/* ---------- sticky nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  background: rgba(10,11,13,.72);
  border-bottom: 1px solid var(--line);
  transition: background .3s, box-shadow .3s;
}
.site-header.sticky { background: rgba(10,11,13,.9); box-shadow: 0 4px 20px rgba(0,0,0,.35); }

.nav-in { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); }

.logo {
  font-family: var(--font-mono); font-weight: 600; letter-spacing: .04em;
  display: flex; align-items: center; gap: 9px; font-size: 15px; color: var(--text);
}
.logo .sq { width: 11px; height: 11px; background: var(--acc); box-shadow: 0 0 12px var(--acc); flex: none; }
.logo .prompt { color: var(--acc); font-size: 17px; line-height: 1; font-weight: 600; flex: none; text-shadow: 0 0 10px rgba(194,242,77,.5); }
.logo .ext { color: var(--faint); }
.logo img { max-height: 32px; width: auto; }

.menu { display: flex; gap: 30px; list-style: none; margin: 0; padding: 0; }
.menu a { font-size: 14px; color: var(--muted); transition: color .15s; }
.menu a:hover, .menu .current-menu-item > a { color: var(--text); }

.nav-right { display: flex; align-items: center; gap: 12px; }
.nav-cta {
  font-family: var(--font-mono); font-size: 13px; color: var(--fire-ink);
  background: var(--fire-grad); padding: 9px 16px; border-radius: 7px; font-weight: 600;
  transition: transform .15s, box-shadow .15s; white-space: nowrap;
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 8px 24px rgba(255,106,61,.32); }

/* search trigger */
.nav-search {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border: 1px solid var(--line); border-radius: 9px;
  background: transparent; color: var(--muted); cursor: pointer; transition: all .15s;
}
.nav-search:hover { color: var(--acc); border-color: var(--acc-line); }
.nav-search svg { width: 18px; height: 18px; }

/* fullscreen search overlay */
.search-overlay {
  position: fixed; inset: 0; z-index: 130; background: rgba(10,11,13,.86);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  opacity: 0; visibility: hidden; transition: opacity .2s;
  display: flex; align-items: flex-start; justify-content: center; padding: 18vh 24px 0;
}
.search-overlay.open { opacity: 1; visibility: visible; }
.search-overlay-in { width: min(680px, 100%); }
.search-overlay-form {
  display: flex; align-items: center; gap: 14px; background: var(--bg-1);
  border: 1px solid var(--acc-line); border-radius: 14px; padding: 6px 8px 6px 18px;
}
.search-overlay-form .ic { color: var(--acc); flex: none; display: inline-flex; }
.search-overlay-form .ic svg { width: 22px; height: 22px; }
.search-overlay-form input {
  flex: 1; min-width: 0; background: transparent; border: 0; outline: none;
  font-family: var(--font-sans); font-size: 18px; color: var(--text); padding: 14px 0;
}
.search-overlay-form input::placeholder { color: var(--faint); }
.search-overlay-form button {
  font-size: 14px; font-weight: 700; color: var(--fire-ink); background: var(--fire-grad);
  border: 0; padding: 12px 22px; border-radius: 9px; cursor: pointer; flex: none;
}
.search-overlay-close {
  margin: 20px auto 0; display: flex; align-items: center; gap: 7px;
  background: transparent; border: 0; color: var(--faint); cursor: pointer;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .08em;
}
.search-overlay-close:hover { color: var(--text); }
.search-overlay-close svg { width: 16px; height: 16px; }

/* burger (mobile) */
.burger {
  display: none; background: transparent; border: 1px solid var(--line);
  border-radius: 8px; width: 42px; height: 42px; cursor: pointer;
  align-items: center; justify-content: center; color: var(--text);
}
.burger svg { width: 20px; height: 20px; }

/* mobile slide-in panel */
.m-panel {
  position: fixed; top: 0; right: 0; bottom: 0; width: min(300px, 84vw);
  background: var(--bg-1); border-left: 1px solid var(--line); z-index: 120;
  transform: translateX(100%); transition: transform .3s cubic-bezier(.4,0,.2,1);
  display: flex; flex-direction: column; padding: 20px; overflow-y: auto;
}
.m-panel.open { transform: none; }
.m-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.55); z-index: 110;
  opacity: 0; visibility: hidden; transition: opacity .3s;
}
.m-overlay.open { opacity: 1; visibility: visible; }
.m-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; }
.m-close { background: transparent; border: 0; color: var(--text); cursor: pointer; width: 40px; height: 40px; }
.m-close svg { width: 22px; height: 22px; }
.m-menu { list-style: none; margin: 0 0 24px; padding: 0; display: flex; flex-direction: column; }
.m-menu li { border-bottom: 1px solid var(--line-2); }
.m-menu a { display: block; padding: 14px 4px; font-size: 16px; color: var(--text); }
.m-panel .nav-cta { text-align: center; }
.m-search {
  display: flex; align-items: center; gap: 10px; width: 100%;
  background: var(--bg-2); border: 1px solid var(--line); border-radius: 9px;
  padding: 13px 14px; margin-bottom: 12px; color: var(--muted); cursor: pointer;
  font-family: var(--font-sans); font-size: 15px;
}
.m-search svg { width: 18px; height: 18px; }

@media (max-width: 920px) {
  .menu, .nav-right { display: none; }
  .burger { display: inline-flex; }
}