/* ═══════════════════════════════════════════════════════════════
   NAVIGATION — Digital Rust
   Hamburger, sidebar, breadcrumbs
   ═══════════════════════════════════════════════════════════════ */

html, body {
    overscroll-behavior-x: none;
    -webkit-overflow-scrolling: touch;
}


/* ─── Hamburger menu ─────────────────────────────────────────── */

.hamburger {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
    background: var(--sidebar-bg);
    border: none;
    border-right: var(--dr-border);
    border-bottom: var(--dr-border);
    cursor: pointer;
    padding: 20px;
    width: 60px;
    height: 60px;
    transition: box-shadow var(--dr-transition-fast);
}

.hamburger-icon {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--dr-text-primary);
    position: relative;
    transition: all 0.3s ease-out;
    margin: 0 auto;
}

.hamburger-icon:before, .hamburger-icon:after {
    content: '';
    display: block;
    width: 100%;
    height: 2px;
    background: var(--dr-text-primary);
    position: absolute;
    transition: all 0.3s ease-out;
    left: 0;
}

.hamburger-icon:before { top: -6px; }
.hamburger-icon:after { bottom: -6px; }

/* X animation */
.hamburger.active .hamburger-icon { background: transparent !important; }
.hamburger.active .hamburger-icon:before { top: 0; transform: rotate(45deg); }
.hamburger.active .hamburger-icon:after { bottom: 0; transform: rotate(-45deg); }

.hamburger.scrolled { box-shadow: var(--dr-shadow-offset-md); }


/* ─── Sidebar ────────────────────────────────────────────────── */

.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    background-color: var(--sidebar-bg);
    border-right: var(--dr-border);
    box-sizing: border-box;
    position: fixed;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
    z-index: var(--dr-z-sidebar);
}

/* Scanline overlay on sidebar for lived-in feel */
.sidebar::before {
    content: "";
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        var(--dr-scanline) 2px,
        var(--dr-scanline) 4px
    );
    pointer-events: none;
    z-index: 0;
}

.sidebar > * { position: relative; z-index: 1; }

.sidebar-header {
    padding: 16px;
    border-bottom: var(--dr-border);
    background-color: var(--sidebar-bg);
}

.sidebar-title {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    text-decoration: none;
    color: var(--dr-text-primary);
    font-family: var(--dr-font-heading);
    font-variation-settings: "slnt" 0;
    font-weight: var(--dr-font-weight);
    font-size: var(--dr-text-xl);
    width: 100%;
}

.sidebar-title:hover {
    color: var(--dr-accent);
    text-decoration: none;
}

.logo-container { display: flex; justify-content: center; margin-bottom: var(--dr-space-sm); }
.sidebar-logo { height: 120px; width: 120px; object-fit: contain; }
.title-text { text-align: center; }

.search-container { margin: var(--dr-space-md) 0 0 0; padding: 0 4px; }

/* Scrollable nav items */
.nav-items {
    flex: 1;
    overflow-y: auto;
    padding: var(--dr-space-md);
    display: flex;
    flex-direction: column;
    gap: 2px;
}

/* Sidebar footer */
.sidebar-footer {
    padding: var(--dr-space-md);
    border-top: var(--dr-border-subtle);
    background-color: var(--sidebar-bg);
    font-size: var(--dr-text-xs);
    color: var(--dr-text-tertiary);
    text-align: center;
}

.sidebar-footer .owner {
    color: var(--dr-text-primary);
    font-weight: var(--dr-font-weight);
    margin-bottom: var(--dr-space-xs);
}

.sidebar-footer .notice {
    font-style: italic;
    line-height: 1.4;
    margin-bottom: var(--dr-space-sm);
}

/* Nav items */
.nav-item { margin: 0; border-radius: var(--dr-radius); }

.nav-item.directory { font-weight: var(--dr-font-weight); margin-top: 4px; }

.nav-item.active > a {
    color: var(--dr-accent);
    background-color: var(--hover-bg);
    border-left: 2px solid var(--dr-accent);
}

.nav-children {
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin-top: 2px;
    border-left: 2px solid var(--dr-dark-packet);
}

.nav-item a {
    color: var(--dr-text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--dr-space-xs) var(--dr-space-sm);
    border-radius: var(--dr-radius);
    transition: all var(--dr-transition-fast);
    position: relative;
    gap: var(--dr-space-sm);
    unicode-bidi: plaintext;
    border: 1px solid transparent;
}

.nav-item a:hover {
    color: var(--dr-text-link-hover);
    background-color: var(--hover-bg);
    border-color: var(--dr-surface-highlight);
}

/* Arrow indicator */
.nav-arrow {
    display: inline-block;
    width: 0; height: 0;
    border: solid currentColor;
    border-width: 0 2px 2px 0;
    padding: 4px;
    transform: rotate(-45deg);
    opacity: 0.6;
    transition: transform 0.2s ease;
}

.nav-item.active > a .nav-arrow,
.nav-item.open > a .nav-arrow { transform: rotate(45deg); }

/* ─── Sidebar drag reorder ─────────────────────────────── */

/* Drag handle - only visible for editors+ */
.nav-drag-handle {
    cursor: grab;
    opacity: 0;
    transition: opacity var(--dr-transition-fast);
    flex-shrink: 0;
    padding: 2px 4px;
    margin-right: 2px;
    color: var(--dr-text-tertiary);
    border-radius: var(--dr-radius);
    pointer-events: none;  /* Hidden by default, enabled on hover */
}

.nav-drag-handle:active { cursor: grabbing; }

.nav-item a:hover .nav-drag-handle,
.nav-drag-handle:focus {
    opacity: 1;
    pointer-events: auto;
}

/* Title text — takes remaining space, keeps title left & arrow right */
.nav-title {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--dr-space-sm);
}

/* Dragging state */
.nav-item.sidebar-dragging { opacity: 0.4; }
.nav-item.sidebar-dragging-active { opacity: 0.4; }

/* Drop indicator line */
.nav-item.sidebar-drop-indicator {
    height: 3px;
    background: var(--dr-accent);
    border-radius: 2px;
    margin: 0;
    padding: 0;
    min-height: 3px;
    box-shadow: 0 0 6px var(--dr-accent);
}


/* ─── Breadcrumbs ────────────────────────────────────────────── */

.breadcrumbs {
    margin-bottom: var(--dr-space-sm);
    color: var(--dr-text-tertiary);
    font-size: var(--dr-text-sm);
    position: fixed;
    top: 0;
    left: var(--sidebar-width);
    right: 0;
    padding: var(--dr-space-sm) 3rem;
    background: var(--bg-color);
    border-bottom: var(--dr-border-subtle);
    z-index: 90;
    transition: box-shadow var(--dr-transition-fast);
}

body.has-password-warning .breadcrumbs { top: 40px; }
.breadcrumbs.scrolled { box-shadow: var(--dr-shadow-offset-md); }

.breadcrumbs-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--dr-space-sm);
    width: 100%;
    max-width: calc(var(--content-max-width) - 6rem);
    margin: 0;
    height: 3rem;
}

.breadcrumbs-path {
    display: flex;
    align-items: center;
    gap: var(--dr-space-sm);
    overflow-x: auto;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none !important;
    -ms-overflow-style: none !important;
}

.breadcrumbs-path::-webkit-scrollbar { display: none !important; }

.breadcrumbs a {
    color: var(--dr-text-link);
    text-decoration: none;
}

.breadcrumbs a:hover {
    color: var(--dr-text-link-hover);
    text-decoration: underline;
}

.breadcrumbs .separator { color: var(--dr-text-tertiary); }


/* ─── Mobile responsive ─────────────────────────────────────── */

@media (max-width: 950px) {
    .hamburger {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 47px;
        height: 47px;
        padding: 12px;
        position: fixed;
        top: 0;
        left: 0;
        z-index: 1001;
        background: var(--bg-color);
        border-bottom: var(--dr-border);
        border-right: var(--dr-border);
        box-sizing: border-box;
    }

    body.has-password-warning .hamburger { height: 48px; top: 40px; left: 0; }
    .hamburger.active { z-index: 1002; }

    .sidebar {
        transform: translateX(-100%);
        width: min(var(--sidebar-width), 85vw);
        box-shadow: var(--dr-shadow-offset-lg);
        position: fixed;
        top: 0;
        left: 0;
        height: 100%;
        z-index: 1001;
    }

    .sidebar.active { transform: translateX(0); }

    body.sidebar-active .editor-container.active {
        margin-left: min(var(--sidebar-width), 85vw);
        width: calc(100% - min(var(--sidebar-width), 85vw));
        transition: margin-left 0.3s ease, width 0.3s ease;
    }

    body.sidebar-active { position: fixed; width: 100%; height: 100%; }

    body.sidebar-active::after {
        content: '';
        position: fixed;
        top: 0; left: 0; right: 0; bottom: 0;
        background: var(--dr-overlay);
        z-index: 90;
    }

    /* Mobile breadcrumbs */
    .breadcrumbs {
        top: 0;
        left: 47px;
        padding: 0 10px;
        margin: 0;
        height: 47px;
        display: flex;
        align-items: center;
        border-bottom: var(--dr-border);
        box-sizing: border-box;
    }

    .breadcrumbs-container.auth-dropdown-open {
        overflow: visible !important;
    }

    .breadcrumbs-container {
        width: 100%;
        max-width: none;
        height: 47px;
        overflow-x: auto;
        scrollbar-width: none !important;
        -ms-overflow-style: none !important;
    }
    .breadcrumbs-container::-webkit-scrollbar { display: none !important; }

    .breadcrumbs-path {
        padding: 0;
        height: 100%;
        scrollbar-width: none !important;
        -ms-overflow-style: none !important;
    }
    .breadcrumbs-path::-webkit-scrollbar { display: none !important; }

    .breadcrumbs .separator { margin: 0 4px; }

    body.has-password-warning .breadcrumbs {
        top: 40px;
        margin-bottom: 35px;
    }
}

/* Dark theme scrollbar override */
:root[data-theme="dark"] .breadcrumbs-path {
    scrollbar-width: none !important;
    -ms-overflow-style: none !important;
}
:root[data-theme="dark"] .breadcrumbs-path::-webkit-scrollbar { display: none !important; }