/* ===========================================================
   MonteurzimmerGuru Rechner — Design System v2
   =========================================================== */

:root {
  --c-primary: #fd6900;
  --c-primary-dark: #e55f00;
  --c-primary-tint: #fff4ec;
  --c-blue: #0067A0;
  --c-blue-tint: #e8f4fa;
  --c-green: #16a34a;
  --c-green-tint: #e8f9ef;
  --c-red: #dc2626;
  --c-red-tint: #fdecea;
  --c-ink: #0f172a;
  --c-ink-soft: #334155;
  --c-muted: #64748b;
  --c-border: #e2e8f0;
  --c-border-soft: #f1f5f9;
  --c-bg: #ffffff;
  --c-bg-soft: #f8fafc;
  --c-bg-section: #f1f5f9;

  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04), 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow: 0 4px 12px rgba(15, 23, 42, 0.07), 0 2px 4px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.1), 0 8px 16px rgba(15, 23, 42, 0.06);

  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --container: 1200px;
  --container-narrow: 900px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--c-ink-soft);
  background: var(--c-bg);
}
img { max-width: 100%; display: block; }
a { color: var(--c-blue); text-decoration: none; }
a:hover { color: var(--c-primary); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.container--narrow { max-width: var(--container-narrow); }

/* ===========================================================
   Header
   =========================================================== */
.site-header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--c-border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.site-header__logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--c-ink);
  font-weight: 600;
}
.site-header__logo svg { width: 32px; height: 32px; }
.site-header__logo-text { font-size: 17px; letter-spacing: -0.2px; }
.site-header__logo-text strong { color: var(--c-primary); font-weight: 700; }
.site-header__nav {
  display: flex;
  gap: 28px;
  align-items: center;
  font-size: 14px;
  font-weight: 500;
}
.site-header__nav a { color: var(--c-ink-soft); }
.site-header__nav a:hover { color: var(--c-primary); }
@media (max-width: 780px) {
  .site-header__nav { display: none; }
}

/* ===========================================================
   Buttons
   =========================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 15px;
  transition: all 0.2s;
  border: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
}
.btn--primary { background: var(--c-primary); color: #fff; }
.btn--primary:hover { background: var(--c-primary-dark); transform: translateY(-1px); color: #fff; }
.btn--ghost { background: transparent; color: var(--c-ink); border-color: var(--c-border); }
.btn--ghost:hover { border-color: var(--c-primary); color: var(--c-primary); }
.btn--block { width: 100%; }
.btn--lg { padding: 16px 32px; font-size: 16px; }

/* ===========================================================
   Breadcrumb
   =========================================================== */
.breadcrumb {
  padding: 20px 0 0;
  font-size: 13px;
  color: var(--c-muted);
}
.breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.breadcrumb li:not(:last-child)::after { content: "›"; margin-left: 8px; color: var(--c-muted); }
.breadcrumb a { color: var(--c-muted); }
.breadcrumb a:hover { color: var(--c-primary); }
.breadcrumb [aria-current] { color: var(--c-ink); font-weight: 500; }

/* ===========================================================
   Hero (per page)
   =========================================================== */
.page-hero {
  padding: 40px 0 56px;
  background: linear-gradient(180deg, var(--c-bg) 0%, var(--c-bg-soft) 100%);
  border-bottom: 1px solid var(--c-border-soft);
}
.page-hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 100px;
  background: var(--c-primary-tint);
  color: var(--c-primary-dark);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}
.page-hero h1 {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  color: var(--c-ink);
  letter-spacing: -1px;
  line-height: 1.15;
  margin-bottom: 16px;
  max-width: 820px;
}
.page-hero__lead {
  font-size: clamp(16px, 1.5vw, 19px);
  color: var(--c-ink-soft);
  max-width: 780px;
  margin-bottom: 24px;
}
.page-hero__meta {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 14px;
  color: var(--c-muted);
}
.page-hero__meta span { display: inline-flex; align-items: center; gap: 6px; }
.page-hero__meta svg { color: var(--c-green); }

