/* AI Knowledge Center — Landing Page v7 styles (ported verbatim from the approved design). */
:root {
  --teal:      #0E7C6F;
  --teal-2:    #0A6359;
  --teal-50:   #E6F2F0;
  --teal-100:  #C7E3DE;
  --navy:      #14233C;
  --navy-2:    #21344F;
  /* second accent: warm coral-amber, ties to the logo orange */
  --orange:    #F0851F;
  --orange-2:  #D9700E;
  --orange-50: #FDF1E3;
  --orange-100:#F8DCBE;
  --ink:       #14233C;
  --ink-2:     #3A4660;
  --muted:     #69728A;
  --muted-2:   #97A0B4;

  /* warm sand stage, crisp white panels with defined edges */
  /* full-bleed section tints */
  --sec-white: #FFFFFF;
  --sec-teal:  #E9F2EF;
  --sec-sand:  #F3EEE3;

  --page:      #FFFFFF;
  --page-2:    #E6E1D6;
  --panel:     #FFFFFF;
  --card:      #FFFFFF;
  --soft:      #F4F1EA;   /* warm faint fill for tiles / info bars */
  --hairline:  #E6E1D7;
  --hairline-2:#D8D2C6;
  --ink-line:  #ECE7DD;   /* soft hairline, no hard ink edges */
  --line-soft: #ECE8DF;

  --r-md: 14px;
  --r-lg: 18px;
  --r-xl: 26px;

  --shadow-card: 0 1px 2px rgba(20,35,60,.04), 0 8px 20px -12px rgba(20,35,60,.14);
  --shadow-panel: 0 1px 3px rgba(20,35,60,.04), 0 30px 60px -34px rgba(20,35,60,.26);
  --shadow-soft: 0 6px 16px -6px rgba(20,35,60,.12), 0 18px 40px -20px rgba(20,35,60,.22);
  --shadow-hard: 0 10px 30px -12px rgba(20,35,60,.30);

  --font-sans: 'Hanken Grotesk', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-display: 'Manrope', 'Hanken Grotesk', system-ui, sans-serif;
  --font-serif: 'Newsreader', Georgia, serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  --max: 1200px;
  --gutter: 24px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-sans);
  background: var(--page);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
  font-size: 16px;
}
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; padding: 0; }
input, select, textarea { font-family: inherit; font-size: inherit; color: inherit; }
img { max-width: 100%; display: block; }
ul, ol { margin: 0; padding: 0; list-style: none; }

.v4-wrap { max-width: var(--max); margin: 0 auto; padding-inline: var(--gutter); }
.v4-serif { font-family: var(--font-serif); }

/* ===== Buttons ===== */
.v4-btn { display: inline-flex; align-items: center; gap: 8px; font-weight: 600; font-size: 14.5px; padding: 14px 22px; border-radius: 8px; border: 1px solid transparent; transition: background .15s, border-color .15s, color .15s; white-space: nowrap; }
.v4-btn:active { transform: translateY(1px); }
.v4-btn-lg { padding: 17px 26px; font-size: 15px; }
.v4-btn-teal { background: var(--teal); color: #fff; }
.v4-btn-teal:hover { background: var(--teal-2); }
.v4-btn-navy { background: var(--navy); color: #fff; }
.v4-btn-navy:hover { background: var(--navy-2); }
.v4-btn-outline { background: #fff; color: var(--teal); border-color: var(--hairline-2); }
.v4-btn-outline:hover { background: var(--teal-50); border-color: var(--teal-100); }

.v4-eyebrow { font-family: var(--font-display); font-size: 12px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--teal); margin-bottom: 20px; display: flex; align-self: flex-start; align-items: center; gap: 14px; }
.v4-eyebrow::before { content: ""; width: 34px; height: 3px; background: var(--teal); border-radius: 2px; flex-shrink: 0; }
.v4-eyebrow svg { width: 16px; height: 16px; }
.v4-eyebrow-center { justify-content: center; }
.v4-eyebrow-center::before { display: block; }
.v4-h2 { font-family: var(--font-display); font-size: clamp(28px, 3.4vw, 40px); line-height: 1.1; letter-spacing: -0.025em; font-weight: 700; color: var(--navy); margin: 0; text-wrap: balance; }

/* ===== Logo ===== */
.v4-logo img { height: 58px; display: block; transition: height .25s ease; }
body.is-scrolled .v4-logo img { height: 44px; }
.v4-footer .v4-logo img { height: 46px; background: #fff; padding: 9px 12px; border-radius: 12px; transition: none; }

/* Brand group: Knowledge-Center logo + Sciarc logo (links to sciarc.de) */
.v4-brand { display: flex; align-items: center; gap: 18px; min-width: 0; }
.v4-logo-sciarc { border-left: 1px solid var(--hairline); padding-left: 18px; }
.v4-logo-sciarc img { height: 32px; display: block; transition: height .25s ease, opacity .15s; }
.v4-logo-sciarc:hover img { opacity: .8; }
body.is-scrolled .v4-logo-sciarc img { height: 26px; }

/* ===== Lang ===== */
.v4-lang { display: inline-flex; align-items: center; gap: 6px; font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .05em; }
.v4-lang button { color: var(--muted); opacity: .6; padding: 2px; font-family: var(--font-mono); font-size: 11.5px; }
.v4-lang button:hover, .v4-lang button.on { opacity: 1; color: var(--teal); }
.v4-lang span { color: var(--muted-2); }

/* ===== Sticky notes (kept for the screenshot annotation only) ===== */
.v4-sticky { font-size: 13px; font-weight: 600; line-height: 1.3; padding: 12px 16px; border-radius: 4px; transform: rotate(var(--rot, -4deg)); box-shadow: 0 8px 20px -6px rgba(27,42,70,.35); max-width: 220px; }
.v4-sticky-teal { background: var(--navy); color: #fff; }
.v4-sticky-amber { background: var(--orange); color: #1a1305; }

