:root {
    --primary-color: #2c3e50;
    --secondary-color: #34495e;
    --accent-color: #3498db;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --light-bg: #ecf0f1;
    --dark-text: #2c3e50;
}

body {
    background-color: var(--light-bg);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* Login Page Styles */
.login-page {
    background: #f8f9fa;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    padding: 2rem 1rem;
}

.login-container {
    background: white;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 2.5rem;
    max-width: 420px;
    width: 100%;
    margin: 0 auto;
}

/* Register Page Styles */
.register-page {
    background: #f8f9fa;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.register-container {
    background: white;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 2.5rem;
    max-width: 520px;
    width: 100%;
    margin: 0 auto;
}

.btn-register {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: 10px;
    padding: 0.75rem 2rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
}

.btn-register:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

/* Login Form Styles */
.login-container .form-floating {
    margin-bottom: 1.5rem;
}

.login-container .form-floating:last-of-type {
    margin-bottom: 1rem;
}

.login-container .form-check {
    margin-bottom: 1.5rem;
}

.login-container .d-grid {
    margin-bottom: 1.5rem;
}

.login-container .btn-login {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: 12px;
    padding: 0.875rem 1.5rem;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.login-container .btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.password-toggle {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: #6c757d;
    cursor: pointer;
    z-index: 10;
    transition: color 0.3s ease;
}

.password-toggle:hover {
    color: #667eea;
}

/* Login Links and Security Info */
.register-link {
    text-align: center;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid #e9ecef;
}

.register-link p {
    margin-bottom: 0.5rem;
    color: #6c757d;
    font-size: 0.95rem;
}

.register-link a {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.register-link a:hover {
    color: #5a6fd8;
    text-decoration: underline;
}

.security-info {
    background: #f8f9fa;
    border-radius: 12px;
    padding: 1.5rem;
    margin-top: 1.5rem;
    border: 1px solid #e9ecef;
}

.security-info strong {
    color: #2c3e50;
    margin-left: 0.5rem;
}

.security-info i {
    color: #28a745;
    font-size: 1.1rem;
}

.security-info ul {
    margin-top: 1rem;
    color: #6c757d;
    font-size: 0.9rem;
}

.security-info li {
    margin-bottom: 0.25rem;
}

.login-link {
    text-align: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid #e9ecef;
}

.login-link a {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
}

.password-strength {
    margin-top: 0.5rem;
    font-size: 0.85rem;
}

.strength-bar {
    height: 4px;
    border-radius: 2px;
    background: #e9ecef;
    margin-top: 0.25rem;
    overflow: hidden;
}

.strength-fill {
    height: 100%;
    transition: all 0.3s ease;
    width: 0%;
}

.strength-weak { background: #dc3545; }
.strength-fair { background: #ffc107; }
.strength-good { background: #17a2b8; }
.strength-strong { background: #28a745; }

.requirements {
    background: #f8f9fa;
    border-radius: 10px;
    padding: 1rem;
    margin-top: 1rem;
    font-size: 0.85rem;
}

.requirement {
    display: flex;
    align-items: center;
    margin-bottom: 0.25rem;
}

.requirement i {
    margin-right: 0.5rem;
    width: 16px;
}

.requirement.valid i {
    color: #28a745;
}

.requirement.invalid i {
    color: #dc3545;
}

.logo {
    text-align: center;
    margin-bottom: 2.5rem;
}

.logo i {
    font-size: 3.5rem;
    color: #667eea;
    margin-bottom: 1rem;
    display: block;
}

.logo h1 {
    color: #2c3e50;
    font-weight: 600;
    margin-bottom: 0.5rem;
    font-size: 1.75rem;
}

.logo p {
    color: #6c757d;
    margin: 0;
    font-size: 0.95rem;
}

/* Sidebar Styles */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: 260px;
    background: white;
    color: #2c3e50;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: 1000;
    overflow-y: auto;
    border-right: 1px solid #e9ecef;
    box-shadow: 2px 0 12px rgba(0,0,0,0.08);
}

