/* ============================================================
   Verstopfungsstudie ATS_9711 – Landingpage
   Klinisch, vertrauensvoll, conversion-optimiert
   ============================================================ */

:root, [data-theme="light"] {
  /* Surfaces – kühl-klinisches Weiß mit warmem Unterton */
  --color-bg: #f6f8f8;
  --color-surface: #ffffff;
  --color-surface-2: #fbfdfd;
  --color-surface-offset: #eef3f3;
  --color-surface-offset-2: #e4ecec;
  --color-divider: #dde6e6;
  --color-border: #d2dddd;

  /* Text */
  --color-text: #15302f;
  --color-text-muted: #5a6e6d;
  --color-text-faint: #9fb0af;
  --color-text-inverse: #f4fafa;

  /* Primary – ruhiges medizinisches Teal */
  --color-primary: #0b7c83;
  --color-primary-hover: #096067;
  --color-primary-active: #07474c;
  --color-primary-highlight: #d3e8e8;

  /* Accent – warmes Sand für Vertrauen/Wärme */
  --color-accent: #c98a3f;
  --color-accent-hover: #b3742c;
  --color-accent-highlight: #f1e3d0;

  /* Success */
  --color-success: #2f7d4f;
  --color-success-highlight: #d6ebdf;
  /* Error / Hinweis */
  --color-error: #b1473a;
  --color-error-highlight: #f1d9d5;

  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  --transition-interactive: 200ms cubic-bezier(0.16, 1, 0.3, 1);

  --shadow-sm: 0 1px 2px rgba(20,48,47,0.06);
  --shadow-md: 0 6px 20px rgba(20,48,47,0.08);
  --shadow-lg: 0 18px 48px rgba(20,48,47,0.14);

  --content-narrow: 680px;
  --content-default: 1000px;
  --content-wide: 1200px;

  --font-display: 'Clash Display', 'Satoshi', 'Helvetica Neue', sans-serif;
  --font-body: 'Satoshi', 'Inter', 'Helvetica Neue', sans-serif;

  /* Type scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.82rem + 0.3vw, 1rem);
  --text-base: clamp(1rem, 0.96rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.15rem, 1rem + 0.7vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.3vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.4rem + 2.6vw, 3.4rem);

  /* Spacing */
  --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem;
  --space-4: 1rem; --space-5: 1.25rem; --space-6: 1.5rem;
  --space-8: 2rem; --space-10: 2.5rem; --space-12: 3rem;
  --space-16: 4rem; --space-20: 5rem; --space-24: 6rem;
}

[data-theme="dark"] {
  --color-bg: #0e1817;
  --color-surface: #14201f;
  --color-surface-2: #182624;
  --color-surface-offset: #16211f;
  --color-surface-offset-2: #1c2b29;
  --color-divider: #223230;
  --color-border: #2c3e3c;
  --color-text: #dde9e8;
  --color-text-muted: #8ba09e;
  --color-text-faint: #5d716f;
  --color-text-inverse: #0e1817;
  --color-primary: #3fb0b7;
  --color-primary-hover: #57c2c8;
  --color-primary-active: #6fd0d5;
  --color-primary-highlight: #1d3634;
  --color-accent: #e0a45c;
  --color-accent-hover: #ecb877;
  --color-accent-highlight: #3a2e1d;
  --color-success: #5cae7c;
  --color-success-highlight: #1f3a2b;
  --color-error: #d97a6c;
  --color-error-highlight: #3a221e;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 6px 20px rgba(0,0,0,0.4);
  --shadow-lg: 0 18px 48px rgba(0,0,0,0.5);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #0e1817; --color-surface: #14201f; --color-surface-2: #182624;
    --color-surface-offset: #16211f; --color-surface-offset-2: #1c2b29;
    --color-divider: #223230; --color-border: #2c3e3c;
    --color-text: #dde9e8; --color-text-muted: #8ba09e; --color-text-faint: #5d716f;
    --color-primary: #3fb0b7; --color-primary-hover: #57c2c8; --color-primary-highlight: #1d3634;
    --color-accent: #e0a45c;
  }
}