/* ===== Nav (white, floating) ===== */
.v4-nav { position: sticky; top: 0; z-index: 40; background: rgba(255,255,255,.92); backdrop-filter: blur(16px); border-bottom: 1px solid var(--hairline); }
.v4-nav-in { display: flex; align-items: center; justify-content: space-between; gap: 28px; padding-block: 14px; transition: padding-block .25s ease; }
body.is-scrolled .v4-nav-in { padding-block: 10px; }
.v4-nav-links { display: flex; gap: 28px; }
.v4-nav-links a { font-size: 14.5px; color: var(--ink-2); font-weight: 500; }
.v4-nav-links a:hover { color: var(--teal); }
.v4-nav-right { display: flex; align-items: center; gap: 32px; }

.v4-topbar { background: transparent; color: var(--muted); font-size: 12.5px; text-align: center; }
.v4-topbar .v4-wrap { padding-block: 12px 2px; }

/* ===== Generic section: full-bleed, separated by background colour ===== */
.v4-panel, .v4-section {
  background: transparent;
  border: none;
  border-radius: 0;
  box-shadow: none;
  max-width: none;
  margin: 0;
  padding-block: 88px;
  padding-inline: 0;
}
.v4-section { background: transparent; }

/* per-section background colours (rhythm: white → teal → sand …, no two adjacent alike) */
#guidelines { background: var(--sec-teal); }
#tool       { background: var(--sec-sand); }
#how        { background: var(--sec-white); }
#faq        { background: var(--sec-teal); }
#experts    { background: var(--sec-sand); }
#contact    { background: var(--sec-white); }

/* ===== Hero (full-bleed, warm white) ===== */
.v4-hero { max-width: none; margin: 0; background: var(--sec-white); border: none; border-radius: 0; box-shadow: none; padding-block: 72px; padding-inline: 0; }
.v4-hero-grid { display: grid; grid-template-columns: 1fr 1.05fr; gap: 56px; align-items: center; }
.v4-card { background: var(--card); border: 1px solid var(--hairline); border-radius: var(--r-lg); box-shadow: var(--shadow-card); }
.v4-hero-left { display: flex; flex-direction: column; }
.v4-hero-h { font-family: var(--font-display); font-size: clamp(38px, 4.6vw, 54px); line-height: 1.04; letter-spacing: -0.03em; font-weight: 800; color: var(--navy); margin: 0 0 22px; text-wrap: balance; }
.v4-hero-body { color: var(--muted); font-size: 15.5px; line-height: 1.62; margin: 0 0 28px; max-width: 42ch; }
.v4-hero-cta { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 26px; }
.v4-hero-built { display: flex; gap: 14px; align-items: flex-start; font-size: 13.5px; color: var(--ink-2); line-height: 1.55; padding-top: 24px; margin-top: 8px; }
.v4-built-ic { width: 46px; height: 46px; border-radius: 12px; background: var(--teal-50); color: var(--teal); display: grid; place-items: center; flex-shrink: 0; }
.v4-built-ic svg { width: 22px; height: 22px; }
.v4-hero-features { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 44px; align-items: stretch; }
.v4-mini { display: flex; flex-direction: column; align-items: center; text-align: center; gap: 12px; line-height: 1.3; background: #fff; border: 1px solid var(--hairline); border-radius: 14px; padding: 26px 22px; box-shadow: var(--shadow-card); }
.v4-mini-l { font-size: 16px; color: var(--navy); font-weight: 700; letter-spacing: -0.01em; }
.v4-mini-d { font-size: 13px; color: var(--muted); font-weight: 400; line-height: 1.55; }
.v4-mini-ic { color: var(--teal); display: grid; place-items: center; }
.v4-mini-ic svg { width: 30px; height: 30px; }
.v4-hero-right-chat { display: flex; align-items: stretch; }
.v4-hero-right-chat .sc-chat { max-width: 100%; height: auto; min-height: 520px; box-shadow: var(--shadow-soft); border-radius: var(--r-lg); border: 1px solid var(--hairline); }
.v4-hero-demo { position: relative; display: block; width: 100%; padding: 0; border: 0; background: none; cursor: pointer; border-radius: var(--r-lg); }
.v4-hero-demo img { display: block; width: 100%; height: auto; border-radius: var(--r-lg); border: 1px solid var(--hairline); box-shadow: var(--shadow-soft); }
.v4-hero-demo-play { position: absolute; inset: 0; margin: auto; width: 64px; height: 64px; border-radius: 50%; display: grid; place-items: center; color: #fff; background: rgba(14, 124, 111, .92); box-shadow: 0 10px 30px -8px rgba(20, 35, 60, .5); opacity: 0; transform: scale(.9); transition: opacity .18s ease, transform .18s ease; pointer-events: none; }
.v4-hero-demo-play svg { width: 26px; height: 26px; }
.v4-hero-demo:hover .v4-hero-demo-play, .v4-hero-demo:focus-visible .v4-hero-demo-play { opacity: 1; transform: scale(1); }

