/* ============================================
   bkv-strategie.com — Design System
   Petrol palette from Brangenberg Logo
   ============================================ */

:root {
  --primary-dark: #006080;
  --primary: #0a8db9;
  --primary-light: #40a0c0;
  --bg: #ffffff;
  --surface: #F5F7F9;
  --text: #1a1a1a;
  --text-secondary: #6b7280;
  --accent: #0a8db9;
  --accent-hover: #006080;
  --border: #E0E4E8;
  --success: #10B981;
  --success-bg: #ECFDF5;
  --warning: #F59E0B;
  --warning-bg: #FFFBEB;
  --muted: #D1D5DB;
  --muted-bg: #F3F4F6;
  --dark-bg: #0f1f2e;
  --dark-text: #e8ecf0;
  --radius: 6px;
  --radius-lg: 12px;
  --max-width: 1200px;
  --max-text: 800px;
  --section-pad: 120px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  font-family: var(--font);
  font-size: 18px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--accent-hover); }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }

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

.section {
  padding: var(--section-pad) 0;
}
.section--surface { background: var(--surface); }
.section--dark { background: var(--dark-bg); color: var(--dark-text); }

.section__title {
  font-size: clamp(30px, 4.5vw, 44px);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
  color: var(--text);
}
.section__title + * { margin-top: 56px; }
.section__title + .section__intro { margin-top: 0; }
.section__title--light { color: var(--dark-text); }
.section__title--left { text-align: left; }
.section__intro {
  font-size: 20px;
  color: var(--text-secondary);
  margin-bottom: 48px;
  max-width: var(--max-text);
}
.section__text--light {
  color: var(--dark-text);
  opacity: 0.9;
  margin-bottom: 24px;
}

/* ---- Navigation ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: 72px;
}
.nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.nav__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
}
.nav__logo { width: auto; height: 36px; }
.nav__brand-text {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.nav__links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav__links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.2s;
}
.nav__links a:hover { color: var(--text); }
.nav__cta {
  background: transparent;
  color: var(--primary) !important;
  padding: 8px 20px;
  border-radius: var(--radius);
  border: 1.5px solid var(--primary);
  transition: all 0.2s;
  font-weight: 600;
}
.nav__cta:hover { background: var(--accent); color: #fff !important; border-color: var(--accent); }

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav__toggle span {
  width: 24px;
  height: 2px;
  background: var(--text);
  transition: 0.3s;
}

/* ---- Buttons ---- */
.btn {
  display: inline-block;
  font-family: var(--font);
  font-size: 16px;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
}
.btn--primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  box-shadow: 0 2px 8px rgba(10,141,185,0.25);
}
.btn--primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #fff;
  box-shadow: 0 4px 16px rgba(10,141,185,0.35);
  transform: translateY(-1px);
}
.btn--outline {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent);
}
.btn--outline:hover {
  background: var(--accent);
  color: #fff;
}
.btn--ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border);
}
.btn--ghost:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: transparent;
}
.btn--large { padding: 18px 44px; font-size: 18px; letter-spacing: 0.01em; }
.btn--small { padding: 10px 20px; font-size: 14px; }

/* ---- Hero ---- */
.hero {
  position: relative;
  padding: 160px 0 var(--section-pad);
  min-height: 80vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 80% 20%, rgba(10,141,185,0.06) 0%, transparent 60%),
    radial-gradient(ellipse at 20% 80%, rgba(0,96,128,0.04) 0%, transparent 60%);
}
.hero__title {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 700;
  line-height: 1.15;
  max-width: 900px;
  margin-bottom: 28px;
  position: relative;
}
.hero__title-accent {
  color: var(--primary-dark);
}
.hero__points {
  list-style: none;
  padding: 0;
  margin-bottom: 32px;
  position: relative;
}
.hero__points li {
  font-size: clamp(18px, 2.5vw, 22px);
  font-weight: 500;
  color: var(--text);
  padding: 6px 0;
  opacity: 0.85;
}
.hero__sub {
  font-size: clamp(17px, 2vw, 20px);
  color: var(--text-secondary);
  max-width: 700px;
  margin-bottom: 16px;
  position: relative;
}
.hero__claim {
  font-size: 17px;
  color: var(--primary-dark);
  font-weight: 600;
  margin-bottom: 44px;
  position: relative;
  letter-spacing: -0.01em;
}
.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  position: relative;
}

