/* ==========================================================
   Drive — OneDrive-style UI
   Tema terang & gelap via [data-theme] CSS variables
   ========================================================== */

:root,
html[data-theme="light"] {
    --dv-accent: #0f6cbd;
    --dv-accent-hover: #0c5aa0;
    --dv-bg: #f5f6f8;
    --dv-surface: #ffffff;
    --dv-surface-2: #f0f2f5;
    --dv-border: #e2e5ea;
    --dv-text: #242424;
    --dv-text-muted: #6b7280;
    --dv-hover: rgba(15, 108, 189, .07);
    --dv-selected: rgba(15, 108, 189, .13);
    --dv-shadow: 0 1px 3px rgba(0, 0, 0, .08);
    --dv-folder: #ffb900;
}

html[data-theme="dark"] {
    --dv-accent: #4f9fe6;
    --dv-accent-hover: #6fb2ec;
    --dv-bg: #16181d;
    --dv-surface: #1f232b;
    --dv-surface-2: #262b34;
    --dv-border: #333a45;
    --dv-text: #e7e9ec;
    --dv-text-muted: #98a1ad;
    --dv-hover: rgba(79, 159, 230, .12);
    --dv-selected: rgba(79, 159, 230, .22);
    --dv-shadow: 0 1px 3px rgba(0, 0, 0, .4);
    --dv-folder: #f2c94c;
    color-scheme: dark;
}

body {
    background: var(--dv-bg);
    color: var(--dv-text);
    font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
    font-size: .925rem;
}

a { color: var(--dv-accent); text-decoration: none; }
a:hover { color: var(--dv-accent-hover); }

.btn-primary {
    --bs-btn-bg: var(--dv-accent);
    --bs-btn-border-color: var(--dv-accent);
    --bs-btn-hover-bg: var(--dv-accent-hover);
    --bs-btn-hover-border-color: var(--dv-accent-hover);
    --bs-btn-active-bg: var(--dv-accent-hover);
    --bs-btn-active-border-color: var(--dv-accent-hover);
}
.btn-outline-primary {
    --bs-btn-color: var(--dv-accent);
    --bs-btn-border-color: var(--dv-accent);
    --bs-btn-hover-bg: var(--dv-accent);
    --bs-btn-hover-border-color: var(--dv-accent);
}

/* ---------- Layout shell ---------- */
.app-shell { display: flex; min-height: 100vh; }

.sidebar {
    width: 250px;
    flex-shrink: 0;
    background: var(--dv-surface);
    border-right: 1px solid var(--dv-border);
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: .6rem;
    padding: 1.1rem 1.25rem;
    font-size: 1.15rem;
    font-weight: 600;
}
.brand-icon { color: var(--dv-accent); font-size: 1.5rem; }

.sidebar-nav { flex: 1; overflow-y: auto; padding: .25rem .6rem; }

.side-link {
    display: flex;
    align-items: center;
    gap: .75rem;
    padding: .55rem .75rem;
    margin-bottom: 2px;
    border-radius: 6px;
    color: var(--dv-text);
    border-left: 3px solid transparent;
}
.side-link i { width: 18px; text-align: center; color: var(--dv-text-muted); }
.side-link:hover { background: var(--dv-hover); color: var(--dv-text); }
.side-link.active {
    background: var(--dv-selected);
    border-left-color: var(--dv-accent);
    font-weight: 600;
}
.side-link.active i { color: var(--dv-accent); }

.side-section {
    font-size: .72rem;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--dv-text-muted);
    padding: .9rem .75rem .3rem;
}

.sidebar-storage {
    padding: 1rem 1.25rem;
    border-top: 1px solid var(--dv-border);
}
.storage-progress { height: 6px; background: var(--dv-surface-2); }
.storage-progress .progress-bar { background: var(--dv-accent); }

.main-area { flex: 1; min-width: 0; display: flex; flex-direction: column; }

.topbar {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: .6rem 1.25rem;
    background: var(--dv-surface);
    border-bottom: 1px solid var(--dv-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.topbar-search { position: relative; flex: 1; max-width: 520px; }
.topbar-search .form-control {
    padding-left: 2.3rem;
    background: var(--dv-surface-2);
    border-color: transparent;
    color: var(--dv-text);
}
.topbar-search .form-control:focus {
    background: var(--dv-surface);
    border-color: var(--dv-accent);
    box-shadow: none;
}
.search-icon {
    position: absolute;
    left: .85rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--dv-text-muted);
    pointer-events: none;
}

.topbar-actions { display: flex; align-items: center; gap: .4rem; margin-left: auto; }

.btn-icon {
    background: transparent;
    border: none;
    color: var(--dv-text-muted);
    width: 38px;
    height: 38px;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.btn-icon:hover { background: var(--dv-hover); color: var(--dv-text); }