/* ===== Included guidelines ===== */
.v4-hero-right { display: none; }
.v4-included-card { padding: 0; text-align: center; max-width: 1020px; margin: 0 auto; box-shadow: none; border: none; background: transparent; }
.v4-included-h { font-family: var(--font-display); font-size: clamp(24px, 2.8vw, 34px); line-height: 1.12; letter-spacing: -0.02em; font-weight: 700; color: var(--navy); margin: 0 auto 14px; max-width: 34ch; }
.v4-included-sub { color: var(--muted); font-size: 14.5px; line-height: 1.6; margin: 0 auto 32px; max-width: 62ch; }
.v4-included-foot { font-size: 12px; color: var(--muted-2); line-height: 1.55; margin: 0 auto 26px; max-width: 92ch; text-align: center; }
.v4-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 0 auto 28px; max-width: 560px; }
.v4-stat { background: #fff; border: 1px solid var(--hairline); border-radius: var(--r-md); padding: 22px 12px; box-shadow: var(--shadow-card); }
.v4-stat-ic { width: 42px; height: 42px; border-radius: 11px; background: var(--teal-50); color: var(--teal); display: inline-grid; place-items: center; margin-bottom: 14px; }
.v4-stat-n { font-family: var(--font-display); font-size: 28px; font-weight: 700; color: var(--navy); letter-spacing: -0.02em; line-height: 1; }
.v4-stat-l { font-size: 11.5px; color: var(--muted); margin-top: 6px; line-height: 1.3; }
/* therapeutic-area tiles (5 boxes, replaces the former chips + society bar) */
.v4-areas { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; margin-bottom: 26px; text-align: left; }
.v4-area { background: #fff; border: 1px solid var(--hairline); border-radius: var(--r-md); padding: 22px 18px; box-shadow: var(--shadow-card); display: flex; flex-direction: column; gap: 10px; transition: transform .2s, box-shadow .2s; }
.v4-area:hover { transform: translateY(-3px); box-shadow: var(--shadow-soft); }
.v4-area h3 { font-family: var(--font-display); font-size: 14.5px; font-weight: 700; color: var(--navy); line-height: 1.25; letter-spacing: -0.01em; margin: 0; padding-bottom: 10px; border-bottom: 2px solid var(--teal-100); }
.v4-area p { font-size: 12.5px; color: var(--muted); line-height: 1.55; margin: 0; }
.v4-area-label { font-family: var(--font-display); font-size: 11px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--teal); }
.v4-area-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.v4-area-list li { position: relative; padding-left: 14px; font-size: 12.5px; color: var(--muted); line-height: 1.45; }
.v4-area-list li::before { content: ""; position: absolute; left: 0; top: 7px; width: 5px; height: 5px; border-radius: 50%; background: var(--teal); }
.v4-included-note { display: inline-flex; align-items: flex-start; gap: 8px; justify-content: center; font-size: 12px; color: var(--muted-2); text-align: left; line-height: 1.4; margin: 0 auto; white-space: nowrap; }
.v4-included-note svg { color: var(--muted-2); flex-shrink: 0; margin-top: 1px; }
@media (max-width: 860px) { .v4-included-note { white-space: normal; max-width: 60ch; } }

/* ===== What the tool is ===== */
.v4-tool-top { display: grid; grid-template-columns: 1fr 1.25fr; gap: 56px; align-items: center; margin-bottom: 16px; }
.v4-tool-p { color: var(--muted); font-size: 14.5px; line-height: 1.62; margin: 16px 0 0; max-width: 46ch; }
.v4-tool-l .v4-h2 { margin-top: 4px; }
.v4-tool-steps { display: flex; align-items: stretch; gap: 10px; }
.v4-step { flex: 1; padding: 26px 18px; text-align: center; display: flex; flex-direction: column; align-items: center; border-radius: var(--r-md); border: 1px solid var(--hairline); background: #fff; box-shadow: var(--shadow-card); transition: transform .2s, box-shadow .2s; }
.v4-step:hover { transform: translateY(-4px); box-shadow: var(--shadow-soft); }
.v4-step-ic { width: 50px; height: 50px; border-radius: 14px; background: var(--teal-50); color: var(--teal); display: grid; place-items: center; margin-bottom: 18px; }
.v4-step-n { font-family: var(--font-mono); font-size: 12px; color: var(--teal); margin-bottom: 6px; }
.v4-step-t { font-size: 14.5px; font-weight: 600; color: var(--navy); line-height: 1.25; margin-bottom: 6px; }
.v4-step-s { font-size: 12px; color: var(--muted); }
.v4-step-arrow { display: flex; align-items: center; color: var(--teal); opacity: .5; flex-shrink: 0; }
.v4-tool-feats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 40px; }
.v4-feat { padding: 30px; border-radius: var(--r-md); border: 1px solid var(--hairline); background: #fff; box-shadow: var(--shadow-card); transition: transform .2s, box-shadow .2s; }
.v4-feat:hover { transform: translateY(-4px); box-shadow: var(--shadow-soft); }
.v4-feat-ic { width: 50px; height: 50px; border-radius: 14px; background: var(--teal-50); color: var(--teal); display: grid; place-items: center; margin-bottom: 18px; }
.v4-feat h3 { font-size: 17px; font-weight: 600; color: var(--navy); margin: 0 0 8px; letter-spacing: -0.01em; }
.v4-feat p { font-size: 13.5px; color: var(--muted); line-height: 1.58; margin: 0; }
.v4-tool-disc { display: flex; align-items: center; justify-content: center; gap: 10px; margin-top: 32px; padding: 18px; background: var(--teal-50); border: 1px solid var(--teal-100); border-radius: var(--r-md); font-size: 13.5px; color: var(--ink-2); font-weight: 500; }
.v4-tool-disc svg { color: var(--teal); flex-shrink: 0; }

