/* Responsive Banking App CSS */
:root {
    --primary-color: #1a73e8;
    --primary-dark: #1557b0;
    --secondary-color: #34a853;
    --accent-color: #fbbc04;
    --danger-color: #ea4335;
    --warning-color: #ff9800;
    --success-color: #4caf50;
    --info-color: #2196f3;
    --dark-color: #212529;
    --light-color: #f8f9fa;
    --border-color: #e0e0e0;
    --text-primary: #202124;
    --text-secondary: #5f6368;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-hover: 0 4px 20px rgba(0,0,0,0.15);
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --transition: all 0.3s ease;
    
    /* Responsive breakpoints */
    --mobile-max: 768px;
    --tablet-max: 1024px;
    --desktop-min: 1025px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
}

/* Responsive Container */
.app-container {
    width: 100%;
    min-height: 100vh;
    position: relative;
}

/* Mobile View (default) */
.mobile-container {
    max-width: 414px;
    margin: 0 auto;
    background: white;
    min-height: 100vh;
    position: relative;
    box-shadow: 0 0 30px rgba(0,0,0,0.2);
}

/* Desktop/Web View */
@media (min-width: 769px) {
    body {
        background: #f5f7fa;
    }
    
    .mobile-container {
        max-width: 1200px;
        background: transparent;
        box-shadow: none;
        padding: 20px;
    }
    
    .desktop-layout {
        display: grid;
        grid-template-columns: 250px 1fr;
        gap: 30px;
        max-width: 1400px;
        margin: 0 auto;
    }
    
    .desktop-sidebar {
        background: white;
        border-radius: var(--border-radius);
        padding: 30px 20px;
        box-shadow: var(--shadow);
        height: fit-content;
        position: sticky;
        top: 20px;
    }
    
    .desktop-main {
        background: white;
        border-radius: var(--border-radius);
        box-shadow: var(--shadow);
        overflow: hidden;
    }
}

/* Header - Responsive */
.mobile-header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 20px 20px 30px;
    position: relative;
    overflow: hidden;
}

/* Desktop Header */
@media (min-width: 769px) {
    .mobile-header {
        background: white;
        color: var(--text-primary);
        border-bottom: 1px solid var(--border-color);
        padding: 20px 30px;
    }
    
    .mobile-header .balance-card {
        background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
        color: white;
    }
}

.mobile-header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 100px;
    height: 100px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
}

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

/* Desktop Header Layout */
@media (min-width: 769px) {
    .header-top {
        margin-bottom: 30px;
    }
    
    .user-greeting h2 {
        color: var(--text-primary);
    }
    
    .user-greeting p {
        color: var(--text-secondary);
    }
}

.user-greeting h2 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 4px;
}

.user-greeting p {
    font-size: 14px;
    opacity: 0.9;
}

.header-actions {
    display: flex;
    gap: 15px;
}

.header-btn {
    width: 40px;
    height: 40px;
    border: none;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    cursor: pointer;
}

/* Desktop Header Buttons */
@media (min-width: 769px) {
    .header-btn {
        background: var(--light-color);
        color: var(--text-secondary);
    }
    
    .header-btn:hover {
        background: var(--primary-color);
        color: white;
    }
}

.header-btn:hover {
    background: rgba(255,255,255,0.3);
    transform: scale(1.05);
}

/* Balance Card - Responsive */
.balance-card {
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    padding: 20px;
    text-align: center;
    border: 1px solid rgba(255,255,255,0.2);
}

/* Desktop Balance Card */
@media (min-width: 769px) {
    .balance-card {
        background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
        backdrop-filter: none;
        border: none;
        color: white;
    }
}

.balance-label {
    font-size: 14px;
    opacity: 0.9;
    margin-bottom: 8px;
}

.balance-amount {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.balance-change {
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

.balance-change.positive {
    color: #4caf50;
}

.balance-change.negative {
    color: #f44336;
}

/* Desktop Sidebar */
.desktop-sidebar {
    display: none;
}

@media (min-width: 769px) {
    .desktop-sidebar {
        display: block;
    }
    
    .sidebar-logo {
        text-align: center;
        margin-bottom: 30px;
        padding-bottom: 20px;
        border-bottom: 1px solid var(--border-color);
    }
    
    .sidebar-logo i {
        font-size: 48px;
        color: var(--primary-color);
        margin-bottom: 10px;
        display: block;
    }
    
    .sidebar-logo h3 {
        font-size: 20px;
        font-weight: 700;
        color: var(--text-primary);
    }
    
    .sidebar-nav {
        list-style: none;
    }
    
    .sidebar-nav li {
        margin-bottom: 8px;
    }
    
    .sidebar-nav a {
        display: flex;
        align-items: center;
        padding: 12px 16px;
        color: var(--text-secondary);
        text-decoration: none;
        border-radius: var(--border-radius-sm);
        transition: var(--transition);
        font-weight: 500;
    }
    
    .sidebar-nav a:hover,
    .sidebar-nav a.active {
        background: var(--primary-color);
        color: white;
        text-decoration: none;
    }
    
    .sidebar-nav i {
        margin-right: 12px;
        width: 20px;
        text-align: center;
    }
    
    .sidebar-user {
        margin-top: 30px;
        padding-top: 20px;
        border-top: 1px solid var(--border-color);
        text-align: center;
    }
    
