:root {
  color-scheme: light dark;
  --background: #f4f6fb;
  --surface: #ffffff;
  --surface-soft: #eef2fa;
  --text: #121a2b;
  --muted: #55607a;
  --accent: #2453a6;
  --accent-strong: #173d80;
  --accent-soft: #e6edfb;
  --accent-contrast: #ffffff;
  --teal: #0f8f8a;
  --border: #dde3ee;
  --shadow-sm: 0 1px 2px rgb(18 26 43 / 6%), 0 2px 8px rgb(18 26 43 / 4%);
  --shadow: 0 2px 4px rgb(18 26 43 / 4%), 0 18px 40px rgb(18 26 43 / 9%);
  --radius-sm: 0.6rem;
  --radius: 1rem;
  --radius-lg: 1.6rem;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-synthesis: none;
  -webkit-text-size-adjust: 100%;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--background);
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background: var(--background);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

::selection {
  color: var(--accent-contrast);
  background: var(--accent);
}

a {
  color: var(--accent);
  text-decoration-thickness: 0.07em;
  text-underline-offset: 0.2em;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--accent-strong);
  text-decoration-thickness: 0.12em;
}

:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 55%, transparent);
  outline-offset: 3px;
  border-radius: 0.35rem;
}

.skip-link {
  position: absolute;
  top: -4rem;
  left: 1rem;
  z-index: 30;
  padding: 0.6rem 0.9rem;
  color: var(--accent-contrast);
  background: var(--accent);
  border-radius: var(--radius-sm);
}

.skip-link:focus {
  top: 1rem;
  color: var(--accent-contrast);
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid color-mix(in srgb, var(--border) 70%, transparent);
  background: color-mix(in srgb, var(--background) 78%, transparent);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  backdrop-filter: saturate(180%) blur(18px);
}

.header-inner,
.page,
.footer-inner {
  width: min(100% - 2.5rem, 72rem);
  margin-inline: auto;
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  padding-block: 0.75rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin-right: auto;
  color: var(--text);
  font-size: 1.15rem;
  font-weight: 750;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.brand img {
  display: block;
  width: 1.85rem;
  height: 1.85rem;
  border-radius: 0.5rem;
  box-shadow: var(--shadow-sm);
}

.brand:hover {
  color: var(--text);
}

.site-nav,
.language-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem;
  align-items: center;
}

.site-nav a,
.language-nav a {
  padding: 0.38rem 0.8rem;
  color: var(--muted);
  font-size: 0.93rem;
  font-weight: 550;
  text-decoration: none;
  border-radius: 999px;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.site-nav a:hover,
.language-nav a:hover {
  color: var(--text);
  background: color-mix(in srgb, var(--text) 7%, transparent);
}

.site-nav a[aria-current="page"] {
  color: var(--accent-strong);
  background: var(--accent-soft);
}

.language-nav {
  padding: 0.2rem;
  background: color-mix(in srgb, var(--text) 6%, transparent);
  border-radius: 999px;
}

.language-nav a {
  padding: 0.22rem 0.7rem;
  font-size: 0.82rem;
  font-weight: 650;
  letter-spacing: 0.03em;
}

.language-nav a[aria-current="page"] {
  color: var(--text);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

/* Page */

.page {
  flex: 1;
  padding-block: clamp(1.75rem, 5vw, 4rem) clamp(3rem, 8vw, 6rem);
}

h1,
h2,
h3 {
  line-height: 1.15;
  letter-spacing: -0.03em;
  text-wrap: balance;
}

h1 {
  max-width: 18ch;
  margin: 0;
  font-size: clamp(2.2rem, 6.5vw, 4.1rem);
  font-weight: 800;
}

h2 {
  margin: 3rem 0 0.9rem;
  font-size: clamp(1.45rem, 3.4vw, 1.95rem);
  font-weight: 750;
}

h3 {
  margin: 2rem 0 0.6rem;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.015em;
}

p,
ul,
ol,
dl {
  margin-block: 0 1rem;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 1rem;
  padding: 0.28rem 0.75rem;
  color: var(--accent-strong);
  background: var(--accent-soft);
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 750;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.lead {
  max-width: 62ch;
  margin: 1.1rem 0 0;
  color: var(--muted);
  font-size: clamp(1.08rem, 2.3vw, 1.3rem);
  line-height: 1.55;
  text-wrap: pretty;
}

.meta {
  color: var(--muted);
  font-size: 0.9rem;
}

/* Hero */

.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.75rem, 6vw, 4.5rem);
  background:
    radial-gradient(60rem 26rem at 105% -20%, color-mix(in srgb, var(--teal) 22%, transparent), transparent 60%),
    radial-gradient(48rem 24rem at -10% 120%, color-mix(in srgb, var(--accent) 24%, transparent), transparent 62%),
    var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.hero-icon {
  display: block;
  width: 6.5rem;
  height: 6.5rem;
  margin-bottom: 1.5rem;
  border-radius: 1.45rem;
  box-shadow: 0 14px 30px rgb(11 17 28 / 28%);
}

.hero-claim {
  max-width: 62ch;
  margin: 1.25rem 0 0;
  padding-left: 0.9rem;
  border-left: 0.2rem solid var(--teal);
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.9rem;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.72rem 1.3rem;
  color: var(--accent-contrast);
  background: var(--accent);
  border: 1px solid transparent;
  border-radius: 999px;
  box-shadow: 0 8px 20px color-mix(in srgb, var(--accent) 30%, transparent);
  font-size: 0.98rem;
  font-weight: 650;
  text-decoration: none;
  transition: transform 0.15s ease, background-color 0.15s ease, box-shadow 0.15s ease;
}

.button:hover {
  color: var(--accent-contrast);
  background: var(--accent-strong);
  transform: translateY(-1px);
}

.button.secondary {
  color: var(--text);
  background: var(--surface);
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
}

.button.secondary:hover {
  color: var(--text);
  background: var(--surface-soft);
}

/* Cards */

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.1rem;
  margin-block: 1.5rem 0;
  counter-reset: card;
}

.card,
.notice,
details,
.toc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.card {
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  counter-increment: card;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}

.card::before {
  display: grid;
  width: 2.3rem;
  height: 2.3rem;
  margin-bottom: 1rem;
  place-items: center;
  color: var(--accent-contrast);
  background: linear-gradient(140deg, var(--accent), var(--teal));
  border-radius: 0.75rem;
  font-size: 0.95rem;
  font-weight: 750;
  content: counter(card);
}

.card h2,
.card h3 {
  margin: 0 0 0.4rem;
  font-size: 1.25rem;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.notice {
  margin-block: 1.5rem;
  padding: 1rem 1.2rem;
  background: color-mix(in srgb, var(--accent) 7%, var(--surface));
  border-color: color-mix(in srgb, var(--accent) 22%, var(--border));
  border-left: 0.3rem solid var(--accent);
}

.notice > :first-child {
  margin-top: 0;
}

.notice > :last-child {
  margin-bottom: 0;
}

/* Videos */

.videos {
  margin-top: clamp(2.5rem, 6vw, 4rem);
}

.videos > h2 {
  margin: 0 0 0.4rem;
}

.section-lead {
  max-width: 62ch;
  margin-bottom: 1.4rem;
  color: var(--muted);
}

.video-tabs {
  position: relative;
  padding: clamp(0.9rem, 2.5vw, 1.5rem);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.video-tabs > input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.tab-bar {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.4rem;
  padding: 0.35rem;
  background: var(--surface-soft);
  border-radius: 1.1rem;
}

.tab-bar label {
  display: flex;
  flex-direction: column;
  gap: 0.05rem;
  padding: 0.6rem 0.9rem;
  border-radius: 0.8rem;
  cursor: pointer;
  transition: background-color 0.15s ease, box-shadow 0.15s ease;
}

.tab-bar label:hover {
  background: color-mix(in srgb, var(--surface) 60%, transparent);
}

.tab-name {
  font-weight: 700;
  letter-spacing: -0.01em;
}

.tab-meta {
  color: var(--muted);
  font-size: 0.8rem;
}

#vt-coaching:checked ~ .tab-bar label[for="vt-coaching"],
#vt-delegierte:checked ~ .tab-bar label[for="vt-delegierte"],
#vt-analyse-mac:checked ~ .tab-bar label[for="vt-analyse-mac"],
#vt-produktvideo:checked ~ .tab-bar label[for="vt-produktvideo"] {
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

#vt-coaching:checked ~ .tab-bar label[for="vt-coaching"] .tab-name,
#vt-delegierte:checked ~ .tab-bar label[for="vt-delegierte"] .tab-name,
#vt-analyse-mac:checked ~ .tab-bar label[for="vt-analyse-mac"] .tab-name,
#vt-produktvideo:checked ~ .tab-bar label[for="vt-produktvideo"] .tab-name {
  color: var(--accent);
}