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

.sidebar-header {
    padding: 2rem 1.5rem 1.5rem;
    border-bottom: 1px solid #e9ecef;
    text-align: center;
    background: #f8f9fa;
}

.sidebar-header h4 {
    color: #667eea;
    margin: 0 0 0.5rem 0;
    font-weight: 700;
    font-size: 1.25rem;
}

.sidebar-header small {
    color: #6c757d;
    font-weight: 500;
}

.sidebar-menu {
    padding: 1.5rem 0;
}

.sidebar-menu .nav-link {
    color: #6c757d;
    padding: 0.875rem 1.5rem;
    border: none;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    text-decoration: none;
    font-weight: 500;
    border-radius: 0 25px 25px 0;
    margin: 0.25rem 0;
    margin-right: 1rem;
}

.sidebar-menu .nav-link:hover {
    background-color: #f8f9fa;
    color: #667eea;
    transform: translateX(8px);
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.15);
}

.sidebar-menu .nav-link.active {
    background-color: #667eea;
    color: white;
    transform: translateX(8px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.sidebar-menu .nav-link i {
    margin-right: 0.875rem;
    width: 20px;
    text-align: center;
    font-size: 1.1rem;
}

/* Main Content Styles */
.main-content {
    margin-left: 0;
    min-height: 100vh;
    transition: margin-left 0.3s ease;
    background-color: var(--light-bg);
}

.top-navbar {
    background: white;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color, #dee2e6);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.content-area {
    padding: 1.5rem;
    max-width: 100%;
    box-sizing: border-box;
}

/* Import Page Styles */
.import-card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    border: 1px solid var(--border-color, #dee2e6);
}

.import-type-card {
    border: 2px solid var(--border-color, #dee2e6);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 1rem;
    background: white;
}

.import-type-card:hover {
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.2);
}

.import-type-card.selected {
    border-color: var(--accent-color);
    background: rgba(52, 152, 219, 0.05);
}

.import-type-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 1.5rem;
}

.bitwarden-icon {
    background: linear-gradient(135deg, #175ddc, #1252c7);
    color: white;
}

.lastpass-icon {
    background: #d32d27;
    color: white;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.lastpass-icon:hover {
    background: #b02621;
    transform: scale(1.05);
}

.keepass-icon {
    background: #326ce5;
    color: white;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.keepass-icon:hover {
    background: #1a5bb8;
    transform: scale(1.05);
}

.generic-icon {
    background: #6c757d;
    color: white;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.generic-icon:hover {
    background: #495057;
    transform: scale(1.05);
}

.upload-area {
    border: 2px dashed var(--border-color, #dee2e6);
    border-radius: 12px;
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: #fafafa;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--accent-color);
    background: rgba(52, 152, 219, 0.05);
}

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

.status-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.status-success {
    background: rgba(39, 174, 96, 0.1);
    color: var(--success-color);
}

.status-warning {
    background: rgba(243, 156, 18, 0.1);
    color: var(--warning-color);
}

.status-error {
    background: rgba(231, 76, 60, 0.1);
    color: var(--danger-color);
}

.status-processing {
    background: rgba(52, 152, 219, 0.1);
    color: var(--accent-color);
}

.preview-table {
    max-height: 400px;
    overflow-y: auto;
}

.history-card {
    border: 1px solid var(--border-color, #dee2e6);
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
    background: #fafafa;
}

/* Card Styles */
.stat-card {
    border: none;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    overflow: hidden;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.stat-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--dark-text);
}

.stat-label {
    color: #666;
    margin: 0;
    font-size: 0.9rem;
}

.collection-card {
    background: white;
    border: 1px solid #e9ecef;
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.collection-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    border-color: #667eea;
}

.collection-header {
    background: #667eea;
    color: white;
    padding: 1.5rem;
    border-radius: 16px 16px 0 0;
    font-weight: 600;
}

.collection-body {
    padding: 1.5rem;
}

/* Button Styles */
.btn-primary {
    background: #667eea;
    border: none;
    border-radius: 12px;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background: #5a6fd8;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.btn-outline-primary {
    border: 2px solid #667eea;
    color: #667eea;
    background: transparent;
    border-radius: 12px;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-outline-primary:hover {
    background: #667eea;
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.btn-danger {
    background: #e74c3c;
    border: none;
    border-radius: 12px;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-danger:hover {
    background: #c0392b;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(231, 76, 60, 0.3);
}

