/* nav.css — the new top bar + right drawer. New file; base.html loads it after base.css.
   Markup contract (see base.html):
   <header class="topbar"><div class="inner">
     <a class="brand" href="/"><svg class="brand-mark">…</svg><span class="brand-name">…</span></a>
     <div class="topbar-actions"><button class="icon-button theme-toggle">…</button><button class="icon-button menu-toggle">…</button></div>
   </div></header>
   <div class="drawer-backdrop"></div>
   <aside class="drawer" aria-hidden="true">
     <div class="drawer-head">…</div>
     <nav class="drawer-nav">
       <a class="drawer-link">Home</a>
       <div class="drawer-group"><h4>Games</h4>
         <details class="drawer-item" data-game="iidx"><summary><span class="dot"></span>IIDX<span class="chev"></span></summary><ul>…</ul></details>
       </div>
     </nav>
   </aside> */

.topbar {
  position: sticky; top: 0; z-index: 100;
  height: var(--topbar-height);
  background: var(--topbar-bg);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: var(--border-width) solid var(--border-color);
}
.topbar > .inner { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: var(--space-md); }
.topbar .brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text-primary); font-weight: 600; font-size: var(--font-size-base); letter-spacing: -0.005em; text-decoration: none; min-width: 0; }
.topbar .brand:hover { text-decoration: none; color: var(--text-primary); }
/* The network logo (static/brand/logo.svg, inlined in base.html). Wider than tall, so it is sized by height. */
.topbar .brand-mark { height: 22px; width: auto; flex-shrink: 0; display: block; }
.topbar .brand-name { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.topbar .brand-context { display: inline-flex; align-items: center; gap: 8px; color: var(--text-muted); font-weight: 400; }
.topbar .brand-context::before { content: '/'; color: var(--border-color-strong); }
.topbar .topbar-actions { display: flex; align-items: center; gap: 4px; }
.topbar .icon-button { background: transparent; border-color: transparent; color: var(--text-secondary); }
.topbar .icon-button:hover { background: var(--interactive-bg-hover); color: var(--text-primary); }
.topbar .icon-button svg { width: 18px; height: 18px; }
.theme-toggle .sun, .theme-toggle .moon { display: none; }
html:not([data-theme="dark"]) .theme-toggle .moon { display: block; }
html[data-theme="dark"] .theme-toggle .sun { display: block; }
@media (max-width: 736px) { .topbar .brand-context { display: none; } }

/* Drawer */
.drawer-backdrop { position: fixed; inset: 0; z-index: 200; background: var(--overlay-bg); opacity: 0; visibility: hidden; transition: opacity 0.25s ease, visibility 0.25s; }
.drawer {
  position: fixed; top: 0; right: 0; bottom: 0; z-index: 201;
  width: var(--drawer-width); max-width: 88vw;
  display: flex; flex-direction: column;
  background: var(--drawer-bg);
  border-left: var(--border-width) solid var(--border-color);
  box-shadow: var(--shadow-drawer);
  transform: translateX(100%); visibility: hidden;
  transition: transform 0.28s cubic-bezier(0.2, 0.8, 0.2, 1), visibility 0.28s;
}
body.drawer-open .drawer { transform: translateX(0); visibility: visible; }
body.drawer-open .drawer-backdrop { opacity: 1; visibility: visible; }
body.drawer-open { overflow: hidden; }

.drawer-head { display: flex; align-items: center; justify-content: space-between; gap: var(--space-sm); height: var(--topbar-height); padding: 0 var(--space-sm) 0 var(--space-lg); border-bottom: var(--border-width) solid var(--border-color); flex-shrink: 0; }
.drawer-head .who { display: flex; flex-direction: column; min-width: 0; line-height: 1.25; }
.drawer-head .who strong { font-size: var(--font-size-base); font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.drawer-head .who span { font-size: var(--font-size-xs); color: var(--text-muted); }
.drawer-head .icon-button { background: transparent; border-color: transparent; color: var(--text-secondary); }
.drawer-head .icon-button:hover { background: var(--interactive-bg-hover); color: var(--text-primary); }
.drawer-head .icon-button svg { width: 18px; height: 18px; }

