/* ── Variables ─────────────────────────────────────────────────────────────── */
:root {
  --primary:      #1e3a5f;
  --primary-mid:  #2d5a9e;
  --primary-light:#3b82f6;
  --accent:       #f0a500;
  --bg:           #f1f5f9;
  --card:         #ffffff;
  --border:       #e2e8f0;
  --text:         #1e293b;
  --muted:        #64748b;
  --muted-light:  #94a3b8;

  --c-v:          #3b82f6;   /* Fremdvermietung – blue */
  --c-e:          #10b981;   /* Eigennutzung    – emerald */
  --c-a:          #f59e0b;   /* Anlegen         – amber */

  --green:        #16a34a;
  --red:          #dc2626;
  --green-soft:   #dcfce7;
  --red-soft:     #fee2e2;

  --radius:       12px;
  --radius-sm:    8px;
  --shadow:       0 1px 3px rgba(0,0,0,.07), 0 4px 12px rgba(0,0,0,.05);
  --shadow-md:    0 4px 16px rgba(0,0,0,.10);
}

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

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
}

/* ── Header ─────────────────────────────────────────────────────────────────── */
.site-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-mid) 100%);
  color: #fff;
  padding: 20px 0;
  margin-bottom: 0;
  box-shadow: 0 2px 12px rgba(0,0,0,.2);
}

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

.header-title {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -.02em;
  margin: 0;
}

.header-subtitle {
  font-size: .85rem;
  opacity: .75;
  margin: 2px 0 0;
}

.header-badge {
  background: rgba(255,255,255,.15);
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 20px;
  padding: 4px 12px;
  font-size: .78rem;
  white-space: nowrap;
}

/* ── Section labels ─────────────────────────────────────────────────────────── */
.section-label {
  font-size: .7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--muted);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.section-label-sub {
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  color: var(--muted-light);
  font-size: .75rem;
}

/* ── Input cards ─────────────────────────────────────────────────────────────── */
.input-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.input-card-header {
  padding: 12px 16px 10px;
  font-weight: 600;
  font-size: .82rem;
  color: var(--primary);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 7px;
  background: #f8fafc;
  border-radius: var(--radius) var(--radius) 0 0;
}

.input-card-body {
  padding: 14px 16px 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ── Field groups ────────────────────────────────────────────────────────────── */
.field-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.field-group label {
  font-size: .78rem;
  font-weight: 500;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 4px;
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.form-input {
  width: 100%;
  padding: 7px 40px 7px 10px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: .85rem;
  color: var(--text);
  background: #fff;
  transition: border-color .15s, box-shadow .15s;
  -moz-appearance: textfield;
}

.form-input::-webkit-outer-spin-button,
.form-input::-webkit-inner-spin-button { -webkit-appearance: none; }

.form-input:focus {
  outline: none;
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(59,130,246,.12);
}

.unit {
  position: absolute;
  right: 10px;
  font-size: .75rem;
  color: var(--muted-light);
  pointer-events: none;
  white-space: nowrap;
}

.field-hint {
  font-size: .72rem;
  color: var(--muted-light);
  font-variant-numeric: tabular-nums;
}

/* ── 100 % Eigenkapital toggle ──────────────────────────────────────────────── */
.field-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.ek-switch {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  font-weight: 500;
}
.ek-switch input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}
.ek-switch-track {
  position: relative;
  width: 30px;
  height: 16px;
  border-radius: 999px;
  background: var(--border);
  transition: background .15s ease;
  flex-shrink: 0;
}
.ek-switch-track::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 2px rgba(0,0,0,.25);
  transition: transform .15s ease;
}
.ek-switch input:checked + .ek-switch-track {
  background: var(--primary-light);
}
.ek-switch input:checked + .ek-switch-track::after {
  transform: translateX(14px);
}
.ek-switch input:focus-visible + .ek-switch-track {
  outline: 2px solid var(--primary-light);
  outline-offset: 2px;
}
.ek-switch-text {
  font-size: .72rem;
  color: var(--muted);
}
.form-input.is-auto {
  background: var(--bg);
  color: var(--muted);
  cursor: not-allowed;
}

