/* KX-SECTION rechner-box-spread START */
/* ===========================================
   BOX SPREAD RECHNER PAGE
   =========================================== */

/* ── Shared ──────────────────────────────── */
#bsr-hero, #bsr-intro, #bsr-construction,
#bsr-security, #bsr-warning, #bsr-yield, #bsr-short-box, #bsr-europe {
  font-family: var(--konvex-font);
  box-sizing: border-box;
}
#bsr-hero *, #bsr-intro *, #bsr-construction *,
#bsr-security *, #bsr-warning *, #bsr-yield *, #bsr-short-box *, #bsr-europe * {
  box-sizing: border-box;
}
.bsr-inner {
  max-width: var(--konvex-container);
  margin: 0 auto;
}

/* ── Section 1: Calculator Hero (Dark) ───── */
#bsr-hero {
  background: #0a0a0a;
  background-image:
    radial-gradient(at 20% 30%, rgba(56, 182, 255, 0.08) 0px, transparent 50%),
    radial-gradient(at 80% 70%, rgba(16, 185, 129, 0.06) 0px, transparent 50%);
  padding: 80px 24px;
  color: #f8fafc;
}
.bsr-header { text-align: center; margin-bottom: 2rem; }
.bsr-header h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  margin: 0 0 0.75rem;
  background: linear-gradient(to right, #60a5fa, #34d399);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.bsr-subtitle {
  color: #94a3b8;
  font-size: 1rem;
  max-width: 40rem;
  margin: 0 auto;
  line-height: 1.6;
}

/* Legend Chips */
.bsr-legend {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}
.bsr-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(30, 41, 59, 0.6);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 20px;
  padding: 6px 16px;
  font-size: 0.8rem;
  color: #cbd5e1;
}
.bsr-chip strong {
  color: var(--gray-100);
  margin-right: 2px;
}
.bsr-chip-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* Calculator Panel */
.bsr-calc-panel {
  max-width: 720px;
  margin: 0 auto;
  background: rgba(30, 41, 59, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.1);
  box-shadow: 0 8px 32px rgba(0,0,0,0.37);
  border-radius: var(--konvex-radius);
  padding: 2rem;
}
.bsr-input-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.bsr-calc-panel label {
  display: block;
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  color: #94a3b8;
  margin-bottom: 0.25rem;
}
.bsr-calc-panel input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border-radius: 0.5rem;
  font-family: 'SF Mono', Menlo, monospace;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(148,163,184,0.2);
  color: #fff;
  outline: none;
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.bsr-calc-panel input:focus {
  border-color: #3b82f6;
  box-shadow: 0 0 0 2px rgba(59,130,246,0.3);
}
.bsr-btn {
  width: 100%;
  padding: 0.75rem 1rem;
  background: linear-gradient(to right, #2563eb, #3b82f6);
  color: #fff;
  font-weight: 700;
  border: none;
  border-radius: 0.5rem;
  cursor: pointer;
  font-size: 1rem;
  transition: transform 0.1s, opacity 0.2s;
}
.bsr-btn:hover { opacity: 0.9; }
.bsr-btn:active { transform: scale(0.98); }

.bsr-error {
  display: none;
  color: #f87171;
  font-size: 0.85rem;
  text-align: center;
  margin-top: 0.75rem;
}

/* Results */
.bsr-results {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(51,65,85,0.5);
}
.bsr-res-card {
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid rgba(51,65,85,1);
  border-radius: 0.75rem;
  padding: 0.75rem;
  text-align: center;
}
.bsr-res-full { grid-column: span 2; background: rgba(15,23,42,0.4); border-color: rgba(51,65,85,0.5); }
.bsr-res-highlight { background: rgba(16,185,129,0.1); border-color: rgba(16,185,129,0.2); }
.bsr-res-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #94a3b8;
  margin-bottom: 0.25rem;
}
.bsr-res-highlight .bsr-res-label { color: #34d399; font-weight: 700; }
.bsr-res-val {
  font-family: 'SF Mono', Menlo, monospace;
  font-weight: 700;
  font-size: 1.125rem;
  color: #fff;
}
.bsr-res-highlight .bsr-res-val { color: #34d399; }
.bsr-res-full .bsr-res-val { font-size: 0.95rem; }
.bsr-res-muted { color: #94a3b8 !important; }

/* ── Section 2: Intro (Light) ────────────── */
#bsr-intro {
  background: var(--gray-100);
  padding: 80px 24px;
  text-align: center;
}
.bsr-section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 800;
  color: var(--konvex-accent);
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
}
.bsr-section-sub {
  color: var(--konvex-gray);
  font-size: 1rem;
  max-width: 640px;
  margin: 0 auto 2rem;
  line-height: 1.65;
}
.bsr-intro-text {
  max-width: 800px;
  margin: 0 auto 3rem;
  text-align: left;
}
.bsr-intro-text p {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--gray-800);
  margin-bottom: 1rem;
}

/* Metrics Row */
.bsr-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  max-width: 640px;
  margin: 0 auto;
}
.bsr-metric {
  background: #fff;
  border: 1px solid var(--konvex-border);
  border-radius: var(--konvex-radius);
  padding: 20px 16px;
  text-align: center;
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}
.bsr-metric:hover {
  transform: translateY(-3px);
  border-color: var(--konvex-accent);
  box-shadow: 0 8px 24px rgba(56,182,255,0.1);
}
.bsr-metric-value {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--konvex-dark);
}
.bsr-val-green { color: #10b981 !important; }
.bsr-val-blue { color: var(--konvex-accent) !important; }
.bsr-val-gold { color: #d97706 !important; }
.bsr-metric-label {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--konvex-gray);
  margin-top: 4px;
}

/* ── Section 3: Construction (Dark) ──────── */
#bsr-construction {
  background: #0a0a0a;
  padding: 80px 24px;
  color: var(--gray-100);
}
#bsr-construction h2 {
  color: var(--konvex-accent);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  margin: 0 0 1.25rem;
  letter-spacing: -0.02em;
}
#bsr-construction p {
  color: var(--gray-500);
  font-size: 1rem;
  line-height: 1.75;
  margin-bottom: 1rem;
}
#bsr-construction strong { color: var(--gray-100); }

.bsr-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 5vw, 80px);
  align-items: center;
  margin-bottom: 3rem;
}
.bsr-visual svg {
  width: 100%;
  height: auto;
  display: block;
}

/* Dark Cards Row */
.bsr-cards-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.bsr-card-dark {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--konvex-radius);
  padding: 24px;
  transition: transform 0.2s, border-color 0.2s;
}
.bsr-card-dark:hover {
  transform: translateY(-3px);
  border-color: rgba(255,255,255,0.2);
}
.bsr-card-dark svg {
  margin-bottom: 12px;
  flex-shrink: 0;
}
.bsr-card-dark h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--gray-100);
  margin: 0 0 8px;
}
.bsr-card-dark p {
  font-size: 0.9rem;
  color: var(--gray-500);
  line-height: 1.6;
  margin: 0;
}
.bsr-card-red { border-top: 3px solid #ef4444; }
.bsr-card-red svg { color: #ef4444; }
.bsr-card-green { border-top: 3px solid #10b981; }
.bsr-card-green svg { color: #10b981; }
.bsr-card-blue { border-top: 3px solid var(--konvex-accent); }
.bsr-card-blue svg { color: var(--konvex-accent); }

/* ── Section 4: Security (Light) ─────────── */
#bsr-security {
  background: #fff;
  padding: 80px 24px;
  text-align: center;
}
#bsr-security .bsr-section-title { margin-bottom: 0.5rem; }

/* Comparison Cards */
.bsr-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 2rem auto;
  max-width: 800px;
  text-align: left;
}
.bsr-compare-card {
  border: 1px solid var(--konvex-border);
  border-radius: var(--konvex-radius);
  padding: 24px;
  background: #fff;
  transition: transform 0.2s, box-shadow 0.2s;
}
.bsr-compare-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.06);
}
.bsr-card-border-blue { border-top: 3px solid var(--konvex-accent); }
.bsr-card-border-green { border-top: 3px solid #10b981; }
.bsr-card-border-red { border-top: 3px solid #ef4444; }
.bsr-compare-card h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--konvex-dark);
  margin: 0 0 12px;
}
.bsr-compare-card ul {
  margin: 0;
  padding-left: 1.2em;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--gray-800);
  list-style: disc;
}

/* Chart Wrapper */
.bsr-chart-wrap {
  background: #f8fafc;
  border: 1px solid var(--konvex-border);
  border-radius: var(--konvex-radius);
  padding: 24px;
  margin: 2rem auto;
  max-width: 640px;
  text-align: center;
}
.bsr-chart-wrap svg {
  width: 100%;
  max-width: 560px;
  height: auto;
}