.user-chip {
    display: flex;
    align-items: center;
    gap: .5rem;
    border: none;
    background: transparent;
    color: var(--dv-text);
    border-radius: 24px;
    padding: .25rem .6rem;
}
.user-chip:hover { background: var(--dv-hover); color: var(--dv-text); }

.avatar-sm { width: 32px; height: 32px; border-radius: 50%; object-fit: cover; }
.avatar-lg { width: 72px; height: 72px; border-radius: 50%; object-fit: cover; }

.content { padding: 1.5rem; flex: 1; }

/* ---------- Panels & stats ---------- */
.panel {
    background: var(--dv-surface);
    border: 1px solid var(--dv-border);
    border-radius: 10px;
    box-shadow: var(--dv-shadow);
    overflow: hidden;
}
.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: .9rem 1rem;
    border-bottom: 1px solid var(--dv-border);
}

.stat-card {
    display: flex;
    align-items: center;
    gap: .9rem;
    background: var(--dv-surface);
    border: 1px solid var(--dv-border);
    border-radius: 10px;
    padding: 1rem;
    box-shadow: var(--dv-shadow);
    height: 100%;
}
.stat-icon {
    width: 46px;
    height: 46px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}
.stat-value { font-size: 1.25rem; font-weight: 700; line-height: 1.2; }
.stat-label { font-size: .8rem; color: var(--dv-text-muted); }

.recent-row {
    display: flex;
    align-items: center;
    gap: .9rem;
    padding: .65rem 1rem;
    border-bottom: 1px solid var(--dv-border);
}
.recent-row:last-child { border-bottom: none; }
.recent-row > i { width: 22px; text-align: center; font-size: 1.05rem; }

/* ---------- File manager ---------- */
.fm-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: .75rem;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}
.fm-breadcrumb .breadcrumb-item a { color: var(--dv-accent); }
.fm-breadcrumb .breadcrumb-item.active { color: var(--dv-text); font-weight: 600; }
.fm-actions { display: flex; align-items: center; gap: .4rem; }
.view-btn.active {
    background: var(--dv-accent);
    border-color: var(--dv-accent);
    color: #fff;
}

.fm-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: .75rem;
}

.fm-grid .fm-item {
    background: var(--dv-surface);
    border: 1px solid var(--dv-border);
    border-radius: 10px;
    padding: .85rem .6rem .7rem;
    text-align: center;
    cursor: pointer;
    user-select: none;
    transition: background .12s, border-color .12s;
}
.fm-grid .fm-item:hover { background: var(--dv-hover); }
.fm-grid .fm-item.selected,
.fm-table .fm-item.selected { background: var(--dv-selected); border-color: var(--dv-accent); }
.fm-item:focus-visible { outline: 2px solid var(--dv-accent); outline-offset: 2px; }

.fm-thumb {
    height: 84px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: .5rem;
    overflow: hidden;
    border-radius: 6px;
}
.fm-thumb i { font-size: 3rem; }
.fm-thumb img { width: 100%; height: 100%; object-fit: cover; border-radius: 6px; }

.fm-name {
    font-size: .84rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.fm-meta { font-size: .72rem; color: var(--dv-text-muted); }

.folder-color { color: var(--dv-folder); }

.fm-list { background: var(--dv-surface); border: 1px solid var(--dv-border); border-radius: 10px; overflow: auto; }
.fm-table { margin-bottom: 0; --bs-table-bg: transparent; color: var(--dv-text); }
.fm-table th {
    font-size: .76rem;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--dv-text-muted);
    border-color: var(--dv-border);
    font-weight: 600;
}
.fm-table td { border-color: var(--dv-border); color: var(--dv-text); }
.fm-table tr.fm-item { cursor: pointer; }
.fm-table tr.fm-item:hover td { background: var(--dv-hover); }
.fm-table tr.fm-item.selected td { background: var(--dv-selected); }

/* ---------- Empty state ---------- */
.empty-state {
    text-align: center;
    padding: 4rem 1rem;
    color: var(--dv-text-muted);
}
.empty-state i { font-size: 3.2rem; margin-bottom: 1rem; color: var(--dv-border); }
.empty-state h5 { color: var(--dv-text); }

/* ---------- Context menu ---------- */
.context-menu {
    position: fixed;
    z-index: 2000;
    min-width: 210px;
    background: var(--dv-surface);
    border: 1px solid var(--dv-border);
    border-radius: 10px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, .18);
    list-style: none;
    padding: .35rem;
    margin: 0;
    display: none;
}
.context-menu.show { display: block; }
.context-menu li {
    display: flex;
    align-items: center;
    gap: .7rem;
    padding: .5rem .7rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: .875rem;
}
.context-menu li i { width: 16px; text-align: center; color: var(--dv-text-muted); }
.context-menu li:hover { background: var(--dv-hover); }
.context-menu li.divider {
    height: 1px;
    background: var(--dv-border);
    padding: 0;
    margin: .3rem .4rem;
    cursor: default;
}
.context-menu li.d-none { display: none; }

