/**
 * @file web/src/components/layout/Header.module.css
 * @description Layout refactor (M1): the left sidebar is gone, so the header
 * is now the only navigation rail. It hosts the brand mark, primary nav
 * buttons, search, and right-side actions (⌘K, AI Latency, theme, export).
 *
 * 📖 The model table underneath is 100% of the viewport width — the header
 * uses the same width, and nav items can collapse into a kebab at narrow widths.
 */

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h, 60px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  gap: 16px;
  background: var(--color-bg-card);
  backdrop-filter: blur(20px) saturate(1.5);
  -webkit-backdrop-filter: blur(20px) saturate(1.5);
  border-bottom: 1px solid var(--color-border);
  width: 100%;
}

.left {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

.center {
  flex: 1;
  max-width: 480px;
  min-width: 0;
}

.right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* ─── Brand ─── */
.logo { display: flex; align-items: center; gap: 8px; }
.logoIconSvg {
  color: var(--color-brand);
  display: flex;
  align-items: center;
  flex-shrink: 0;
}
.logoText {
  font-size: 16px; font-weight: 750;
  font-family: var(--font-mono);
  color: var(--color-text);
  display: flex;
  align-items: center;
  letter-spacing: -0.2px;
}
.logoTextHighlight { color: var(--color-brand); }
.version {
  font-size: 12px; font-weight: 500; font-family: var(--font-mono);
  color: var(--color-text-muted); background: var(--color-surface);
  padding: 2px 6px; border-radius: 999px; border: 1px solid var(--color-border);
}

/* ─── Primary nav (replaces the sidebar) ─── */
.nav {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: 8px;
  padding-left: 12px;
  border-left: 1px solid var(--color-border);
  height: 36px;
}

.navBtn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 30px;
  padding: 0 12px;
  font-size: 13px;
  font-weight: 600;
  font-family: var(--font-mono); /* Monospace font looks extremely high-tech */
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  cursor: pointer;
  transition: all 150ms var(--ease-out);
  white-space: nowrap;
}
.navBtn:hover {
  background: var(--color-bg-hover);
  color: var(--color-text);
  border-color: var(--color-border-hover);
}
.navBtnActive {
  background: var(--color-accent);
  color: var(--color-bg);
  border-color: var(--color-accent);
  font-weight: 800;
  box-shadow: 0 0 12px var(--color-accent-glow);
}
.navBtnActive:hover {
  background: var(--color-accent-hover);
  color: var(--color-bg);
  border-color: var(--color-accent-hover);
}

/* 📖 "Coming in M2" badge — small inline label that shows the menu structure
   📖 is honest even before those milestones land. */
.comingBadge {
  font-size: 10px;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--color-text-dim);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 1px 4px;
  border-radius: 3px;
  margin-left: 2px;
  line-height: 1;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

/* ─── Overflow menu (kebab) ─── */
.menuWrap { position: relative; }
.menuTrigger {
  width: 30px;
  padding: 0;
  justify-content: center;
}
.menuPopover {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 200px;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 4px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.32);
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.menuItem {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 7px 10px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  background: transparent;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  text-align: left;
  transition: background 100ms;
}
.menuItem:hover { background: var(--color-bg-hover); }
.menuItemActive {
  background: var(--color-accent-dim) !important;
  color: var(--color-accent) !important;
  font-weight: 700;
}
.menuItem > span:first-of-type { flex: 1; }

/* ─── Search ─── */
.searchBar {
  display: flex; align-items: center; gap: 8px;
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: 8px; padding: 0 12px; height: 34px;
  transition: border-color 150ms, box-shadow 150ms;
}
.searchBar:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}
.searchIcon { font-size: 16px; flex-shrink: 0; }
.searchInput {
  flex: 1; background: none; border: none; outline: none;
  color: var(--color-text); font-size: 15px; font-family: var(--font-sans);
  min-width: 0;
}
.searchInput::placeholder { color: var(--color-text-dim); }

/* ─── Right-side buttons ─── */
.iconBtn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 6px 8px; border: 1px solid var(--color-border); border-radius: 6px;
  background: var(--color-surface); color: var(--color-text);
  cursor: pointer; font-size: 18px; transition: all 150ms;
}
.iconBtn:hover { background: var(--color-bg-hover); border-color: var(--color-border-hover); }