/* ---------- Base ---------- */
*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility; scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}
body {
  min-height: 100dvh; line-height: 1.6;
  font-family: var(--font-body); font-size: var(--text-base);
  color: var(--color-text); background-color: var(--color-bg);
}
img,svg { display: block; max-width: 100%; height: auto; }
ul[role="list"] { list-style: none; }
input,button,textarea,select { font: inherit; color: inherit; }
h1,h2,h3,h4 { text-wrap: balance; line-height: 1.12; font-family: var(--font-display); font-weight: 600; }
p,li { text-wrap: pretty; }
button { cursor: pointer; background: none; border: none; }
a { color: inherit; }
::selection { background: var(--color-primary-highlight); color: var(--color-text); }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: var(--radius-sm); }
@media (prefers-reduced-motion: reduce) {
  *,*::before,*::after { animation-duration: .01ms !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}
a,button,input,select,textarea {
  transition: color var(--transition-interactive), background var(--transition-interactive),
              border-color var(--transition-interactive), box-shadow var(--transition-interactive),
              transform var(--transition-interactive);
}
.sr-only { position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border-width:0; }

/* ---------- Layout ---------- */
.wrap { width: min(100% - 2.5rem, var(--content-wide)); margin-inline: auto; }
.wrap-default { width: min(100% - 2.5rem, var(--content-default)); margin-inline: auto; }
.wrap-narrow { width: min(100% - 2.5rem, var(--content-narrow)); margin-inline: auto; }
section { padding-block: clamp(var(--space-12), 7vw, var(--space-24)); }
.eyebrow {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-size: var(--text-xs); font-weight: 600; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--color-primary);
}
.section-title { font-size: var(--text-xl); margin-bottom: var(--space-4); }
.section-intro { color: var(--color-text-muted); font-size: var(--text-lg); max-width: 60ch; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--color-surface) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-divider);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); padding-block: var(--space-3); }
.brand { display: flex; align-items: center; gap: var(--space-3); font-family: var(--font-display); font-weight: 600; font-size: var(--text-base); color: var(--color-text); text-decoration: none; }
.brand svg { color: var(--color-primary); flex-shrink: 0; }
.brand small { display:block; font-family: var(--font-body); font-weight: 400; font-size: var(--text-xs); color: var(--color-text-muted); letter-spacing: 0.02em; }
.header-actions { display: flex; align-items: center; gap: var(--space-3); }
.nav-links { display: none; gap: var(--space-6); }
.nav-links a { text-decoration: none; font-size: var(--text-sm); font-weight: 500; color: var(--color-text-muted); }
.nav-links a:hover { color: var(--color-primary); }
@media (min-width: 920px) { .nav-links { display: flex; } }
.theme-toggle { width: 40px; height: 40px; display: grid; place-items: center; border-radius: var(--radius-full); color: var(--color-text-muted); border: 1px solid var(--color-border); }
.theme-toggle:hover { color: var(--color-primary); border-color: var(--color-primary); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  font-weight: 600; font-size: var(--text-sm); text-decoration: none;
  padding: 0.85rem 1.6rem; border-radius: var(--radius-full); white-space: nowrap;
}
.btn-primary { background: var(--color-primary); color: #fff; box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--color-primary-hover); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-ghost { background: transparent; color: var(--color-primary); border: 1px solid var(--color-border); }
.btn-ghost:hover { border-color: var(--color-primary); background: var(--color-primary-highlight); }
.btn-lg { padding: 1.05rem 2.1rem; font-size: var(--text-base); }
.btn-block { width: 100%; }