/* ---------- Drag & drop ---------- */
.drop-overlay {
    position: fixed;
    inset: 0;
    z-index: 1500;
    background: rgba(15, 108, 189, .15);
    backdrop-filter: blur(2px);
    display: none;
    align-items: center;
    justify-content: center;
}
.drop-overlay.show { display: flex; }
.drop-overlay-inner {
    background: var(--dv-surface);
    border: 2px dashed var(--dv-accent);
    border-radius: 16px;
    padding: 3rem 4rem;
    text-align: center;
    color: var(--dv-accent);
}
.drop-overlay-inner i { font-size: 3rem; margin-bottom: .75rem; }
.drop-overlay-inner p { margin: 0; font-weight: 600; }

.upload-panel {
    background: var(--dv-surface);
    border: 1px solid var(--dv-border);
    border-radius: 10px;
    padding: .8rem 1rem;
    margin-bottom: 1rem;
}
.upload-panel .progress-bar { background: var(--dv-accent); }

/* ---------- Preview modal ---------- */
.preview-modal { background: var(--dv-surface); color: var(--dv-text); }
.preview-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 320px;
    max-height: 78vh;
    overflow: auto;
    background: var(--dv-surface-2);
}
.preview-body img { max-width: 100%; max-height: 74vh; object-fit: contain; }
.preview-body iframe { width: 100%; height: 74vh; border: 0; }
.preview-body video { max-width: 100%; max-height: 74vh; }
.preview-body audio { width: 90%; }
.preview-body pre {
    width: 100%;
    max-height: 70vh;
    text-align: left;
    padding: 1rem;
    color: var(--dv-text);
}

/* ---------- Modals & forms (dark mode aware) ---------- */
.modal-content {
    background: var(--dv-surface);
    color: var(--dv-text);
    border: 1px solid var(--dv-border);
    border-radius: 12px;
}
.modal-header, .modal-footer { border-color: var(--dv-border); }
html[data-theme="dark"] .btn-close { filter: invert(1) grayscale(100%) brightness(180%); }

.form-control, .form-select {
    background: var(--dv-surface);
    color: var(--dv-text);
    border-color: var(--dv-border);
}
.form-control:focus, .form-select:focus {
    background: var(--dv-surface);
    color: var(--dv-text);
    border-color: var(--dv-accent);
    box-shadow: 0 0 0 .2rem rgba(15, 108, 189, .15);
}
.form-control::placeholder { color: var(--dv-text-muted); }

.dropdown-menu {
    background: var(--dv-surface);
    border: 1px solid var(--dv-border);
    box-shadow: 0 8px 24px rgba(0, 0, 0, .15);
}
.dropdown-item { color: var(--dv-text); }
.dropdown-item:hover { background: var(--dv-hover); color: var(--dv-text); }
.dropdown-divider { border-color: var(--dv-border); }

.list-group-item {
    background: var(--dv-surface);
    color: var(--dv-text);
    border-color: var(--dv-border);
}

.table > :not(caption) > * > * { background: transparent; }
.text-muted { color: var(--dv-text-muted) !important; }
.breadcrumb-item + .breadcrumb-item::before { color: var(--dv-text-muted); }

.share-qr { width: 180px; height: 180px; border-radius: 10px; border: 1px solid var(--dv-border); }

/* ---------- Guest (auth & public share) ---------- */
.guest-body {
    background: linear-gradient(160deg, var(--dv-bg) 0%, var(--dv-surface-2) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}
.guest-wrap { width: 100%; max-width: 460px; }
.guest-card {
    background: var(--dv-surface);
    border: 1px solid var(--dv-border);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, .08);
}
.guest-logo { font-size: 2.6rem; color: var(--dv-accent); }
.guest-title { font-size: 1.4rem; font-weight: 700; margin: .4rem 0 0; }
.guest-footer { color: var(--dv-text-muted); }
.share-frame { width: 100%; height: 60vh; border: 0; border-radius: 8px; }
.share-folder-list { max-height: 55vh; overflow: auto; }
.share-preview video, .share-preview img { max-height: 50vh; }

/* ---------- Responsive sidebar ---------- */
.sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, .4);
    z-index: 1040;
}

@media (max-width: 991.98px) {
    .sidebar {
        position: fixed;
        left: -260px;
        top: 0;
        z-index: 1050;
        transition: left .22s ease;
        box-shadow: 4px 0 24px rgba(0, 0, 0, .2);
    }
    .sidebar.open { left: 0; }
    .sidebar-backdrop.show { display: block; }
    .content { padding: 1rem; }
    .fm-grid { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); }
    .fm-thumb { height: 68px; }
    .fm-thumb i { font-size: 2.4rem; }
}

@media (prefers-reduced-motion: reduce) {
    * { transition: none !important; animation: none !important; }
}