/* =====================================================================
   05. header.css — qorongʻi panel (tile-1 #272729), footer bilan bir xil.
   design.md: global-nav qora + blur; interaktiv rang qorongʻida =
   primary-on-dark. Oʻngda «Kirish».
   ===================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: rgba(39, 39, 41, .9);          /* tile-1 + blur */
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  color: var(--body-on-dark);
}
.site-header.is-scrolled { background: rgba(39, 39, 41, .97); }

.header-inner {
  display: flex;
  align-items: center;
  gap: var(--sp-5);
  min-height: var(--header-h);
}

/* ---------- Logotip ---------- */
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-mark {
  width: 34px;
  height: 34px;
  border-radius: var(--r-sm);
  display: grid;
  place-items: center;
  color: var(--on-primary);
  background: var(--primary);
}
.logo-text {
  font-size: var(--fs-lg);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1;
  display: flex;
  align-items: baseline;
  gap: 0.3em;
}
.site-header .logo-text strong { color: var(--body-on-dark); }
.site-header .logo-text span   { color: var(--primary-on-dark); }

/* ---------- Asosiy menyu ---------- */
.main-nav { margin-inline-start: auto; }
.main-nav ul { display: flex; align-items: center; gap: 2px; }
.main-nav a {
  display: block;
  font-size: var(--fs-sm);
  font-weight: 400;
  letter-spacing: -0.016em;
  color: var(--body-muted-dark);
  padding: 8px 10px;
  border-radius: var(--r-sm);
  white-space: nowrap;
  transition: color var(--t-fast), background var(--t-fast);
}
.main-nav a:hover { color: var(--body-on-dark); background: rgba(255, 255, 255, .08); }
.main-nav a.is-active { color: var(--primary-on-dark); font-weight: 600; }

/* ---------- Harakatlar ---------- */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  flex-shrink: 0;
}

/* Qorongʻi panelda «Kirish» — oq utility tugma */
.site-header .btn-dark {
  background: var(--canvas);
  color: var(--ink);
}
.site-header .btn-dark:hover { background: var(--parchment); }

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--r-sm);
  border: 1px solid rgba(255, 255, 255, .22);
  background: transparent;
  color: var(--body-on-dark);
  place-items: center;
}
.nav-toggle:hover { background: rgba(255, 255, 255, .08); }
.nav-toggle-close { display: none; }
.nav-toggle[aria-expanded="true"] .nav-toggle-open  { display: none; }
.nav-toggle[aria-expanded="true"] .nav-toggle-close { display: block; }

/* =====================================================================
   Mobil menyu
   ===================================================================== */

@media (max-width: 1100px) {
  .main-nav a { padding: 8px 7px; }
}

@media (max-width: 940px) {
  .nav-toggle { display: grid; }

  .main-nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    margin: 0;
    background: rgba(39, 39, 41, .97);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, .08);
    padding: var(--sp-3) var(--gutter) var(--sp-5);
    display: grid;
    max-height: calc(100dvh - var(--header-h));
    overflow-y: auto;

    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity var(--t-base), transform var(--t-base), visibility var(--t-base);
  }
  .main-nav.is-open { opacity: 1; visibility: visible; transform: none; }

  .main-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    max-width: var(--container);
    margin-inline: auto;
    width: 100%;
  }
  .main-nav a {
    font-size: var(--fs-md);
    color: var(--body-on-dark);
    padding: 12px 14px;
    border-radius: var(--r-md);
    min-height: 44px;
  }
  .main-nav a.is-active { background: rgba(255, 255, 255, .1); color: var(--primary-on-dark); }

  body.nav-open { overflow: hidden; }
}