/* ---------- Hero ---------- */
.hero { padding-block: clamp(var(--space-12), 6vw, var(--space-20)); position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(80% 60% at 85% 0%, var(--color-primary-highlight) 0%, transparent 55%),
    radial-gradient(60% 50% at 0% 100%, var(--color-accent-highlight) 0%, transparent 50%);
  opacity: 0.6;
}
.hero-grid { display: grid; gap: var(--space-10); align-items: center; }
@media (min-width: 880px) { .hero-grid { grid-template-columns: 1.05fr 0.95fr; gap: var(--space-16); } }
.hero h1 { font-size: var(--text-2xl); margin-block: var(--space-4) var(--space-5); }
.hero h1 .accent { color: var(--color-primary); }
.hero-lead { font-size: var(--text-lg); color: var(--color-text-muted); margin-bottom: var(--space-6); max-width: 52ch; }
.hero-cta { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-bottom: var(--space-6); }
.hero-trust { display: flex; flex-wrap: wrap; gap: var(--space-5); }
.hero-trust-item { display: flex; align-items: center; gap: var(--space-2); font-size: var(--text-sm); color: var(--color-text-muted); font-weight: 500; }
.hero-trust-item svg { color: var(--color-success); flex-shrink: 0; }
.hero-media { position: relative; }
.hero-media img { border-radius: var(--radius-xl); box-shadow: var(--shadow-lg); width: 100%; object-fit: cover; }
.hero-badge {
  position: absolute; bottom: -1.25rem; left: 1.25rem;
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--space-4) var(--space-5);
  box-shadow: var(--shadow-md); display: flex; align-items: center; gap: var(--space-4);
}
.hero-badge .label { line-height: 1.3; }
.hero-badge .amount { font-family: var(--font-display); font-weight: 600; font-size: var(--text-lg); color: var(--color-primary); }
.hero-badge .label { font-size: var(--text-xs); color: var(--color-text-muted); }

/* ---------- Trust bar ---------- */
.trustbar { background: var(--color-surface); border-block: 1px solid var(--color-divider); }
.trustbar-inner { display: grid; gap: var(--space-6); padding-block: var(--space-8); grid-template-columns: repeat(2,1fr); }
@media (min-width: 720px) { .trustbar-inner { grid-template-columns: repeat(4,1fr); } }
.trust-stat { text-align: center; }
.trust-stat .num { font-family: var(--font-display); font-weight: 600; font-size: var(--text-xl); color: var(--color-primary); }
.trust-stat .desc { font-size: var(--text-sm); color: var(--color-text-muted); margin-top: var(--space-1); }

/* ---------- Cards / Why ---------- */
.cards { display: grid; gap: var(--space-6); margin-top: var(--space-10); }
@media (min-width: 720px) { .cards { grid-template-columns: repeat(3,1fr); } }
.card {
  background: var(--color-surface); border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg); padding: var(--space-6);
}
.card-icon { width: 48px; height: 48px; border-radius: var(--radius-md); display: grid; place-items: center; background: var(--color-primary-highlight); color: var(--color-primary); margin-bottom: var(--space-4); }
.card h3 { font-size: var(--text-lg); margin-bottom: var(--space-2); }
.card p { color: var(--color-text-muted); font-size: var(--text-sm); }

/* ---------- Wirkung (split) ---------- */
.split { display: grid; gap: var(--space-10); align-items: center; }
@media (min-width: 880px) { .split { grid-template-columns: 1fr 1fr; gap: var(--space-16); } }
.split img { border-radius: var(--radius-xl); box-shadow: var(--shadow-md); border: 1px solid var(--color-divider); background: #fff; }
.split p { color: var(--color-text-muted); margin-top: var(--space-4); }
.split .note { font-size: var(--text-sm); margin-top: var(--space-5); padding: var(--space-3) var(--space-4); background: var(--color-surface-offset); border-radius: var(--radius-md); color: var(--color-text-muted); }

/* ---------- Ablauf timeline ---------- */
.timeline { display: grid; gap: var(--space-5); margin-top: var(--space-10); counter-reset: step; }
@media (min-width: 720px) { .timeline { grid-template-columns: repeat(3,1fr); } }
.step {
  background: var(--color-surface); border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg); padding: var(--space-6); position: relative;
}
.step .num { display:inline-grid; place-items:center; width: 38px; height: 38px; border-radius: var(--radius-full); background: var(--color-primary); color:#fff; font-family: var(--font-display); font-weight: 600; margin-bottom: var(--space-3); }
.step h3 { font-size: var(--text-base); margin-bottom: var(--space-2); }
.step p { font-size: var(--text-sm); color: var(--color-text-muted); }
.step .dur { font-size: var(--text-xs); font-weight: 600; color: var(--color-accent); letter-spacing: 0.04em; text-transform: uppercase; }

