/* ==========================================================================
   Viziba — AI-Sichtbarkeit für Treuhandkanzleien
   Stylesheet
   ========================================================================== */

/* Design tokens
   -------------------------------------------------------------------------- */
:root {
  --color-bg:        #FAFAF8;
  --color-surface:   #FFFFFF;
  --color-accent:    #1B3A5C;
  --color-accent-dk: #142C46;
  --color-heading:   #1A2433;
  --color-text:      #20242B;
  --color-muted:     #5A6068;
  --color-faint:     #8A9098;
  --color-line:      #E7E5E0;

  --font-serif: "Source Serif 4", Georgia, serif;
  --font-sans:  "Helvetica Neue", Helvetica, Arial, sans-serif;

  --maxw:     1080px;
  --maxw-narrow: 760px;
  --section-y: 88px;
}

/* Reset / base
   -------------------------------------------------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 {
  font-family: var(--font-serif);
  color: var(--color-heading);
  margin: 0;
  text-wrap: pretty;
}

p { margin: 0; text-wrap: pretty; }

a { color: inherit; }

img { max-width: 100%; display: block; }

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

.container--narrow { max-width: var(--maxw-narrow); }

.section      { padding-block: var(--section-y); }
.section--white {
  background: var(--color-surface);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.eyebrow {
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  font-weight: 500;
  margin-bottom: 16px;
}

.section-title {
  font-weight: 500;
  font-size: clamp(26px, 3vw, 34px);
  line-height: 1.25;
  max-width: 640px;
}

/* Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-block;
  font: 500 16px/1 var(--font-sans);
  letter-spacing: 0.01em;
  padding: 16px 32px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  text-decoration: none;
  background: var(--color-accent);
  color: #fff;
  transition: background 0.15s ease;
}
.btn:hover { background: var(--color-accent-dk); }
.btn--block { width: 100%; padding-inline: 24px; }

/* Header
   -------------------------------------------------------------------------- */
.site-header {
  border-bottom: 1px solid var(--color-line);
  background: var(--color-bg);
}
.site-header__inner {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  padding-block: 20px;
}
.brand {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-accent);
}
.brand-row { display: flex; align-items: baseline; gap: 16px; flex-wrap: wrap; }
.brand-tag { font-size: 13px; color: var(--color-muted); }
.header-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid var(--color-accent);
  padding-bottom: 2px;
}
.header-link:hover { color: var(--color-accent-dk); }

/* Hero
   -------------------------------------------------------------------------- */
.hero__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 64px;
  align-items: center;
  padding-block: 88px 96px;
}
.hero__copy { flex: 1 1 460px; min-width: 0; }
.hero__title {
  font-weight: 500;
  font-size: clamp(30px, 4.2vw, 46px);
  line-height: 1.18;
  margin-bottom: 24px;
}
.hero__lead {
  font-size: 18px;
  line-height: 1.65;
  color: #4A5058;
  margin-bottom: 36px;
  max-width: 560px;
}
.hero__cta-row {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.hero__cta-note { font-size: 13px; color: var(--color-faint); }
.hero__visual { flex: 1 1 380px; max-width: 480px; min-width: 0; }

/* AI answer card
   -------------------------------------------------------------------------- */
.ai-card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: 8px;
  box-shadow: 0 1px 3px rgba(26,36,51,.06), 0 12px 32px rgba(26,36,51,.06);
  overflow: hidden;
}
.ai-card__head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 20px;
  border-bottom: 1px solid #EEECE7;
}
.ai-card__dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
}
.ai-card__label {
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
  font-weight: 500;
}
.ai-card__body { padding: 24px 20px 20px; }
.ai-card__question {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 20px;
}
.ai-card__bubble {
  background: #F1F0EC;
  border-radius: 12px 12px 2px 12px;
  padding: 12px 16px;
  font-size: 14.5px;
  line-height: 1.5;
  color: #33383F;
  max-width: 85%;
}
.ai-card__intro {
  font-size: 14.5px;
  line-height: 1.6;
  color: #4A5058;
  margin-bottom: 14px;
}
.ai-list { display: flex; flex-direction: column; gap: 8px; }
.ai-list__item {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 10px 14px;
  background: #F8F7F4;
  border-radius: 6px;
}
.ai-list__item--empty {
  background: transparent;
  border: 1px dashed #C9CDD2;
}
.ai-list__num { font-family: var(--font-serif); font-size: 14px; color: var(--color-faint); }
.ai-list__name { font-size: 14.5px; color: #33383F; }
.ai-list__item--empty .ai-list__num  { color: #B0B5BB; }
.ai-list__item--empty .ai-list__name { color: var(--color-faint); font-style: italic; }
.ai-card__caption {
  font-size: 12.5px;
  color: var(--color-faint);
  margin-top: 12px;
  text-align: center;
}

/* Problem grid
   -------------------------------------------------------------------------- */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 48px;
  margin-top: 56px;
}
.problem__num {
  font-family: var(--font-serif);
  font-size: 18px;
  color: #B0B5BB;
  margin-bottom: 14px;
}
.problem__title { font-weight: 600; font-size: 20px; margin-bottom: 12px; }
.problem__text  { font-size: 15.5px; line-height: 1.65; color: var(--color-muted); }

