:root {
    --primary: #364153;
    --primary-light: #202732;
    --primary-dark: #364153;
    --secondary: #64748b;
    --secondary-light: #94a3b8;
    --success: #10b981;
    --success-light: #34d399;
    --danger: #ef4444;
    --danger-light: #f87171;
    --warning: #f59e0b;
    --warning-light: #fbbf24;
    --info: #0ea5e9;
    --info-light: #38bdf8;
    --light: #f8fafc;
    --dark: #1e293b;
    --body-bg: #ffffff;
    --body-color: #334155;
    --heading-color: #1e293b;
    --link-color: #3b82f6;
    --link-hover-color: #0b65ff;
    --border-color: #e2e8f0;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --card-bg: #ffffff;
    --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    --gradient-link: linear-gradient(135deg, var(--link-color) 0%, var(--link-hover-color) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-light) 100%);
    --gradient-success: linear-gradient(135deg, var(--success) 0%, var(--success-light) 100%);
    --gradient-danger: linear-gradient(135deg, var(--danger) 0%, var(--danger-light) 100%);
    --gradient-warning: linear-gradient(135deg, var(--warning) 0%, var(--warning-light) 100%);
    --gradient-info: linear-gradient(135deg, var(--info) 0%, var(--info-light) 100%);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.1);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --font-family-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-family-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    --font-size-base: 1rem;
    --line-height-base: 1.6;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-bold: 700;
    --spacing-base: 1rem;
    --border-radius-sm: 0.25rem;
    --border-radius: 0.5rem;
    --border-radius-md: 0.15rem;
    --border-radius-lg: 1rem;
    --border-radius-xl: 1.5rem;
    --border-radius-full: 9999px;
    --container-max-width: 1200px;
    --transition-base: all 0.2s ease-in-out;
    --transition-slow: all 0.3s ease-in-out
}

:root {
    color-scheme: light;
    --color-mode: 'light'
}

@media (prefers-color-scheme:dark) {
    :root {
        --color-mode: 'dark'
    }
}

:root[color-scheme=dark] {
    --primary: #13181f;
    --primary-light: #13181f;
    --primary-dark: #cbe0ff;
    --body-bg: #0f172a;
    --body-color: #e2e8f0;
    --heading-color: #f8fafc;
    --border-color: #334155;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --card-bg: #1e293b;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.2);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.2)
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box
}

html {
    font-size: 16px;
    scroll-behavior: smooth
}

body {
    font-family: var(--font-family-sans);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--body-color);
    background-color: var(--body-bg);
    padding: var(--spacing-base);
    max-width: var(--container-max-width);
    margin: 0 auto;
    transition: var(--transition-slow)
}

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--heading-color);
    margin-bottom: var(--spacing-base);
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    letter-spacing: -.025em
}

h1 {
    font-size: 2.75rem;
    margin-top: 2rem;
    background: var(--heading-color);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent
}

h2 {
    font-size: 2.25rem;
    margin-top: 1.75rem;
    position: relative
}

h2::after {
    content: "";
    position: absolute;
    bottom: -.5rem;
    left: 0;
    width: 3rem;
    height: .15rem;
    background: var(--gradient-primary);
    border-radius: var(--border-radius-full)
}

h3 {
    font-size: 1.75rem;
    margin-top: 1.5rem
}

h4 {
    font-size: 1.5rem;
    margin-top: 1.25rem
}

h5 {
    font-size: 1.25rem;
    margin-top: 1rem
}

h6 {
    font-size: 1rem;
    margin-top: .75rem;
    text-transform: uppercase;
    letter-spacing: .05em
}

p {
    margin-bottom: var(--spacing-base)
}

a {
    color: var(--link-color);
    text-decoration: none;
    transition: var(--transition-base);
    position: relative
}

a:hover {
    color: var(--link-hover-color)
}

a:not(nav a):before {
    content: '';
    position: absolute;
    width: 100%;
    transform: scaleX(0);
    height: 2px;
    bottom: -2px;
    left: 0;
    background: var(--gradient-link);
    transform-origin: bottom right;
    transition: transform .3s ease-out
}

a:not(nav a):hover:before {
    transform: scaleX(1);
    transform-origin: bottom left
}

a[target="_blank"]:after {
    content: "[+]";
    display: inline-block;
    margin-left: .25em;
    font-size: .6em;
    font-weight: 700;
    text-decoration: none;
    vertical-align: super
}

small {
    font-size: .875rem;
    opacity: .85
}

code,
pre {
    font-family: var(--font-family-mono);
    border-radius: var(--border-radius)
}

code {
    padding: .2em .4em;
    font-size: .875em;
    background-color: rgba(0, 0, 0, .05)
}