.drawer-nav { flex: 1; overflow-y: auto; padding: var(--space-sm) var(--space-md) var(--space-lg); }
.drawer-group { margin-top: var(--space-md); }
.drawer-group > h4 { padding: 0 var(--space-sm); margin: 0 0 4px; font-size: var(--font-size-xs); letter-spacing: 0.08em; color: var(--text-muted); }

.drawer-link, .drawer-item > summary {
  display: flex; align-items: center; gap: 10px;
  min-height: 38px; padding: 6px var(--space-sm); border-radius: var(--radius);
  color: var(--nav-text); font-size: var(--font-size-base); font-weight: 500; text-decoration: none; cursor: pointer;
  list-style: none; user-select: none;
}
.drawer-item > summary::-webkit-details-marker { display: none; }
.drawer-link:hover, .drawer-item > summary:hover { background: var(--interactive-bg-hover); color: var(--nav-text-hover); text-decoration: none; }
.drawer-link.current, .drawer-item.current > summary { color: var(--nav-active-text); font-weight: 600; }
.drawer-link .dot, .drawer-item .dot { width: 8px; height: 8px; border-radius: 2px; background: var(--game-color, var(--text-muted)); flex-shrink: 0; }
.drawer-item > summary .chev { margin-left: auto; width: 16px; height: 16px; color: var(--text-muted); transition: transform 0.2s ease; }
.drawer-item[open] > summary .chev { transform: rotate(180deg); }
.drawer-item[open] > summary { color: var(--nav-active-text); }
.drawer-item > ul { padding: 2px 0 6px 26px; display: flex; flex-direction: column; gap: 1px; }
.drawer-item > ul > li > a {
  display: block; padding: 6px var(--space-sm); border-radius: var(--radius-sm);
  font-size: var(--font-size-sm); color: var(--text-secondary); text-decoration: none;
}
.drawer-item > ul > li > a:hover { background: var(--interactive-bg-hover); color: var(--text-primary); text-decoration: none; }
.drawer-item > ul > li > a.current { color: var(--text-primary); font-weight: 600; background: var(--nav-active-bg); }
.drawer-item > ul > li > a.current::before { content: ''; display: inline-block; width: 3px; height: 12px; border-radius: 2px; background: var(--game-color, var(--text-primary)); margin: 0 8px -2px -11px; }
.drawer-link.danger { color: var(--status-error-main); }
.drawer-link.danger:hover { background: var(--status-error-bg); color: var(--status-error-text); }
.drawer-foot { flex-shrink: 0; padding: var(--space-sm) var(--space-md); border-top: var(--border-width) solid var(--border-color); display: flex; align-items: center; justify-content: space-between; gap: var(--space-sm); font-size: var(--font-size-xs); color: var(--text-muted); }

/* Game colours for the dots, keyed by data-game on .drawer-item */
.drawer-item[data-game="iidx"] { --game-color: var(--game-iidx); }
.drawer-item[data-game="pnm"], .drawer-item[data-game="popn"] { --game-color: var(--game-popn); }
.drawer-item[data-game="ddr"] { --game-color: var(--game-ddr); }
.drawer-item[data-game="sdvx"] { --game-color: var(--game-sdvx); }
.drawer-item[data-game="jubeat"] { --game-color: var(--game-jubeat); }
.drawer-item[data-game="museca"] { --game-color: var(--game-museca); }
.drawer-item[data-game="reflec"] { --game-color: var(--game-reflec); }
.drawer-item[data-game="mga"] { --game-color: var(--game-mga); }
.drawer-item[data-game="bishi"] { --game-color: var(--game-bishi); }
.drawer-item[data-game="danevo"] { --game-color: var(--game-danevo); }
.drawer-item[data-game="nost"] { --game-color: var(--game-nost); }
.drawer-item[data-game="gitadora"] { --game-color: var(--game-gitadora); }
.drawer-item[data-game="bst"] { --game-color: var(--game-bst); }

@media (max-width: 736px) {
  .drawer { width: 100%; max-width: 100%; border-left: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .drawer, .drawer-backdrop, .drawer-item > summary .chev { transition: none; }
}