:root {
  --bg: #f7f9fb;
  --surface: #ffffff;
  --surface-2: #f0f4f8;
  --text: #1c2733;
  --text-soft: #44566b;
  --muted: #6b7d90;
  --border: #dce4ec;
  --accent: #1f6feb;
  --accent-2: #14b8a6;
  --accent-soft: #e8f1fe;
  --accent-2-soft: #e4f7f4;
  --shadow: 0 1px 2px rgba(20,40,80,.04), 0 8px 24px rgba(20,40,80,.06);
  --radius: 14px;
  --radius-sm: 8px;
  --max: 1120px;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { line-height: 1.25; color: var(--text); font-weight: 600; letter-spacing: -0.01em; margin: 0; }
h1 { font-size: clamp(1.9rem, 4vw, 3rem); }
h2 { font-size: clamp(1.4rem, 2.4vw, 1.9rem); }
h3 { font-size: 1.15rem; }

.container { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.skip-link { position: absolute; left: -999px; top: 8px; background: var(--accent); color: #fff; padding: 10px 16px; border-radius: var(--radius-sm); z-index: 100; }
.skip-link:focus { left: 8px; color: #fff; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.85); backdrop-filter: saturate(160%) blur(10px); border-bottom: 1px solid var(--border); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 14px 24px; max-width: var(--max); margin: 0 auto; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 600; font-size: 1.05rem; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand-mark { flex: 0 0 auto; }

.primary-nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 4px; }
.primary-nav a { display: inline-block; padding: 8px 12px; border-radius: var(--radius-sm); color: var(--text-soft); font-size: .95rem; font-weight: 500; }
.primary-nav a:hover { background: var(--surface-2); text-decoration: none; color: var(--text); }
.primary-nav a[aria-current="page"] { color: var(--accent); background: var(--accent-soft); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; padding: 8px; cursor: pointer; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: transform .2s, opacity .2s; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-nav { display: none; padding: 8px 24px 18px; background: var(--surface); border-bottom: 1px solid var(--border); }
.mobile-nav ul { list-style: none; margin: 0; padding: 0; }
.mobile-nav a { display: block; padding: 12px 8px; color: var(--text-soft); border-bottom: 1px solid var(--border); }
.mobile-nav a[aria-current="page"] { color: var(--accent); }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 22px; border-radius: var(--radius-sm); font-weight: 600; font-size: .97rem; border: 1px solid transparent; cursor: pointer; transition: transform .08s, background .15s, border-color .15s; text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #1858c4; text-decoration: none; }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn-ghost:hover { background: var(--surface-2); text-decoration: none; }
.btn-accent2 { background: var(--accent-2); color: #fff; }
.btn-accent2:hover { background: #0f9e8f; text-decoration: none; }
.btn-steam { background: #1b2838; color: #fff; }
.btn-steam:hover { background: #2a475e; text-decoration: none; }

.hero { padding: 72px 0 56px; }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.hero h1 { margin: 0 0 18px; }
.hero p { color: var(--text-soft); font-size: 1.1rem; max-width: 56ch; margin: 0; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.hero-eyebrow { color: var(--accent-2); font-weight: 600; font-size: .85rem; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 14px; }
.hero-figure { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--border); background: var(--surface); }
.hero-figure img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }

.section { padding: 56px 0; }
.section-soft { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-head { margin-bottom: 32px; max-width: 70ch; }
.section-head h2 { margin: 0 0 10px; }
.section-head p { color: var(--text-soft); margin: 0; }
.eyebrow { color: var(--accent-2); font-weight: 600; font-size: .8rem; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 10px; display: block; }

.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 22px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; display: flex; flex-direction: column; transition: box-shadow .15s, transform .15s, border-color .15s; }
.card:hover { box-shadow: var(--shadow); transform: translateY(-2px); border-color: #c8d6e6; }
.card-media { aspect-ratio: 16/10; overflow: hidden; background: var(--surface-2); }
.card-media img { width: 100%; height: 100%; object-fit: cover; }
.card-body { padding: 18px 20px 22px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.card-meta { display: flex; gap: 10px; font-size: .8rem; color: var(--muted); font-family: var(--font-mono); align-items: center; }
.card-meta .tag { background: var(--accent-2-soft); color: #0c8474; padding: 2px 8px; border-radius: 999px; font-weight: 500; }
.card h3 a { color: var(--text); }
.card h3 a:hover { color: var(--accent); text-decoration: none; }
.card p { margin: 0; color: var(--text-soft); font-size: .95rem; }
.card-link { margin-top: auto; font-weight: 600; color: var(--accent); font-size: .9rem; }

.article { max-width: 760px; margin: 0 auto; }
.article h1 { margin-bottom: 12px; }
.article .lead { font-size: 1.15rem; color: var(--text-soft); margin: 0 0 28px; }
.article h2 { margin: 36px 0 12px; }
.article p { color: var(--text-soft); margin: 0 0 12px; }
.article section { margin-bottom: 24px; }
.callout { border-left: 4px solid var(--accent-2); background: var(--accent-2-soft); padding: 16px 20px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; margin: 28px 0; }
.callout .callout-label { font-weight: 700; color: #0c8474; font-size: .8rem; letter-spacing: .06em; text-transform: uppercase; }
.callout p { margin: 6px 0 0; color: var(--text); }

.diagram { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); padding: 24px; margin: 28px 0; }
.diagram h3 { margin: 0 0 16px; }
.diagram-steps { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.diagram-step { background: var(--accent-soft); color: var(--accent); font-weight: 600; padding: 10px 16px; border-radius: 999px; font-size: .9rem; }
.diagram-arrow { color: var(--muted); font-family: var(--font-mono); }

