/* ── HEADER ── */
.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(17,26,20,.92);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background .25s;
}
html:not(.dark) .site-header { background: rgba(250,252,247,.92); }

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.logo-dark, .logo-light { height: 38px; width: auto; display: block; }
html.dark .logo-light { display: none; }
html:not(.dark) .logo-dark { display: none; }

.header-right { display: flex; align-items: center; gap: 6px; }

.header-nav { display: flex; gap: 2px; align-items: center; }
.header-nav a {
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  padding: 7px 12px;
  border-radius: 999px;
  transition: background .15s, color .15s;
}
.header-nav a:hover { background: var(--card); color: var(--text); }
.nav-cta { background: var(--green); color: #fff !important; font-weight: 600 !important; }
.nav-cta:hover { background: var(--green-dark) !important; }

.theme-toggle {
  height: 34px;
  padding: 0 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--muted);
  cursor: pointer;
  font-size: 13px;
  font-family: var(--sans);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: color .15s, border-color .15s, background .15s;
}
.theme-toggle:hover { color: var(--text); border-color: var(--green-mid); }
html.dark .t-light { display: none; }
html:not(.dark) .t-dark { display: none; }

/* ── BURGER ── */
.burger-btn {
  display: none;
  height: 34px;
  width: 34px;
  border-radius: 50%;
  border: 1.5px solid var(--line);
  background: var(--card);
  color: var(--muted);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  transition: color .15s, border-color .15s;
  flex-shrink: 0;
}
.burger-btn:hover { color: var(--text); border-color: var(--green-mid); }
.burger-btn.active { border-color: var(--green); color: var(--green); background: var(--accent); }

.burger-line {
  display: block;
  width: 14px;
  height: 1.5px;
  background: currentColor;
  border-radius: 2px;
  transition: transform .2s, opacity .2s;
}
.burger-btn.active .burger-line:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.burger-btn.active .burger-line:nth-child(2) { opacity: 0; }
.burger-btn.active .burger-line:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

/* ── MOBILE NAV DRAWER ── */
.mobile-nav {
  display: none;
  position: fixed;
  top: 67px;
  left: 0;
  right: 0;
  background: var(--card);
  border-bottom: 1px solid var(--line);
  z-index: 99;
  padding: 8px 0 12px;
  box-shadow: 0 8px 24px rgba(0,0,0,.15);
  animation: slideDown .18s ease;
}
.mobile-nav.open { display: block; }

.mobile-nav a {
  display: block;
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  border-bottom: 1px solid var(--line);
  transition: background .15s, color .15s;
}
.mobile-nav a:last-child { border-bottom: none; }
.mobile-nav a:hover { background: var(--accent); color: var(--green); }
.mobile-nav .nav-cta-mob {
  margin: 10px 20px 2px;
  display: block;
  text-align: center;
  background: var(--green);
  color: #fff !important;
  border-radius: 10px;
  padding: 12px 20px;
  font-weight: 600;
  border-bottom: none !important;
}
.mobile-nav .nav-cta-mob:hover { background: var(--green-dark) !important; }

@media (max-width: 640px) {
  .header-nav { display: none; }
  .burger-btn { display: inline-flex; }
}