:root {
    --surface: rgba(255, 255, 255, 0.86);
    --surface-strong: #fffdf9;
    --surface-alt: #f8f1e8;
    --line: rgba(76, 53, 34, 0.14);
    --text: #26170f;
    --muted: #6d5b4d;
    --accent: #d96c2d;
    --accent-strong: #b6501d;
    --accent-soft: #ffe3cf;
    --danger: #ba3a22;
    --danger-soft: #fde2db;
    --shadow: 0 28px 60px rgba(77, 40, 16, 0.12);
    --radius-xl: 30px;
    --radius-lg: 22px;
    --radius-md: 16px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: 'Manrope', sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(255, 199, 158, 0.65), transparent 30%),
        radial-gradient(circle at bottom right, rgba(227, 220, 193, 0.95), transparent 34%),
        linear-gradient(135deg, #f5ecdf 0%, #efe6da 45%, #ede9dd 100%);
}

button,
input,
select {
    font: inherit;
}

.hidden {
    display: none !important;
}

.auth-screen {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}

.auth-card,
.sidebar,
.workspace {
    backdrop-filter: blur(18px);
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
}

.auth-card {
    width: min(100%, 480px);
    padding: 30px;
}

.auth-copy,
.sidebar-copy,
.tips-card p,
.dialog p,
.settings-card p,
.shortcut-card span {
    color: var(--muted);
    line-height: 1.6;
}

.auth-form,
.dialog-form,
.admin-form {
    display: grid;
    gap: 14px;
}

.auth-form {
    margin-top: 18px;
}

.auth-form input,
.dialog input,
.toolbar input,
.toolbar select,
.admin-form input,
.admin-form select {
    width: 100%;
    border: 1px solid var(--line);
    background: white;
    border-radius: 14px;
    padding: 13px 14px;
    color: var(--text);
}

.auth-hint,
.account-card,
.settings-card,
.shortcut-card,
.admin-form,
.admin-users {
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: var(--surface-alt);
}

.auth-hint,
.account-card {
    display: grid;
    gap: 6px;
    margin-top: 18px;
    padding: 18px;
}

.auth-hint span,
.account-card span,
.stats-card span,
.status-row span,
.item-type,
.topbar p,
.section-meta {
    display: block;
    font-size: 0.82rem;
    color: var(--muted);
}

.auth-feedback {
    margin-top: 12px;
}

.app-layout {
    display: grid;
    grid-template-columns: 290px 1fr;
    gap: 24px;
    padding: 24px;
}

.sidebar {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 24px;
    min-height: calc(100vh - 48px);
}

.brand-block h1,
.topbar h2,
.hero-panel h2,
.panel-header h3,
.dialog h3,
.auth-card h1 {
    margin: 0;
    font-family: 'Space Grotesk', sans-serif;
    letter-spacing: -0.04em;
}

.brand-block {
    margin-bottom: 26px;
}

.eyebrow {
    margin: 0 0 10px;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    font-size: 0.74rem;
    color: var(--accent-strong);
    font-weight: 800;
}

.nav-menu {
    display: grid;
    gap: 8px;
}

.nav-link {
    text-align: left;
    border: 1px solid transparent;
    background: transparent;
    color: var(--text);
    padding: 13px 14px;
    border-radius: 14px;
    cursor: pointer;
    font-weight: 700;
}

.nav-link.active {
    background: var(--accent-soft);
    color: var(--accent-strong);
    border-color: rgba(217, 108, 45, 0.18);
}

.full-btn {
    width: 100%;
    margin-top: 14px;
}

.workspace {
    padding: 22px;
}

.topbar,
.hero-panel,
.toolbar,
.status-row,
.panel-header,
.preview-actions,
.item-actions,
.user-card-head,
.ppt-preview-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.topbar {
    margin-bottom: 18px;
}

.hero-panel,
.toolbar,
.status-row,
.content-panel,
.preview-panel,
.admin-panel {
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    background: var(--surface-strong);
}

.hero-panel,
.toolbar,
.status-row,
.content-panel,
.preview-panel,
.admin-panel {
    padding: 20px;
}

.hero-panel {
    background: linear-gradient(135deg, rgba(255, 140, 76, 0.14), rgba(255, 233, 207, 0.96));
}

.hero-panel h2 {
    max-width: 760px;
    font-size: clamp(1.7rem, 3vw, 2.8rem);
}