#vt-coaching:focus-visible ~ .tab-bar label[for="vt-coaching"],
#vt-delegierte:focus-visible ~ .tab-bar label[for="vt-delegierte"],
#vt-analyse-mac:focus-visible ~ .tab-bar label[for="vt-analyse-mac"],
#vt-produktvideo:focus-visible ~ .tab-bar label[for="vt-produktvideo"] {
  outline: 3px solid color-mix(in srgb, var(--accent) 55%, transparent);
  outline-offset: 2px;
}

.video-panel {
  display: none;
  grid-template-columns: minmax(0, 2.4fr) minmax(0, 1fr);
  gap: clamp(1rem, 3vw, 2rem);
  align-items: center;
  margin-top: clamp(0.9rem, 2.5vw, 1.5rem);
}

#vt-coaching:checked ~ .video-panels #vp-coaching,
#vt-delegierte:checked ~ .video-panels #vp-delegierte,
#vt-analyse-mac:checked ~ .video-panels #vp-analyse-mac,
#vt-produktvideo:checked ~ .video-panels #vp-produktvideo {
  display: grid;
}

.video-frame {
  margin: 0;
}

.video-frame video {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  background: #0b111c;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.video-info h3 {
  margin: 0 0 0.5rem;
  font-size: 1.45rem;
  letter-spacing: -0.025em;
}

.video-info p {
  color: var(--muted);
}

.video-badge {
  display: inline-block;
  margin-bottom: 0.8rem;
  padding: 0.2rem 0.7rem;
  background: var(--accent-soft);
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.video-info .video-badge {
  color: var(--accent-strong);
}

.checks {
  margin: 0;
  padding: 0;
  list-style: none;
}

.checks li {
  position: relative;
  margin-block: 0.45rem;
  padding-left: 1.7rem;
  font-size: 0.97rem;
}

.checks li::before {
  position: absolute;
  top: 0.42em;
  left: 0.2rem;
  width: 0.75rem;
  height: 0.4rem;
  border-bottom: 2.5px solid var(--teal);
  border-left: 2.5px solid var(--teal);
  transform: rotate(-45deg);
  content: "";
}

.video-link {
  margin: -0.3rem 0 1.1rem;
}

.video-link a {
  display: inline-block;
  padding: 0.3rem 0.85rem;
  color: var(--accent-strong);
  background: var(--accent-soft);
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 650;
  text-decoration: none;
}

.video-link a:hover {
  background: color-mix(in srgb, var(--accent) 22%, var(--surface));
}

/* Screenshots */

.screenshots {
  margin-top: clamp(2.5rem, 6vw, 4rem);
}

.screenshots > h2 {
  margin-top: 0;
}

.shots {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}

.shot {
  margin: 0;
}

.shot a {
  display: block;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.shot a:hover {
  box-shadow: var(--shadow);
  transform: translateY(-4px);
}

.shot img {
  display: block;
  width: 100%;
  height: auto;
}

.shot figcaption {
  margin-top: 0.65rem;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.45;
}

/* Text content */

.content {
  max-width: 46rem;
}

.page.content > h1 {
  max-width: none;
  font-size: clamp(2rem, 5.5vw, 3.1rem);
  overflow-wrap: anywhere;
  hyphens: auto;
}

.page.content > .lead {
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--border);
}

.page.content > h2 {
  margin-top: 2.5rem;
  font-size: 1.35rem;
}

.content li {
  margin-block: 0.35rem;
}

.content ul,
.content ol {
  padding-left: 1.3rem;
}

.content ul li::marker {
  color: var(--accent);
}

/* FAQ */

.faq {
  display: grid;
  gap: 0.65rem;
}

details {
  padding: 0;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.15s ease;
}

details[open] {
  border-color: color-mix(in srgb, var(--accent) 35%, var(--border));
}

details summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.2rem;
  font-weight: 650;
  list-style: none;
  cursor: pointer;
}

details summary::-webkit-details-marker {
  display: none;
}

details summary::after {
  flex: none;
  width: 0.55rem;
  height: 0.55rem;
  margin-right: 0.2rem;
  border-right: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  transform: translateY(-0.15rem) rotate(45deg);
  transition: transform 0.2s ease;
  content: "";
}

details[open] summary::after {
  transform: translateY(0.1rem) rotate(-135deg);
}

details > :not(summary) {
  margin: 0;
  padding: 0 1.2rem 1.1rem;
  color: var(--muted);
}

dt {
  margin-top: 1rem;
  font-weight: 700;
}

dd {
  margin-left: 0;
  color: var(--muted);
}

code {
  padding: 0.12em 0.4em;
  background: var(--accent-soft);
  border-radius: 0.35rem;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.88em;
  overflow-wrap: anywhere;
}

