:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-card: #1a1a1a;
    --bg-hover: #222222;
    --border: #333333;
    --border-light: #444444;
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --text-muted: #888888;
    --accent: #ffffff;
    --accent-light: #f0f0f0;
    --success: #00ff88;
    --error: #ff5555;
    --warning: #ffaa00;
    --info: #4dabf7;
    --admin: #ff6b9d;
    --glow: rgba(255, 255, 255, 0.1);
    --shadow: rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    position: relative;
    overflow-x: hidden;
}

.grid-line {
    position: absolute;
    background: var(--border);
    pointer-events: none;
    opacity: 0.05;
}

.container {
    width: 100%;
    max-width: 480px;
    background: var(--bg-card);
    border-radius: 24px;
    border: 1px solid var(--border);
    overflow: hidden;
    box-shadow:
        0 8px 32px var(--shadow),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
    position: relative;
    z-index: 1;
    animation: containerEntrance 0.6s ease-out;
    margin: auto;
}

@media (min-width: 768px) {
    .container {
        max-width: 800px;
    }
}

@media (min-width: 1024px) {
    .container {
        max-width: 1200px;
    }
}

@keyframes containerEntrance {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

header {
    padding: 40px 30px 25px;
    text-align: center;
    border-bottom: 1px solid var(--border);
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.03), transparent);
}

h1 {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.tagline {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
}

.banner-image {
    width: 100%;
    max-width: 200px;
    height: auto;
    margin-bottom: 20px;
}

main { 
    padding: 30px; 
}

.auth-container {
    width: 100%;
}

.auth-toggle {
    display: flex;
    background: var(--bg-secondary);
    border-radius: 16px;
    padding: 4px;
    margin-bottom: 30px;
    border: 1px solid var(--border);
}

.auth-toggle button {
    flex: 1;
    padding: 14px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.auth-toggle button.active {
    background: var(--accent);
    color: var(--bg-primary);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.auth-form {
    display: none;
    animation: fadeIn 0.3s ease-out;
}

.auth-form.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.form-group {
    margin-bottom: 20px;
}

.input-with-icon {
    position: relative;
}

.input-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    z-index: 2;
    font-size: 1.1rem;
}

input[type="text"],
input[type="password"],
input[type="number"] {
    width: 100%;
    padding: 16px 16px 16px 48px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--accent-light);
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
}

.btn {
    width: 100%;
    padding: 16px;
    background: var(--accent);
    color: var(--bg-primary);
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn:hover {
    background: var(--accent-light);
    color: var(--bg-primary);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    border-color: var(--border-light);
}

.btn-success {
    background: var(--success);
    color: var(--bg-primary);
}

.btn-success:hover {
    background: #00cc6d;
    color: var(--bg-primary);
}

.btn-info {
    background: var(--info);
    color: var(--bg-primary);
}

.btn-info:hover {
    background: #3d8fd6;
    color: var(--bg-primary);
}

.btn-admin {
    background: var(--admin);
    color: var(--bg-primary);
}

.btn-admin:hover {
    background: #e05a87;
    color: var(--bg-primary);
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 20px 0;
    font-size: 0.9rem;
}

.remember-me {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
}

.remember-me input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--accent);
}

.forgot-password {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.forgot-password:hover {
    color: var(--accent);
}

.auth-footer {
    text-align: center;
    margin-top: 25px;
    padding-top: 25px;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.switch-auth {
    color: var(--accent);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 10px;
    padding: 10px 20px;
    background: var(--bg-secondary);
    border-radius: 10px;
    border: 1px solid var(--border);
}

.switch-auth:hover {
    background: var(--bg-hover);
    border-color: var(--accent);
    color: var(--accent);
}

.storage-info {
    text-align: center;
    margin: 20px 0;
    padding: 15px;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.storage-info i {
    color: var(--success);
    margin-right: 8px;
}

.dashboard { 
    display: none; 
    min-height: auto;
}

.admin-badge {
    background: var(--admin);
    color: var(--bg-primary);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-left: 10px;
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.user-info h2 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 5px;
    display: flex;
    align-items: center;
}

.user-stats {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.logout-btn {
    padding: 10px 18px;
    background: transparent;
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.logout-btn:hover {
    background: var(--bg-hover);
    border-color: var(--error);
    color: var(--error);
}