.hero-actions,
.toolbar-controls,
.dialog-actions,
.quick-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.primary-btn,
.secondary-btn,
.ghost-btn,
.danger-btn {
    border: 0;
    border-radius: 999px;
    padding: 12px 18px;
    cursor: pointer;
    transition: transform 0.18s ease, opacity 0.18s ease, background 0.18s ease;
}

.primary-btn {
    background: var(--accent);
    color: white;
    font-weight: 800;
}

.secondary-btn {
    background: var(--accent-soft);
    color: var(--accent-strong);
    font-weight: 700;
}

.ghost-btn {
    background: transparent;
    border: 1px solid var(--line);
    color: var(--text);
}

.danger-btn {
    background: var(--danger-soft);
    color: var(--danger);
    font-weight: 700;
}

.primary-btn:hover,
.secondary-btn:hover,
.ghost-btn:hover,
.danger-btn:hover,
.item-main:hover,
.shortcut-card:hover,
.nav-link:hover {
    transform: translateY(-1px);
}

.upload-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.home-grid,
.dashboard-grid,
.settings-grid {
    display: grid;
    gap: 18px;
    margin-top: 18px;
}

.home-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.dashboard-grid {
    grid-template-columns: 1.15fr .85fr;
}

.settings-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.compact-card {
    min-height: 100%;
}

.stats-card {
    display: grid;
    gap: 18px;
    padding: 22px;
}

.stats-card strong,
.status-row strong,
.account-card strong {
    display: block;
    margin-top: 6px;
    font-size: 1.7rem;
}

.account-card strong {
    font-size: 1.15rem;
}

.account-card small {
    color: var(--muted);
}

.shortcut-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.shortcut-card {
    text-align: left;
    padding: 16px;
    cursor: pointer;
}

.shortcut-card strong {
    display: block;
    margin-bottom: 6px;
}

.simple-list,
.users-list {
    display: grid;
    gap: 12px;
}

.simple-item,
.user-card {
    border: 1px solid var(--line);
    border-radius: 16px;
    background: white;
    padding: 14px;
}

.simple-item strong {
    display: block;
    margin-bottom: 4px;
}

.toolbar-controls {
    min-width: min(100%, 420px);
}

.breadcrumbs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.crumb {
    border: 0;
    background: transparent;
    color: var(--muted);
    padding: 0;
    cursor: pointer;
}

.crumb.active {
    color: var(--text);
    font-weight: 800;
}

.feedback {
    min-height: 24px;
    color: var(--accent-strong);
    text-align: right;
}

.drive-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 18px;
    margin-top: 18px;
}

.file-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
    margin-top: 18px;
}

.item-card {
    min-height: 255px;
}

.item-card-inner {
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(245, 237, 228, 0.96));
    border: 1px solid var(--line);
    border-radius: 20px;
    padding: 18px;
}

.item-main {
    border: 0;
    background: transparent;
    text-align: left;
    padding: 0;
    width: 100%;
    color: inherit;
    cursor: pointer;
}

.item-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 54px;
    height: 54px;
    border-radius: 18px;
    background: var(--accent-soft);
    font-size: 0.95rem;
    font-weight: 800;
    margin-bottom: 18px;
}

.item-name,
#previewName {
    margin: 10px 0 8px;
    font-size: 1.04rem;
    word-break: break-word;
}

.item-meta,
.preview-empty p {
    margin: 0;
    color: var(--muted);
    line-height: 1.5;
}

.item-actions {
    margin-top: 16px;
}

.item-actions .ghost-btn {
    padding: 9px 12px;
    font-size: 0.88rem;
}

.preview-panel {
    align-self: start;
    position: sticky;
    top: 22px;
}

.preview-content {
    display: grid;
    gap: 14px;
}

.preview-frame {
    min-height: 220px;
    border: 1px dashed var(--line);
    border-radius: 18px;
    background: var(--surface-alt);
    overflow: hidden;
    display: grid;
    place-items: center;
    color: var(--muted);
    text-align: center;
}

.preview-frame iframe,
.preview-frame img,
.preview-frame video,
.preview-frame audio {
    width: 100%;
    height: 100%;
    border: 0;
    object-fit: cover;
}

