:root {
    --blue-primary: #0A2F6C;
    --blue-light: #1E3A8A;
    --blue-dark: #05204A;
    --red-primary: #CE1126;
    --red-light: #E3342F;
    --yellow-primary: #F7D117;
    --yellow-light: #FFE484;
    --gray-light: #F3F4F6;
    --gray-dark: #4B5563;
    --white: #FFFFFF;
    --black: #000000;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, var(--blue-primary) 0%, var(--blue-dark) 100%);
    color: var(--gray-dark);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header Styles */
.header {
    text-align: center;
    padding: 40px 20px;
    color: var(--white);
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 20px;
}

.logo img {
    width: 60px;
    height: 60px;
}

.logo h1 {
    font-size: 2rem;
    font-weight: bold;
}

.highlight {
    color: var(--yellow-primary);
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Features Section */
.welcome-section {
    margin: 40px 0;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.feature {
    background: var(--white);
    padding: 30px 20px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.feature:hover {
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.feature h3 {
    color: var(--blue-primary);
    margin-bottom: 10px;
}

/* Login Form */
.login-form, .register-form {
    background: var(--white);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    max-width: 500px;
    margin: 0 auto 40px;
}

.login-form h2, .register-form h2 {
    text-align: center;
    color: var(--blue-primary);
    margin-bottom: 30px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--gray-dark);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #E5E7EB;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--yellow-primary);
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--red-primary);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--red-light);
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--blue-primary);
    color: var(--white);
}

.btn-secondary:hover {
    background: var(--blue-light);
    transform: translateY(-2px);
}

.btn-danger {
    background: #DC2626;
    color: var(--white);
}

.btn-block {
    width: 100%;
}

/* Alerts */
.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    animation: slideIn 0.3s ease;
}

.alert-error {
    background: #FEE2E2;
    color: #DC2626;
    border-left: 4px solid #DC2626;
}

.alert-success {
    background: #D1FAE5;
    color: #059669;
    border-left: 4px solid #059669;
}

/* Navigation */
.app-container {
    min-height: 100vh;
    background: var(--gray-light);
}

.nav-bar {
    background: var(--white);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-brand h2 {
    color: var(--blue-primary);
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.nav-link {
    padding: 20px 10px;
    color: var(--gray-dark);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--red-primary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--red-primary);
}

.nav-user {
    padding: 15px 0;
    color: var(--blue-primary);
    font-weight: 500;
}

/* Dashboard */
.dashboard-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 30px 20px;
}

.balance-card {
    background: linear-gradient(135deg, var(--blue-primary) 0%, var(--blue-dark) 100%);
    color: var(--white);
    padding: 40px;
    border-radius: 15px;
    margin-bottom: 30px;
    text-align: center;
}

.balance-label {
    font-size: 1.1rem;
    margin-bottom: 10px;
    opacity: 0.9;
}

.balance-amount {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 20px;
}

.balance-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--white);
    padding: 20px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    gap: 15px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

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

.stat-info {
    flex: 1;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--blue-primary);
}

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

.transactions-section {
    background: var(--white);
    border-radius: 15px;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--gray-light);
}

.view-all {
    color: var(--red-primary);
    text-decoration: none;
}

.transactions-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.transaction-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    border-radius: 10px;
    transition: background 0.3s ease;
}

.transaction-item:hover {
    background: var(--gray-light);
}

.transaction-icon {
    font-size: 1.5rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-light);
    border-radius: 50%;
}

.transaction-details {
    flex: 1;
}

.transaction-title {
    font-weight: 500;
    margin-bottom: 5px;
}

.transaction-date {
    font-size: 0.85rem;
    color: var(--gray-dark);
}

.transaction-amount {
    font-weight: bold;
    font-size: 1.1rem;
}

.transaction-amount.positive {
    color: #059669;
}

.transaction-amount.negative {
    color: #DC2626;
}

/* Transfer Page */
.page-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 30px 20px;
}

.page-header {
    margin-bottom: 30px;
}

.page-header h1 {
    color: var(--blue-primary);
    margin-bottom: 10px;
}

.transfer-container,
.withdraw-container,
.profile-container {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 30px;
}

.transfer-form-container,
.withdraw-form-container,
.profile-form-container {
    background: var(--white);
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.recent-contacts {
    margin-bottom: 20px;
}

.contacts-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 10px;
}

.contact-chip {
    background: var(--gray-light);
    padding: 8px 12px;
    border-radius: 20px;
    cursor: pointer;
    transition: background 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.contact-chip:hover {
    background: var(--yellow-light);
}

