:root {
    --bg-dark: #0f111a;
    --panel-bg: rgba(20, 24, 39, 0.6);
    --panel-border: rgba(255, 255, 255, 0.08);
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-color: #6366f1;
    --accent-hover: #4f46e5;
    --accent-glow: rgba(99, 102, 241, 0.4);
    --danger-color: #f43f5e;
    --success-color: #10b981;
    --sidebar-width: 280px;
    --glass-blur: blur(20px);

    --hover-bg: rgba(255, 255, 255, 0.05);
    --active-bg: rgba(99, 102, 241, 0.15);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    overflow: hidden;
    height: 100vh;
    width: 100vw;
}

.block-selection {
    -webkit-user-select: none;
    user-select: none;
}

/* Glassmorphism Utilities */
.glass-panel {
    background: var(--panel-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--panel-border);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    border-radius: 16px;
}

/* View transition */
.view {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.5s ease;
    z-index: 1;
}

.view.active {
    opacity: 1;
    pointer-events: all;
    z-index: 10;
}

/* -----------------------------
   Login Page Styles
------------------------------ */
#login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    background: radial-gradient(circle at center, #1b1e2b 0%, var(--bg-dark) 100%);
}

.login-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('static/bg.png');
    background-size: cover;
    background-position: center;
    z-index: -1;
}

.login-box {
    width: 100%;
    max-width: 420px;
    padding: 3rem 2.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    animation: slideUpFade 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideUpFade {
    0% {
        opacity: 0;
        transform: translateY(40px) scale(0.95);
    }

    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.login-header h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #fff 0%, #a5b4fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.input-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
}

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

.input-wrapper i {
    position: absolute;
    left: 1rem;
    color: var(--text-muted);
}

.input-wrapper input {
    width: 100%;
    padding: 0.875rem 1rem 0.875rem 2.75rem;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.2s;
    outline: none;
}

.input-wrapper input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px var(--accent-glow);
    background: rgba(0, 0, 0, 0.4);
}

.error-msg {
    color: var(--danger-color);
    font-size: 0.85rem;
    margin-top: -0.5rem;
    margin-bottom: 1rem;
    display: none;
    font-weight: 500;
}

.btn-primary {
    width: 100%;
    padding: 0.875rem;
    background: var(--accent-color);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s;
    box-shadow: 0 4px 14px 0 var(--accent-glow);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 var(--accent-glow);
}

.btn-primary:active {
    transform: translateY(0);
}

.login-footer {
    text-align: center;
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 1rem;
    white-space: nowrap;
}

/* -----------------------------
   Dashboard Styles
------------------------------ */
#dashboard-container {
    display: flex;
    background: var(--bg-dark);
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--panel-bg);
    border-right: 1px solid var(--panel-border);
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    z-index: 5;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 2.5rem;
}

.brand i {
    color: var(--accent-color);
    font-size: 1.75rem;
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.2s;
}

.nav-item i {
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
}

.nav-item:hover {
    background: var(--hover-bg);
    color: var(--text-primary);
}

.nav-item.active {
    background: var(--active-bg);
    color: var(--accent-color);
}

.storage-widget {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--panel-border);
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 1.5rem;
}

.storage-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    font-weight: 600;
    font-size: 0.9rem;
}

.progress-bar {
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 0.75rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-color), #818cf8);
    border-radius: 3px;
    transition: width 1s ease-in-out;
}

.storage-text {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.storage-text strong {
    color: var(--text-primary);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--panel-border);
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-color), #c7d2fe);
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: 700;
    color: #fff;
}

.user-details {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.user-name {
    font-weight: 600;
    font-size: 0.95rem;
}

.user-role {
    font-size: 0.75rem;
    color: var(--text-muted);
}

#logout-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.1rem;
    transition: color 0.2s;
    padding: 0.5rem;
}

#logout-btn:hover {
    color: var(--danger-color);
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
    position: relative;
    background: url('static/bg.png') no-repeat center center;
    background-size: cover;
}

/* Overlay for main content to keep it readable over bg */
.main-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 17, 26, 0.85);
    /* dark tint overlay */
    backdrop-filter: blur(10px);
    z-index: 0;
}

