/* ============================================
   UploadMedia — Layout
   Navbar, Sidebar, Grid, Responsive
   ============================================ */

/* ── App Shell ── */
.app {
    display: flex;
    min-height: 100vh;
}

.app-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.page {
    flex: 1;
    padding: var(--space-6);
    max-width: var(--content-max-width);
    width: 100%;
    margin: 0 auto;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-8);
    flex-wrap: wrap;
    gap: var(--space-4);
}

.page-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
}

/* ── Navbar ── */
.navbar {
    height: var(--navbar-height);
    background: var(--color-bg-glass);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-6);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
}

.navbar-brand-icon {
    width: 32px;
    height: 32px;
    background: var(--gradient-accent);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.navbar-user:hover {
    background: rgba(148, 163, 184, 0.1);
}

.navbar-username {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
}

.navbar-role {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.navbar-hamburger {
    display: none;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    cursor: pointer;
}

.navbar-hamburger:hover {
    background: rgba(148, 163, 184, 0.1);
}

/* ── Sidebar ── */
.sidebar {
    width: var(--sidebar-width);
    background: var(--color-bg-secondary);
    border-right: var(--glass-border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--navbar-height);
    bottom: 0;
    left: 0;
    z-index: var(--z-sidebar);
    transition: transform var(--transition-base);
    overflow-y: auto;
}

.sidebar-nav {
    padding: var(--space-4);
    flex: 1;
}

.sidebar-section {
    margin-bottom: var(--space-6);
}

.sidebar-section-title {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-muted);
    padding: var(--space-2) var(--space-3);
    margin-bottom: var(--space-1);
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-lg);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.sidebar-link:hover {
    background: rgba(148, 163, 184, 0.08);
    color: var(--color-text-primary);
}

.sidebar-link.active {
    background: rgba(99, 102, 241, 0.12);
    color: var(--color-text-accent);
}

.sidebar-link i {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.sidebar-footer {
    padding: var(--space-4);
    border-top: var(--glass-border);
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--color-bg-overlay);
    z-index: calc(var(--z-sidebar) - 1);
}

.has-sidebar .app-content {
    margin-left: var(--sidebar-width);
}

/* ── Grid ── */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
}

.grid-auto {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-6);
}

/* ── Auth Layout ── */
.auth-layout {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: var(--space-6);
    background: var(--color-bg-primary);
}

.auth-card {
    width: 100%;
    max-width: 420px;
    animation: fadeInUp var(--transition-slow) ease;
}

.auth-header {
    text-align: center;
    margin-bottom: var(--space-8);
}

.auth-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
}

.auth-logo-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-accent);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: var(--shadow-glow-strong);
}

.auth-logo-text {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.auth-footer {
    text-align: center;
    margin-top: var(--space-6);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.auth-footer a {
    color: var(--color-text-accent);
    font-weight: var(--font-weight-medium);
}

/* ── File/Folder Cards ── */
.file-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.file-icon-image {
    background: rgba(59, 130, 246, 0.15);
    color: #3b82f6;
}

.file-icon-video {
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
}

.file-icon-audio {
    background: rgba(34, 197, 94, 0.15);
    color: #22c55e;
}

.file-icon-document {
    background: rgba(245, 158, 11, 0.15);
    color: #f59e0b;
}

.folder-card {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.folder-card-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.folder-card-icon {
    width: 44px;
    height: 44px;
    background: rgba(99, 102, 241, 0.12);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
}

.folder-card-info {
    flex: 1;
    min-width: 0;
}

.folder-card-name {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.folder-card-meta {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-top: 2px;
}

.folder-card-actions {
    display: flex;
    gap: var(--space-2);
}

/* ── Public Layout ── */
.public-layout {
    min-height: 100vh;
    background: var(--color-bg-primary);
}

.public-header {
    text-align: center;
    padding: var(--space-12) var(--space-6) var(--space-8);
}

.public-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--space-6) var(--space-12);
}

/* ── FAB ── */
.fab {
    display: none;
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    background: var(--gradient-accent);
    color: white;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-xl), var(--shadow-glow-strong);
    z-index: var(--z-dropdown);
    transition: transform var(--transition-spring);
}

.fab:hover {
    transform: scale(1.1);
}

.fab:active {
    transform: scale(0.95);
}

/* ── Responsive: Tablet ≤1024px ── */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }

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

    .sidebar-overlay.active {
        display: block;
    }

    .has-sidebar .app-content {
        margin-left: 0;
    }

    .navbar-hamburger {
        display: flex;
    }

    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ── Responsive: Mobile Landscape ≤768px ── */
@media (max-width: 768px) {
    .page {
        padding: var(--space-4);
    }

    .page-title {
        font-size: var(--font-size-xl);
    }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr 1fr;
    }

    .grid-auto {
        grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    }

    .navbar-username {
        display: none;
    }

    .modal {
        padding: var(--space-6);
        margin: var(--space-4);
    }

    .stat-card .stat-value {
        font-size: var(--font-size-xl);
    }

    .toast-container {
        left: var(--space-4);
    }

    .toast {
        min-width: auto;
    }

    .fab {
        display: flex;
    }
}

/* ── Responsive: Mobile ≤480px ── */
@media (max-width: 480px) {
    :root {
        --navbar-height: 56px;
    }

    .page {
        padding: var(--space-3);
    }

    .page-title {
        font-size: var(--font-size-lg);
    }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

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

    .navbar {
        padding: 0 var(--space-4);
    }

    .card {
        padding: var(--space-4);
        border-radius: var(--radius-lg);
    }

    .upload-zone {
        padding: var(--space-8) var(--space-4);
    }

    .auth-card {
        padding: 0 var(--space-2);
    }

    .modal {
        padding: var(--space-5);
        max-height: 95vh;
    }

    h1 {
        font-size: var(--font-size-2xl);
    }

    h2 {
        font-size: var(--font-size-xl);
    }

    h3 {
        font-size: var(--font-size-lg);
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }
}