.quick-amounts {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 10px;
}

.quick-amount {
    background: var(--gray-light);
    padding: 5px 10px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background 0.3s ease;
}

.quick-amount:hover {
    background: var(--yellow-light);
}

.info-card {
    background: var(--white);
    padding: 20px;
    border-radius: 15px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.info-card h3 {
    color: var(--blue-primary);
    margin-bottom: 15px;
}

.info-card ul {
    list-style: none;
    padding-left: 0;
}

.info-card li {
    padding: 8px 0;
    border-bottom: 1px solid var(--gray-light);
}

/* Virtual Card */
.virtual-card-container,
.create-card-container {
    background: var(--white);
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.virtual-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    padding: 30px;
    border-radius: 15px;
    margin-bottom: 30px;
    position: relative;
    overflow: hidden;
}

.card-chip {
    font-size: 2rem;
    margin-bottom: 30px;
}

.card-number {
    font-size: 1.5rem;
    letter-spacing: 2px;
    margin-bottom: 30px;
    font-family: monospace;
}

.card-details {
    display: flex;
    gap: 30px;
    margin-bottom: 30px;
}

.card-label {
    font-size: 0.8rem;
    opacity: 0.8;
    margin-bottom: 5px;
}

.card-value {
    font-size: 1rem;
    font-weight: 500;
}

.card-brand {
    position: absolute;
    bottom: 20px;
    right: 20px;
    font-size: 1.5rem;
    font-weight: bold;
}

.card-actions {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
}

.card-preview {
    margin-bottom: 30px;
}

.preview-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    padding: 30px;
    border-radius: 15px;
    opacity: 0.7;
}

.create-card-info ul,
.features-list {
    margin: 20px 0;
}

.feature-item {
    padding: 10px 0;
    border-bottom: 1px solid var(--gray-light);
}

/* Operator Select */
.operator-select {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 15px;
}

.operator-option {
    cursor: pointer;
}

.operator-option input {
    display: none;
}

.operator-card {
    background: var(--gray-light);
    padding: 15px;
    border-radius: 10px;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.operator-option input:checked + .operator-card {
    background: var(--yellow-light);
    border: 2px solid var(--yellow-primary);
    transform: scale(1.05);
}

.operator-icon {
    font-size: 2rem;
    display: block;
    margin-bottom: 10px;
}

.operator-name {
    font-weight: 500;
}

/* Profile Page */
.profile-info {
    background: var(--white);
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.profile-header {
    text-align: center;
    margin-bottom: 30px;
}

.profile-avatar {
    font-size: 4rem;
    margin-bottom: 10px;
}

.profile-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.detail-item {
    padding: 15px;
    background: var(--gray-light);
    border-radius: 10px;
}

.detail-label {
    font-size: 0.85rem;
    color: var(--gray-dark);
    margin-bottom: 5px;
}

.detail-value {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--blue-primary);
}

/* Animations */
@keyframes slideIn {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.notification-push {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--white);
    border-left: 4px solid var(--red-primary);
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-width: 300px;
    z-index: 1000;
    animation: slideIn 0.3s ease;
}

.notification-content {
    flex: 1;
    margin-right: 15px;
}

.notification-content strong {
    display: block;
    margin-bottom: 5px;
    color: var(--blue-primary);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-bar {
        flex-direction: column;
        padding: 10px;
    }
    
    .nav-menu {
        justify-content: center;
        gap: 15px;
    }
    
    .nav-link {
        padding: 10px;
    }
    
    .transfer-container,
    .withdraw-container,
    .profile-container {
        grid-template-columns: 1fr;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
    
    .balance-amount {
        font-size: 2rem;
    }
    
    .card-number {
        font-size: 1rem;
    }
    
    .card-details {
        flex-direction: column;
        gap: 15px;
    }
    
    .operator-select {
        grid-template-columns: 1fr;
    }
    
    .notification-push {
        left: 20px;
        right: 20px;
        min-width: auto;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 10px;
    }
    
    .login-form,
    .register-form {
        padding: 20px;
    }
    
    .balance-card {
        padding: 20px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* Loading States */
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Print Styles */
@media print {
    .nav-bar,
    .balance-actions,
    .card-actions {
        display: none;
    }
    
    .virtual-card {
        background: #fff;
        color: #000;
        border: 1px solid #ddd;
    }
}