:root {
  --navy: #071b2e;
  --sky: #2b9fe8;
  --text: #f4faff;
  --muted: rgba(232, 246, 255, 0.7);
  --card: rgba(255, 255, 255, 0.08);
  --border: rgba(255, 255, 255, 0.12);
  --rail-w: 68px;
  --rail-w-open: 228px;
  --header-h: 56px;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color: var(--text);
  line-height: 1.5;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  padding-top: var(--header-h);
  padding-left: var(--rail-w);
  background: linear-gradient(165deg, #04101c 0%, #0a2744 45%, #0e4a78 100%);
}
html.rail-pinned body {
  padding-left: var(--rail-w-open);
}

/* ——— Fixed top header (never collapses with rail) ——— */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  z-index: 60;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px 0 20px;
  background: rgba(3, 12, 24, 0.94);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
}
.site-header-brand {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  color: #f4faff;
  text-decoration: none;
}
.site-header-brand:hover { color: #fff; }
.site-header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}
.site-header-actions a {
  color: #9fd4ff;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 8px 14px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.14);
}
.site-header-actions a.primary {
  background: var(--sky);
  border-color: transparent;
  color: #fff;
}
.site-header-actions a:hover {
  background: rgba(255, 255, 255, 0.08);
}
.site-header-actions a.primary:hover {
  filter: brightness(1.08);
  background: var(--sky);
}

/* ——— Left rail ——— */
#site-rail {
  position: fixed;
  top: var(--header-h);
  left: 0;
  bottom: 0;
  z-index: 50;
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  background: rgba(3, 12, 24, 0.94);
  border-right: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
  transition: width 0.18s ease;
  overflow: hidden;
}
#site-rail:hover,
#site-rail.is-pinned,
#site-rail.is-mobile-open {
  width: var(--rail-w-open);
}
#site-rail:hover .rail-label,
#site-rail.is-pinned .rail-label,
#site-rail.is-mobile-open .rail-label {
  opacity: 1;
  width: auto;
}
.rail-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 8px;
  flex: 1;
  overflow-y: auto;
}
.rail-list a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 12px;
  color: rgba(232, 246, 255, 0.75);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  margin: 0;
  white-space: nowrap;
  border: 1px solid transparent;
}
.rail-list a:hover {
  background: rgba(255, 255, 255, 0.06);
  color: #f4faff;
}
.rail-list a.is-active {
  background: rgba(43, 159, 232, 0.16);
  border-color: rgba(43, 159, 232, 0.35);
  color: #e8f6ff;
}
.rail-ico {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: inherit;
}
.rail-ico svg {
  width: 20px;
  height: 20px;
}
.rail-label {
  opacity: 0;
  width: 0;
  overflow: hidden;
}
.rail-foot {
  padding: 8px 8px 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
}
/* Pin: plain icon, left-aligned with rail icons (no pill/box) */
button#site-rail-pin {
  box-sizing: border-box;
  width: 48px;
  min-width: 48px;
  max-width: 48px;
  height: 44px;
  margin: 0;
  padding: 10px 12px;
  border: 0 !important;
  border-radius: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
  color: rgba(232, 246, 255, 0.65);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  flex-shrink: 0;
  font-size: inherit;
  font-weight: inherit;
  line-height: 1;
}
button#site-rail-pin:hover,
button#site-rail-pin[aria-pressed='true'] {
  color: #9fd4ff;
  background: transparent !important;
  border: 0 !important;
}
button#site-rail-pin:focus {
  outline: none;
}
button#site-rail-pin:focus-visible {
  color: #9fd4ff;
  outline: 1px solid rgba(43, 159, 232, 0.55);
  outline-offset: 2px;
  border-radius: 8px;
}
button#site-rail-pin i {
  font-size: 1.15rem;
  line-height: 1;
  width: 24px;
  text-align: center;
}

#site-rail-menu {
  display: none;
  position: fixed;
  top: 10px;
  left: 12px;
  z-index: 70;
  width: 40px;
  height: 36px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(3, 12, 24, 0.9);
  color: #9fd4ff;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  padding: 0;
}
#site-rail-scrim {
  position: fixed;
  inset: 0;
  top: var(--header-h);
  z-index: 40;
  background: rgba(0, 0, 0, 0.45);
  border: none;
  padding: 0;
  width: 100%;
  cursor: pointer;
}

@media (max-width: 799px) {
  body {
    padding-left: 0 !important;
  }
  .site-header {
    padding-left: 56px;
  }
  #site-rail {
    transform: translateX(-100%);
    width: var(--rail-w-open) !important;
  }
  #site-rail.is-mobile-open {
    transform: translateX(0);
  }
  #site-rail.is-mobile-open .rail-label {
    opacity: 1;
    width: auto;
  }
  #site-rail-menu {
    display: inline-flex;
  }
}
@media (min-width: 800px) {
  #site-rail-menu,
  #site-rail-scrim[hidden] {
    display: none !important;
  }
  #site-rail-scrim:not([hidden]) {
    display: none !important;
  }
}

/* ——— Content ——— */
.wrap { max-width: 880px; margin: 0 auto; padding: 40px 20px 80px; }
.kicker {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 12px;
  color: rgba(232, 246, 255, 0.5);
  margin: 0 0 8px;
}
h1 { font-size: clamp(1.8rem, 4vw, 2.5rem); margin: 0 0 12px; letter-spacing: -0.02em; }
h2 { font-size: 1.2rem; margin: 0 0 8px; }
.lead { color: var(--muted); font-size: 1.1rem; margin: 0 0 28px; max-width: 36em; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 22px 24px;
  margin-bottom: 16px;
  backdrop-filter: blur(8px);
}
.grid { display: grid; gap: 16px; }
@media (min-width: 700px) {
  .grid-2 { grid-template-columns: 1fr 1fr; }
}
a.btn {
  display: inline-block;
  padding: 14px 20px;
  border-radius: 12px;
  background: var(--sky);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  margin-right: 10px;
  margin-bottom: 8px;
}
a.btn.ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: #9fd4ff;
}
.brand {
  display: flex;
  justify-content: center;
  margin-bottom: 12px;
}
.brand a {
  display: block;
  line-height: 0;
}
.brand-logo {
  width: min(720px, 92vw);
  height: auto;
  object-fit: contain;
  display: block;
  filter: drop-shadow(0 8px 28px rgba(0, 0, 0, 0.35));
}
@media (min-width: 700px) {
  .brand-logo { width: min(820px, 88vw); }
}
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 8px;
}
.cta-hint {
  color: var(--muted);
  font-size: 0.92rem;
  margin: 0 0 8px;
  max-width: 36em;
}
ul.clean { color: var(--muted); padding-left: 1.2em; }
footer {
  margin-top: 48px;
  font-size: 0.85rem;
  color: rgba(232, 246, 255, 0.45);
}
footer a { color: #9fd4ff; }