:root[color-scheme=dark] code {
    background-color: rgba(255, 255, 255, .1)
}

pre {
    padding: var(--spacing-base);
    margin-bottom: var(--spacing-base);
    overflow-x: auto;
    background-color: rgba(0, 0, 0, .03);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm)
}

:root[color-scheme=dark] pre {
    background-color: rgba(255, 255, 255, .05)
}

pre code {
    display: block;
    background-color: transparent
}

blockquote {
    border-left: 4px solid var(--primary);
    padding: var(--spacing-base);
    margin-bottom: var(--spacing-base);
    font-style: italic;
    background-color: rgba(0, 0, 0, .02);
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    box-shadow: var(--shadow-sm)
}

:root[color-scheme=dark] blockquote {
    background-color: rgba(255, 255, 255, .03)
}

hr {
    border: 0;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--border-color), transparent);
    margin: calc(var(--spacing-base) * 2) 0
}

ol,
ul {
    margin-bottom: var(--spacing-base);
    padding-left: 1.5rem
}

li {
    margin-bottom: calc(var(--spacing-base) * .5)
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin-bottom: var(--spacing-base);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow)
}

td,
th {
    padding: calc(var(--spacing-base) * .75);
    border-bottom: 1px solid var(--border-color);
    text-align: left
}

thead {
    background: var(--gradient-secondary)
}

th {
    font-weight: var(--font-weight-bold);
    color: #fff;
    text-transform: uppercase;
    font-size: .875rem;
    letter-spacing: .05em
}

tr:last-child td {
    border-bottom: none
}

tr:hover td {
    background-color: rgba(0, 0, 0, .02)
}

:root[color-scheme=dark] tr:hover td {
    background-color: rgba(255, 255, 255, .03)
}

button,
input,
select,
textarea {
    font-family: inherit;
    font-size: inherit;
    line-height: inherit
}

input[type=date],
input[type=datetime-local],
input[type=email],
input[type=month],
input[type=number],
input[type=password],
input[type=search],
input[type=tel],
input[type=text],
input[type=time],
input[type=url],
input[type=week],
select,
textarea {
    display: block;
    width: 100%;
    padding: calc(var(--spacing-base) * .75);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    background-color: var(--body-bg);
    color: var(--body-color);
    margin-bottom: var(--spacing-base);
    transition: var(--transition-base);
    box-shadow: var(--shadow-sm)
}

input:focus,
select:focus,
textarea:focus {
    outline: 0;
    border-color: var(--border-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, .25)
}

select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    padding-right: 2.5rem;
    background-image: url("data:image/svg+xml;utf8,<svg fill='%23364153' height='16' viewBox='0 0 24 24' width='16' xmlns='http://www.w3.org/2000/svg'><path d='M7 10l5 5 5-5z'/></svg>");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 2rem
}

:root[color-scheme=dark] select {
    background-image: url("data:image/svg+xml;utf8,<svg fill='%23e2e8f0' height='16' viewBox='0 0 24 24' width='16' xmlns='http://www.w3.org/2000/svg'><path d='M7 10l5 5 5-5z'/></svg>")
}

textarea {
    min-height: 9rem;
    resize: vertical
}

label {
    display: block;
    margin-bottom: calc(var(--spacing-base) * .5);
    font-weight: var(--font-weight-medium)
}

button,
input[type=button],
input[type=reset],
input[type=submit] {
    min-width: 100px;
    display: inline-block;
    padding: calc(var(--spacing-base) * .75) var(--spacing-base);
    background: var(--gradient-primary);
    color: #fff;
    border: none;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    font-weight: var(--font-weight-medium);
    text-align: center;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden
}

button::after,
input[type=button]::after,
input[type=reset]::after,
input[type=submit]::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0);
    transition: var(--transition-base)
}

button:hover::after,
input[type=button]:hover::after,
input[type=reset]:hover::after,
input[type=submit]:hover::after {
    background-color: rgba(255, 255, 255, .1)
}