/* ===== How it works ===== */
.v4-how-grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: 56px; align-items: start; }
.v4-how-h { font-family: var(--font-display); font-size: clamp(26px, 3vw, 34px); line-height: 1.12; letter-spacing: -0.02em; font-weight: 700; color: var(--navy); margin: 0 0 14px; }
.v4-how-sub { color: var(--muted); font-size: 14.5px; line-height: 1.62; margin: 0 0 32px; max-width: 46ch; }
.v4-how-steps { display: flex; flex-direction: column; gap: 10px; }
.v4-how-step { display: grid; grid-template-columns: 48px 1fr; gap: 16px; align-items: start; padding: 16px; border-radius: var(--r-md); border: 1px solid transparent; background: transparent; text-align: left; width: 100%; position: relative; cursor: pointer; transition: background .2s, border-color .2s, box-shadow .2s; }
.v4-how-step:hover { background: var(--soft); }
.v4-how-step.on { background: var(--teal-50); border-color: var(--teal-100); box-shadow: var(--shadow-card); }
.v4-how-ic { width: 44px; height: 44px; border-radius: 12px; background: var(--teal-50); border: 1px solid var(--teal-100); color: var(--teal); display: grid; place-items: center; transition: background .2s, color .2s, border-color .2s; }
.v4-how-step.on .v4-how-ic { background: var(--teal); color: #fff; border-color: var(--teal); }
.v4-how-step-body { min-width: 0; }
.v4-how-step h4 { font-size: 15px; font-weight: 600; color: var(--muted); margin: 4px 0 4px; transition: color .2s; }
.v4-how-step.on h4 { color: var(--navy); }
.v4-how-step p { font-size: 13.5px; color: var(--muted-2); line-height: 1.5; margin: 0; max-width: 44ch; }
.v4-how-step.on p { color: var(--muted); }
.v4-how-prog { position: absolute; left: 16px; right: 16px; bottom: 8px; height: 2px; border-radius: 2px; background: var(--hairline); overflow: hidden; opacity: 0; transition: opacity .2s; }
.v4-how-step.on .v4-how-prog { opacity: 1; }
.v4-how-prog i { display: block; height: 100%; width: 0; background: var(--teal); border-radius: 2px; }
.v4-how-step.on .v4-how-prog i { animation-name: howProg; animation-timing-function: linear; animation-fill-mode: forwards; }
@keyframes howProg { from { width: 0; } to { width: 100%; } }
@media (prefers-reduced-motion: reduce) { .v4-how-step.on .v4-how-prog i { animation: none; width: 100%; } }

.v4-how-r { position: sticky; top: 90px; }
.v4-shot { background: var(--card); border: 1px solid var(--hairline); border-radius: var(--r-lg); overflow: hidden; box-shadow: var(--shadow-soft); }
.v4-shot-bar { display: flex; align-items: center; gap: 8px; padding: 13px 16px; border-bottom: 1px solid var(--hairline); background: var(--soft); }
.v4-shot-bar > span { width: 11px; height: 11px; border-radius: 50%; background: var(--hairline-2); }
.v4-shot-bar > span:first-child { background: #E8856B; }
.v4-shot-bar > span:nth-child(2) { background: #E8C36B; }
.v4-shot-bar > span:nth-child(3) { background: #84C08A; }
.v4-shot-url { margin-left: 12px; font-family: var(--font-mono); font-size: 11.5px; color: var(--muted); background: var(--card); border: 1px solid var(--hairline); border-radius: 6px; padding: 5px 12px; flex: 1; transition: none; }
.v4-shot-stack { position: relative; height: 440px; }
.v4-shot-slide { position: absolute; inset: 0; opacity: 0; transform: scale(1.01); transition: opacity .5s ease, transform .5s ease; pointer-events: none; }
.v4-shot-slide.on { opacity: 1; transform: scale(1); pointer-events: auto; }
.v4-shot-slide img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: top; display: none; }
.v4-shot-slide img.loaded { display: block; }
.v4-shot-ph { height: 100%; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px; text-align: center; padding: 32px; background: repeating-linear-gradient(45deg, #fff 0, #fff 14px, #FAFAFC 14px, #FAFAFC 28px); }
.v4-shot-ph-n { width: 44px; height: 44px; border-radius: 50%; background: var(--teal-50); color: var(--teal); display: grid; place-items: center; font-family: var(--font-display); font-weight: 700; font-size: 18px; }
.v4-shot-ph-t { font-family: var(--font-display); font-size: 18px; font-weight: 600; color: var(--navy); letter-spacing: -0.01em; max-width: 24ch; }
.v4-shot-ph-h { font-family: var(--font-mono); font-size: 11px; letter-spacing: .06em; text-transform: uppercase; color: var(--muted-2); }
.v4-shot-dots { display: flex; gap: 8px; justify-content: center; margin-top: 16px; }
.v4-shot-dots button { width: 8px; height: 8px; border-radius: 999px; background: var(--hairline-2); padding: 0; transition: background .2s, width .2s; }
.v4-shot-dots button.on { background: var(--teal); width: 26px; }

/* ===== FAQ ===== */
.v4-faq-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; align-items: start; }
.v4-faq-h { font-family: var(--font-display); font-size: clamp(28px, 3.4vw, 40px); line-height: 1.08; letter-spacing: -0.02em; font-weight: 700; color: var(--navy); margin: 0 0 16px; }
.v4-faq-intro { color: var(--muted); font-size: 14.5px; line-height: 1.62; margin: 0 0 28px; max-width: 42ch; }
.v4-faq-still { padding: 30px; background: #fff; border: 1px solid var(--hairline); border-radius: var(--r-md); box-shadow: var(--shadow-card); }
.v4-still-ic { width: 46px; height: 46px; border-radius: 12px; background: var(--teal-50); color: var(--teal); display: inline-grid; place-items: center; margin-bottom: 16px; }
.v4-faq-still h4 { font-size: 16px; font-weight: 600; color: var(--navy); margin: 0 0 8px; }
.v4-faq-still p { font-size: 13.5px; color: var(--ink-2); line-height: 1.55; margin: 0 0 18px; }
.v4-faq-secure { display: flex; align-items: center; gap: 8px; margin-top: 18px; font-size: 12px; color: var(--muted-2); }
.v4-faq-secure svg { color: var(--muted-2); }
.v4-faq-r { display: flex; flex-direction: column; gap: 10px; }
.v4-faq-item { padding: 0; overflow: hidden; border-radius: var(--r-md); border: 1px solid var(--hairline); box-shadow: var(--shadow-card); transition: box-shadow .2s, transform .2s; }
.v4-faq-item.on { box-shadow: var(--shadow-soft); transform: translateY(-2px); }
.v4-faq-q { display: flex; align-items: center; gap: 14px; width: 100%; padding: 19px 22px; text-align: left; }
.v4-faq-qic { width: 36px; height: 36px; border-radius: 10px; background: var(--teal-50); color: var(--teal); display: grid; place-items: center; flex-shrink: 0; }
.v4-faq-qic svg { width: 17px; height: 17px; }
.v4-faq-qt { flex: 1; font-size: 14.5px; font-weight: 600; color: var(--navy); line-height: 1.35; }
.v4-faq-pm { font-size: 20px; color: var(--teal); font-weight: 400; width: 18px; text-align: center; }
.v4-faq-a { padding: 0 22px 20px 72px; font-size: 13.5px; color: var(--muted); line-height: 1.62; }

/* ===== Experts ===== */
.v4-exp-head { text-align: center; max-width: 640px; margin: 0 auto 48px; }
.v4-exp-h { font-family: var(--font-display); font-size: clamp(28px, 3.4vw, 40px); line-height: 1.08; letter-spacing: -0.02em; font-weight: 700; color: var(--navy); margin: 0 0 16px; }
.v4-exp-h::after { content: ""; display: block; width: 48px; height: 2px; background: var(--teal); margin: 18px auto 0; border-radius: 2px; }
.v4-exp-sub { color: var(--muted); font-size: 15px; line-height: 1.6; margin: 0; }
.v4-exp-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.v4-exp-card { padding: 38px; border-radius: var(--r-lg); border: 1px solid var(--hairline); box-shadow: var(--shadow-card); }
.v4-exp-quote { color: var(--teal-100); display: inline-flex; margin-bottom: 12px; }
.v4-exp-text { font-family: var(--font-serif); font-style: italic; font-size: 18px; line-height: 1.5; color: var(--ink); margin: 0 0 24px; }
.v4-exp-who { display: flex; align-items: center; gap: 14px; padding-top: 20px; border-top: 1px solid var(--line-soft); }
.v4-exp-avatar { width: 48px; height: 48px; border-radius: 50%; background: var(--teal-50); color: var(--teal); display: grid; place-items: center; flex-shrink: 0; }
.v4-exp-name { font-size: 14.5px; font-weight: 600; color: var(--navy); }
.v4-exp-role { font-size: 12px; color: var(--muted); line-height: 1.4; margin-top: 3px; }
.v4-exp-tags { display: flex; align-items: center; justify-content: center; gap: 12px; margin-top: 40px; font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.v4-exp-dot { color: var(--teal); }

/* Task-Force acknowledgement + publications */
.v4-ack { margin-top: 20px; padding: 36px 38px; border-radius: var(--r-lg); }
.v4-ack-t { font-family: var(--font-display); font-size: 19px; font-weight: 700; color: var(--navy); letter-spacing: -0.01em; margin: 0 0 4px; }
.v4-ack-sub { font-family: var(--font-mono); font-size: 11px; letter-spacing: .06em; text-transform: uppercase; color: var(--teal); margin-bottom: 16px; }
.v4-ack-intro { font-size: 13.5px; color: var(--muted); line-height: 1.62; margin: 0 0 26px; max-width: 92ch; }
.v4-pubs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.v4-pub { display: flex; flex-direction: column; justify-content: space-between; gap: 16px; background: var(--soft); border: 1px solid var(--hairline); border-radius: var(--r-md); padding: 22px; transition: border-color .15s, transform .2s, box-shadow .2s; }
.v4-pub:hover { border-color: var(--teal-100); transform: translateY(-3px); box-shadow: var(--shadow-card); }
.v4-pub-t { font-size: 13px; font-weight: 600; color: var(--navy); line-height: 1.45; margin: 0; }
.v4-pub-j { display: block; font-family: var(--font-serif); font-style: italic; font-size: 12.5px; color: var(--muted); margin-bottom: 10px; }
.v4-pub-link { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; font-weight: 700; color: var(--teal); }

/* ===== Contact section (landing) ===== */
.v4-contact-head { text-align: center; max-width: 640px; margin: 0 auto 44px; }
.v4-contact-h { font-family: var(--font-display); font-size: clamp(28px, 3.4vw, 40px); line-height: 1.08; letter-spacing: -0.02em; font-weight: 700; color: var(--navy); margin: 0 0 16px; }
.v4-contact-sub { color: var(--muted); font-size: 15px; line-height: 1.6; margin: 0; }
.v4-contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; align-items: stretch; }
.v4-contact-tile { padding: 30px; border-radius: var(--r-md); display: flex; flex-direction: column; align-items: flex-start; }
.v4-contact-ic { width: 46px; height: 46px; border-radius: 12px; background: var(--teal-50); color: var(--teal); display: grid; place-items: center; margin-bottom: 16px; }
.v4-contact-tile h3 { font-size: 17px; font-weight: 600; color: var(--navy); margin: 0 0 8px; letter-spacing: -0.01em; }
.v4-contact-tile p { font-size: 13.5px; color: var(--muted); line-height: 1.6; margin: 0 0 12px; }
.v4-contact-mail { color: var(--teal); font-weight: 600; }
.v4-contact-tile .v4-btn { margin-top: auto; }

/* ===== CTA band (full-bleed navy) ===== */
.v4-cta-band { background: var(--navy); border: none; border-radius: 0; max-width: none; margin: 0; box-shadow: none; position: relative; overflow: hidden; }
.v4-cta-band::after { content: ""; position: absolute; right: -80px; top: -80px; width: 320px; height: 320px; border-radius: 50%; background: radial-gradient(circle, rgba(240,133,31,.28), transparent 70%); pointer-events: none; }
.v4-cta-in { display: flex; align-items: center; justify-content: space-between; gap: 32px; padding: 56px 0; position: relative; z-index: 1; }
.v4-cta-h { font-family: var(--font-display); font-size: clamp(26px, 3vw, 36px); line-height: 1.08; font-weight: 700; color: #fff; margin: 0 0 10px; letter-spacing: -0.02em; }
.v4-cta-sub { color: rgba(255,255,255,.72); font-size: 15px; margin: 0; max-width: 52ch; line-height: 1.55; }