/* ---------- Eignung ---------- */
.eligibility { background: var(--color-surface); border-block: 1px solid var(--color-divider); }
.elig-grid { display: grid; gap: var(--space-8); }
@media (min-width: 800px) { .elig-grid { grid-template-columns: 1fr 1fr; } }
.elig-list { list-style: none; display: grid; gap: var(--space-3); margin-top: var(--space-5); }
.elig-list li { display: flex; gap: var(--space-3); align-items: flex-start; font-size: var(--text-base); }
.elig-list svg { flex-shrink: 0; margin-top: 3px; }
.elig-list .yes svg { color: var(--color-success); }
.elig-list .no svg { color: var(--color-text-faint); }

/* ---------- Self-check ---------- */
.checker { background: var(--color-surface-2); border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: var(--space-8); box-shadow: var(--shadow-md); }
.checker h3 { font-size: var(--text-lg); margin-bottom: var(--space-2); }
.checker .lead { color: var(--color-text-muted); font-size: var(--text-sm); margin-bottom: var(--space-6); }
.q { margin-bottom: var(--space-5); }
.q-label { font-weight: 600; font-size: var(--text-sm); margin-bottom: var(--space-3); display: block; }
.opts { display: flex; gap: var(--space-3); flex-wrap: wrap; }
.opt {
  flex: 1; min-width: 90px; padding: 0.7rem 1rem; border: 1px solid var(--color-border);
  border-radius: var(--radius-md); background: var(--color-surface); font-size: var(--text-sm);
  font-weight: 500; text-align: center;
}
.opt:hover { border-color: var(--color-primary); }
.opt.active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.checker-result { margin-top: var(--space-5); padding: var(--space-5); border-radius: var(--radius-md); font-size: var(--text-sm); display: none; }
.checker-result.show { display: block; }
.checker-result.eligible { background: var(--color-success-highlight); color: var(--color-text); border: 1px solid color-mix(in srgb, var(--color-success) 35%, transparent); }
.checker-result.maybe { background: var(--color-accent-highlight); color: var(--color-text); border: 1px solid color-mix(in srgb, var(--color-accent) 35%, transparent); }
.checker-result strong { display: block; margin-bottom: var(--space-2); font-family: var(--font-display); font-size: var(--text-base); }
.checker-result .btn { margin-top: var(--space-4); }