.related { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--border); }
.related h2 { font-size: 1.2rem; margin: 0 0 14px; }
.related ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }

.pathway { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-top: 12px; }
.pathway-item { border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; background: var(--surface); }
.pathway-item h3 { margin: 0 0 6px; font-size: 1rem; }
.pathway-item p { margin: 0; font-size: .9rem; color: var(--text-soft); }

.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; }
.feature { border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; background: var(--surface); }
.feature h3 { margin: 0 0 8px; font-size: 1.05rem; }
.feature p { margin: 0; color: var(--text-soft); font-size: .93rem; }
.feature .feature-icon { width: 36px; height: 36px; border-radius: 10px; background: var(--accent-soft); display: grid; place-items: center; margin-bottom: 12px; color: var(--accent); }

.app-mockup { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); overflow: hidden; box-shadow: var(--shadow); }
.app-mockup-bar { display: flex; gap: 6px; padding: 12px 16px; background: var(--surface-2); border-bottom: 1px solid var(--border); }
.app-mockup-bar span { width: 11px; height: 11px; border-radius: 50%; background: #d3dce6; }
.app-mockup-body { padding: 22px; display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.app-mockup-tile { border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 14px; background: var(--bg); }
.app-mockup-tile .label { font-size: .72rem; color: var(--muted); font-family: var(--font-mono); text-transform: uppercase; letter-spacing: .06em; }
.app-mockup-tile .value { font-size: 1.05rem; font-weight: 600; color: var(--text); margin-top: 4px; }
.app-bar { height: 8px; border-radius: 4px; background: linear-gradient(90deg, var(--accent), var(--accent-2)); margin-top: 10px; }

.form { display: grid; gap: 18px; max-width: 640px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-weight: 600; font-size: .95rem; }
.field input, .field textarea, .field select { font: inherit; padding: 12px 14px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--surface); color: var(--text); width: 100%; }
.field input:focus, .field textarea:focus, .field select:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px var(--accent-soft); }
.field .error { color: #c0392b; font-size: .85rem; min-height: 1em; }
.field.invalid input, .field.invalid textarea { border-color: #c0392b; }
.form-status { padding: 14px 16px; border-radius: var(--radius-sm); font-weight: 500; }
.form-status.success { background: var(--accent-2-soft); color: #0c8474; border: 1px solid #b6e8df; }
.form-status.error { background: #fdecea; color: #a93226; border: 1px solid #f5c6c2; }

.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.contact-details address { font-style: normal; line-height: 1.9; }
.contact-details .label { color: var(--muted); font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; font-family: var(--font-mono); }

.legal { max-width: 760px; margin: 0 auto; }
.legal h1 { margin-bottom: 8px; }
.legal .updated { color: var(--muted); font-size: .9rem; margin: 0 0 28px; }
.legal h2 { margin: 32px 0 10px; font-size: 1.2rem; }
.legal p { color: var(--text-soft); margin: 0 0 12px; }
.legal ul { color: var(--text-soft); padding-left: 1.2em; }
.legal table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: .92rem; }
.legal th, .legal td { border: 1px solid var(--border); padding: 10px 12px; text-align: left; }
.legal th { background: var(--surface-2); font-weight: 600; color: var(--text); }

.error-page { text-align: center; padding: 100px 0 80px; }
.error-page .code { font-family: var(--font-mono); font-size: clamp(4rem, 12vw, 8rem); font-weight: 700; color: var(--accent); line-height: 1; margin: 0; }
.error-page h1 { margin: 16px 0 12px; }
.error-page p { color: var(--text-soft); max-width: 50ch; margin: 0 auto 24px; }
.error-page .actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.site-footer { background: var(--surface); border-top: 1px solid var(--border); padding: 48px 0 28px; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; }
.footer-brand { font-weight: 700; font-size: 1.1rem; margin: 0 0 8px; }
.footer-desc { color: var(--text-soft); font-size: .92rem; margin: 0; max-width: 40ch; }
.footer-contact { font-style: normal; color: var(--text-soft); font-size: .92rem; }
.footer-contact a { color: var(--text-soft); }
.footer-contact a:hover { color: var(--accent); }
.footer-nav-title { font-weight: 600; color: var(--text); margin: 0 0 10px; font-size: .85rem; text-transform: uppercase; letter-spacing: .06em; }
.footer-nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.footer-nav a { color: var(--text-soft); font-size: .92rem; }
.footer-bottom { border-top: 1px solid var(--border); margin-top: 32px; padding-top: 20px; }
.footer-disclaimer { color: var(--muted); font-size: .82rem; margin: 0 0 8px; max-width: 80ch; }
.footer-copy { color: var(--muted); font-size: .82rem; margin: 0; }

.cookie-banner { position: fixed; left: 0; right: 0; bottom: 0; z-index: 60; background: var(--surface); border-top: 1px solid var(--border); box-shadow: 0 -8px 24px rgba(20,40,80,.08); padding: 16px 0; }
.cookie-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.cookie-text { margin: 0; color: var(--text-soft); font-size: .9rem; max-width: 70ch; }
.cookie-actions { display: flex; gap: 10px; flex-shrink: 0; }

@media (max-width: 860px) {
  .primary-nav { display: none; }
  .nav-toggle { display: flex; }
  .hero-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .app-mockup-body { grid-template-columns: 1fr; }
}
@media (min-width: 861px) {
  .mobile-nav { display: none !important; }
}
@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; }
  .cookie-inner { flex-direction: column; align-items: stretch; }
}