/* Guide */

.guide-layout {
  display: grid;
  grid-template-columns: 17rem minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: start;
  margin-top: clamp(2rem, 5vw, 3.5rem);
}

.toc {
  position: sticky;
  top: 5.5rem;
  max-height: calc(100vh - 7rem);
  padding: 1.2rem 1.1rem;
  overflow-y: auto;
  box-shadow: var(--shadow-sm);
}

.toc h2 {
  margin: 0 0 0.6rem 0.6rem;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 750;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.toc ol {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: toc;
}

.toc li {
  counter-increment: toc;
}

.toc a {
  display: flex;
  gap: 0.6rem;
  padding: 0.4rem 0.6rem;
  color: var(--text);
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  line-height: 1.35;
  text-decoration: none;
}

.toc a::before {
  flex: none;
  min-width: 1.3rem;
  color: var(--accent);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  content: counter(toc);
}

.toc a:hover {
  background: var(--accent-soft);
}

.guide > section {
  padding-bottom: 2.5rem;
  margin-bottom: 2.5rem;
  border-bottom: 1px solid var(--border);
}

.guide > section:last-child {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: 0;
}

.guide > section > h2:first-child,
.guide > .notice:first-child {
  margin-top: 0;
}

.guide > .notice:first-child {
  margin-bottom: 2.5rem;
}

.content .steps {
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.steps li {
  position: relative;
  min-height: 2rem;
  margin-block: 0.85rem;
  padding-left: 2.9rem;
  counter-increment: step;
}

.steps li::before {
  position: absolute;
  top: -0.05rem;
  left: 0;
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  color: var(--accent-strong);
  background: var(--accent-soft);
  border-radius: 50%;
  font-size: 0.88rem;
  font-weight: 750;
  font-variant-numeric: tabular-nums;
  content: counter(step);
}

.guide dl {
  display: grid;
  gap: 0.65rem;
}

.guide dl > dt {
  margin: 0;
  padding: 0.9rem 1.1rem 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-bottom: 0;
  border-radius: var(--radius) var(--radius) 0 0;
}

.guide dl > dd {
  margin-top: -0.65rem;
  padding: 0.2rem 1.1rem 0.9rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: 0;
  border-radius: 0 0 var(--radius) var(--radius);
}

.guide-shot {
  max-width: 21rem;
  margin-block: 1.75rem;
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding-block: 1.75rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-inner p {
  margin: 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.25rem;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--text);
  text-decoration: underline;
}

/* Responsive */

@media (max-width: 60rem) {
  .guide-layout {
    grid-template-columns: 1fr;
  }

  .toc {
    position: static;
    max-height: none;
  }

  .toc ol {
    columns: 2;
    column-gap: 1rem;
  }

  .toc li {
    break-inside: avoid;
  }
}

@media (max-width: 52rem) {
  .video-panel {
    grid-template-columns: 1fr;
  }

  .tab-bar {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .shots {
    grid-auto-columns: min(72%, 19rem);
    grid-auto-flow: column;
    grid-template-columns: none;
    margin-inline: -1.25rem;
    padding: 0.5rem 1.25rem 1rem;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-padding-inline: 1.25rem;
  }

  .shots .shot {
    scroll-snap-align: start;
  }

  .site-nav {
    order: 3;
    width: 100%;
    margin-inline: -0.5rem;
  }
}

@media (max-width: 36rem) {
  .header-inner,
  .page,
  .footer-inner {
    width: min(100% - 2rem, 72rem);
  }

  .shots {
    margin-inline: -1rem;
    padding-inline: 1rem;
    scroll-padding-inline: 1rem;
  }

  .site-nav a {
    padding-inline: 0.6rem;
    font-size: 0.88rem;
  }

  .toc ol {
    columns: 1;
  }

  .hero {
    border-radius: var(--radius);
  }

  .button {
    flex: 1 1 100%;
    justify-content: center;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #0b111c;
    --surface: #141c2b;
    --surface-soft: #1b2538;
    --text: #edf2fb;
    --muted: #a9b5ca;
    --accent: #8bb2ff;
    --accent-strong: #b3ccff;
    --accent-soft: #1d2a45;
    --accent-contrast: #071124;
    --teal: #4fd1c9;
    --border: #283349;
    --shadow-sm: 0 1px 2px rgb(0 0 0 / 30%);
    --shadow: 0 18px 40px rgb(0 0 0 / 35%);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  * {
    transition: none !important;
  }
}

@media print {
  .site-header,
  .site-footer,
  .toc,
  .hero-actions {
    display: none;
  }
}