(--text-muted);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-links {
  display: flex;
  gap: 16px;
}

.footer-link {
  color: var(--text-muted);
  text-decoration: none;
}

.footer-link:hover {
  color: var(--text-main);
}

.modal-scrim {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.4);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  padding: 16px;
}

.modal-scrim.active {
  display: flex;
}

.modal-window {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  width: 100%;
  max-width: 500px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  overflow: hidden;
}

.modal-header {
  padding: 16px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.modal-close {
  background: none;
  border: none;
  font-size: 18px;
  cursor: pointer;
  color: var(--text-muted);
}

.modal-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-card);
}

.modal-tab-btn {
  flex: 1;
  padding: 10px;
  font-size: 12px;
  font-weight: 600;
  border: none;
  background: transparent;
  cursor: pointer;
  border-right: 1px solid var(--border-color);
  color: var(--text-muted);
}

.modal-tab-btn:last-child {
  border-right: none;
}

.modal-tab-btn.active {
  background: #FFFFFF;
  color: var(--text-main);
  border-bottom: 2px solid var(--accent-black);
}

.modal-body {
  padding: 16px;
}

.support-widget-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: #FFFFFF;
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 10px 14px;
  font-size: 13px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  z-index: 100;
  transition: border-color 0.15s ease;
}

.support-widget-float:hover {
  border-color: var(--accent-black);
}

.hidden {
  display: none !important;
}

@media (max-width: 640px) {
  .site-header {
    padding: 12px 16px;
  }
  .header-container {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .main-content {
    padding: 16px 12px;
  }
  .tool-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .panel-card {
    padding: 16px 12px;
    min-width: 0;
    width: auto;
  }
  .form-row {
    grid-template-columns: minmax(0, 1fr);
  }
  .form-group {
    min-width: 0;
  }
  .input-text, .input-select {
    min-width: 0;
  }
  .metrics-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .modal-window {
    max-width: 95vw;
  }
}