:root {
  --navy: #0b1f3a;
  --navy-2: #132a4a;
  --accent: #c6162d;
  --bg: #f3f5f8;
  --panel: #ffffff;
  --line: #d5dce6;
  --muted: #5b6573;
  --text: #1a1a1a;
  --side-w: 288px;
  --font: "DM Sans", system-ui, sans-serif;
  --display: "Instrument Serif", Georgia, serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  display: flex;
  min-height: 100vh;
}
a { color: inherit; }

.sidebar {
  width: var(--side-w);
  flex: 0 0 var(--side-w);
  background: linear-gradient(180deg, var(--navy) 0%, var(--navy-2) 100%);
  color: #e8eef7;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  border-right: 1px solid rgba(255,255,255,.08);
}
.brand { padding: 28px 22px 16px; }
.brand-kicker {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: #9fb0c8;
  font-weight: 600;
}
.brand h1 {
  margin: 0;
  font-family: var(--display);
  font-weight: 400;
  font-size: 34px;
  line-height: 1.05;
  color: #fff;
}
.brand-note {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.45;
  color: #a9b7cc;
}
.nav {
  flex: 1;
  overflow: auto;
  padding: 8px 10px 18px;
  scrollbar-width: thin;
}
.nav-item {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  text-decoration: none;
  padding: 10px 12px;
  border-radius: 10px;
  margin-bottom: 2px;
  color: #c5d0e0;
  transition: background .15s, color .15s;
}
.nav-item:hover { background: rgba(255,255,255,.06); color: #fff; }
.nav-item.is-active {
  background: rgba(198, 22, 45, .92);
  color: #fff;
  box-shadow: 0 8px 20px rgba(0,0,0,.18);
}
.nav-num {
  font-size: 11px;
  font-weight: 700;
  opacity: .7;
  min-width: 22px;
  padding-top: 2px;
}
.nav-label { font-size: 13.5px; line-height: 1.3; font-weight: 500; }
.side-foot {
  padding: 14px 22px 18px;
  border-top: 1px solid rgba(255,255,255,.08);
  font-size: 12px;
  color: #8fa0b8;
}
.side-foot a { text-decoration: none; }
.side-foot a:hover { color: #fff; }

.main {
  flex: 1;
  min-width: 0;
  height: 100vh;
  overflow: auto;
  padding: 28px 32px 48px;
}
.mobile-bar {
  display: none;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.mobile-bar button {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 8px;
  padding: 8px 12px;
  font: inherit;
  cursor: pointer;
}
.section { display: none; max-width: 1100px; }
.section.is-active { display: block; animation: in .25s ease; }
@keyframes in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}
.eyebrow {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
}
.section-head h2 {
  margin: 0 0 10px;
  font-family: var(--display);
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 400;
  color: var(--navy);
  line-height: 1.15;
}
.desc {
  margin: 0 0 22px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.55;
  color: var(--muted);
}
.shot {
  margin: 0;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 18px 40px rgba(11, 31, 58, .08);
}
.shot img {
  display: block;
  width: 100%;
  height: auto;
  vertical-align: top;
}

@media (max-width: 900px) {
  body { display: block; }
  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    transform: translateX(-105%);
    transition: transform .2s ease;
    z-index: 40;
    box-shadow: 12px 0 40px rgba(0,0,0,.25);
  }
  body.nav-open .sidebar { transform: none; }
  .main { height: auto; min-height: 100vh; padding: 16px; }
  .mobile-bar { display: flex; }
}