/* ===== Footer (full-bleed deep navy) ===== */
.v4-footer { background: #101B2E; color: #E7EAF0; border: none; border-radius: 0; box-shadow: none; max-width: none; margin: 0; padding: 64px 0 36px; }
.v4-footer-in { display: grid; grid-template-columns: 1.8fr repeat(3, 1fr); gap: 40px; }
.v4-footer-brand p { font-size: 13.5px; color: rgba(231,234,240,.6); margin: 14px 0 0; max-width: 30ch; }
.v4-footer-col h5 { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .08em; text-transform: uppercase; color: rgba(231,234,240,.45); margin: 0 0 14px; font-weight: 500; }
.v4-footer-col li { margin-bottom: 9px; }
.v4-footer-col a { font-size: 14px; color: rgba(231,234,240,.82); }
.v4-footer-col a:hover { color: #fff; }
.v4-footer-bottom { display: flex; justify-content: space-between; padding-top: 24px; margin-top: 40px; border-top: 1px solid rgba(231,234,240,.14); font-size: 12px; color: rgba(231,234,240,.4); font-family: var(--font-mono); }

/* ===== Reused chat preview + modal ===== */
.sc-chat { display: grid; grid-template-columns: 180px 1fr; width: 100%; max-width: 640px; height: 540px; background: #fff; border: 1px solid var(--hairline); border-radius: 20px; overflow: hidden; }
.sc-chat-side { background: var(--soft); border-right: 1px solid var(--hairline); display: flex; flex-direction: column; }
.sc-chat-side-head { padding: 14px 12px; }
.sc-chat-new { display: flex; align-items: center; gap: 8px; width: 100%; padding: 8px 10px; border: 1px solid var(--hairline); border-radius: 8px; background: #fff; font-size: 12.5px; color: var(--ink-2); }
.sc-chat-new svg { width: 14px; height: 14px; }
.sc-chat-side-section { padding: 0 8px 8px; flex: 1; overflow: hidden; }
.sc-chat-side-label { display: inline-flex; align-items: center; gap: 6px; font-family: var(--font-mono); font-size: 10px; letter-spacing: .06em; text-transform: uppercase; color: var(--muted-2); padding: 12px 6px 6px; }
.sc-chat-side-list { font-size: 12.5px; }
.sc-chat-side-list li { padding: 7px 8px; border-radius: 6px; color: var(--ink-2); cursor: pointer; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sc-chat-side-list li:hover { background: var(--teal-50); }
.sc-chat-side-list li.on { background: var(--teal-50); color: var(--navy); font-weight: 500; }
.sc-chat-side-foot { padding: 10px; border-top: 1px solid var(--hairline); }
.sc-chat-side-user { display: flex; align-items: center; gap: 8px; padding: 6px; }
.sc-chat-side-avatar { width: 28px; height: 28px; border-radius: 50%; background: var(--teal); color: #fff; display: grid; place-items: center; font-size: 11px; font-weight: 600; }
.sc-chat-side-name { font-size: 12px; font-weight: 500; }
.sc-chat-side-mail { font-size: 10.5px; color: var(--muted); }
.sc-chat-main { display: flex; flex-direction: column; min-width: 0; }
.sc-chat-top { display: flex; align-items: center; justify-content: space-between; padding: 14px 18px; border-bottom: 1px solid var(--hairline); }
.sc-chat-top-title { display: flex; align-items: center; gap: 10px; font-weight: 500; font-size: 13px; color: var(--navy); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sc-chat-mark { height: 20px; flex-shrink: 0; }
.sc-chat-top-meta { font-family: var(--font-mono); font-size: 11px; color: var(--muted-2); }
.sc-chat-scroll { flex: 1; overflow: hidden; padding: 18px; display: flex; flex-direction: column; gap: 14px; }
.sc-chat-row-user { display: flex; justify-content: flex-end; animation: scIn .35s ease both; }
.sc-chat-row-user .sc-chat-bubble { background: var(--teal-50); border-radius: 14px; padding: 10px 14px; max-width: 85%; font-size: 13.5px; line-height: 1.45; color: var(--ink); }
.sc-chat-thinking { display: inline-flex; gap: 4px; padding: 6px 0; }
.sc-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--muted-2); animation: scBlink 1.1s infinite ease-in-out; }
.sc-dot:nth-child(2) { animation-delay: .15s; }
.sc-dot:nth-child(3) { animation-delay: .3s; }
@keyframes scBlink { 0%, 80%, 100% { opacity: .25; transform: translateY(0); } 40% { opacity: 1; transform: translateY(-2px); } }
.sc-chat-answer { animation: scIn .4s ease both; }
.sc-chat-answer-h { font-size: 14px; font-weight: 600; color: var(--navy); margin: 0 0 10px; line-height: 1.35; }
.sc-chat-steps { display: flex; flex-direction: column; gap: 8px; font-size: 12.5px; line-height: 1.5; }
.sc-chat-steps li { display: grid; grid-template-columns: 22px 1fr; gap: 6px; align-items: start; }
.sc-step-num { width: 20px; height: 20px; border-radius: 50%; background: var(--teal-50); color: var(--teal); font-weight: 600; font-size: 11px; display: grid; place-items: center; }
.sc-cite { color: var(--teal); font-weight: 500; font-size: 11.5px; padding-left: 2px; cursor: pointer; }
.sc-chat-sources { display: flex; gap: 8px; margin-top: 12px; flex-wrap: wrap; }
.sc-source-chip { display: inline-flex; align-items: center; gap: 8px; padding: 8px 10px; background: var(--soft); border: 1px solid var(--hairline); border-radius: 8px; cursor: pointer; transition: border-color .15s; }
.sc-source-chip:hover { border-color: var(--teal); }
.sc-source-chip > svg:first-child { color: var(--teal); flex-shrink: 0; }
.sc-source-doc { font-size: 11.5px; font-weight: 500; color: var(--navy); }
.sc-source-page { font-family: var(--font-mono); font-size: 10px; color: var(--muted); }
.sc-source-chip > svg:last-child { color: var(--muted-2); }
.sc-chat-follow { animation: scIn .35s ease both; }
.sc-chat-follow-label { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .06em; text-transform: uppercase; color: var(--teal); display: inline-flex; align-items: center; gap: 6px; margin-bottom: 8px; }
.sc-chat-follow-list { display: flex; flex-direction: column; gap: 6px; }
.sc-chat-follow-list button { display: flex; justify-content: space-between; align-items: center; gap: 12px; text-align: left; padding: 10px 12px; background: transparent; border: 1px solid var(--hairline); border-radius: 10px; font-size: 12.5px; color: var(--ink-2); transition: border-color .15s, background .15s; }
.sc-chat-follow-list button:hover { border-color: var(--teal); background: var(--teal-50); }
.sc-chat-follow-list svg { color: var(--muted-2); flex-shrink: 0; }
.sc-chat-input-wrap { padding: 12px 14px 14px; border-top: 1px solid var(--hairline); }
.sc-chat-input { display: flex; align-items: center; gap: 8px; padding: 6px 6px 6px 12px; border: 1px solid var(--hairline); border-radius: 999px; background: var(--soft); }
.sc-chat-attach { width: 28px; height: 28px; display: grid; place-items: center; color: var(--muted); border-radius: 50%; }
.sc-chat-attach:hover { background: var(--teal-50); }
.sc-chat-input-text { flex: 1; font-size: 13px; color: var(--ink); min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sc-chat-input-text .sc-placeholder { color: var(--muted-2); }
.sc-caret { color: var(--teal); animation: scCaret 1s steps(2) infinite; margin-left: 1px; }
@keyframes scCaret { 50% { opacity: 0; } }
.sc-chat-send { width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; background: var(--teal-50); color: var(--muted-2); transition: background .15s, color .15s; }
.sc-chat-send.on { background: var(--teal); color: #fff; }
@keyframes scIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }

.sc-modal-back { position: fixed; inset: 0; z-index: 100; background: rgba(27,42,70,.5); backdrop-filter: blur(4px); display: grid; place-items: center; padding: 24px; animation: scIn .2s ease both; }
.sc-modal { background: #fff; border: 1px solid var(--hairline); border-radius: 22px; width: 100%; max-width: 440px; max-height: 92vh; overflow: auto; padding: 32px; position: relative; box-shadow: var(--shadow-soft); animation: scModalIn .25s cubic-bezier(.2,.8,.2,1) both; }
.sc-modal-wide { max-width: 560px; }
@keyframes scModalIn { from { opacity: 0; transform: translateY(8px) scale(.98); } to { opacity: 1; transform: translateY(0) scale(1); } }
.sc-modal-close { position: absolute; top: 16px; right: 16px; width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center; color: var(--muted); }
.sc-modal-close:hover { background: var(--teal-50); color: var(--navy); }
.sc-modal-h { font-family: var(--font-display); font-size: 26px; font-weight: 700; letter-spacing: -0.02em; margin: 0 0 6px; color: var(--navy); }
.sc-modal-sub { color: var(--muted); margin: 0 0 24px; font-size: 14.5px; line-height: 1.5; }
.sc-form { display: flex; flex-direction: column; gap: 16px; }
.sc-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.sc-field { display: flex; flex-direction: column; gap: 6px; }
.sc-field span { font-size: 12.5px; color: var(--ink-2); font-weight: 500; }
.sc-field input, .sc-field select { padding: 11px 13px; border: 1px solid var(--hairline-2); border-radius: 10px; background: #fff; font-size: 14px; outline: none; transition: border-color .15s, box-shadow .15s; }
.sc-field input:focus, .sc-field select:focus { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(28,129,117,.15); }
.sc-select-wrap { position: relative; }
.sc-select-wrap select { appearance: none; width: 100%; padding-right: 32px; }
.sc-select-caret { position: absolute; right: 12px; top: 50%; transform: translateY(-50%); color: var(--muted-2); pointer-events: none; }
.sc-form-row-between { display: flex; justify-content: space-between; align-items: center; font-size: 13px; }
.sc-check { display: inline-flex; gap: 8px; align-items: center; font-size: 13px; color: var(--ink-2); cursor: pointer; }
.sc-check input { width: 16px; height: 16px; accent-color: var(--teal); }
.sc-check-block { align-items: flex-start; line-height: 1.45; padding: 4px 0; }
.sc-check-block input { margin-top: 1px; flex-shrink: 0; }
.sc-form-foot { text-align: center; font-size: 13.5px; color: var(--muted); margin: 8px 0 0; }
.sc-link { color: var(--navy); border-bottom: 1px solid var(--hairline-2); padding-bottom: 1px; background: none; }
.sc-link:hover { color: var(--teal); border-color: var(--teal); }
.sc-btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font-weight: 600; font-size: 14.5px; padding: 12px 18px; border-radius: 11px; border: 1px solid transparent; transition: background .15s; }
.sc-btn-primary { background: var(--teal); color: #fff; }
.sc-btn-primary:hover { background: var(--teal-2); }
.sc-btn-primary:disabled { background: #C8D4D2; color: #fff; cursor: not-allowed; }
.sc-btn-block { width: 100%; }
.sc-success { text-align: center; padding: 8px 4px 0; }
.sc-success-mark { width: 56px; height: 56px; border-radius: 50%; background: var(--teal-50); color: var(--teal); display: grid; place-items: center; margin: 0 auto 18px; }
.sc-success-mark svg { width: 28px; height: 28px; }