button:hover,
input[type=button]:hover,
input[type=reset]:hover,
input[type=submit]:hover {
    box-shadow: var(--shadow-md)
}

button:active,
input[type=button]:active,
input[type=reset]:active,
input[type=submit]:active {
    transform: translateY(2px);
    box-shadow: var(--shadow-sm)
}

button:disabled,
input[type=button]:disabled,
input[type=reset]:disabled,
input[type=submit]:disabled {
    background: var(--gradient-secondary);
    cursor: not-allowed;
    opacity: .7;
    transform: none
}

button.success,
input[type=button].success,
input[type=submit].success {
    background: var(--gradient-success)
}

button.danger,
input[type=button].danger,
input[type=submit].danger {
    background: var(--gradient-danger)
}

button.warning,
input[type=button].warning,
input[type=submit].warning {
    background: var(--gradient-warning)
}

button.info,
input[type=button].info,
input[type=submit].info {
    background: var(--gradient-info)
}

button.outline,
input[type=button].outline,
input[type=submit].outline {
    background: 0 0;
    border: 1px solid var(--primary-dark);
    color: var(--primary-dark)
}

button.outline:hover,
input[type=button].outline:hover,
input[type=submit].outline:hover {
    background-color: var(--primary);
    color: #fff
}

img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius-md);
    transition: var(--transition-base);
    box-shadow: var(--shadow)
}

img:hover {
    transform: scale(1.01);
    box-shadow: var(--shadow-md)
}

figure {
    text-align: center;
    margin-bottom: var(--spacing-base)
}

figcaption {
    font-size: .875rem;
    color: var(--secondary);
    text-align: center;
    margin-top: calc(var(--spacing-base) * .5);
    font-style: italic
}

details summary {
    cursor: pointer;
    position: relative;
    padding-bottom: calc(var(--spacing-base) * .5)
}

details summary::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(to right, var(--border-color), transparent)
}

details>:not(summary) {
    cursor: auto;
    margin-top: calc(var(--spacing-base) * .5)
}

article,
aside,
section {
    margin-bottom: calc(var(--spacing-base) * 2);
    padding: var(--spacing-base);
    background-color: var(--card-bg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition-base);
    border: 1px solid var(--border-color)
}

article:hover,
aside:hover,
section:hover {
    box-shadow: var(--shadow-md)
}

:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px
}

::-webkit-scrollbar {
    width: 10px;
    height: 10px
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, .05);
    border-radius: var(--border-radius-full)
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-secondary);
    border-radius: var(--border-radius-full)
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gradient-primary)
}

.glass {
    background: rgba(255, 255, 255, .5);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, .2);
    color: var(--body-color);
    box-shadow: 0 4px 6px rgba(0, 0, 0, .1)
}

:root[color-scheme=dark] .glass {
    background: rgba(0, 0, 0, .3);
    border: 1px solid rgba(255, 255, 255, .1)
}

:root:not([color-scheme=dark]) .glass {
    text-shadow: 0 1px 1px rgba(0, 0, 0, .1)
}

@media (max-width:768px) {
    html {
        font-size: 14px
    }

    body {
        padding: calc(var(--spacing-base) * .75)
    }

    table {
        width: 100%;
        display: block;
        overflow-x: auto
    }

    h1 {
        font-size: 2.25rem
    }

    h2 {
        font-size: 1.75rem
    }
}

@media print {
    body {
        background-color: #fff;
        color: #000
    }

    a {
        text-decoration: underline;
        color: #000
    }

    a[href]:after {
        content: " (" attr(href) ")"
    }

    blockquote,
    pre {
        border: 1px solid #999;
        page-break-inside: avoid
    }

    thead {
        background: var(--gradient-secondary);
        display: table-header-group
    }

    img,
    tr {
        page-break-inside: avoid
    }

    h2,
    h3,
    p {
        orphans: 3;
        widows: 3
    }

    h2,
    h3 {
        page-break-after: avoid
    }

    button,
    h1,
    h2::after,
    input[type=button],
    input[type=reset],
    input[type=submit] {
        background: 0 0 !important;
        -webkit-text-fill-color: #000;
        text-fill-color: #000;
        box-shadow: none !important
    }

    article,
    aside,
    blockquote,
    img,
    pre,
    section,
    table {
        box-shadow: none !important
    }
}

a,
article,
aside,
blockquote,
body,
button,
code,
input,
pre,
section,
select,
td,
textarea,
th {
    transition: background-color .3s ease, color .3s ease, border-color .3s ease, box-shadow .3s ease
}