/* ── Financing preview (inside Finanzierung card) ──────────────────────────── */
.financing-preview {
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px dashed var(--border);
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.fp-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: .78rem;
  color: var(--muted);
}

.fp-row.highlight {
  font-size: .88rem;
  color: var(--text);
  background: #eff6ff;
  margin: 4px -6px;
  padding: 4px 6px;
  border-radius: 6px;
}

/* ── Tooltip icon ─────────────────────────────────────────────────────────────── */
.tooltip-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--border);
  color: var(--muted);
  font-size: .65rem;
  font-style: normal;
  cursor: help;
  line-height: 1;
  flex-shrink: 0;
}

/* ── Advanced settings ───────────────────────────────────────────────────────── */
.btn-advanced {
  background: none;
  border: 1.5px dashed var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 14px;
  font-size: .8rem;
  color: var(--muted);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: border-color .15s, color .15s;
}

.btn-advanced:hover { border-color: var(--primary-light); color: var(--primary); }

.chevron-icon { transition: transform .25s ease; }

.advanced-panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-top: 8px;
  box-shadow: var(--shadow);
}

.adv-label {
  font-size: .78rem;
  font-weight: 500;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 5px;
}

/* ── Calculate button ───────────────────────────────────────────────────────── */
.btn-calculate {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-mid) 100%);
  color: #fff;
  border: none;
  border-radius: 50px;
  padding: 13px 40px;
  font-family: inherit;
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  letter-spacing: .01em;
  box-shadow: 0 4px 14px rgba(30,58,95,.35);
  transition: transform .15s, box-shadow .15s;
}

.btn-calculate:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(30,58,95,.4);
}

.btn-calculate:active { transform: translateY(0); }

/* ── Financing summary bar ──────────────────────────────────────────────────── */
.financing-bar {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px 16px;
  box-shadow: var(--shadow);
}

.fb-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.fb-item.highlight {
  background: #eff6ff;
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  border: 1px solid #bfdbfe;
}

.fb-label {
  font-size: .7rem;
  color: var(--muted);
  white-space: nowrap;
}

.fb-pct { color: var(--muted-light); }

.fb-value {
  font-size: .92rem;
  font-weight: 600;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.text-danger-soft { color: #b91c1c; }

.fb-sep {
  color: var(--muted-light);
  font-size: 1rem;
  font-weight: 300;
  align-self: center;
}

/* ── Scenario cards ─────────────────────────────────────────────────────────── */
.scenario-card {
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  height: 100%;
  position: relative;
  transition: box-shadow .2s, transform .2s;
  box-shadow: var(--shadow);
}

.scenario-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.scenario-v { border-top: 4px solid var(--c-v); }
.scenario-e { border-top: 4px solid var(--c-e); }
.scenario-a { border-top: 4px solid var(--c-a); }

.scenario-card.is-best {
  box-shadow: 0 0 0 3px rgba(245,158,11,.25), var(--shadow-md);
}

.best-badge {
  position: absolute;
  top: -1px;
  right: 16px;
  background: #fbbf24;
  color: #78350f;
  font-size: .68rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 0 0 8px 8px;
  letter-spacing: .03em;
  text-transform: uppercase;
}

.sc-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.sc-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.sc-icon-v { background: #eff6ff; color: var(--c-v); }
.sc-icon-e { background: #ecfdf5; color: var(--c-e); }
.sc-icon-a { background: #fffbeb; color: var(--c-a); }

.sc-title {
  font-weight: 700;
  font-size: .95rem;
  color: var(--text);
}

.sc-subtitle {
  font-size: .74rem;
  color: var(--muted);
}

/* Main number display */
.sc-main-number {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -.03em;
  margin-bottom: 4px;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

.sc-main-label {
  display: block;
  font-size: .72rem;
  font-weight: 400;
  color: var(--muted);
  margin-top: 2px;
  letter-spacing: 0;
}

/* Dual number display */
.sc-dual-numbers {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  padding: 12px;
  background: #f8fafc;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.sc-dual-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sc-dual-value {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -.03em;
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}

.sc-dual-label {
  font-size: .7rem;
  font-weight: 600;
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: .05em;
}

