:root {
  --bg: #0f0f12;
  --card: #15161a;
  --text: #e9eaee;
  --muted: #a6a8b1;
  --accent: #6ea8fe;
  --accent-2: #9b7bff;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: radial-gradient(1200px 800px at 10% -10%, rgba(110,168,254,0.15), transparent),
              radial-gradient(800px 600px at 90% 10%, rgba(155,123,255,0.12), transparent),
              var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica Neue, Arial, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", sans-serif;
  line-height: 1.6;
}

.container {
  width: min(1100px, 92vw);
  margin: 0 auto;
  padding: 0 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(15,15,18,0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: 0.2px;
}

.logo {
  width: 36px;
  height: 36px;
  display: block;
  filter: drop-shadow(0 2px 8px rgba(0,0,0,0.35));
}

nav a {
  color: var(--text);
  text-decoration: none;
  margin-left: 18px;
  font-weight: 500;
  opacity: 0.9;
}
nav a:hover { opacity: 1; color: var(--accent); }

.hero {
  padding: 80px 0 40px 0;
}

h1 {
  font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1.15;
  margin: 0 0 14px 0;
}

.lead {
  font-size: clamp(16px, 2vw, 20px);
  color: var(--muted);
  max-width: 900px;
}

.about, .contacts {
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0));
  padding: 40px 0;
  border-top: 1px solid rgba(255,255,255,0.06);
}

h2 {
  font-size: clamp(22px, 2.4vw, 28px);
  margin: 0 0 14px 0;
}

.contacts-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.contacts-list li { margin: 6px 0; }
.contacts a { color: var(--accent); }

.site-footer {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 18px 0 30px;
  display: flex;
  align-items: center;
}

.site-footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.back-to-top {
  color: var(--accent-2);
  text-decoration: none;
  font-weight: 600;
}

.made-on {
  color: var(--muted);
  font-size: 14px;
}