.empty-state,
.preview-empty {
    padding: 28px 10px 8px;
    text-align: center;
    color: var(--muted);
}

.admin-grid {
    display: grid;
    grid-template-columns: minmax(260px, 340px) 1fr;
    gap: 18px;
    margin-top: 14px;
}

.admin-form,
.admin-users {
    padding: 18px;
}

.role-badge,
.permission-chip,
.ppt-slide-number {
    display: inline-flex;
    align-items: center;
    padding: 5px 10px;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 800;
}

.role-badge,
.ppt-slide-number {
    background: var(--accent-soft);
    color: var(--accent-strong);
}

.permissions-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 10px;
}

.permission-chip {
    background: rgba(217, 108, 45, 0.08);
    color: var(--text);
}

.ppt-preview {
    display: grid;
    gap: 14px;
    width: 100%;
    min-height: 220px;
    padding: 14px;
}

.ppt-slide-list {
    display: grid;
    gap: 12px;
    max-height: 520px;
    overflow: auto;
    padding-right: 4px;
}

.ppt-slide-card {
    border: 1px solid var(--line);
    border-radius: 18px;
    background: white;
    padding: 14px;
    box-shadow: 0 8px 24px rgba(77, 40, 16, 0.06);
}

.ppt-slide-title {
    margin: 0 0 10px;
    font-size: 1rem;
}

.ppt-slide-body {
    display: grid;
    gap: 8px;
}

.ppt-slide-body p {
    margin: 0;
    color: var(--muted);
    line-height: 1.55;
}

.dialog {
    width: min(92vw, 460px);
    border: 0;
    padding: 0;
    border-radius: 26px;
    background: white;
    box-shadow: var(--shadow);
}

.dialog::backdrop {
    background: rgba(20, 10, 3, 0.34);
}

.dialog-modal {
    overflow: hidden;
}

.dialog-header {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 22px 24px 18px;
    border-bottom: 1px solid var(--line);
    background: linear-gradient(135deg, var(--surface-strong) 0%, white 100%);
}

.dialog-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.dialog-icon-folder {
    background: linear-gradient(135deg, var(--accent-soft) 0%, #ffe8d6 100%);
    color: var(--accent-strong);
}

.dialog-titles {
    flex: 1;
    min-width: 0;
}

.dialog-label {
    display: block;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: var(--accent);
    margin-bottom: 2px;
}

.dialog-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    margin: 0;
    line-height: 1.3;
}

.dialog-close {
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--muted);
    transition: all 0.15s ease;
    flex-shrink: 0;
}

.dialog-close:hover {
    background: var(--surface-alt);
    color: var(--text);
}

.dialog-content {
    padding: 22px 24px;
}

.dialog-description {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.6;
    margin: 0 0 18px;
}

.dialog-examples {
    background: var(--surface-alt);
    padding: 2px 8px;
    border-radius: 6px;
    font-weight: 500;
    color: var(--text);
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 14px;
    color: var(--muted);
    pointer-events: none;
}

.input-wrapper input {
    padding-left: 44px !important;
}

.input-wrapper input:focus {
    border-color: var(--accent) !important;
    box-shadow: 0 0 0 3px var(--accent-soft);
    outline: none;
}

.dialog-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 16px 24px;
    background: var(--surface-alt);
    border-top: 1px solid var(--line);
}

.dialog-actions .ghost-btn,
.dialog-actions .primary-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 20px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.15s ease;
    border: none;
}

.dialog-actions .primary-btn {
    background: var(--accent);
    color: white;
}

.dialog-actions .primary-btn:hover {
    background: var(--accent-strong);
}

.dialog-actions .ghost-btn {
    background: transparent;
    color: var(--muted);
    border: 1px solid var(--line);
}

.dialog-actions .ghost-btn:hover {
    background: white;
    color: var(--text);
    border-color: var(--muted);
}

@media (max-width: 480px) {
    .dialog-header {
        padding: 18px 18px 14px;
    }
    .dialog-content {
        padding: 18px 18px 14px;
    }
    .dialog-actions {
        padding: 14px 18px 18px;
        flex-direction: column-reverse;
    }
    .dialog-actions .ghost-btn,
    .dialog-actions .primary-btn {
        width: 100%;
    }
}

@media (max-width: 1180px) {
    .app-layout,
    .drive-layout,
    .dashboard-grid,
    .home-grid,
    .settings-grid,
    .admin-grid,
    .shortcut-grid {
        grid-template-columns: 1fr;
    }

