/* app4all — one-page site. System fonts, light + dark mode, no external resources. */
:root {
  --bg: #f7f8fb;
  --surface: #ffffff;
  --alt: #eef2fb;
  --text: #141821;
  --muted: #5a6273;
  --border: #dde2ec;
  --accent: #2f6fed;
  --accent-ink: #ffffff;
  --accent-soft: #e3ebfd;
  --shadow: 0 1px 2px rgba(20, 24, 33, .05), 0 8px 24px rgba(20, 24, 33, .06);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1218;
    --surface: #171b24;
    --alt: #131722;
    --text: #e8ebf2;
    --muted: #9aa3b5;
    --border: #283042;
    --accent: #6f9bff;
    --accent-ink: #0f1218;
    --accent-soft: #1d2740;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .25);
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  overflow-wrap: break-word;
}
a { color: var(--accent); }
img, svg { display: block; max-width: 100%; }
h1, h2, h3 { line-height: 1.15; margin: 0 0 .5em; letter-spacing: -.01em; }
p { margin: 0 0 1em; }

.wrap { width: 100%; max-width: 1040px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 640px) { .wrap { padding: 0 24px; } }

/* Header */
.top { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(150%) blur(10px); -webkit-backdrop-filter: saturate(150%) blur(10px);
  border-bottom: 1px solid var(--border); }
.top__inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; font-size: 1.15rem; }
.brand b { color: var(--accent); }
.top__nav { display: flex; gap: 18px; }
.top__nav a { color: var(--muted); text-decoration: none; font-size: .95rem; }
.top__nav a:hover { color: var(--text); }

/* Hero */
.hero { padding: 72px 0 64px; }
@media (min-width: 768px) { .hero { padding: 120px 0 104px; } }
.eyebrow { text-transform: uppercase; letter-spacing: .12em; font-size: .8rem; font-weight: 600; color: var(--accent); margin-bottom: 14px; }
.hero h1 { font-size: clamp(2.3rem, 8vw, 4.4rem); font-weight: 800; }
.hero h1 .accent { color: var(--accent); }
.hero h1 .dash { color: var(--muted); font-weight: 400; }
.hero__tag { white-space: nowrap; }
.lead { font-size: clamp(1.1rem, 2.6vw, 1.35rem); color: var(--muted); max-width: 38em; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }

.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 0 22px;
  border-radius: 12px; border: 1px solid var(--border); background: var(--surface); color: var(--text);
  text-decoration: none; font-weight: 600; }
.btn:hover { border-color: var(--accent); }
.btn--primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn--primary:hover { filter: brightness(1.08); }
a:focus-visible, .btn:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }

/* Sections */
.section { padding: 64px 0; }
.section--alt { background: var(--alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section h2 { font-size: clamp(1.6rem, 4vw, 2.2rem); margin-bottom: 28px; }

.cards { display: grid; gap: 18px; grid-template-columns: 1fr; }
@media (min-width: 720px) { .cards { grid-template-columns: repeat(3, 1fr); } }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 24px; box-shadow: var(--shadow); }
.card h3 { font-size: 1.2rem; }
.card p { color: var(--muted); margin: 0; }
.card__icon { width: 48px; height: 48px; border-radius: 12px; display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent); margin-bottom: 16px; }

.contact h2 { margin-bottom: 12px; }
.contact p { color: var(--muted); }
.mail { font-size: clamp(1.3rem, 5vw, 1.8rem); font-weight: 700; text-decoration: none; }
.mail:hover { text-decoration: underline; }

/* Footer */
.foot { padding: 32px 0 40px; color: var(--muted); font-size: .9rem; }
.foot__inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 32px; }
.foot p { margin: 0; }
.foot a { color: var(--text); }

@media (max-width: 420px) { .top__nav { gap: 12px; } .top__nav a { font-size: .88rem; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }