:root {
    --primary-text: #1a1a1a;
    --secondary-text: #333;
    --subtle-text: #666;
    --muted-text: #888;
    --accent-blue: #007acc;
    --accent-red: #ff6b6b;
    --accent-green: #51cf66;
    --accent-orange: #ff922b;
    --accent-teal: #469FE0;
    --accent-purple: #845ec2;
    --bg-primary: #FDF8F0;
    --bg-secondary: #FEFDFA;
    --shadow-subtle: 0 4px 20px rgba(0,0,0,0.05);
    --border-light: 1px solid #f0f0f0;
    --border-medium: 1px solid #e8e8e8;
    --font-primary: 'DM Sans', system-ui, -apple-system, sans-serif;
    --font-display: 'Bricolage Grotesque', system-ui, sans-serif;
    --font-body: 'Public Sans', system-ui, sans-serif;
    --font-mono: 'Archivo', monospace;
    --font-button: 'Inter', system-ui, sans-serif;
    --radius-lg: 12px;
}

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

body {
    font-family: var(--font-primary);
    background: var(--bg-primary);
    color: var(--primary-text);
    line-height: 1.6;
}

/* Login Screen */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.login-box {
    background: white;
    padding: 3rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-subtle);
    width: 100%;
    max-width: 400px;
}

.login-box h1 {
    font-family: var(--font-display);
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--primary-text);
}

.login-subtitle {
    color: var(--subtle-text);
    margin-bottom: 2rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--secondary-text);
}

.form-group input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: var(--border-medium);
    border-radius: 8px;
    font-size: 0.95rem;
    font-family: var(--font-body);
    transition: border-color 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-teal);
}

form .btn-primary {
    width: 100%;
}

.error-message {
    color: var(--accent-red);
    font-size: 0.9rem;
    margin-top: 1rem;
    display: none;
}

.error-message.show {
    display: block;
}

/* Buttons */
.btn-primary, .btn-secondary {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-family: var(--font-button);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--accent-teal);
    color: white;
    justify-content: center;
}

.btn-primary:hover {
    background: var(--accent-blue);
}

.btn-gradient {
    background: linear-gradient(135deg, #4A90E2 0%, #E74C3C 100%);
    color: white;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05), 0 0 0 1px rgba(74, 144, 226, 0.1);
}

.btn-gradient:hover {
    background: linear-gradient(135deg, #3a7bc8 0%, #d43f33 100%);
    transform: translateY(-1px);
    box-shadow: 0 6px 24px rgba(0,0,0,0.08), 0 0 0 1px rgba(74, 144, 226, 0.2);
}

.btn-secondary {
    background: white;
    color: var(--subtle-text);
    border: var(--border-medium);
}

.btn-secondary:hover {
    background: var(--bg-primary);
}

/* Main App */
.app-container {
    padding: 2rem;
}

.browser-container {
    max-width: 1400px;
    margin: 0 auto;
}

.browser-header {
    margin-bottom: 2rem;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.browser-header h1 {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 600;
    color: var(--primary-text);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--subtle-text);
    margin-top: 0.5rem;
}

.browser-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    gap: 1rem;
}

.search-box {
    flex: 1;
    max-width: 400px;
    position: relative;
}

.search-box input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    border: var(--border-medium);
    border-radius: 8px;
    font-size: 0.9rem;
    font-family: var(--font-body);
    background: white;
    transition: border-color 0.2s;
}

.search-box input:focus {
    outline: none;
    border-color: var(--accent-teal);
}

.search-icon {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--muted-text);
    pointer-events: none;
}

.upload-controls {
    display: flex;
    gap: 1rem;
}

/* Upload Progress */
.upload-progress {
    background: white;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    border: var(--border-medium);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-primary);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-fill {
    height: 100%;
    background: var(--accent-teal);
    transition: width 0.3s;
    width: 0%;
}

.progress-text {
    font-size: 0.85rem;
    color: var(--subtle-text);
}

/* File Table */
.file-table-container {
    background: white;
    border-radius: var(--radius-lg);
    border: var(--border-light);
    box-shadow: var(--shadow-subtle);
    overflow: hidden;
}

.file-table {
    width: 100%;
    border-collapse: collapse;
}

.file-table thead {
    background: var(--bg-primary);
    border-bottom: var(--border-medium);
}

.file-table th {
    padding: 1rem 1.5rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--subtle-text);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-family: var(--font-body);
}

.file-table th.sortable {
    cursor: pointer;
    user-select: none;
    transition: color 0.2s;
}

.file-table th.sortable:hover {
    color: var(--accent-teal);
}

.file-table tbody tr {
    border-bottom: var(--border-light);
    transition: background 0.2s;
}

.file-table tbody tr:hover {
    background: var(--bg-primary);
}

.file-table td {
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
}

.file-name {
    color: var(--primary-text);
    font-weight: 500;
}

.file-type-badge {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.badge-video {
    background: rgba(245, 87, 108, 0.1);
    color: #f5576c;
}

.badge-audio {
    background: rgba(0, 242, 254, 0.1);
    color: #00a8cc;
}

.badge-image {
    background: rgba(56, 249, 215, 0.1);
    color: #00b894;
}

.badge-document {
    background: rgba(118, 75, 162, 0.1);
    color: #764ba2;
}

.file-size {
    color: var(--muted-text);
    font-size: 0.85rem;
}

.file-date {
    color: var(--subtle-text);
    font-size: 0.85rem;
}

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

.btn-action {
    background: none;
    border: none;
    padding: 0.25rem;
    cursor: pointer;
    color: var(--muted-text);
    transition: color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-action:hover {
    color: var(--accent-teal);
}

.btn-action.delete:hover {
    color: var(--accent-red);
}

.btn-delete {
    background: rgba(255, 107, 107, 0.1);
    color: var(--accent-red);
}

.btn-delete:hover {
    background: var(--accent-red);
    color: white;
}

.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--muted-text);
}

/* Stats bar */
.stats-bar {
    display: flex;
    gap: 2rem;
    padding: 1rem 1.5rem;
    background: var(--bg-primary);
    border-top: var(--border-light);
    font-size: 0.85rem;
    color: var(--subtle-text);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.stat-value {
    font-weight: 600;
    color: var(--primary-text);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 600px;
}

.modal-header {
    padding: 1.5rem;
    border-bottom: var(--border-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-family: var(--font-display);
    font-size: 1.5rem;
}

.modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--muted-text);
    cursor: pointer;
    line-height: 1;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.modal-body {
    padding: 2rem;
}

/* Responsive */
@media (max-width: 768px) {
    .browser-controls {
        flex-direction: column;
        align-items: stretch;
    }

    .search-box {
        max-width: 100%;
    }

    .file-table th,
    .file-table td {
        padding: 0.75rem;
    }

    .stats-bar {
        flex-direction: column;
        gap: 0.5rem;
    }
}