/* ============================================
   MVR Studios — Layout
   ============================================ */

html,
body {
  background-color: var(--color-bg);
  overflow-x: hidden;
}

/* Lock scroll when nav is open */
body.nav-open {
  overflow: hidden;
}

/* ---- Hamburger Toggle Button ---- */
.nav-toggle {
  position: fixed;
  top: var(--space-lg);
  right: var(--space-lg);
  z-index: var(--nav-toggle-z);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 48px;
  height: 48px;
  padding: 0;
}

/* ---- Backdrop Overlay ---- */
.nav-backdrop {
  position: fixed;
  inset: 0;
  z-index: var(--nav-backdrop-z);
  background: var(--color-backdrop);
  backdrop-filter: blur(var(--backdrop-blur));
  -webkit-backdrop-filter: blur(var(--backdrop-blur));
  opacity: 0;
  pointer-events: none;
  will-change: opacity;
}

.nav-backdrop.is-visible {
  pointer-events: auto;
}

/* ---- Navigation Panel ---- */
.nav-panel {
  position: fixed;
  top: 0;
  right: 0;
  width: var(--nav-panel-width);
  height: 100vh;
  height: 100dvh;
  z-index: var(--nav-z-index);
  background: var(--color-panel-bg);
  border-left: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  will-change: transform;
  overflow: hidden;
}

.nav-panel[hidden] {
  display: none;
}

.nav-panel.is-open {
  display: flex;
}

/* ---- Close Button ---- */
.nav-close {
  position: absolute;
  top: var(--space-lg);
  right: var(--space-lg);
  z-index: 10;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ---- Tab Bar ---- */
.nav-tabs {
  display: flex;
  gap: var(--space-xs);
  padding: var(--space-3xl) var(--space-2xl) var(--space-lg);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

/* ---- Tab Panels (scrollable content) ---- */
.nav-panel [role="tabpanel"] {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: var(--space-2xl);
  position: relative;
  scrollbar-width: thin;
  scrollbar-color: var(--color-text-muted) transparent;
}

.nav-panel [role="tabpanel"]::-webkit-scrollbar {
  width: 4px;
}

.nav-panel [role="tabpanel"]::-webkit-scrollbar-track {
  background: transparent;
}

.nav-panel [role="tabpanel"]::-webkit-scrollbar-thumb {
  background: var(--color-text-muted);
  border-radius: 2px;
}

.nav-panel [role="tabpanel"][hidden] {
  display: none;
}

/* ---- Preview Image Container ---- */
.preview-image {
  position: fixed;
  pointer-events: none;
  z-index: 10;
  width: clamp(200px, 20vw, 350px);
  height: clamp(250px, 25vw, 400px);
  overflow: hidden;
  border-radius: var(--radius-md);
  opacity: 0;
  will-change: transform, opacity;
}

.preview-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---- Main Content ---- */
main {
  min-height: 100vh;
}