:root {
  --bg: #0b0c10;
  --panel: #111218;
  --text: #f3f5f7;
  --muted: #c7cbd1;
  --accent: #4fd1c5;
  --maxw: 1100px;
  --frame: #222634;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  color: var(--text);
  background: var(--bg);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell,
    Noto Sans, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.5;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 8px;
}

a {
  color: var(--text);
  text-decoration: none;
}
a:hover {
  opacity: 0.9;
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 16px;
}

.section {
  padding: 56px 0;
}

.skip {
  position: absolute;
  left: -9999px;
  top: -9999px;
}
.skip:focus {
  left: 16px;
  top: 16px;
  background: var(--accent);
  color: #000;
  padding: 8px 12px;
  border-radius: 6px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 12, 16, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #1a1c26;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}
.logo {
  background: var(--accent);
  color: #000;
  padding: 6px 8px;
  border-radius: 6px;
  font-weight: 800;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 16px;
}
.site-nav a {
  padding: 8px 10px;
  border-radius: 6px;
}
.btn {
  background: var(--accent);
  color: #000;
  padding: 10px 14px;
  border-radius: 8px;
  font-weight: 700;
  display: inline-block;
}
.btn.alt {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
}
.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid #2a2e39;
  color: var(--text);
  border-radius: 8px;
  padding: 8px 12px;
}

.hero {
  padding: 56px 0 36px;
  background: linear-gradient(180deg, #0b0c10, #0f1116);
}
.hero-inner {
  text-align: center;
}
.hero h1 {
  margin: 0 0 12px;
  font-size: 28px;
}
.tag {
  color: var(--muted);
  margin: 0 0 16px;
}
.hero-photo {
  width: 100%;
  max-width: 940px;
  margin: 0 auto 16px;
  padding: 10px;
  background: var(--frame);
  border-radius: 14px;
  border: 1px solid #1a1c26;
}
.hero-photo img {
  width: 100%;
  height: auto;
  border-radius: 10px;
}

.cta {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.sub {
  color: var(--muted);
  margin-top: -4px;
  margin-bottom: 16px;
}

.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
figure {
  margin: 0;
}
figure.vertical img {
  border-radius: 10px;
}

figcaption {
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
}

.pairs {
  display: grid;
  gap: 16px;
}
.pair {
  display: grid;
  gap: 12px;
}

.quote {
  font-size: 20px;
  background: var(--panel);
  padding: 20px;
  border-radius: 10px;
  border: 1px solid #1a1c26;
}
.cite {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
.bullets {
  list-style: disc;
  padding-left: 18px;
}
.numbers {
  background: var(--panel);
  border: 1px solid #1a1c26;
  border-radius: 10px;
  padding: 16px;
}
.numbers h3 {
  margin-top: 0;
}

.contact-card {
  background: var(--panel);
  border: 1px solid #1a1c26;
  border-radius: 10px;
  padding: 20px;
}
.contact-list {
  list-style: none;
  padding: 0;
  margin: 8px 0 0;
}
.contact-list li {
  margin: 6px 0;
}

.site-footer {
  padding: 32px 0 40px;
  color: var(--muted);
  border-top: 1px solid #1a1c26;
  text-align: center;
}

/* responsive */
@media (min-width: 720px) {
  .grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pairs {
    grid-template-columns: repeat(2, 1fr);
  }
  .pair {
    grid-template-columns: repeat(2, 1fr);
  }
  .about-grid {
    grid-template-columns: 2fr 1fr;
  }
  .hero h1 {
    font-size: 34px;
  }
}

@media (max-width: 960px) {
  .nav-toggle {
    display: inline-block;
  }
  .site-nav {
    position: absolute;
    top: 56px;
    right: 16px;
    background: var(--panel);
    border: 1px solid #1a1c26;
    border-radius: 10px;
    padding: 12px;
    display: none;
    flex-direction: column;
    gap: 8px;
  }
  .site-nav.open {
    display: flex;
  }
}