/* ===========================================================
   Calculator
   =========================================================== */
.calc {
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.calc__body {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 0;
}
@media (max-width: 900px) {
  .calc__body { grid-template-columns: 1fr; }
}
.calc__form {
  padding: 32px 36px;
  background: var(--c-bg);
  border-right: 1px solid var(--c-border-soft);
}
@media (max-width: 900px) {
  .calc__form { border-right: none; border-bottom: 1px solid var(--c-border-soft); }
}
.calc__form h2, .calc__form h3 {
  font-size: 18px;
  color: var(--c-ink);
  margin-bottom: 22px;
  letter-spacing: -0.2px;
}
.calc__result {
  padding: 32px 36px;
  background: var(--c-bg-soft);
  min-height: 400px;
}

.form-row {
  margin-bottom: 18px;
}
.form-row__label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: 6px;
}
.form-row__input, .form-row select {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--c-border);
  border-radius: var(--radius);
  font-size: 15px;
  font-family: inherit;
  color: var(--c-ink);
  background: #fff;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.form-row__input:focus, .form-row select:focus {
  outline: none;
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(253, 105, 0, 0.15);
}
.form-row__hint {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  color: var(--c-muted);
}
.form-row--grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
}
@media (max-width: 580px) {
  .form-row--grid { grid-template-columns: 1fr; }
}

/* Result */
.result-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-height: 360px;
  color: var(--c-muted);
  text-align: center;
  padding: 30px;
}
.result-placeholder svg { color: var(--c-border); margin-bottom: 16px; }
.result-placeholder p { font-size: 14px; }

.result-box { animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

.result-highlight {
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-dark) 100%);
  color: #fff;
  padding: 24px;
  border-radius: var(--radius);
  margin-bottom: 24px;
  text-align: center;
}
.result-highlight--green {
  background: linear-gradient(135deg, var(--c-green) 0%, #0e7c38 100%);
}
.result-highlight__label {
  font-size: 13px;
  opacity: 0.9;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}
.result-highlight__value {
  font-size: 38px;
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1;
}
.result-highlight__sub {
  font-size: 13px;
  opacity: 0.9;
  margin-top: 8px;
}

.result-section-title {
  font-size: 12px;
  font-weight: 700;
  color: var(--c-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin: 20px 0 10px;
}
.result-rows { display: flex; flex-direction: column; gap: 8px; }
.result-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 10px 14px;
  background: #fff;
  border-radius: var(--radius-sm);
  border: 1px solid var(--c-border-soft);
  font-size: 14px;
}
.result-row__label { color: var(--c-ink-soft); }
.result-row__value { font-weight: 600; color: var(--c-ink); }
.result-row__value--green { color: var(--c-green); }
.result-row__value--red { color: var(--c-red); }
.result-divider {
  height: 1px;
  background: var(--c-border-soft);
  margin: 18px 0;
}
.result-tip {
  background: var(--c-primary-tint);
  border-left: 3px solid var(--c-primary);
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  margin-top: 18px;
  color: var(--c-ink-soft);
}
.result-tip--red { background: var(--c-red-tint); border-left-color: var(--c-red); }

