/* header — mast */
.mast {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--paper);
  border-bottom: 1px solid var(--line-soft);
}
.mast-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 0 20px;
  max-width: var(--container);
  margin: 0 auto;
}
@media (min-width: 768px) {
  .mast-inner { padding: 0 32px; min-height: 84px; }
}

.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.site-logo-dot {
  width: 10px;
  height: 10px;
  background: var(--chroma);
  border-radius: 50%;
  box-shadow: 0 0 0 2px rgba(47, 158, 68, 0.18);
}
.site-logo-tag {
  display: inline-block;
  font-size: 0.7rem;
  color: var(--blue-deep);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.mast-nav {
  display: none;
}
@media (min-width: 1024px) {
  .mast-nav {
    display: flex;
    align-items: center;
    gap: 28px;
  }
}
.mast-nav-link {
  font-size: 0.94rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 500;
  padding: 6px 0;
  position: relative;
}
.mast-nav-link:hover { color: var(--blue-deep); }
.mast-nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  bottom: -4px;
  height: 2px;
  background: var(--chroma);
}

.mast-cta {
  display: none;
}
@media (min-width: 1024px) {
  .mast-cta { display: inline-block; padding: 10px 18px; font-size: 0.9rem; min-height: 40px; }
}

.hamburger {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 48px;
  height: 48px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 4px;
  cursor: pointer;
}
@media (min-width: 1024px) {
  .hamburger { display: none; }
}
.hamburger-line {
  width: 22px;
  height: 2px;
  background: var(--ink);
  transition: transform var(--t-fast);
}
.hamburger[aria-expanded="true"] .hamburger-line:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger[aria-expanded="true"] .hamburger-line:nth-child(2) { opacity: 0; }
.hamburger[aria-expanded="true"] .hamburger-line:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mast-drawer {
  position: fixed;
  inset: 0;
  z-index: 300;
  background: var(--ink);
  color: var(--paper);
  padding: 88px 24px 32px;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform var(--t-base);
}
.mast-drawer[data-open="true"] {
  transform: translateX(0);
}
@media (min-width: 1024px) { .mast-drawer { display: none; } }

.mast-drawer-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.mast-drawer-link {
  display: block;
  padding: 14px 8px;
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.2rem;
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid rgba(245, 247, 250, 0.08);
}
.mast-drawer-link:hover { color: var(--chroma); }

.mast-drawer-foot {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid rgba(245, 247, 250, 0.12);
  font-size: 0.92rem;
  color: var(--slate);
}
.mast-drawer-foot a { color: var(--paper); display: block; padding: 6px 0; }