.nav-main { width: min(860px, 100%); margin: 0 auto; padding: 44px 20px 70px; }
.nav-intro { margin-bottom: 24px; }
.nav-intro h1 { margin: 0; color: var(--heading); font-size: clamp(32px, 5vw, 44px); line-height: 1.2; }
.nav-intro p { margin: 8px 0 0; color: var(--text-dim); }
.nav-toolbar { display: flex; gap: 12px; margin-bottom: 14px; }
.search-wrap { position: relative; display: flex; flex: 1; align-items: center; }
.search-icon { position: absolute; left: 12px; width: 16px; height: 16px; color: var(--text-dim); pointer-events: none; }
#searchInput { width: 100%; padding: 13px 44px 13px 38px; color: var(--text); background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); outline: none; font-size: 15px; transition: border-color .2s ease, box-shadow .2s ease, background .2s ease; }
#searchInput:focus { background: rgba(var(--surface-2-rgb), .96); border-color: rgba(var(--secondary-rgb), .58); box-shadow: 0 0 0 3px rgba(var(--secondary-rgb), .09); }
#searchInput::placeholder { color: var(--text-dim); }
.search-shortcut { position: absolute; right: 12px; padding: 1px 8px; color: var(--text-dim); background: rgba(var(--highlight-rgb), .035); border: 1px solid var(--border); border-radius: 5px; font: inherit; font-size: 12px; }
.tag-bar { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 18px; }
.tag-chip { padding: 4px 12px; color: var(--text-dim); background: rgba(var(--surface-rgb), .72); border: 1px solid var(--border); border-radius: 99px; cursor: pointer; user-select: none; font-size: 12px; transition: border-color .15s ease, color .15s ease, background .15s ease; }
.tag-chip:hover { color: var(--text); border-color: rgba(var(--secondary-rgb), .42); }
.tag-chip.active { color: var(--bg); background: var(--accent); border-color: var(--accent); font-weight: 700; }
.tag-chip.tag-main { color: var(--accent-hover); border-color: rgba(var(--accent-rgb), .35); font-weight: 600; }
.tag-chip.tag-main.active { color: var(--bg); background: var(--accent); border-color: var(--accent); }
.link-list { display: flex; flex-direction: column; gap: 8px; margin: 0; padding: 0; list-style: none; }
.cat-header { margin: 3px 0 1px; padding: 16px 4px 5px; color: var(--accent-hover); border-bottom: 1px solid rgba(var(--accent-rgb), .16); list-style: none; font-size: 13px; font-weight: 700; letter-spacing: .08em; }
.cat-header:first-child { padding-top: 4px; }
.link-card { position: relative; background: var(--card-bg); border: 1px solid var(--card-border); border-radius: var(--radius); box-shadow: var(--card-shadow); transition: transform .18s ease, border-color .18s ease, background .18s ease, box-shadow .18s ease; }
.link-card:hover { transform: translateY(-1px); background: var(--card-bg-hover); border-color: var(--card-border-hover); box-shadow: var(--card-shadow-hover); }
.link-card.expanded { border-color: var(--card-border-hover); }
.link-main { display: flex; align-items: center; gap: 12px; padding: 10px 42px 10px 14px; color: var(--text); border-radius: var(--radius); text-decoration: none; }
.link-main:focus-visible { outline-color: var(--secondary); }
.expand-toggle { position: absolute; z-index: 2; top: 14px; right: 14px; display: flex; align-items: center; justify-content: center; width: 22px; height: 22px; color: var(--text-dim); border-radius: 5px; cursor: pointer; transition: transform .2s ease, color .15s ease, background .15s ease; }
.expand-toggle:hover, .expand-toggle:focus-visible { color: var(--secondary-hover); background: rgba(var(--secondary-rgb), .08); }
.expand-toggle svg { width: 14px; height: 14px; }
.link-card.expanded .expand-toggle { color: var(--secondary); transform: rotate(180deg); }
.sub-links { display: flex; max-height: 0; overflow: hidden; flex-direction: column; gap: 5px; margin: 0; padding: 0 14px 0 42px; background: rgba(var(--bg-rgb), .7); border-top: 0 solid transparent; border-radius: 0 0 var(--radius) var(--radius); list-style: none; opacity: 0; visibility: hidden; transition: max-height .25s ease, opacity .2s ease, padding .25s ease, border-width .25s ease, visibility 0s linear .25s; }
.sub-links.show { max-height: 300px; padding-top: 7px; padding-bottom: 9px; border-top-width: 1px; border-top-color: var(--border); opacity: 1; visibility: visible; transition-delay: 0s; }
.sub-link { display: flex; align-items: center; gap: 8px; padding: 7px 12px; color: var(--text); background: rgba(var(--surface-3-rgb), .78); border-left: 2px solid rgba(var(--secondary-rgb), .28); border-radius: 0 6px 6px 0; text-decoration: none; font-size: 13px; transition: border-color .15s ease, color .15s ease, background .15s ease; }
.sub-link:hover, .sub-link:focus-visible { color: var(--secondary-hover); background: rgba(var(--surface-3-rgb), .96); border-left-color: var(--secondary); }
.sub-link-title { font-weight: 600; white-space: nowrap; }
.sub-link-url { min-width: 0; overflow: hidden; color: var(--text-dim); font-size: 11px; text-overflow: ellipsis; white-space: nowrap; }
.site-icon-wrap { position: relative; flex-shrink: 0; width: 32px; height: 32px; overflow: hidden; background: var(--surface-2); border: 1px solid rgba(var(--secondary-rgb), .1); border-radius: 7px; }
.site-icon { width: 100%; height: 100%; object-fit: contain; }
.icon-fallback { position: absolute; inset: 0; display: none; align-items: center; justify-content: center; color: var(--secondary-hover); background: var(--surface-2); font-size: 13px; font-weight: 700; }
.link-body { display: flex; flex: 1; min-width: 0; align-items: baseline; gap: 8px; overflow: hidden; }
.link-title { font-size: 14px; font-weight: 600; white-space: nowrap; }
.link-url { min-width: 0; overflow: hidden; color: var(--text-dim); font-size: 12px; text-overflow: ellipsis; white-space: nowrap; }
.link-tags { display: flex; flex-shrink: 0; gap: 4px; }
.link-tag { padding: 1px 6px; color: var(--accent-hover); background: rgba(var(--accent-rgb), .09); border: 1px solid rgba(var(--accent-rgb), .22); border-radius: 4px; font-size: 10px; white-space: nowrap; }
.empty-hint { padding: 40px 0; color: var(--text-dim); text-align: center; font-size: 14px; }
@media (max-width: 600px) {
    .nav-main { padding: 32px 14px 54px; }
    .tag-bar { flex-wrap: nowrap; overflow-x: auto; padding-bottom: 6px; scrollbar-width: none; }
    .tag-bar::-webkit-scrollbar { display: none; }
    .tag-chip { flex-shrink: 0; }
    .link-url { display: none; }
    .link-tags .link-tag { display: none; }
    .link-tags .link-tag:first-child { display: inline-block; }
    .sub-links { padding-right: 10px; padding-left: 24px; }
}