/* ===========================================================
   Bar chart (Kostenvergleich)
   =========================================================== */
.result-bar-group { margin-bottom: 14px; }
.result-bar-label {
  display: flex; justify-content: space-between; align-items: baseline;
  font-size: 13px; margin-bottom: 4px;
}
.result-bar-label__name { color: var(--c-ink); font-weight: 600; display: inline-flex; align-items: center; gap: 8px; }
.result-bar-label__value { color: var(--c-ink); font-weight: 700; font-size: 14px; }
.result-bar {
  background: var(--c-border-soft);
  border-radius: 6px;
  height: 28px;
  overflow: hidden;
  position: relative;
}
.result-bar__fill {
  height: 100%;
  display: flex; align-items: center; justify-content: flex-end;
  padding: 0 10px;
  color: #fff; font-size: 12px; font-weight: 700;
  border-radius: 6px;
  transition: width 0.4s ease;
}
.result-bar__fill--orange { background: linear-gradient(90deg, #fd6900, #e55f00); }
.result-bar__fill--red    { background: linear-gradient(90deg, #dc2626, #991b1b); }
.result-bar__fill--blue   { background: linear-gradient(90deg, #0067A0, #004d7a); }
.result-bar__fill--green  { background: linear-gradient(90deg, #16a34a, #0e7c38); }
.result-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 100px;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}
.result-badge--best { background: var(--c-green-tint); color: var(--c-green); }
.result-badge--worst { background: var(--c-red-tint); color: var(--c-red); }

/* Checkbox list */
.check-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
@media (max-width: 560px) { .check-grid { grid-template-columns: 1fr; } }
.check-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1.5px solid var(--c-border);
  border-radius: var(--radius-sm);
  background: #fff;
  cursor: pointer;
  font-size: 13px;
  color: var(--c-ink-soft);
  transition: all 0.15s;
}
.check-item input { cursor: pointer; accent-color: var(--c-primary); }
.check-item:hover { border-color: var(--c-primary); }
.check-item:has(input:checked) { border-color: var(--c-primary); background: var(--c-primary-tint); color: var(--c-ink); }

/* ===========================================================
   Page sections
   =========================================================== */
.section {
  padding: 64px 0;
}
.section--soft { background: var(--c-bg-soft); }
.section__head {
  max-width: 720px;
  margin: 0 auto 40px;
  text-align: center;
}
.section__eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: var(--c-primary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}
.section__head h2 {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 800;
  color: var(--c-ink);
  letter-spacing: -0.8px;
  line-height: 1.2;
  margin-bottom: 12px;
}
.section__head p { color: var(--c-muted); font-size: 17px; }

/* Prose */
.prose {
  max-width: 760px;
  margin: 0 auto;
}
.prose h3 {
  font-size: 22px;
  color: var(--c-ink);
  margin: 32px 0 12px;
  letter-spacing: -0.3px;
}
.prose h3:first-child { margin-top: 0; }
.prose p { margin-bottom: 14px; font-size: 16px; }
.prose ul { margin: 10px 0 18px 22px; }
.prose li { margin-bottom: 6px; }

/* Example calc */
.example-box {
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 24px 28px;
  margin-top: 16px;
  box-shadow: var(--shadow-sm);
}
.example-box h4 {
  font-size: 15px;
  color: var(--c-primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}
.example-box table { width: 100%; font-size: 14px; border-collapse: collapse; }
.example-box td { padding: 8px 0; border-bottom: 1px dashed var(--c-border-soft); }
.example-box td:last-child { text-align: right; font-weight: 600; color: var(--c-ink); }
.example-box tr.total td { border-bottom: none; border-top: 2px solid var(--c-ink); padding-top: 12px; font-size: 16px; }

/* FAQ */
.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow 0.2s, border-color 0.2s;
}
.faq-item:hover { border-color: var(--c-border); box-shadow: var(--shadow-sm); }
.faq-item[open] { border-color: var(--c-primary); box-shadow: var(--shadow-sm); }
.faq-item summary {
  padding: 18px 22px;
  cursor: pointer;
  font-weight: 600;
  font-size: 15px;
  color: var(--c-ink);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-size: 22px;
  color: var(--c-primary);
  transition: transform 0.2s;
  flex-shrink: 0;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item__body {
  padding: 0 22px 18px;
  font-size: 15px;
  color: var(--c-ink-soft);
}
.faq-item__body p { margin-bottom: 10px; }