    .preview-panel {
        position: static;
    }

    .shared-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 900px) {
    .app-layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        min-height: auto;
    }

    .topbar,
    .hero-panel,
    .toolbar,
    .status-row,
    .panel-header,
    .preview-actions,
    .item-actions,
    .hero-actions,
    .toolbar-controls,
    .quick-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .item-actions .ghost-btn,
    .preview-actions button,
    .quick-actions button,
    .full-btn {
        width: 100%;
    }
}

.dialog textarea {
    width: 100%;
    border: 1px solid var(--line);
    background: white;
    border-radius: 14px;
    padding: 13px 14px;
    color: var(--text);
    resize: vertical;
}

.share-info,
.share-result {
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: var(--surface-alt);
    padding: 14px;
}

.share-info-card,
.share-result-card {
    display: grid;
    gap: 10px;
}

.share-links {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}

.share-output {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 10px 12px;
    background: white;
}

.settings-grid-extended {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.settings-form-card {
    grid-column: span 1;
}

.toggle-row {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text);
    font-weight: 700;
}

.user-actions {
    margin-top: 12px;
}

.user-card .role-badge {
    text-transform: capitalize;
}

.shared-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
    margin-top: 18px;
}

.shared-browser-panel,
#trashView .content-panel {
    margin-top: 18px;
}

#sharedBreadcrumbs {
    margin: 12px 0 18px;
}

#sharedFileGrid .item-card,
#trashList .user-card,
#sharedIncomingList .user-card,
#sharedOwnedList .user-card {
    min-height: auto;
}

.item-actions,
.user-actions,
.share-links {
    justify-content: center;
    flex-wrap: wrap;
}

.item-card .item-actions,
.user-card .user-actions {
    width: 100%;
}

.item-card .item-actions .ghost-btn,
.user-card .user-actions .ghost-btn,
.user-card .user-actions .danger-btn {
    min-width: 110px;
    text-align: center;
}

.item-card-top {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.item-card-top .item-main {
    flex: 1;
}

.item-menu-wrap {
    position: relative;
    flex-shrink: 0;
}

.item-menu-toggle {
    min-width: 42px;
    padding: 10px 12px;
    font-weight: 800;
    line-height: 1;
}

.item-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 170px;
    display: grid;
    gap: 4px;
    padding: 8px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: white;
    box-shadow: 0 18px 36px rgba(77, 40, 16, 0.16);
    z-index: 20;
}

.item-menu-action {
    border: 0;
    background: transparent;
    border-radius: 12px;
    padding: 10px 12px;
    text-align: left;
    cursor: pointer;
    color: var(--text);
}

.item-menu-action:hover {
    background: var(--accent-soft);
    color: var(--accent-strong);
}

.drive-layout {
    grid-template-columns: 260px minmax(0, 1fr) 320px;
}

.drive-tree-panel {
    align-self: start;
    position: sticky;
    top: 22px;
}

.tree-list {
    display: grid;
    gap: 6px;
    margin-top: 12px;
}

.tree-link {
    width: 100%;
    text-align: left;
    border: 0;
    background: transparent;
    color: var(--text);
    padding: 10px 12px;
    border-radius: 12px;
    cursor: pointer;
}

.tree-link:hover,
.tree-link.active {
    background: var(--accent-soft);
    color: var(--accent-strong);
}

.bulk-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 18px;
    padding: 14px 18px;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: var(--surface-alt);
}

.drive-drop-zone.drag-over {
    border-color: rgba(217, 108, 45, 0.5);
    background: linear-gradient(135deg, rgba(255, 140, 76, 0.12), rgba(255, 233, 207, 0.96));
}

.item-check-wrap {
    display: inline-flex;
    align-items: flex-start;
    padding-top: 4px;
}

.item-check {
    width: 18px;
    height: 18px;
}

.item-card.selected .item-card-inner {
    border-color: rgba(217, 108, 45, 0.45);
    box-shadow: 0 0 0 2px rgba(217, 108, 45, 0.14);
}

.item-card.drag-target .item-card-inner,
.tree-link.drag-target {
    border-color: rgba(217, 108, 45, 0.55);
    background: var(--accent-soft);
    color: var(--accent-strong);
}