/* Keep children above the overlay */
.topbar,
.file-explorer,
#toast-container,
#context-menu,
#upload-modal {
    z-index: 1;
    position: relative;
}


.topbar {
    height: 70px;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--panel-border);
    background: rgba(20, 24, 39, 0.3);
}

.breadcrumbs {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 600;
}

.crumb {
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.2s;
}

.crumb:hover {
    color: var(--text-primary);
}

.crumb.active {
    color: var(--text-primary);
    cursor: default;
}

.crumb-separator {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin: 0 0.25rem;
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.search-bar {
    position: relative;
    width: 280px;
}

.search-bar i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-bar input {
    width: 100%;
    padding: 0.6rem 1rem 0.6rem 2.5rem;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--panel-border);
    border-radius: 20px;
    color: #fff;
    outline: none;
    transition: all 0.2s;
}

.search-bar input:focus {
    background: rgba(0, 0, 0, 0.5);
    border-color: var(--text-muted);
}

/* Upload Button specifically defined */
.upload-btn {
    width: auto;
    padding: 0.6rem 1.25rem;
    border-radius: 20px;
}


/* File Explorer */
.file-explorer {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 1.5rem 2rem;
    overflow-y: auto;
}

.explorer-header {
    display: grid;
    grid-template-columns: 3fr 1.5fr 1fr 50px;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--panel-border);
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.explorer-body {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.file-row {
    display: grid;
    grid-template-columns: 3fr 1.5fr 1fr 50px;
    align-items: center;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.15s;
    border: 1px solid transparent;
}

.file-row:hover {
    background: var(--hover-bg);
}

.file-row.selected {
    background: var(--active-bg);
    border-color: var(--accent-glow);
}

.col-name {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.type-icon {
    font-size: 1.25rem;
    width: 24px;
    text-align: center;
}

.type-icon.folder {
    color: #818cf8;
}

.type-icon.image {
    color: #34d399;
}

.type-icon.doc {
    color: #60a5fa;
}

.type-icon.pdf {
    color: #f87171;
}

.type-icon.video {
    color: #fbbf24;
}

.type-icon.unknown {
    color: var(--text-muted);
}

.col-date,
.col-size {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.col-actions {
    display: flex;
    justify-content: flex-end;
}

.btn-icon {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.btn-icon:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

/* Empty state */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    color: var(--text-muted);
    gap: 1rem;
}

.empty-state i {
    font-size: 4rem;
    opacity: 0.5;
}

.empty-state p {
    font-size: 1.1rem;
}

/* Context Menu */
.context-menu {
    position: fixed;
    background: var(--panel-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    padding: 0.5rem 0;
    min-width: 180px;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5);
    z-index: 100;
    display: none;
    /* hidden by default */
}

.context-menu.active {
    display: block;
    animation: fadeIn 0.15s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

.menu-item {
    padding: 0.6rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-primary);
    transition: background 0.15s;
}

.menu-item:hover {
    background: var(--hover-bg);
}

.menu-item.danger:hover {
    background: rgba(244, 63, 94, 0.15);
    color: var(--danger-color);
}

.menu-item i {
    width: 16px;
    text-align: center;
}

.menu-divider {
    height: 1px;
    background: var(--panel-border);
    margin: 0.25rem 0;
}

/* Upload Modal */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 200;
}

.modal-backdrop.active {
    display: flex;
    animation: fadeIn 0.3s;
}

.modal {
    width: 400px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.modal h3 {
    font-size: 1.25rem;
    border-bottom: 1px solid var(--panel-border);
    padding-bottom: 0.5rem;
}

.upload-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    background: rgba(0, 0, 0, 0.2);
    padding: 1rem;
    border-radius: 8px;
}

.upload-item i {
    font-size: 2rem;
    color: #60a5fa;
    margin-top: 0.25rem;
}

.upload-details {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.upload-name {
    font-size: 0.95rem;
    font-weight: 500;
    word-break: break-all;
}

.upload-status {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Toast System */
#toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    z-index: 999;
}

.toast {
    background: var(--panel-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--panel-border);
    color: var(--text-primary);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transform: translateX(120%);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.toast.show {
    transform: translateX(0);
}

.toast.error i {
    color: var(--danger-color);
}

.toast.success i {
    color: var(--success-color);
}