.sc-dual-hint {
  font-size: .67rem;
  color: var(--muted-light);
}

.sc-dual-sep {
  font-size: 1.4rem;
  color: var(--muted-light);
  font-weight: 300;
  flex-shrink: 0;
}

/* Metric rows */
.sc-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 16px 0;
  padding: 12px;
  background: #f8fafc;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.sc-metric { display: flex; flex-direction: column; gap: 2px; }

.sc-metric-label {
  font-size: .68rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .06em;
}

.sc-metric-value {
  font-size: .9rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* Breakdown section */
.sc-breakdown {
  border-top: 1px solid var(--border);
  padding-top: 12px;
}

.scb-title {
  font-size: .68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--muted);
  margin-bottom: 8px;
}

.scb-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: .78rem;
  color: var(--muted);
  padding: 2px 0;
  gap: 8px;
}

.scb-row span:first-child { flex: 1; }

.scb-total {
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px solid var(--border);
  font-weight: 600;
  color: var(--text);
  font-size: .82rem;
}

.scb-equity {
  background: #f0fdf4;
  border-radius: 4px;
  padding: 4px 6px !important;
  margin-top: 6px;
  color: var(--green) !important;
  font-size: .74rem !important;
}

.text-muted-sm { font-size: .72rem; color: var(--muted-light); }

/* ── Color utilities ─────────────────────────────────────────────────────────── */
.positive        { color: var(--green); }
.negative        { color: var(--red); }
.positive-soft   { color: #15803d; }
.negative-soft   { color: #b91c1c; }

/* ── Chart cards ─────────────────────────────────────────────────────────────── */
.chart-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  height: 100%;
}

.chart-title {
  font-weight: 700;
  font-size: .92rem;
  color: var(--text);
  margin-bottom: 2px;
}

.chart-subtitle {
  font-size: .74rem;
  color: var(--muted);
  margin-bottom: 14px;
}

.chart-container {
  position: relative;
  height: 320px;
}

.chart-container-sm {
  height: 200px;
}

/* ── Assumption box ──────────────────────────────────────────────────────────── */
.assumption-box {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-size: .76rem;
  color: var(--muted);
}

.assumption-title {
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: .78rem;
}

.assumption-box ul {
  margin: 0;
  padding-left: 16px;
}

.assumption-box li { margin-bottom: 3px; }

/* ── Recommendation banner ──────────────────────────────────────────────────── */
.recommendation-banner {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 18px 22px;
  border-radius: var(--radius);
  border: 2px solid;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}

.recommendation-anlegen     { background: #fffbeb; border-color: #fbbf24; }
.recommendation-fremdvermietung { background: #eff6ff; border-color: #93c5fd; }
.recommendation-eigennutzung { background: #ecfdf5; border-color: #6ee7b7; }

.rec-icon {
  font-size: 2rem;
  line-height: 1;
  flex-shrink: 0;
  margin-top: 2px;
}

.recommendation-anlegen .rec-icon     { color: var(--c-a); }
.recommendation-fremdvermietung .rec-icon { color: var(--c-v); }
.recommendation-eigennutzung .rec-icon { color: var(--c-e); }

.rec-title {
  font-weight: 700;
  font-size: .95rem;
  margin-bottom: 4px;
}

.rec-text {
  font-size: .83rem;
  color: var(--muted);
  line-height: 1.5;
}

/* ── Footer ──────────────────────────────────────────────────────────────────── */
.site-footer-bar {
  text-align: center;
  font-size: .72rem;
  color: var(--muted-light);
  padding: 14px 0 20px;
  border-top: 1px solid var(--border);
  margin-top: 12px;
}

/* ── Responsive tweaks ───────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .header-title { font-size: 1.3rem; }
  .sc-main-number { font-size: 1.6rem; }
  .financing-bar { flex-direction: column; align-items: flex-start; }
  .fb-sep { display: none; }
  .sc-metrics { grid-template-columns: 1fr; }
}

@media (max-width: 576px) {
  .header-badge { display: none; }
  .btn-calculate { padding: 11px 28px; font-size: .88rem; }
}