/* ---------- Anmeldung / Kontakt ---------- */
.signup { background: linear-gradient(150deg, var(--color-primary) 0%, var(--color-primary-active) 100%); color: var(--color-text-inverse); }
[data-theme="dark"] .signup, :root:not([data-theme]) .signup { color: #eafafa; }
.signup .section-title, .signup p { color: inherit; }
.signup-grid { display: grid; gap: var(--space-10); align-items: start; }
@media (min-width: 860px) { .signup-grid { grid-template-columns: 0.9fr 1.1fr; gap: var(--space-16); } }
.signup-intro p { opacity: 0.92; margin-top: var(--space-4); }
.signup-contact { margin-top: var(--space-6); display: grid; gap: var(--space-3); }
.signup-contact a, .signup-contact span { display: flex; align-items: center; gap: var(--space-3); color: inherit; text-decoration: none; font-size: var(--text-sm); }
.signup-contact svg { opacity: 0.85; flex-shrink: 0; }
.signup-locations { margin-top: var(--space-6); }
.signup-locations-title { display: flex; align-items: center; gap: var(--space-3); font-weight: 600; font-size: var(--text-sm); letter-spacing: 0.04em; text-transform: uppercase; opacity: 0.92; }
.signup-locations-title svg { opacity: 0.85; flex-shrink: 0; }
.signup-locations-list { list-style: none; margin: var(--space-4) 0 0; padding: 0; display: grid; gap: var(--space-2); }
.signup-locations-list li { display: flex; align-items: baseline; gap: var(--space-2); font-size: var(--text-base); font-weight: 600; padding-left: var(--space-5); position: relative; }
.signup-locations-list li::before { content: ""; position: absolute; left: 0; top: 0.55em; width: 7px; height: 7px; border-radius: 50%; background: #bfeceb; }
.signup-locations-list li span { font-weight: 400; font-size: var(--text-sm); opacity: 0.8; }
.signup-locations-note { margin-top: var(--space-4); font-size: var(--text-sm); opacity: 0.82; }
.form-card { background: var(--color-surface); color: var(--color-text); border-radius: var(--radius-xl); padding: var(--space-8); box-shadow: var(--shadow-lg); }
.form-row { display: grid; gap: var(--space-4); }
@media (min-width: 520px) { .form-row.two { grid-template-columns: 1fr 1fr; } }
.field { margin-bottom: var(--space-4); }
.field label { display: block; font-size: var(--text-sm); font-weight: 600; margin-bottom: var(--space-2); }
.field .req { color: var(--color-error); }
.field input, .field textarea, .field select {
  width: 100%; padding: 0.8rem 1rem; border: 1px solid var(--color-border);
  border-radius: var(--radius-md); background: var(--color-surface-2); font-size: var(--text-base);
}
.field input:focus, .field textarea:focus { border-color: var(--color-primary); background: var(--color-surface); }
.consent { display: flex; gap: var(--space-3); align-items: flex-start; font-size: var(--text-xs); color: var(--color-text-muted); margin-block: var(--space-5); }
.consent input { width: 18px; height: 18px; margin-top: 2px; flex-shrink: 0; accent-color: var(--color-primary); }
.consent a { color: var(--color-primary); text-decoration: underline; }
.form-success { display: none; text-align: center; padding: var(--space-6) 0; }
.form-success.show { display: block; }
.form-success .check { width: 64px; height: 64px; margin: 0 auto var(--space-4); border-radius: var(--radius-full); background: var(--color-success-highlight); color: var(--color-success); display: grid; place-items: center; }
.form-success h3 { font-size: var(--text-lg); margin-bottom: var(--space-2); }
.form-success p { color: var(--color-text-muted); font-size: var(--text-sm); }

/* ---------- FAQ ---------- */
.faq-list { margin-top: var(--space-8); display: grid; gap: var(--space-3); max-width: var(--content-narrow); margin-inline: auto; }
.faq-item { border: 1px solid var(--color-divider); border-radius: var(--radius-md); background: var(--color-surface); overflow: hidden; }
.faq-q { width: 100%; display: flex; justify-content: space-between; align-items: center; gap: var(--space-4); padding: var(--space-5); font-weight: 600; font-size: var(--text-base); text-align: left; }
.faq-q svg { flex-shrink: 0; color: var(--color-primary); transition: transform var(--transition-interactive); }
.faq-item.open .faq-q svg { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 280ms ease; }
.faq-a-inner { padding: 0 var(--space-5) var(--space-5); color: var(--color-text-muted); font-size: var(--text-sm); }

/* ---------- Footer ---------- */
.site-footer { background: var(--color-surface); border-top: 1px solid var(--color-divider); padding-block: var(--space-10); font-size: var(--text-sm); }
.footer-grid { display: grid; gap: var(--space-8); }
@media (min-width: 720px) { .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; } }
.footer-grid h4 { font-family: var(--font-body); font-size: var(--text-sm); font-weight: 700; margin-bottom: var(--space-3); }
.footer-grid p, .footer-grid li { color: var(--color-text-muted); }
.footer-grid ul { list-style: none; display: grid; gap: var(--space-2); }
.footer-grid a { color: var(--color-text-muted); text-decoration: none; }
.footer-grid a:hover { color: var(--color-primary); }
.footer-meta { margin-top: var(--space-8); padding-top: var(--space-6); border-top: 1px solid var(--color-divider); display: flex; flex-wrap: wrap; gap: var(--space-4); justify-content: space-between; color: var(--color-text-faint); font-size: var(--text-xs); }
.footer-meta .ids { font-variant-numeric: tabular-nums; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }