/* ============================================
   THE FALSE POSITIVE — Shared Layout
   Nav, Footer, Ink Overlay, Search Modal
   ============================================ */



/* ── Top Navigation ────────────────────────── */
#topnav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: rgba(26, 29, 26, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  display: flex;
  align-items: center;
  padding: 0 var(--space-xl);
  gap: var(--space-md);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}

.nav-brand-name {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--off-white);
  letter-spacing: 0.08em;
  transition: color var(--transition-fast);
  white-space: nowrap;
}
.nav-brand:hover .nav-brand-name { color: var(--white); }

.nav-spacer { flex: 1; }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links li {
  display: flex;
  align-items: center;
}

.nav-links a {
  font-family: var(--font-heading);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  transition: color var(--transition-fast);
  padding: 0.25rem 0;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0; right: 0;
  height: 1px;
  background: var(--red);
  transform: scaleX(0);
  transition: transform var(--transition-mid);
  transform-origin: left;
}

.nav-links a:hover,
.nav-links a.active { color: var(--white); }
.nav-links a:hover::after,
.nav-links a.active::after { transform: scaleX(1); }

/* Search button */
.nav-search-btn {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.35rem 0.75rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.nav-search-btn:hover {
  border-color: var(--border-red);
  color: var(--off-white);
  background: var(--bg-hover);
}

.nav-search-btn .shortcut {
  font-size: 0.65rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-light);
  border-radius: 3px;
  padding: 0.1em 0.4em;
  color: var(--muted);
}

/* GitHub icon */
.nav-icon-link {
  display: flex;
  align-items: center;
  color: var(--muted);
  transition: color var(--transition-fast);
}
.nav-icon-link:hover { color: var(--white); }
.nav-icon-link svg { width: 20px; height: 20px; }

/* Mobile hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
  padding: 4px;
  background: transparent;
  border: none;
}
.nav-hamburger span {
  width: 22px; height: 2px;
  background: var(--muted);
  border-radius: 1px;
  transition: all var(--transition-mid);
}

/* ── Search Modal ──────────────────────────── */
#search-modal {
  position: fixed;
  inset: 0;
  z-index: 9000;
  background: rgba(0,0,0,0.75);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 10vh;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-mid);
}

#search-modal.open {
  opacity: 1;
  pointer-events: all;
}

.search-box {
  background: var(--bg-elevated);
  border: 1px solid var(--border-red);
  border-radius: 6px;
  width: min(560px, 90vw);
  box-shadow: var(--shadow-panel), 0 0 40px var(--red-glow-soft);
  overflow: hidden;
  transform: translateY(-10px);
  transition: transform var(--transition-mid);
}
#search-modal.open .search-box { transform: translateY(0); }

.search-input-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--border);
}

.search-input-wrap svg { color: var(--muted); flex-shrink: 0; }

#search-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--off-white);
  font-family: var(--font-mono);
  font-size: 1rem;
  caret-color: var(--red);
}

#search-input::placeholder { color: var(--muted); }

#search-results {
  max-height: 360px;
  overflow-y: auto;
  padding: var(--space-sm) 0;
}

.search-result-item {
  display: flex;
  flex-direction: column;
  padding: 0.6rem var(--space-lg);
  cursor: pointer;
  transition: background var(--transition-fast);
  border-left: 2px solid transparent;
}
.search-result-item:hover, .search-result-item.active {
  background: var(--red-ghost);
  border-left-color: var(--red);
}
.search-result-item .result-title {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  color: var(--off-white);
}
.search-result-item .result-section {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  margin-top: 2px;
}

.search-empty {
  padding: var(--space-xl) var(--space-lg);
  text-align: center;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.search-footer {
  padding: 0.6rem var(--space-lg);
  border-top: 1px solid var(--border);
  display: flex;
  gap: var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted);
}

/* ── Footer ──────────────────────────── */
#site-footer {
  border-top: 1px solid rgba(225, 233, 232, 0.06);
  padding: var(--space-md) var(--space-xl);
  text-align: center;
}

.footer-l-mark { display: none; }

.footer-text {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--muted);
  letter-spacing: 0.1em;
  opacity: 0.6;
}

.footer-text span { color: inherit; }

/* ── Page Wrapper ──────────────────────────── */
.page-wrapper {
  padding-top: var(--nav-height);
  min-height: 100vh;
}

/* ── Responsive ────────────────────────────── */
@media (max-width: 768px) {
  #topnav { padding: 0 var(--space-md); gap: var(--space-sm); }
  
  .nav-brand-name { font-size: 0.75rem; white-space: normal; line-height: 1.2; }
  .search-text { display: none; }
  
  .nav-links {
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-md) var(--space-xl);
    gap: var(--space-md);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s ease, opacity 0.3s ease;
    z-index: -1;
  }
  
  .nav-links.mobile-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-hamburger { display: flex; }
  
  /* Hamburger Animation */
  .nav-hamburger[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }
  .nav-hamburger[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
  }
  .nav-hamburger[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }

  .nav-search-btn .shortcut { display: none; }
}

/* ── Search Modal ────────────────────────────── */
#search-modal {
  position: fixed;
  inset: 0;
  background: rgba(10, 12, 10, 0.85);
  backdrop-filter: blur(8px);
  z-index: 9999;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 15vh;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s;
}

#search-modal.open {
  opacity: 1;
  visibility: visible;
}

.search-box {
  width: 100%;
  max-width: 600px;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: translateY(-20px);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

#search-modal.open .search-box {
  transform: translateY(0);
}

.search-input-wrap {
  display: flex;
  align-items: center;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  gap: 1rem;
  color: var(--muted);
}

#search-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--white);
  font-family: var(--font-mono, monospace);
  font-size: 1.1rem;
}

#search-input::placeholder {
  color: var(--muted);
}

#search-results {
  max-height: 400px;
  overflow-y: auto;
  padding: 1rem;
}

.search-empty {
  padding: 2rem;
  text-align: center;
  color: var(--muted);
  font-family: var(--font-mono, monospace);
  font-size: 0.9rem;
}

.search-result-item {
  display: flex;
  flex-direction: column;
  padding: 0.75rem 1rem;
  border-radius: 4px;
  color: var(--white);
  text-decoration: none;
  margin-bottom: 0.25rem;
  border-left: 2px solid transparent;
}

.search-result-item:hover,
.search-result-item:focus {
  background: var(--red-ghost);
  border-left-color: var(--red-bright);
  outline: none;
}

.result-title {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.result-section {
  font-family: var(--font-mono, monospace);
  font-size: 0.75rem;
  color: var(--silver);
}

.search-footer {
  padding: 0.75rem 1.5rem;
  background: rgba(0, 0, 0, 0.2);
  border-top: 1px solid var(--border);
  display: flex;
  gap: 1.5rem;
  font-family: var(--font-mono, monospace);
  font-size: 0.75rem;
  color: var(--muted);
}