@keyframes colorSchemeTransition {
    0% {
        opacity: 0
    }

    100% {
        opacity: 1
    }
}

body {
    animation: colorSchemeTransition .5s ease-out
}

/* Auth Forms */
.auth-container {
    max-width: 400px;
    margin: 2rem auto;
    padding: 2rem;
    background: var(--card-bg);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
}

.auth-form .form-group {
    margin-bottom: 1.5rem;
}

.auth-links {
    margin-top: 1.5rem;
    text-align: center;
}

/* File Browser */
.file-browser {
    background: var(--card-bg);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow);
    padding: 1.5rem;
}

.browser-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.browser-actions {
    display: flex;
    gap: 0.5rem;
}

.path-nav {
    background: var(--body-bg);
    padding: 0.75rem;
    border-radius: var(--border-radius);
    margin-bottom: 1.5rem;
    font-family: var(--font-family-mono);
    font-size: 0.9rem;
    overflow-x: auto;
    white-space: nowrap;
}

.path-item {
    color: var(--link-color);
    text-decoration: none;
}

.path-separator {
    margin: 0 0.5rem;
    color: var(--secondary);
}

.files-container {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.folder-section,
.file-section {
    width: 100%;
}

.files-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.file-item {
    position: relative;
    background: var(--body-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    padding: 1rem;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    flex-direction: column;
    height: 150px;
}

.file-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.file-item.folder {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.file-item .file-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--body-color);
    flex: 1;
}

.file-icon,
.file-preview {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    text-align: center;
}

.file-name {
    font-size: 0.9rem;
    font-weight: var(--font-weight-medium);
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    width: 100%;
}

.file-details {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.file-meta {
    display: flex;
    justify-content: center;
    gap: 1rem;
    font-size: 0.75rem;
    color: var(--secondary);
    margin-top: 0.5rem;
}

.file-actions {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    display: none;
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 0.25rem;
    box-shadow: var(--shadow);
}

.file-item:hover .file-actions {
    display: flex;
    gap: 0.5rem;
}

.action-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    padding: 0.25rem;
    border-radius: var(--border-radius-sm);
    transition: background-color 0.2s;
}

.action-btn:hover {
    background: rgba(0, 0, 0, 0.05);
}

.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--secondary);
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* Dashboard */
.dashboard {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.stat-card {
    display: flex;
    align-items: center;
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow);
}

.stat-icon {
    font-size: 2.5rem;
    margin-right: 1.5rem;
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: 0.25rem;
}

.stat-label {
    color: var(--secondary);
    font-size: 0.9rem;
}

.dashboard-recent {
    background: var(--card-bg);
    border-radius: var(--border-radius-md);
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.recent-files-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1rem;
}

.recent-files-list .file-item {
    height: auto;
    flex-direction: row;
    align-items: center;
    padding: 0.75rem;
}

.recent-files-list .file-icon {
    margin-bottom: 0;
    margin-right: 1rem;
    font-size: 1.75rem;
}

.recent-files-list .file-details {
    align-items: flex-start;
}

.recent-files-list .file-name {
    text-align: left;
}

.recent-files-list .file-meta {
    justify-content: flex-start;
}

.dashboard-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

/* Profile */
.profile-container {
    max-width: 600px;
    margin: 2rem auto;
}

.profile-card {
    background: var(--card-bg);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow);
    padding: 2rem;
}

.profile-header {
    display: flex;
    align-items: center;
    margin-bottom: 2rem;
}

.avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    margin-right: 1.5rem;
}

.profile-stats {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
}

.profile-actions {
    display: flex;
    gap: 1rem;
}

/* Improved Navigation Bar */
header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--card-bg);
    box-shadow: var(--shadow);
    padding: 0;
    transition: transform 0.3s ease;
}

header.hidden {
    transform: translateY(-100%);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: var(--container-max-width);
    margin: 0 auto;
}

nav .logo h1 {
    margin: 0;
    font-size: 1.5rem;
}

nav .logo a {
    text-decoration: none;
    color: var(--heading-color);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 1.5rem;
    align-items: center;
    margin: 0;
    padding: 0;
}

nav ul li a {
    text-decoration: none;
    color: var(--body-color);
    font-weight: var(--font-weight-medium);
    transition: color 0.2s;
}

nav ul li a:hover {
    color: var(--link-color);
}

.toggle-button {
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    border-radius: 90%;
    padding: 0;
    background: var(--body-bg);
    color: var(--body-color);
    font-size: 1rem;
}