/* Related calcs */
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 24px;
}
@media (max-width: 800px) {
  .related-grid { grid-template-columns: 1fr; }
}
.related-card {
  display: block;
  padding: 24px 26px;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  transition: all 0.2s;
  color: var(--c-ink);
}
.related-card:hover {
  border-color: var(--c-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  color: var(--c-ink);
}
.related-card__icon {
  width: 40px; height: 40px;
  background: var(--c-primary-tint);
  color: var(--c-primary);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 12px;
}
.related-card__title {
  font-size: 16px;
  font-weight: 700;
  color: var(--c-ink);
  margin-bottom: 4px;
}
.related-card__desc { font-size: 13px; color: var(--c-muted); }

/* CTA to marketplace */
.cta-banner {
  padding: 40px;
  background: linear-gradient(135deg, var(--c-blue) 0%, #004d7a 100%);
  color: #fff;
  border-radius: var(--radius-lg);
  text-align: center;
}
.cta-banner h3 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 10px;
  letter-spacing: -0.3px;
}
.cta-banner p { opacity: 0.92; margin-bottom: 18px; max-width: 560px; margin-left: auto; margin-right: auto; }
.cta-banner .btn--primary { background: #fff; color: var(--c-blue); }
.cta-banner .btn--primary:hover { background: var(--c-primary-tint); color: var(--c-blue); }

/* ===========================================================
   Footer
   =========================================================== */
.site-footer {
  background: var(--c-ink);
  color: #cbd5e1;
  padding: 56px 0 24px;
  font-size: 14px;
}
.site-footer a { color: #cbd5e1; }
.site-footer a:hover { color: var(--c-primary); }
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid #334155;
  margin-bottom: 20px;
}
@media (max-width: 800px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.footer-brand p { color: #94a3b8; max-width: 360px; }
.footer-col h4 { color: #fff; font-size: 14px; margin-bottom: 12px; text-transform: uppercase; letter-spacing: 0.5px; }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  color: #64748b;
  font-size: 13px;
}

/* ===========================================================
   Widget (embedded) mode — minimal chrome
   =========================================================== */
html.is-embed body { background: transparent; padding: 16px; }
html.is-embed .site-header,
html.is-embed .site-footer,
html.is-embed .page-hero,
html.is-embed .section:not(.section--calc),
html.is-embed .breadcrumb { display: none; }
html.is-embed .section--calc { padding: 0; }
html.is-embed .calc { box-shadow: none; border-radius: var(--radius); }
html.is-embed .embed-credit {
  margin-top: 12px;
  padding: 10px 14px;
  background: var(--c-bg-soft);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--c-muted);
  text-align: center;
}
html.is-embed .embed-credit a {
  color: var(--c-primary);
  font-weight: 600;
}
html:not(.is-embed) .embed-credit { display: none; }

/* Theme variants (for widget customization) */
html.is-embed[data-theme="dark"] body { color: #e2e8f0; }
html.is-embed[data-theme="dark"] .calc {
  background: #1e293b;
  border-color: #334155;
}
html.is-embed[data-theme="dark"] .calc__form { background: #1e293b; border-right-color: #334155; }
html.is-embed[data-theme="dark"] .calc__result { background: #0f172a; }
html.is-embed[data-theme="dark"] .form-row__label { color: #e2e8f0; }
html.is-embed[data-theme="dark"] .form-row__input,
html.is-embed[data-theme="dark"] .form-row select {
  background: #0f172a; color: #e2e8f0; border-color: #334155;
}
html.is-embed[data-theme="dark"] .result-row { background: #1e293b; border-color: #334155; }
html.is-embed[data-theme="dark"] .result-row__label { color: #94a3b8; }
html.is-embed[data-theme="dark"] .result-row__value { color: #e2e8f0; }
html.is-embed[data-theme="dark"] .embed-credit { background: #1e293b; border-color: #334155; }

/* Utilities */
.mt-0 { margin-top: 0; }
.mt-4 { margin-top: 32px; }
.center { text-align: center; }
.visually-hidden { position: absolute; left: -9999px; }