.storage-meter {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 30px;
    border: 1px solid var(--border);
}

.storage-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.storage-label {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.storage-percentage {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent);
}

.meter-bar {
    height: 8px;
    background: var(--bg-primary);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 10px;
}

.meter-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 4px;
    width: 0%;
    transition: width 0.5s ease;
}

.meter-stats {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.upload-section {
    background: var(--bg-secondary);
    border-radius: 16px;
    padding: 25px;
    margin-bottom: 30px;
    border: 2px dashed var(--border);
    transition: all 0.3s ease;
    text-align: center;
}

.upload-section.drag-over {
    border-color: var(--accent);
    background: var(--bg-hover);
}

.upload-icon {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: 15px;
}

.upload-text h3 {
    font-size: 1.2rem;
    margin-bottom: 8px;
    color: var(--accent);
}

.upload-text p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.upload-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    background: var(--accent);
    color: var(--bg-primary);
    border: none;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.upload-btn:hover {
    background: var(--accent-light);
    color: var(--bg-primary);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.file-input {
    display: none;
}

.progress-container {
    margin-top: 20px;
    display: none;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.progress-bar {
    height: 6px;
    background: var(--bg-primary);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--accent);
    width: 0%;
    border-radius: 3px;
    transition: width 0.3s ease;
}

.files-section {
    margin-top: 30px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 15px;
}

.section-header h3 {
    font-size: 1.3rem;
    color: var(--accent);
}

.search-box {
    padding: 10px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 0.9rem;
    min-width: 200px;
    flex-grow: 1;
    max-width: 300px;
}

.files-grid {
    display: grid;
    gap: 15px;
}

.file-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    transition: all 0.3s ease;
}

.file-card:hover {
    background: var(--bg-hover);
    border-color: var(--border-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.file-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 15px;
    flex-wrap: wrap;
    gap: 10px;
}

.file-info h4 {
    font-size: 1rem;
    color: var(--accent-light);
    margin-bottom: 5px;
    word-break: break-all;
}

.file-preview {
    margin-bottom: 10px;
}

.file-preview-img {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: 6px;
    border: 1px solid var(--border);
}

.file-preview-video {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: 6px;
    border: 1px solid var(--border);
}

.file-preview-audio {
    width: 200px;
    height: 30px;
    border-radius: 6px;
    border: 1px solid var(--border);
}

.file-meta {
    display: flex;
    gap: 15px;
    font-size: 0.8rem;
    color: var(--text-muted);
    flex-wrap: wrap;
}

.file-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.action-btn {
    padding: 6px 12px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 5px;
    white-space: nowrap;
}

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

.action-btn.download:hover {
    border-color: var(--success);
    color: var(--success);
}

.action-btn.delete:hover {
    border-color: var(--error);
    color: var(--error);
}

.action-btn.share:hover {
    border-color: var(--info);
    color: var(--info);
}

.action-btn.rename:hover {
    border-color: var(--warning);
    color: var(--warning);
}

.no-files {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
}

.no-files i {
    font-size: 3rem;
    margin-bottom: 15px;
    opacity: 0.5;
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
}

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

.modal {
    background: var(--bg-card);
    border-radius: 16px;
    border: 1px solid var(--border);
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.modal-header {
    padding: 25px 25px 15px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.3rem;
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: 10px;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 5px;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.modal-close:hover {
    background: var(--bg-hover);
    color: var(--accent);
}

.modal-body {
    padding: 25px;
}

.share-link-container {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.share-link-input {
    flex: 1;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--accent);
    font-size: 0.9rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.copy-btn {
    padding: 12px 20px;
    background: var(--accent);
    color: var(--bg-primary);
    border: none;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.copy-btn:hover {
    background: var(--accent-light);
    color: var(--bg-primary);
    transform: translateY(-2px);
}

.share-options {
    margin-top: 20px;
}

.share-option {
    margin-bottom: 15px;
}

.share-option label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.share-option select {
    width: 100%;
    padding: 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--accent);
    font-size: 0.9rem;
}

.modal-actions {
    display: flex;
    gap: 15px;
    margin-top: 25px;
}

.link-type-selector {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 15px;
}