/* 📖 ⌘K button — the only global keyboard shortcut in the Web UI.
   📖 Tinted accent so users can spot it instantly. */
.cmdkBtn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 0 10px; height: 30px;
  border: 1px solid var(--color-border); border-radius: 6px;
  background: var(--color-surface); color: var(--color-text);
  cursor: pointer; font-size: 14px; font-weight: 600;
  font-family: var(--font-mono);
  transition: all 150ms;
}
.cmdkBtn:hover {
  border-color: var(--color-accent);
  background: var(--color-bg-hover);
}
.cmdkLabel { font-size: 13px; letter-spacing: 0.5px; }

/* ─── AI Latency benchmark button (reused from before) ─── */
.benchmarkBtn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 0 12px; height: 30px; font-size: 14px; font-weight: 700;
  border: 1px solid var(--color-border); border-radius: 6px;
  background: var(--color-surface); color: var(--color-text);
  cursor: pointer; font-family: var(--font-mono); transition: all 150ms;
}
.benchmarkBtn:hover {
  border-color: #00ff88; color: #00ff88; background: rgba(0, 255, 136, 0.08);
}
.benchmarkActive {
  border-color: #00ff88 !important; color: #00ff88 !important;
  background: rgba(0, 255, 136, 0.12) !important;
  cursor: not-allowed;
}
.benchmarkRunning { display: inline-flex; align-items: center; gap: 6px; }
@keyframes spin { to { transform: rotate(360deg); } }
.spinner {
  display: inline-block; width: 10px; height: 10px;
  border: 2px solid rgba(0, 255, 136, 0.3); border-top-color: #00ff88;
  border-radius: 50%; animation: spin 0.8s linear infinite; flex-shrink: 0;
}

/* 📖 Light theme: deep green for the benchmark button outline/hover and
   📖 the spinner ring so they stay visible on the white header bar. */
:global([data-theme="light"]) .benchmarkBtn:hover {
  border-color: #008f4d; color: #008f4d; background: rgba(0, 143, 77, 0.06);
}
:global([data-theme="light"]) .benchmarkActive {
  border-color: #008f4d !important; color: #008f4d !important;
  background: rgba(0, 143, 77, 0.10) !important;
}
:global([data-theme="light"]) .spinner {
  border-color: rgba(0, 0, 0, 0.1);
  border-top-color: #008f4d;
}

/* 📖 Responsive — at narrow widths the nav collapses into the kebab menu.
   📖 We never reintroduce a left sidebar. The table keeps 100% width. */
@media (max-width: 1024px) {
  .navBtn > span:not(.comingBadge) { display: none; }
  .navBtn { padding: 0 8px; }
  .center { max-width: 320px; }
}
@media (max-width: 768px) {
  .center { display: none; }
  .logoText { display: none; }
  .cmdkLabel { display: none; }
  .benchmarkBtn > span:not(.benchmarkRunning) { display: none; }
  .nav { display: none; }
  .hamburgerBtn { display: flex; }
}
@media (max-width: 560px) {
  .version { display: none; }
}

/* ─── Hamburger + mobile nav (M5) ─── */
.hamburgerBtn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  cursor: pointer;
  margin-left: 8px;
  &:hover { color: var(--color-text); background: var(--color-bg-hover); }
}

.mobileNav {
  position: absolute;
  top: var(--header-h, 60px);
  left: 0;
  right: 0;
  background: var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-border);
  padding: 8px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  z-index: 150;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.mobileNavItem {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-muted);
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-align: left;
  width: 100%;
  &:hover { background: var(--color-bg-hover); color: var(--color-text); }
}

.mobileNavActive {
  color: var(--color-accent);
  background: var(--color-accent-dim);
}

.mobileNavDivider {
  height: 1px;
  background: var(--color-border);
  margin: 6px 0;
}

/* ─── Keyboard Focus & Micro-interaction Active States ─── */
.navBtn:focus-visible,
.iconBtn:focus-visible,
.cmdkBtn:focus-visible,
.benchmarkBtn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.navBtn:active,
.iconBtn:active,
.cmdkBtn:active,
.benchmarkBtn:active {
  transform: scale(0.96);
}