.nav {
    position: sticky;
    top: var(--s3);
    z-index: 50;
    animation: fadeUp var(--dur-3) var(--ease) both;
}

.nav-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--s4);
    height: 56px;
    padding: 0 var(--s5);
    border-radius: var(--r4);
    background: var(--nav-bg);
    border: 1px solid var(--border);
    backdrop-filter: blur(20px) saturate(1.2);
    -webkit-backdrop-filter: blur(20px) saturate(1.2);
    box-shadow: var(--shadow-sm);
    transition: background var(--dur-2), border-color var(--dur-2);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--s3);
    text-decoration: none;
    color: inherit;
}

.nav-logo img {
    width: 32px;
    height: 32px;
    border-radius: var(--r2);
    object-fit: contain;
}

.nav-logo-text {
    display: flex;
    flex-direction: column;
    gap: 1px;
    line-height: 1.15;
}

.nav-logo-text strong {
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.01em;
}

.nav-logo-text span {
    font-size: 0.68rem;
    font-weight: 600;
    color: var(--text-4);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--s2);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--s2);
    height: 36px;
    padding: 0 var(--s4);
    border-radius: var(--r3);
    font-size: 0.85rem;
    font-weight: 600;
    white-space: nowrap;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-2);
    cursor: pointer;
    text-decoration: none;
    font-family: inherit;
    transition:
        background var(--dur-1),
        border-color var(--dur-1),
        color var(--dur-1),
        transform var(--dur-1),
        box-shadow var(--dur-1);
    user-select: none;
}

.btn:hover {
    background: var(--bg-hover);
    border-color: var(--border-hover);
    color: var(--text);
}

.btn:active {
    transform: scale(0.97);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.btn:focus-visible {
    outline: 2px solid var(--border-focus);
    outline-offset: 2px;
}

.btn-primary {
    background: var(--a-5);
    border-color: var(--a-4);
    color: #111;
    font-weight: 700;
    box-shadow: 0 4px 16px rgba(255, 184, 0, 0.25);
}

.btn-primary:hover {
    background: var(--a-6);
    border-color: var(--a-5);
    color: #000;
    box-shadow: 0 6px 22px rgba(255, 184, 0, 0.35);
}

.btn-danger-text {
    color: var(--danger);
    border-color: transparent;
    background: transparent;
}

.btn-danger-text:hover {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.25);
    color: var(--danger);
}

.btn-sm {
    height: 32px;
    padding: 0 var(--s3);
    font-size: 0.82rem;
}

.btn-icon {
    width: 36px;
    padding: 0;
}

.theme-btn {
    position: relative;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--r3);
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-3);
    cursor: pointer;
    transition:
        background var(--dur-1),
        border-color var(--dur-1),
        color var(--dur-1);
    overflow: hidden;
    font-family: inherit;
}

.theme-btn:hover {
    background: var(--bg-hover);
    border-color: var(--border-hover);
    color: var(--text-accent);
}

.theme-btn:focus-visible {
    outline: 2px solid var(--border-focus);
    outline-offset: 2px;
}

.theme-btn svg {
    position: absolute;
    transition:
        opacity var(--dur-2),
        transform var(--dur-2) var(--ease);
}

.theme-btn .icon-sun {
    opacity: 0;
    transform: rotate(-90deg) scale(0.5);
}

.theme-btn .icon-moon {
    opacity: 1;
    transform: rotate(0) scale(1);
}

[data-theme="light"] .theme-btn .icon-sun {
    opacity: 1;
    transform: rotate(0) scale(1);
}

[data-theme="light"] .theme-btn .icon-moon {
    opacity: 0;
    transform: rotate(90deg) scale(0.5);
}

.input-wrap {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--s2);
    height: 40px;
    padding: 0 var(--s3);
    border-radius: var(--r3);
    background: var(--input-bg);
    border: 1px solid var(--border);
    transition:
        border-color var(--dur-2),
        box-shadow var(--dur-2),
        background var(--dur-2);
}

.input-wrap:focus-within {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px var(--glow-strong);
}

.input-wrap svg {
    color: var(--text-4);
    flex-shrink: 0;
}

.input-wrap input {
    flex: 1;
    min-width: 0;
    height: 100%;
    border: none;
    outline: none;
    background: none;
    color: var(--text);
    font-family: var(--font);
    font-size: 0.9rem;
}

.input-wrap input::placeholder {
    color: var(--text-4);
}

.input-wrap .search-keys {
    display: flex;
    align-items: center;
    gap: 3px;
    flex-shrink: 0;
}

kbd {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    padding: 0 5px;
    border-radius: var(--r1);
    font-family: var(--mono);
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--text-4);
    background: var(--bg-card);
    border: 1px solid var(--border);
    line-height: 1;
}