.link-type-btn {
    flex: 1;
    padding: 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    font-size: 0.9rem;
}

.link-type-btn.active {
    background: var(--info);
    color: var(--bg-primary);
    border-color: var(--info);
}

.link-type-btn:hover:not(.active) {
    background: var(--bg-hover);
    color: var(--text-secondary);
    border-color: var(--border-light);
}

.link-info {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 15px;
    margin-bottom: 20px;
    border: 1px solid var(--border);
}

.link-info h4 {
    color: var(--accent);
    margin-bottom: 10px;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.link-info p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 5px;
}

.admin-panel {
    background: var(--bg-secondary);
    border-radius: 16px;
    padding: 25px;
    margin-bottom: 30px;
    border: 1px solid var(--admin);
}

.admin-panel h3 {
    color: var(--admin);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.admin-actions {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.admin-btn {
    padding: 12px 20px;
    background: var(--admin);
    color: var(--bg-primary);
    border: none;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.admin-btn:hover {
    background: #e05a87;
    color: var(--bg-primary);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 157, 0.3);
}

.users-list {
    max-height: 400px;
    overflow-y: auto;
}

.user-row {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 15px;
    transition: all 0.3s ease;
}

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

.user-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 15px;
    flex-wrap: wrap;
    gap: 10px;
}

.user-info h4 {
    font-size: 1rem;
    color: var(--accent);
    margin-bottom: 5px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-meta {
    display: flex;
    gap: 15px;
    font-size: 0.8rem;
    color: var(--text-muted);
    flex-wrap: wrap;
}

.user-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.user-action-btn {
    padding: 6px 12px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 5px;
}

.user-action-btn:hover {
    background: var(--bg-hover);
}

.user-action-btn.view:hover {
    border-color: var(--info);
    color: var(--info);
}

.user-action-btn.edit:hover {
    border-color: var(--admin);
    color: var(--admin);
}

.user-action-btn.reset:hover {
    border-color: var(--warning);
    color: var(--warning);
}

.user-action-btn.delete-user:hover {
    border-color: var(--error);
    color: var(--error);
}

.toast {
    position: fixed;
    top: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(-100px);
    background: var(--bg-card);
    color: var(--accent);
    padding: 16px 28px;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 500;
    z-index: 1000;
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    border: 1px solid var(--border);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    gap: 12px;
    max-width: 90%;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

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

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

.toast.info {
    border-color: var(--info);
}

@media (max-width: 768px) {
    .container {
        max-width: 100%;
        border-radius: 20px;
    }
    
    header {
        padding: 30px 20px 20px;
    }
    
    h1 {
        font-size: 1.8rem;
    }
    
    main {
        padding: 20px;
    }
    
    .dashboard-header {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }
    
    .logout-btn {
        align-self: flex-start;
    }
    
    .section-header {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }
    
    .search-box {
        width: 100%;
        max-width: 100%;
    }
    
    .file-header {
        flex-direction: column;
        gap: 10px;
    }
    
    .file-actions {
        width: 100%;
        justify-content: flex-start;
    }
    
    .upload-section {
        padding: 20px;
    }
    
    .share-link-container {
        flex-direction: column;
    }
    
    .copy-btn {
        width: 100%;
        justify-content: center;
    }
    
    .admin-actions {
        flex-direction: column;
    }
    
    .user-header {
        flex-direction: column;
        gap: 10px;
    }
    
    .user-actions {
        width: 100%;
        justify-content: flex-start;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }
    
    .container {
        border-radius: 16px;
    }
    
    .auth-toggle button {
        padding: 12px;
        font-size: 0.9rem;
    }
    
    input[type="text"],
    input[type="password"],
    input[type="number"] {
        padding: 14px 14px 14px 44px;
        font-size: 0.9rem;
    }
    
    .btn {
        padding: 14px;
        font-size: 0.95rem;
    }
    
    .storage-meter {
        padding: 15px;
    }
    
    .file-meta {
        flex-direction: column;
        gap: 5px;
    }
    
    .action-btn {
        padding: 8px 12px;
        font-size: 0.85rem;
    }
    
    .admin-btn {
        padding: 10px 16px;
        font-size: 0.9rem;
    }
    
    .user-action-btn {
        padding: 8px 12px;
        font-size: 0.85rem;
    }
}