/* ---- Problems (Section 2) ---- */
.problems {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 40px;
  margin-bottom: 48px;
}
.problems__item {
  padding: 28px 0;
  border-top: 2px solid var(--border);
}
.problems__number {
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}
.problems__item h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}
.problems__item p {
  color: var(--text-secondary);
  font-size: 16px;
}
.problems__consequence {
  font-size: 17px;
  font-weight: 500;
  color: var(--text-secondary);
  max-width: var(--max-text);
  margin-bottom: 48px;
  line-height: 1.7;
}
.complexity-chart { max-width: 600px; margin: 0 auto; }
.complexity-chart__svg { width: 100%; height: auto; }
.complexity-chart__label {
  font-family: var(--font);
  font-size: 11px;
  fill: var(--text-secondary);
}
.complexity-chart__label--title {
  font-size: 12px;
  fill: var(--primary);
  font-weight: 600;
  text-anchor: middle;
}

/* ---- Schnell-Check (Section 3) ---- */
.check {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 48px;
  border: 1px solid var(--border);
}
.check__question {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 24px;
}
.check__options {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.check__options--vertical { flex-direction: column; }
.check__btn {
  font-family: var(--font);
  font-size: 16px;
  font-weight: 500;
  padding: 14px 24px;
  background: var(--bg);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s;
  text-align: left;
}
.check__btn:hover {
  border-color: var(--primary);
  background: rgba(10,141,185,0.04);
}
.check__btn--selected {
  border-color: var(--primary);
  background: rgba(10,141,185,0.08);
  color: var(--primary-dark);
}
.check__progress {
  margin-top: 32px;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}
.check__progress-bar {
  height: 100%;
  background: var(--primary);
  width: 0%;
  transition: width 0.4s ease;
}
.check__result {
  text-align: center;
  padding: 32px 0 0;
}
.check__result-icon { font-size: 48px; margin-bottom: 16px; }
.check__result-text {
  font-size: 20px;
  font-weight: 500;
  max-width: 500px;
  margin: 0 auto 24px;
}

/* ---- Matrix (Section 4) ---- */
.matrix {
  display: grid;
  grid-template-columns: 160px repeat(3, 1fr);
  gap: 2px;
  margin-bottom: 48px;
  max-width: 800px;
}
.matrix__corner { background: transparent; }
.matrix__col-header {
  background: var(--primary-dark);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  padding: 14px 12px;
  text-align: center;
  border-radius: var(--radius) var(--radius) 0 0;
}
.matrix__row-header {
  background: var(--surface);
  font-size: 14px;
  font-weight: 600;
  padding: 16px 12px;
  display: flex;
  align-items: center;
  border-right: 2px solid var(--border);
}
.matrix__cell {
  padding: 16px 12px;
  text-align: center;
  font-size: 14px;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
}
.matrix__cell--success { background: var(--success-bg); color: #065F46; }
.matrix__cell--strong { font-weight: 700; }
.matrix__cell--warning { background: var(--warning-bg); color: #92400E; }
.matrix__cell--muted { background: var(--muted-bg); color: #6B7280; }

.antisell {
  background: var(--surface);
  border-left: 3px solid var(--primary);
  padding: 24px 32px;
  border-radius: 0 var(--radius) var(--radius) 0;
  max-width: 600px;
}
.antisell h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
}
.antisell ul { padding-left: 0; margin-bottom: 12px; }
.antisell li {
  padding: 4px 0 4px 20px;
  position: relative;
  color: var(--text-secondary);
  font-size: 16px;
}
.antisell li::before {
  content: "\2014";
  position: absolute;
  left: 0;
  color: var(--muted);
}
.antisell p { font-size: 16px; color: var(--text-secondary); }