.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 22px;
    padding: 0 var(--s2);
    border-radius: var(--r1);
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    white-space: nowrap;
    flex-shrink: 0;
}

.badge-dir {
    background: var(--badge-dir-bg);
    border: 1px solid var(--badge-dir-border);
    color: var(--badge-dir-text);
}

.badge-file {
    background: var(--badge-file-bg);
    border: 1px solid var(--badge-file-border);
    color: var(--badge-file-text);
}

.footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--s4);
    padding: var(--s5) 0;
    margin-top: var(--s8);
    border-top: 1px solid var(--border);
    font-size: 0.78rem;
    color: var(--text-4);
}

.footer a {
    color: var(--text-3);
    text-decoration: none;
    transition: color var(--dur-1);
}

.footer a:hover {
    color: var(--text-accent);
}

.ac-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    background: var(--bg-elevated, rgba(22, 25, 34, 0.95));
    border: 1px solid var(--border-hover, rgba(255, 255, 255, 0.15));
    border-radius: var(--r3, 12px);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(24px) saturate(1.2);
    -webkit-backdrop-filter: blur(24px) saturate(1.2);
    z-index: 9999;
    overflow: hidden;
    opacity: 0;
    transform: translateY(-6px) scale(0.98);
    pointer-events: none;
    transition:
        opacity 180ms var(--ease),
        transform 180ms var(--ease);
}

.ac-dropdown.show {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

.ac-list {
    list-style: none;
    margin: 0;
    padding: 6px;
    max-height: 180px;
    overflow-y: auto;
    overscroll-behavior: contain;
}

.ac-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--s3, 12px);
    padding: 10px 14px;
    border-radius: var(--r2, 8px);
    cursor: pointer;
    text-decoration: none;
    color: var(--text);
    transition: background 120ms ease, color 120ms ease;
    user-select: none;
    border-left: 3px solid transparent;
}

html[dir="rtl"] .ac-item {
    border-left: none;
    border-right: 3px solid transparent;
}

.ac-item:hover,
.ac-item.active {
    background: var(--bg-hover, rgba(255, 255, 255, 0.08));
}

.ac-item.active {
    border-left-color: var(--a-5, #ffb800);
}

html[dir="rtl"] .ac-item.active {
    border-left-color: transparent;
    border-right-color: var(--a-5, #ffb800);
}

.ac-item-left {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
    flex: 1;
}

.ac-icon {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--r1, 4px);
    flex-shrink: 0;
}

.ac-icon-dir {
    background: var(--badge-dir-bg);
    color: var(--a-5);
    border: 1px solid var(--badge-dir-border);
}

.ac-icon-file {
    background: var(--badge-file-bg);
    color: var(--text-3);
    border: 1px solid var(--badge-file-border);
}

.ac-info {
    display: flex;
    flex-direction: column;
    gap: 1px;
    min-width: 0;
}

.ac-name {
    font-size: 0.88rem;
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--text);
}

.ac-path {
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--text-4);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ac-highlight {
    color: var(--a-5, #ffb800);
    font-weight: 800;
    background: rgba(255, 184, 0, 0.12);
    padding: 0 2px;
    border-radius: 2px;
}

.ac-footer {
    padding: 8px 14px;
    border-top: 1px solid var(--border);
    background: rgba(0, 0, 0, 0.15);
    font-size: 0.75rem;
    color: var(--text-4);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--s3);
}

[data-theme="light"] .ac-footer {
    background: rgba(0, 0, 0, 0.04);
}

.ac-footer kbd {
    font-size: 0.65rem;
    padding: 1px 5px;
    margin: 0 2px;
}

.ac-empty {
    padding: 18px 14px;
    text-align: center;
    color: var(--text-4);
    font-size: 0.85rem;
}

@media (max-width: 768px) {
    .page {
        width: min(100% - var(--s4), 100%);
        padding: var(--s4) 0 var(--s12);
    }

    .nav-bar {
        height: 48px;
        padding: 0 var(--s4);
    }

    .nav-logo-text span {
        display: none;
    }

    .input-wrap .search-keys {
        display: none;
    }

    .ac-dropdown {
        max-width: 100%;
    }

    .ac-footer {
        display: none;
    }

    .footer {
        flex-direction: column;
        text-align: center;
        gap: var(--s2);
    }
}

@media (max-width: 480px) {
    .nav-actions .btn-sm:not(.btn-icon):not(.theme-btn) {
        display: none;
    }

    .theme-btn,
    .btn-icon {
        width: 34px;
        height: 34px;
    }
}

@media (prefers-reduced-motion: reduce) {

    .nav,
    .btn,
    .theme-btn,
    .theme-btn svg,
    .input-wrap,
    .ac-dropdown {
        animation: none !important;
        transition-duration: 0.01ms !important;
    }
}