/* Steps */
.bsr-steps {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 700px;
  margin: 2rem auto;
  text-align: left;
}
.bsr-step {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.bsr-step-num {
  flex-shrink: 0;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--konvex-accent);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.bsr-step-text {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--gray-800);
  padding-top: 4px;
}
.bsr-step-text strong { color: var(--konvex-dark); }

/* ── Section 5: Warning Band ─────────────── */
#bsr-warning {
  background: #fffbeb;
  border-top: 2px solid #f59e0b;
  border-bottom: 2px solid #f59e0b;
  padding: 48px 24px;
}
.bsr-warning-split {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 40px;
  align-items: center;
}
.bsr-warning-text h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: #92400e;
  margin: 0 0 0.75rem;
}
.bsr-warning-text h3 svg { color: #f59e0b; flex-shrink: 0; }
.bsr-warning-text p {
  font-size: 0.95rem;
  line-height: 1.65;
  color: #78350f;
  margin: 0;
}
.bsr-warning-compare {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.bsr-warning-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 10px;
}
.bsr-warning-item svg { flex-shrink: 0; }
.bsr-warning-item strong {
  display: block;
  font-size: 0.9rem;
  color: var(--konvex-dark);
}
.bsr-warning-item span {
  font-size: 0.8rem;
  color: var(--konvex-gray);
}
.bsr-warning-good { background: #f0fdf4; border: 1px solid #bbf7d0; }
.bsr-warning-bad { background: #fef2f2; border: 1px solid #fecaca; }

/* ── Section 6: Yield Comparison (Dark) ──── */
#bsr-yield {
  background: #0a0a0a;
  padding: 80px 24px;
  color: var(--gray-100);
}
#bsr-yield h2 {
  color: var(--konvex-accent);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  margin: 0 0 1.25rem;
  letter-spacing: -0.02em;
}
#bsr-yield p {
  color: var(--gray-500);
  font-size: 1rem;
  line-height: 1.75;
  margin-bottom: 1rem;
}
#bsr-yield strong { color: var(--gray-100); }

/* Insight Strip (dark variant) */
.bsr-insight {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: rgba(56,182,255,0.08);
  border: 1px solid rgba(56,182,255,0.15);
  border-radius: var(--konvex-radius);
  padding: 16px 20px;
  margin-top: 3rem;
  font-size: 0.93rem;
  line-height: 1.6;
  color: #94a3b8;
}
.bsr-insight strong { color: var(--gray-100); }
.bsr-insight-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  background: var(--konvex-accent);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.bsr-insight-icon svg {
  width: 16px;
  height: 16px;
}

/* ── Section 7: Short Box (Light) ────────── */
#bsr-short-box {
  background: var(--gray-100);
  padding: 80px 24px;
  text-align: center;
}
#bsr-short-box .bsr-steps,
#bsr-short-box .bsr-compare { text-align: left; }

/* Danger Alert */
.bsr-alert-danger {
  background: #fef2f2;
  border: 1px solid #fee2e2;
  border-radius: var(--konvex-radius);
  padding: 24px;
  margin: 2rem auto;
  max-width: 700px;
  text-align: left;
}
.bsr-alert-danger h4 {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1rem;
  font-weight: 700;
  color: #991b1b;
  margin: 0 0 8px;
}
.bsr-alert-danger h4 svg { color: #ef4444; flex-shrink: 0; }
.bsr-alert-danger p {
  font-size: 0.93rem;
  line-height: 1.65;
  color: #7f1d1d;
  margin: 0;
}

/* ── Animations ──────────────────────────── */
#bsr-intro.anim-ready .anim-item,
#bsr-construction.anim-ready .anim-item,
#bsr-security.anim-ready .anim-item,
#bsr-yield.anim-ready .anim-item,
#bsr-short-box.anim-ready .anim-item {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
#bsr-intro.anim-ready .anim-item.is-visible,
#bsr-construction.anim-ready .anim-item.is-visible,
#bsr-security.anim-ready .anim-item.is-visible,
#bsr-yield.anim-ready .anim-item.is-visible,
#bsr-short-box.anim-ready .anim-item.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Responsive ──────────────────────────── */
@media (max-width: 900px) {
  .bsr-split { grid-template-columns: 1fr; gap: 40px; }
  .bsr-cards-row { grid-template-columns: 1fr; }
  .bsr-compare { grid-template-columns: 1fr; }
  .bsr-warning-split { grid-template-columns: 1fr; gap: 24px; }
}
/* ── Mode Toggle ─────────────────────────── */
.bsr-mode-toggle {
  display: flex;
  background: rgba(15,23,42,0.6);
  border-radius: 8px;
  padding: 4px;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(255,255,255,0.08);
}
.bsr-mode-btn {
  flex: 1;
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  background: transparent;
  color: #94a3b8;
  font-family: var(--konvex-font);
}
.bsr-mode-btn:hover { color: #cbd5e1; }
.bsr-mode-btn.active {
  background: linear-gradient(to right, #2563eb, #3b82f6);
  color: #fff;
}

