/* Gas Blender Toolkit — marketing site
   Shared styles for /de/ and /en/ */

:root {
  --color-bg: #f8f9fa;
  --color-surface: #ffffff;
  --color-text: #212529;
  --color-text-muted: #5a6570;
  --color-border: #e6e9ec;
  --color-primary: #17a2b8;
  --color-primary-dark: #128294;
  --color-accent: #ff8a75;
  --color-shadow: rgba(23, 43, 56, 0.08);
  --radius: 14px;
  --max-width: 1120px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

:root[data-theme="dark"] {
  --color-bg: #10151a;
  --color-surface: #171f26;
  --color-text: #eef2f4;
  --color-text-muted: #a7b3bc;
  --color-border: #263038;
  --color-primary: #3fc6db;
  --color-primary-dark: #17a2b8;
  --color-accent: #ff9d8a;
  --color-shadow: rgba(0, 0, 0, 0.35);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg: #10151a;
    --color-surface: #171f26;
    --color-text: #eef2f4;
    --color-text-muted: #a7b3bc;
    --color-border: #263038;
    --color-primary: #3fc6db;
    --color-primary-dark: #17a2b8;
    --color-accent: #ff9d8a;
    --color-shadow: rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--color-primary-dark); }
:root[data-theme="dark"] a { color: var(--color-primary); }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) a { color: var(--color-primary); }
}

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- header ---------- */
.site-header {
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--color-text);
}
.brand img { width: 40px; height: 40px; }
.brand-name {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}
.lang-switch {
  display: flex;
  gap: 6px;
  font-size: 0.9rem;
}
.lang-switch a {
  padding: 6px 10px;
  border-radius: 8px;
  text-decoration: none;
  color: var(--color-text-muted);
  border: 1px solid transparent;
}
.lang-switch a[aria-current="true"] {
  color: var(--color-primary-dark);
  border-color: var(--color-border);
  background: var(--color-surface);
  font-weight: 600;
}

/* ---------- hero ---------- */
.hero {
  padding: 72px 0 56px;
  text-align: center;
}
.hero h1 {
  font-size: clamp(2rem, 4.5vw, 3rem);
  line-height: 1.15;
  margin: 0 0 18px;
  letter-spacing: -0.02em;
}
.hero p.lead {
  font-size: 1.2rem;
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0 auto 32px;
}
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-bottom: 14px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 22px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.98rem;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.12s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 8px 20px var(--color-shadow);
}
.btn-primary:hover { background: var(--color-primary-dark); }
.btn-outline {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-outline:hover { border-color: var(--color-primary); }
.btn[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
  pointer-events: none;
}
.hero-note {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ---------- sections ---------- */
section { padding: 56px 0; }
.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 40px;
}
.section-head h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin: 0 0 12px;
  letter-spacing: -0.01em;
}
.section-head p {
  color: var(--color-text-muted);
  margin: 0;
}
.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary-dark);
  background: color-mix(in srgb, var(--color-primary) 14%, transparent);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 14px;
}

/* ---------- feature grid ---------- */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}
.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
}
.feature-card .icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: color-mix(in srgb, var(--color-primary) 16%, transparent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 1.3rem;
}
.feature-card h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}
.feature-card p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.94rem;
}

/* ---------- showcase (screenshots) ---------- */
.showcase-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  padding: 40px 0;
}
.showcase-row:not(:last-child) {
  border-bottom: 1px solid var(--color-border);
}
.showcase-row.reverse .showcase-text { order: 2; }
.showcase-media {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: 0 20px 44px var(--color-shadow);
}
.showcase-text h3 {
  font-size: 1.4rem;
  margin: 0 0 12px;
  letter-spacing: -0.01em;
}
.showcase-text p {
  color: var(--color-text-muted);
  margin: 0 0 14px;
}
.showcase-text ul {
  margin: 0;
  padding-left: 1.1em;
  color: var(--color-text-muted);
}
.showcase-text li { margin-bottom: 6px; }

@media (max-width: 760px) {
  .showcase-row, .showcase-row.reverse .showcase-text {
    grid-template-columns: 1fr;
    order: initial;
  }
  .showcase-row { grid-template-columns: 1fr; }
}

/* ---------- how it works ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  counter-reset: step;
}
.step {
  position: relative;
  padding: 28px 22px 22px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}
.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  top: -14px;
  left: 22px;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  box-shadow: 0 4px 10px var(--color-shadow);
}
.step h3 { margin: 6px 0 8px; font-size: 1.02rem; }
.step p { margin: 0; color: var(--color-text-muted); font-size: 0.94rem; }

/* ---------- get-the-app ---------- */
.apps-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 32px;
  align-items: center;
}
.apps-panel h2 { margin-top: 0; }
.apps-panel p { color: var(--color-text-muted); }
.app-links { display: flex; flex-direction: column; gap: 10px; }
@media (max-width: 760px) {
  .apps-panel { grid-template-columns: 1fr; }
}

/* ---------- final cta ---------- */
.final-cta {
  text-align: center;
  background: linear-gradient(135deg, color-mix(in srgb, var(--color-primary) 16%, transparent), color-mix(in srgb, var(--color-accent) 14%, transparent));
  border-radius: 24px;
  padding: 56px 24px;
}
.final-cta h2 { margin: 0 0 12px; }
.final-cta p { color: var(--color-text-muted); margin: 0 0 26px; }

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 28px 0 40px;
  color: var(--color-text-muted);
  font-size: 0.88rem;
}
.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  justify-content: space-between;
  align-items: center;
}
.footer-links { display: flex; gap: 18px; flex-wrap: wrap; }
.footer-links a { color: var(--color-text-muted); text-decoration: none; }
.footer-links a:hover { color: var(--color-primary-dark); }

/* ---------- reveal-email (spam guard) ---------- */
.reveal-email button {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-primary-dark);
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 0.88rem;
  cursor: pointer;
}
.reveal-email span { font-weight: 600; }

/* ---------- simple page (impressum) ---------- */
.doc {
  max-width: 720px;
  margin: 0 auto;
  padding: 56px 24px 80px;
}
.doc h1 { margin-top: 0; }
.doc h2 { margin-top: 2em; font-size: 1.15rem; }
.doc p { color: var(--color-text-muted); }