/* ===== GEO check ===== */
/* visitor from a non-enabled country: access buttons look disabled but still
   trigger the explainer popup on click (so pointer-events stay on) */
.geo-blocked .v4-btn-teal,
.geo-blocked .v4-btn-navy {
  background: #B9C0CB !important;
  color: #fff !important;
  box-shadow: none !important;
  cursor: not-allowed;
  filter: none;
}
.geo-blocked .v4-btn-teal:hover,
.geo-blocked .v4-btn-navy:hover { background: #B9C0CB !important; transform: none; }
.geo-blocked .v4-btn-navy { position: relative; }

.geo-pop-back {
  position: fixed; inset: 0; z-index: 120;
  background: rgba(20,35,60,.55); backdrop-filter: blur(4px);
  display: grid; place-items: center; padding: 24px;
  animation: scIn .2s ease both;
}
.geo-pop {
  background: #fff; border-radius: 20px; width: 100%; max-width: 400px;
  padding: 36px 32px 28px; text-align: center;
  box-shadow: var(--shadow-soft);
  animation: scModalIn .25s cubic-bezier(.2,.8,.2,1) both;
}
.geo-pop-ic {
  width: 60px; height: 60px; border-radius: 50%;
  background: var(--teal-50); color: var(--teal);
  display: grid; place-items: center; margin: 0 auto 20px;
}
.geo-pop-h { font-family: var(--font-display); font-size: 21px; font-weight: 700; letter-spacing: -0.015em; color: var(--navy); margin: 0 0 10px; }
.geo-pop-b { font-size: 14px; line-height: 1.6; color: var(--muted); margin: 0 0 24px; }
.geo-pop-btn { width: 100%; justify-content: center; }

/* ===== Responsive ===== */
@media (max-width: 980px) {
  .v4-hero, .v4-panel, .v4-section { padding-block: 56px; }
  .v4-cta-in { padding: 40px 0; }
  .v4-hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .v4-tool-top { grid-template-columns: 1fr; gap: 32px; }
  .v4-tool-feats { grid-template-columns: 1fr; }
  .v4-how-grid { grid-template-columns: 1fr; gap: 40px; }
  .v4-how-r { position: static; }
  .v4-faq-grid { grid-template-columns: 1fr; gap: 32px; }
  .v4-exp-grid { grid-template-columns: 1fr; }
  .v4-areas { grid-template-columns: repeat(2, 1fr); }
  .v4-pubs { grid-template-columns: 1fr; }
  .v4-contact-grid { grid-template-columns: 1fr; }
  .v4-cta-in { flex-direction: column; align-items: flex-start; padding: 36px; }
  .v4-footer-in { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .v4-nav-links { display: none; }
  .v4-hero, .v4-panel, .v4-section, .v4-footer { padding: 24px; }
  .v4-stats { grid-template-columns: 1fr; }
  .v4-tool-steps { flex-direction: column; }
  .v4-step-arrow { transform: rotate(90deg); align-self: center; }
  .v4-hero-features { grid-template-columns: 1fr 1fr; }
  .v4-areas { grid-template-columns: 1fr; }
  .v4-footer-in { grid-template-columns: 1fr; }
  .sc-chat { grid-template-columns: 1fr; height: auto; }
  .sc-chat-side { display: none; }
  .sc-grid-2 { grid-template-columns: 1fr; }
}

/* DE/EN language links (server-rendered toggle) */
.v4-lang-link { color: var(--muted); opacity: .6; padding: 2px; }
.v4-lang-link:hover, .v4-lang-link.on { opacity: 1; color: var(--teal); }

/* Hidden modals must stay hidden (CSS display:grid otherwise overrides [hidden]) */
.sc-modal-back[hidden] { display: none !important; }

/* ===== Mobile burger menu + logo fix (landing nav) ===== */
.v4-logo, .v4-logo img { flex-shrink: 0; }
.nav-burger { display: none; width: 42px; height: 42px; border-radius: 10px; border: 1px solid var(--hairline); background: #fff; color: var(--navy); align-items: center; justify-content: center; flex-shrink: 0; cursor: pointer; }
.nav-burger svg { width: 22px; height: 22px; }
.nav-burger .x { display: none; }
.v4-nav.open .nav-burger .x { display: block; }
.v4-nav.open .nav-burger .m { display: none; }

@media (max-width: 860px) {
  .nav-burger { display: inline-flex; }
  .v4-nav-right { gap: 12px; }
  .v4-nav-links {
    position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; gap: 0;
    background: rgba(255,255,255,.98); backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--hairline); box-shadow: var(--shadow-soft);
    padding: 8px 0; display: none;
  }
  .v4-nav.open .v4-nav-links { display: flex; }
  .v4-nav-links a { padding: 13px 24px; font-size: 15px; }
}
@media (max-width: 640px) {
  .v4-logo img, body.is-scrolled .v4-logo img { height: 38px; }
  .v4-brand { gap: 10px; }
  .v4-logo-sciarc { padding-left: 10px; }
  .v4-logo-sciarc img, body.is-scrolled .v4-logo-sciarc img { height: 20px; }
  .v4-nav .v4-btn-navy { padding: 10px 14px; font-size: 13.5px; }
}

/* Sign-in: standalone button on desktop, inside burger dropdown on mobile */
.nav-signin-only { display: none; }
@media (max-width: 860px) {
  .v4-nav .nav-cta { display: none; }
  .v4-nav-links a.nav-signin-only { display: block; color: var(--teal); font-weight: 600; }
}