/* ---- Timeline (Section 5) ---- */
.timeline {
  position: relative;
  max-width: 700px;
  margin: 48px auto;
  padding-left: 48px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 19px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border);
}
.timeline__item {
  position: relative;
  padding-bottom: 40px;
  display: flex;
  gap: 24px;
  align-items: flex-start;
}
.timeline__item:last-child { padding-bottom: 0; }
.timeline__node {
  position: absolute;
  left: -48px;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
  flex-shrink: 0;
}
.timeline__content h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 4px;
}
.timeline__content p {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.timeline__duration {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: rgba(10,141,185,0.08);
  padding: 2px 10px;
  border-radius: 20px;
}
.timeline__total {
  text-align: center;
  font-size: 18px;
  font-weight: 600;
  color: var(--primary-dark);
  margin-top: 16px;
}

/* ---- Relief (Section 6) ---- */
.relief {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  margin-bottom: 56px;
}
.relief__item {
  padding: 24px;
  background: var(--bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.relief__item h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--primary-dark);
}
.relief__item p { font-size: 15px; color: var(--text-secondary); }

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 32px;
  padding: 40px;
  background: var(--bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}
.stats__item { text-align: center; }
.stats__number {
  display: block;
  font-size: 36px;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 4px;
}
.stats__label {
  display: block;
  font-size: 15px;
  color: var(--text);
  margin-bottom: 4px;
}
.stats__source {
  display: block;
  font-size: 12px;
  color: var(--text-secondary);
}

/* ---- Governance (Section 7) ---- */
.governance {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  margin-bottom: 40px;
}
.governance__pillar {
  padding: 32px;
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  border-top: 3px solid var(--primary);
  transition: box-shadow 0.2s;
}
.governance__pillar:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.06);
}
.governance__pillar h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 12px;
}
.governance__pillar li {
  padding: 6px 0;
  font-size: 15px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}
.governance__pillar li:last-child { border-bottom: none; }
.governance__promise {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: var(--max-text);
  font-style: italic;
}

/* ---- Cases (Section 8) ---- */
.cases {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 32px;
}
.cases__item {
  background: var(--bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
}
.cases__header {
  padding: 20px 28px;
  background: var(--primary-dark);
  color: #fff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.cases__type { font-weight: 600; font-size: 16px; }
.cases__meta { font-size: 14px; opacity: 0.8; }
.cases__body { padding: 32px; }
.cases__block { margin-bottom: 20px; padding: 16px 0; border-bottom: 1px solid var(--border); }
.cases__block:last-child { margin-bottom: 0; border-bottom: none; padding-bottom: 0; }
.cases__block h4 {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--primary);
  margin-bottom: 4px;
}
.cases__block p { font-size: 16px; color: var(--text-secondary); }

/* ---- Anti-Sell Dark (Section 9) ---- */
.antisell-list {
  margin-bottom: 24px;
  padding-left: 0;
}
.antisell-list li {
  padding: 8px 0 8px 24px;
  position: relative;
  font-size: 18px;
  opacity: 0.9;
}
.antisell-list li::before {
  content: "\2014";
  position: absolute;
  left: 0;
  color: var(--primary-light);
}

/* ---- CTA Split (Section 10) ---- */
.cta-split {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 64px;
  align-items: start;
}
.cta-split__sub {
  font-size: 20px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}
.cta-split__detail {
  font-weight: 600;
  margin-bottom: 8px;
}
.cta-split__list {
  margin-bottom: 24px;
}
.cta-split__list li {
  padding: 6px 0 6px 20px;
  position: relative;
  font-size: 16px;
  color: var(--text-secondary);
}
.cta-split__list li::before {
  content: "\2713";
  position: absolute;
  left: 0;
  color: var(--success);
  font-weight: 700;
}
.cta-split__highlight {
  font-size: 16px;
  font-weight: 600;
  color: var(--primary-dark);
  padding: 16px 20px;
  background: rgba(10,141,185,0.06);
  border-left: 3px solid var(--primary);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin-bottom: 16px;
}
.cta-split__trust {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}
.cta-split__phone {
  margin-top: 20px;
  font-size: 15px;
  color: var(--text-secondary);
}
.cta-split__phone a {
  font-weight: 600;
  color: var(--primary-dark);
}

