/* ==========================================================================
   MOBILE NAV DRAWER
   ==========================================================================
   Standalone stylesheet for the header's hamburger toggle + off-canvas
   link drawer on small screens. Kept separate from mobile.css and every
   desktop stylesheet on purpose — this file only ever touches
   .nclg-nav-toggle / .nclg-nav-links / .nclg-nav-scrim, so nothing here
   can affect desktop layout or any other component.

   Loaded only at mobile widths via the <link media="(max-width: 768px)">
   attribute in each page's <head>.
   ========================================================================== */

.nclg-nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border: 0;
    border-radius: var(--radius-pill, 999px);
    background: transparent;
    color: var(--text);
    cursor: pointer;
    flex-direction: column;
    gap: 4px;
}
.nclg-nav-toggle:hover { background: var(--glass); }
.nclg-nav-toggle-bar {
    display: block;
    width: 20px;
    height: 2px;
    border-radius: 2px;
    background: var(--text2);
    transition: transform 0.2s var(--ease), opacity 0.2s var(--ease), background 0.2s var(--ease);
}
.nclg-nav-toggle[aria-expanded="true"] .nclg-nav-toggle-bar { background: var(--text); }
.nclg-nav-toggle[aria-expanded="true"] .nclg-nav-toggle-bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nclg-nav-toggle[aria-expanded="true"] .nclg-nav-toggle-bar:nth-child(2) { opacity: 0; }
.nclg-nav-toggle[aria-expanded="true"] .nclg-nav-toggle-bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* The links row becomes an off-canvas sidebar drawer. */
.nclg-nav-links {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 60;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    width: 240px;
    height: 100vh;
    margin: 0;
    padding: 84px 14px 20px;
    background: rgba(10, 7, 28, 0.97);
    backdrop-filter: var(--blur-md);
    border-left: 1px solid var(--border);
    box-shadow: -12px 0 40px rgba(0, 0, 0, 0.45);
    transform: translateX(100%);
    transition: transform 0.25s var(--ease);
}
.nclg-nav-links.is-open { transform: translateX(0); }

.nclg-nav-link {
    width: 100%;
    height: auto;
    justify-content: flex-start;
    gap: 12px;
    padding: 13px 14px;
    border-radius: var(--radius-md);
}
.nclg-nav-link::after {
    content: attr(aria-label);
    font-size: 14px;
    font-weight: 600;
    color: inherit;
}
.nclg-nav-link--text { justify-content: flex-start; }
.nclg-nav-link--text::after { content: none; }
.nclg-nav-label { display: inline; }

/* The Guide link is locked to a 48×48 icon-only square on desktop
   (shared.css, #guide-nav-btn.nclg-nav-link--text) so it matches the
   other circular nav buttons there. In the drawer every other link is
   a full-width row instead, so that lock has to be undone here or
   Guide sits as a small square while everything else stretches full width. */
#guide-nav-btn.nclg-nav-link--text {
    width: 100%;
    height: auto;
    padding: 13px 14px;
}

/* Dim + block the page behind the open drawer. */
.nclg-nav-scrim {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 50;
    background: rgba(3, 2, 10, 0.55);
}
.nclg-nav-scrim.is-open { display: block; }

body.nav-open { overflow: hidden; }

/* Extra-small phones: shrink the brand a touch further so the toggle
   button never crowds it. Mirrors the small-phone tier pattern used
   for the nav bar in the 1.html/1.css prototype. */
@media (max-width: 380px) {
    .nclg-nav { padding: 0 12px; }
    .nclg-nav-logo { width: 30px; height: 30px; }
    .nclg-nav-wordmark strong { font-size: 13px; letter-spacing: 0.02em; }
    .nclg-nav-logo2 { height: 28px; }
    .nclg-nav-links { width: 200px; }
}