/* Steps
   -------------------------------------------------------------------------- */
.steps { margin-top: 56px; }
.step {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
  padding-block: 32px;
  border-top: 1px solid var(--color-line);
}
.step:last-child { border-bottom: 1px solid var(--color-line); }
.step__head {
  flex: 0 0 200px;
  display: flex;
  gap: 16px;
  align-items: baseline;
}
.step__num   { font-family: var(--font-serif); font-size: 17px; color: var(--color-accent); }
.step__title { font-weight: 600; font-size: 21px; }
.step__text  { flex: 1 1 400px; font-size: 15.5px; line-height: 1.65; color: var(--color-muted); }

/* Offer
   -------------------------------------------------------------------------- */
.offer__inner {
  display: flex;
  gap: 64px;
  flex-wrap: wrap;
  align-items: flex-start;
}
.offer__intro { flex: 1 1 380px; min-width: 0; }
.offer__intro .section-title { margin-bottom: 20px; }
.offer__intro p { font-size: 16px; line-height: 1.65; color: var(--color-muted); max-width: 480px; }

.price-card {
  flex: 1 1 380px;
  max-width: 460px;
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: 8px;
  padding: 36px 36px 32px;
}
.price-card__label {
  font-size: 13px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-muted);
  font-weight: 500;
  margin-bottom: 10px;
}
.price-card__price {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}
.price-card__amount { font-family: var(--font-serif); font-weight: 600; font-size: 40px; color: var(--color-heading); }
.price-card__per    { font-size: 16px; color: var(--color-muted); }
.price-card__terms  { font-size: 14px; color: var(--color-muted); margin-bottom: 28px; }
.price-card__list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  border-top: 1px solid var(--color-line);
  padding-top: 24px;
}
.price-card__item { display: flex; gap: 12px; align-items: baseline; }
.price-card__dash { color: var(--color-accent); font-size: 14px; }
.price-card__item span:last-child { font-size: 15px; line-height: 1.55; color: #33383F; }

/* Credibility
   -------------------------------------------------------------------------- */
.about__inner { display: flex; gap: 64px; flex-wrap: wrap; }
.about__head  { flex: 0 1 280px; }
.about__head .section-title { margin: 0; }
.about__body  { flex: 1 1 420px; min-width: 0; display: flex; flex-direction: column; gap: 20px; }
.about__body p { font-size: 16.5px; line-height: 1.7; color: #4A5058; }

/* FAQ
   -------------------------------------------------------------------------- */
.faq { border-top: 1px solid var(--color-line); margin-top: 40px; }
.faq__item { border-bottom: 1px solid var(--color-line); }
.faq__item summary {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  padding: 22px 4px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 18px;
  color: var(--color-heading);
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary:hover { background: var(--color-bg); }
.faq__icon {
  font-family: var(--font-serif);
  font-size: 22px;
  color: var(--color-accent);
  line-height: 1;
  flex-shrink: 0;
}
.faq__icon::before { content: "+"; }
.faq__item[open] .faq__icon::before { content: "\2212"; } /* minus */
.faq__answer {
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--color-muted);
  padding: 0 4px 24px;
}

/* Final CTA
   -------------------------------------------------------------------------- */
.cta { background: var(--color-accent); }
.cta__inner {
  display: flex;
  gap: 64px;
  flex-wrap: wrap;
  align-items: center;
  padding-block: 96px;
}
.cta__copy { flex: 1 1 400px; min-width: 0; }
.cta__title {
  color: #fff;
  font-weight: 500;
  font-size: clamp(28px, 3.4vw, 38px);
  line-height: 1.22;
  margin-bottom: 20px;
}
.cta__lead {
  font-size: 17px;
  line-height: 1.65;
  color: #B9C6D4;
  margin-bottom: 28px;
  max-width: 480px;
}
.cta__points { display: flex; flex-direction: column; gap: 10px; }
.cta__point { display: flex; gap: 12px; align-items: baseline; }
.cta__point span:first-child { color: #7E96AE; font-size: 13px; }
.cta__point span:last-child  { font-size: 15px; color: #D5DDE6; }

.cta__form-wrap { flex: 1 1 380px; max-width: 460px; }

/* Form
   -------------------------------------------------------------------------- */
.form {
  background: var(--color-surface);
  border-radius: 8px;
  padding: 36px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.form__field { display: flex; flex-direction: column; gap: 8px; }
.form__label {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: #33383F;
}
.form__input {
  font: 15.5px var(--font-sans);
  padding: 13px 14px;
  border: 1px solid #C9CDD2;
  border-radius: 4px;
  color: var(--color-text);
  background: #fff;
  outline: none;
  width: 100%;
}
.form__input::placeholder { color: #9BA1A8; }
.form__input:focus { border-color: var(--color-accent); }
.form__note { font-size: 12.5px; color: var(--color-faint); text-align: center; line-height: 1.5; }

/* visually hidden honeypot */
.hp {
  position: absolute !important;
  left: -9999px;
  width: 1px; height: 1px;
  opacity: 0;
}

/* Footer
   -------------------------------------------------------------------------- */
.site-footer {
  background: var(--color-bg);
  border-top: 1px solid var(--color-line);
}
.site-footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  flex-wrap: wrap;
  padding-block: 32px;
}
.footer-brand { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; }
.footer-brand__name {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-accent);
}
.footer-brand__place { font-size: 13.5px; color: var(--color-faint); }
.footer-links { display: flex; align-items: baseline; gap: 24px; flex-wrap: wrap; }
.footer-links a { font-size: 13px; color: var(--color-muted); text-decoration: none; }
.footer-links a:hover { color: var(--color-accent); }
.footer-links span  { font-size: 13px; color: #9BA1A8; }