/* Improved Flash Messages */
.alerts {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-width: 300px;
}

.alert {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 1rem;
    box-shadow: var(--shadow-md);
    color: var(--body-color);
    position: relative;
    animation: alertIn 0.3s ease forwards, alertOut 0.3s ease 5s forwards;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.alert.success {
    border-left: 4px solid var(--success);
}

.alert.error {
    border-left: 4px solid var(--danger);
}

.alert.info {
    border-left: 4px solid var(--info);
}

.alert.warning {
    border-left: 4px solid var(--warning);
}

.alert .close {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.25rem;
    margin-left: 0.5rem;
    opacity: 0;
    transition: opacity 0.2s;
}

.alert:hover .close {
    opacity: 1;
}

@keyframes alertIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }

    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes alertOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }

    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

/* For mobile responsiveness */
@media (max-width: 768px) {
    nav {
        flex-direction: column;
        padding: 1rem;
    }

    nav ul {
        flex-direction: column;
        width: 100%;
        margin-top: 1rem;
    }

    .stat-card {
        padding: 1rem;
    }

    .stat-icon {
        font-size: 2rem;
        margin-right: 1rem;
    }

    .files-list {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    }

    .file-item {
        height: 120px;
    }

    .avatar {
        margin-right: 0;
        margin-bottom: 1rem;
    }
}

/* Upload Overlay */
.upload-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1050;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.upload-overlay.active {
    opacity: 1;
    visibility: visible;
}

.upload-modal {
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    background-color: var(--card-bg);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

.upload-overlay.active .upload-modal {
    transform: translateY(0);
}

.upload-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.upload-header h3 {
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.close-upload {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--body-color);
    opacity: 0.7;
    transition: opacity 0.2s;
}

.close-upload:hover {
    opacity: 1;
}

.upload-body {
    padding: 1.5rem;
    overflow-y: auto;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.upload-dropzone {
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    transition: border-color 0.2s, background-color 0.2s;
    cursor: pointer;
}

.upload-dropzone.drag-over {
    border-color: var(--primary-color);
    background-color: rgba(59, 130, 246, 0.05);
}

.upload-icon {
    font-size: 3rem;
    color: var(--secondary);
    margin-bottom: 1rem;
}

.upload-dropzone p {
    margin: 0.5rem 0;
    color: var(--body-color);
}

.upload-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
}

.upload-list {
    background-color: var(--body-bg);
    border-radius: var(--border-radius);
    padding: 1rem;
}

.upload-list h4 {
    margin: 0 0 1rem 0;
    font-size: 1rem;
    color: var(--body-color);
}

.upload-items {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-height: 200px;
    overflow-y: auto;
}

.upload-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.upload-item-icon {
    font-size: 1.25rem;
    color: var(--secondary);
}

.upload-item-details {
    flex: 1;
}

.upload-item-name {
    font-size: 0.9rem;
    font-weight: var(--font-weight-medium);
    color: var(--body-color);
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.upload-item-size {
    font-size: 0.75rem;
    color: var(--secondary);
}

.upload-item-progress {
    width: 100%;
    height: 4px;
    background-color: var(--border-color);
    border-radius: var(--border-radius-full);
    margin-top: 0.5rem;
    overflow: hidden;
}

.upload-item-progress-bar {
    height: 100%;
    background-color: var(--primary-color);
    width: 0%;
    transition: width 0.2s;
}

.upload-progress-overall {
    margin-top: auto;
}

.progress-label {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    color: var(--body-color);
}

.progress-bar-container {
    height: 8px;
    background-color: var(--border-color);
    border-radius: var(--border-radius-full);
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background-color: var(--primary-color);
    width: 0%;
    transition: width 0.3s;
}

.upload-footer {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
}

/* Upload Status Indicators */
.upload-item.uploading .upload-item-icon {
    color: var(--info);
}

.upload-item.success .upload-item-icon {
    color: var(--success);
}

.upload-item.error .upload-item-icon {
    color: var(--danger);
}