/* Person column */
.cta-split__person { text-align: center; position: sticky; top: 100px; }
.cta-split__portrait {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  overflow: hidden;
  margin: 0 auto 16px;
  border: 3px solid var(--border);
}
.cta-split__portrait img { width: 100%; height: 100%; object-fit: cover; object-position: center top; }
.cta-split__name { font-size: 18px; font-weight: 700; margin-bottom: 4px; }
.cta-split__role { font-size: 14px; color: var(--text-secondary); line-height: 1.5; }

/* ---- Form ---- */
.form { margin-top: 8px; }
.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 12px;
}
.form__input {
  font-family: var(--font);
  font-size: 16px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  transition: border-color 0.2s;
  width: 100%;
}
.form__input:focus {
  outline: none;
  border-color: var(--primary);
}
.form__input--full { margin-bottom: 12px; }
.form__checkbox {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 20px;
  cursor: pointer;
}
.form__checkbox input { margin-top: 4px; flex-shrink: 0; }
.form__success {
  padding: 20px;
  background: var(--success-bg);
  border-radius: var(--radius);
  color: #065F46;
  font-weight: 500;
  margin-top: 16px;
}

/* ---- Footer ---- */
.footer {
  padding: 48px 0;
  border-top: 1px solid var(--border);
}
.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 24px;
}
.footer__name { font-weight: 700; font-size: 16px; margin-bottom: 2px; }
.footer__company { font-size: 14px; color: var(--text-secondary); }
.footer__contact { font-size: 14px; color: var(--text-secondary); }
.footer__contact a { color: var(--text-secondary); }
.footer__contact a:hover { color: var(--primary); }
.footer__legal { display: flex; gap: 24px; }
.footer__legal a {
  font-size: 14px;
  color: var(--text-secondary);
}
.footer__legal a:hover { color: var(--primary); }

/* ---- Cookie Banner ---- */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: rgba(15,31,46,0.95);
  backdrop-filter: blur(8px);
  color: var(--dark-text);
  padding: 14px 0;
  box-shadow: 0 -2px 12px rgba(0,0,0,0.08);
}
.cookie-banner__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.cookie-banner__inner p { font-size: 13px; max-width: 500px; opacity: 0.9; }
.cookie-banner__actions { display: flex; gap: 12px; flex-shrink: 0; }
.cookie-banner .btn--small { padding: 8px 16px; font-size: 13px; }
.cookie-banner .btn--outline {
  color: var(--dark-text);
  border-color: rgba(255,255,255,0.3);
}
.cookie-banner .btn--outline:hover {
  background: rgba(255,255,255,0.1);
  color: #fff;
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
  :root { --section-pad: 80px; }

  .nav__links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  }
  .nav__links.active { display: flex; }
  .nav__toggle { display: flex; }

  .hero { padding: 120px 0 64px; min-height: auto; }
  .hero__title { font-size: 28px; }
  .hero__points li { font-size: 17px; }

  .check { padding: 28px 20px; }
  .check__options { flex-direction: column; }

  .matrix {
    grid-template-columns: 100px repeat(3, 1fr);
    font-size: 12px;
  }
  .matrix__row-header { font-size: 12px; padding: 10px 8px; }
  .matrix__col-header { font-size: 12px; padding: 10px 6px; }
  .matrix__cell { font-size: 12px; padding: 10px 6px; }

  .timeline { padding-left: 40px; }
  .timeline__node { left: -40px; width: 32px; height: 32px; font-size: 13px; }
  .timeline::before { left: 15px; }

  .cases { grid-template-columns: 1fr; }

  .cta-split {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .cta-split__person { order: -1; position: static; }
  .form__row { grid-template-columns: 1fr; }

  .footer__inner { flex-direction: column; }

  .cookie-banner__inner { flex-direction: column; text-align: center; }
}