/* ── Section 8: Euro-Raum (Dark) ─────────── */
#bsr-europe {
  background: #0a0a0a;
  padding: 80px 24px;
  color: var(--gray-100);
}
.bsr-section-title-dark {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 800;
  color: var(--konvex-accent);
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
  text-align: center;
}
.bsr-section-sub-dark {
  color: var(--gray-500);
  font-size: 1rem;
  max-width: 640px;
  margin: 0 auto 3rem;
  line-height: 1.65;
  text-align: center;
}
.bsr-card-gold { border-top: 3px solid #d97706; }
.bsr-card-gold svg { color: #d97706; }
.bsr-card-dark li {
  font-size: 0.9rem;
  color: var(--gray-500);
  line-height: 1.8;
  margin-bottom: 4px;
}

/* CTA Banner */
.bsr-cta {
  max-width: 640px;
  margin: 3rem auto 0;
  text-align: center;
  background: rgba(56,182,255,0.06);
  border: 1px solid rgba(56,182,255,0.12);
  border-radius: var(--konvex-radius);
  padding: 32px;
}
.bsr-cta p {
  font-size: 1rem;
  line-height: 1.65;
  color: #94a3b8;
  margin: 0 0 1.25rem;
}
.bsr-cta strong { color: var(--gray-100); }
.bsr-cta-btn {
  display: inline-block;
  padding: 12px 30px;
  background: var(--btn-gradient);
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: var(--btn-radius);
  text-decoration: none;
  box-shadow: var(--btn-shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.bsr-cta-btn:hover { transform: translateY(-2px); box-shadow: var(--btn-shadow-hover); color: #fff; }
.bsr-cta-btn:active { transform: scale(0.98); }

/* ── Disclaimer (Section 9) ──────────────── */
#bsr-disclaimer {
  box-sizing: border-box;
  font-family: var(--konvex-font);
  margin: 0;
  padding: 72px 24px;
  background: var(--gray-50);
}
.bsr-disclaimer-card {
  max-width: 760px;
  margin: 0 auto;
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--konvex-radius);
  padding: 32px 36px;
}
.bsr-disclaimer-icon {
  width: 40px;
  height: 40px;
  color: var(--konvex-accent);
  margin-bottom: 12px;
}
.bsr-disclaimer-icon svg { width: 100%; height: 100%; }
.bsr-disclaimer-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--gray-950);
  margin: 0 0 14px;
}
.bsr-disclaimer-card ul {
  list-style: disc;
  padding-left: 20px;
  margin: 0 0 16px;
}
.bsr-disclaimer-card li {
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--gray-700);
  margin-bottom: 8px;
}
.bsr-disclaimer-link {
  font-size: 0.9rem;
  color: var(--gray-500);
  margin: 0;
}
.bsr-disclaimer-link a { color: var(--konvex-accent); text-decoration: none; }
.bsr-disclaimer-link a:hover { text-decoration: underline; }

/* ── Animations (add #bsr-europe, #bsr-disclaimer) ────────── */
#bsr-europe.anim-ready .anim-item,
#bsr-disclaimer.anim-ready .anim-item {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
#bsr-europe.anim-ready .anim-item.is-visible,
#bsr-disclaimer.anim-ready .anim-item.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Responsive ──────────────────────────── */
@media (max-width: 600px) {
  #bsr-hero { padding: 56px 20px; }
  #bsr-intro, #bsr-construction, #bsr-security, #bsr-yield, #bsr-short-box, #bsr-europe, #bsr-disclaimer { padding: 56px 20px; }
  .bsr-disclaimer-card { padding: 24px 20px; }
  .bsr-input-grid { grid-template-columns: 1fr; }
  .bsr-metrics { grid-template-columns: 1fr; max-width: 300px; }
  .bsr-legend { flex-direction: column; align-items: center; }
}

/* KX-SECTION rechner-box-spread END */