/* Modal Styles */
.modal-content {
    border-radius: 16px;
    border: 1px solid #e9ecef;
    box-shadow: 0 12px 32px rgba(0,0,0,0.15);
}

.modal-header {
    background: #667eea;
    color: white;
    border-radius: 16px 16px 0 0;
    border-bottom: none;
    padding: 1.25rem 1.5rem;
    font-weight: 600;
}

/* Form Styles */
.form-control,
.form-select {
    border-radius: 10px;
    border: 2px solid #e9ecef;
    padding: 0.75rem 1rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
}

.form-floating > label {
    color: #666;
}

.form-floating > .form-control:focus ~ label,
.form-floating > .form-control:not(:placeholder-shown) ~ label {
    color: var(--accent-color);
}

/* Alert Styles */
.alert {
    border-radius: 10px;
    border: none;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

/* Table Styles */
.table {
    border-radius: 10px;
    overflow: hidden;
}

.table thead th {
    background: var(--primary-color);
    color: white;
    border: none;
    font-weight: 600;
}

.table tbody tr:hover {
    background-color: rgba(52, 152, 219, 0.05);
}

/* Responsive Design */
@media (min-width: 768px) {
    .sidebar {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 250px;
    }
}

@media (max-width: 767px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .content-area {
        padding: 1rem;
    }
    
    .top-navbar {
        padding: 1rem;
    }
    
    /* Login Page Mobile Styles */
    .login-page {
        padding: 1rem 0.5rem;
    }
    
    .login-container {
        padding: 2rem 1.5rem;
        max-width: 100%;
        margin: 0;
    }
    
    .logo h1 {
        font-size: 1.5rem;
    }
    
    .logo i {
        font-size: 3rem;
    }
    
    .security-info {
        padding: 1rem;
    }
    
    .security-info ul {
        font-size: 0.85rem;
    }
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

.spin {
    display: inline-block;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Password Strength Indicator */
.password-strength {
    height: 4px;
    border-radius: 2px;
    margin-top: 5px;
    transition: all 0.3s ease;
}

.password-strength.weak {
    background-color: var(--danger-color);
    width: 25%;
}

.password-strength.medium {
    background-color: var(--warning-color);
    width: 50%;
}

.password-strength.strong {
    background-color: var(--success-color);
    width: 75%;
}

.password-strength.very-strong {
    background-color: var(--success-color);
    width: 100%;
}

/* Password Strength Bar for Admin */
.password-strength-bar {
    width: 100%;
    height: 6px;
    background-color: #e9ecef;
    border-radius: 3px;
    overflow: hidden;
}

.strength-fill {
    height: 100%;
    width: 0%;
    transition: all 0.3s ease;
    border-radius: 3px;
}

.strength-fill.strength-weak {
    background-color: #dc3545;
    width: 20%;
}

.strength-fill.strength-fair {
    background-color: #fd7e14;
    width: 40%;
}

.strength-fill.strength-good {
    background-color: #ffc107;
    width: 70%;
}

.strength-fill.strength-strong {
    background-color: #28a745;
    width: 100%;
}

/* Password Requirements */
.password-requirements {
    font-size: 0.875rem;
    background: #f8f9fa;
    border-radius: 8px;
    padding: 12px;
    border: 1px solid #e9ecef;
    opacity: 0.9;
    transform: translateY(-5px);
    transition: all 0.3s ease;
}

.password-requirements ul {
    margin-bottom: 0;
}

.password-requirements .requirement {
    display: flex;
    align-items: center;
    margin-bottom: 0.4rem;
    font-size: 0.85rem;
    padding: 6px 10px;
    border-radius: 6px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: transparent;
    position: relative;
    overflow: hidden;
}

.password-requirements .requirement:last-child {
    margin-bottom: 0;
}

.password-requirements .requirement i {
    margin-right: 0.6rem;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.password-requirements .requirement.valid {
    color: #155724;
    background: rgba(40, 167, 69, 0.1);
    border-left: 3px solid #28a745;
}

.password-requirements .requirement.invalid {
    color: #6c757d;
    background: transparent;
    border-left: 3px solid transparent;
}

.password-requirements .requirement.valid i {
    color: #28a745;
    transform: scale(1.1);
}

.password-requirements .requirement.invalid i {
    color: #dc3545;
    transform: scale(1);
}

.password-requirements .requirement.valid::before {
    content: '';
    position: absolute;
    left: -1px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(to bottom, #28a745, #20c997);
    border-radius: 0 2px 2px 0;
}

/* Utility Classes */
.text-gradient {
    background: linear-gradient(135deg, var(--accent-color), #5dade2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.shadow-custom {
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.border-gradient {
    border: 2px solid;
    border-image: linear-gradient(135deg, var(--accent-color), #5dade2) 1;
}

/* Views Specific Styles */

/* Main Content Layout */
.main-content {
    background-color: #f8f9fa;
    min-height: calc(100vh - 80px);
    margin-left: 260px;
    transition: margin-left 0.3s ease;
    padding: 0;
    overflow-x: hidden;
}

.top-navbar {
    background: white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* Password Cards */
.password-card {
    border: 1px solid #e9ecef;
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    margin-bottom: 24px;
    background: white;
    width: 100%;
    min-width: 50%;
}

.password-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    border-color: #667eea;
}

.password-card .card-header {
    background: #667eea;
    color: white;
    border-radius: 16px 16px 0 0 !important;
    border: none;
    padding: 1rem 1.25rem;
    font-weight: 600;
}

/* Settings Cards */
.settings-card {
    border: 1px solid #e9ecef;
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    margin-bottom: 24px;
    background: white;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.settings-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

.settings-card .card-header {
    background: #667eea;
    color: white;
    border-radius: 16px 16px 0 0 !important;
    border: none;
    padding: 1rem 1.25rem;
    font-weight: 600;
}

/* Admin Cards */
.stats-card {
    border: 1px solid #e9ecef;
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    background: white;
}

.stats-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
    border-color: #667eea;
}

.admin-card {
    border: 1px solid #e9ecef;
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    margin-bottom: 24px;
    background: white;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.admin-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

.admin-card .card-header {
    background: #667eea;
    color: white;
    border-radius: 16px 16px 0 0 !important;
    border: none;
    padding: 1rem 1.25rem;
    font-weight: 600;
}

/* Form Controls */
.form-control:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

.btn-primary {
    background: #667eea;
    border: none;
    border-radius: 12px;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background: #5a6fd8;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

/* Password Strength Indicator */
.password-strength {
    height: 5px;
    border-radius: 3px;
    margin-top: 5px;
    transition: all 0.3s;
}

.strength-weak { background-color: #dc3545; }
.strength-medium { background-color: #ffc107; }
.strength-strong { background-color: #28a745; }

/* Password Field */
.password-field {
    font-family: 'Courier New', monospace;
    letter-spacing: 1px;
}

/* Copy Button */
.copy-btn {
    transition: all 0.3s;
}

.copy-btn:hover {
    transform: scale(1.1);
}

/* User Avatar */
.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #667eea;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    border: 2px solid #e9ecef;
    transition: all 0.3s ease;
}

.user-avatar:hover {
    background: #5a6fd8;
    border-color: #667eea;
    transform: scale(1.05);
}

/* Status Badge */
.status-badge {
    font-size: 0.75rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        top: 0;
        left: -260px;
        width: 260px;
        z-index: 1000;
        transition: left 0.3s ease;
        box-shadow: 4px 0 20px rgba(0,0,0,0.15);
    }
    
    .sidebar.show {
        left: 0;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .sidebar-toggle {
        display: block !important;
    }
    
    .sidebar-menu .nav-link {
        margin-right: 0;
        border-radius: 0;
    }
    
    .sidebar-menu .nav-link:hover,
    .sidebar-menu .nav-link.active {
        transform: none;
        border-radius: 0;
    }
}

/* Spinner Animation */
.spin {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}