    .sidebar-user img {
        width: 50px;
        height: 50px;
        border-radius: 50%;
        margin-bottom: 10px;
    }
    
    .sidebar-user h4 {
        font-size: 16px;
        margin-bottom: 5px;
    }
    
    .sidebar-user p {
        font-size: 14px;
        color: var(--text-secondary);
        margin-bottom: 15px;
    }
    
    .sidebar-logout {
        width: 100%;
        padding: 8px 16px;
        background: var(--danger-color);
        color: white;
        border: none;
        border-radius: var(--border-radius-sm);
        font-size: 14px;
        cursor: pointer;
        transition: var(--transition);
    }
    
    .sidebar-logout:hover {
        background: #c62828;
    }
}

/* Quick Actions - Responsive */
.quick-actions {
    padding: 20px;
    background: white;
}

/* Desktop Quick Actions */
@media (min-width: 769px) {
    .quick-actions {
        padding: 30px;
        background: transparent;
    }
}

.section-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

/* Desktop Section Title */
@media (min-width: 769px) {
    .section-title {
        font-size: 24px;
        margin-bottom: 24px;
    }
}

.actions-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 30px;
}

/* Desktop Actions Grid */
@media (min-width: 769px) {
    .actions-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 24px;
        margin-bottom: 40px;
    }
}

.action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 16px 8px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition);
    box-shadow: var(--shadow);
}

/* Desktop Action Buttons */
@media (min-width: 769px) {
    .action-btn {
        padding: 24px 16px;
        flex-direction: row;
        text-align: left;
        justify-content: flex-start;
    }
    
    .action-btn .action-icon {
        margin-right: 16px;
        margin-bottom: 0;
    }
    
    .action-btn .action-label {
        font-size: 16px;
        text-align: left;
    }
}

.action-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
    text-decoration: none;
    color: var(--primary-color);
}

.action-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
    margin-bottom: 8px;
}

.action-label {
    font-size: 12px;
    font-weight: 500;
    text-align: center;
}

/* Content Layout - Responsive */
.content-layout {
    display: block;
}

@media (min-width: 769px) {
    .content-layout {
        display: grid;
        grid-template-columns: 2fr 1fr;
        gap: 30px;
        padding: 0 30px 30px;
    }
}

/* Mining Section - Responsive */
.mining-section {
    padding: 0 20px 20px;
}

@media (min-width: 769px) {
    .mining-section {
        padding: 0;
    }
}

.mining-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary-color);
    transition: var(--transition);
}

/* Desktop Mining Cards */
@media (min-width: 769px) {
    .mining-card {
        padding: 24px;
        margin-bottom: 20px;
    }
}

.mining-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.mining-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.mining-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

/* Desktop Mining Title */
@media (min-width: 769px) {
    .mining-title {
        font-size: 18px;
    }
}

.mining-status {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
}

.status-active {
    background: rgba(76, 175, 80, 0.1);
    color: var(--success-color);
}

.status-completed {
    background: rgba(158, 158, 158, 0.1);
    color: #9e9e9e;
}

.mining-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

/* Desktop Mining Details */
@media (min-width: 769px) {
    .mining-details {
        grid-template-columns: repeat(4, 1fr);
        gap: 20px;
    }
}

.detail-item {
    text-align: center;
}

.detail-label {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.detail-value {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: #e0e0e0;
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 3px;
    transition: width 0.3s ease;
}

.progress-text {
    font-size: 12px;
    color: var(--text-secondary);
    text-align: center;
}

/* Sidebar Content (Desktop Only) */
.sidebar-content {
    display: none;
}

@media (min-width: 769px) {
    .sidebar-content {
        display: block;
    }
    
    .stats-overview {
        background: white;
        border-radius: var(--border-radius);
        padding: 24px;
        margin-bottom: 24px;
        box-shadow: var(--shadow);
    }
    
    .stats-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }
    
    .stat-item {
        text-align: center;
        padding: 16px;
        background: var(--light-color);
        border-radius: var(--border-radius-sm);
    }
    
    .stat-value {
        font-size: 24px;
        font-weight: 700;
        color: var(--primary-color);
        margin-bottom: 4px;
    }
    
    .stat-label {
        font-size: 12px;
        color: var(--text-secondary);
        text-transform: uppercase;
        font-weight: 500;
    }
    
    .recent-activity {
        background: white;
        border-radius: var(--border-radius);
        padding: 24px;
        box-shadow: var(--shadow);
    }
    
    .activity-item {
        display: flex;
        align-items: center;
        padding: 12px 0;
        border-bottom: 1px solid var(--border-color);
    }
    
    .activity-item:last-child {
        border-bottom: none;
    }
    
    .activity-icon {
        width: 36px;
        height: 36px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        margin-right: 12px;
        font-size: 14px;
        color: white;
    }
    
    .activity-details {
        flex: 1;
    }
    
    .activity-title {
        font-size: 14px;
        font-weight: 500;
        margin-bottom: 2px;
    }
    
    .activity-time {
        font-size: 12px;
        color: var(--text-secondary);
    }
    
    .activity-amount {
        font-size: 14px;
        font-weight: 600;
    }
}

/* Transaction History */
.transaction-item {
    display: flex;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.transaction-item:hover {
    background: #f8f9fa;
}

.transaction-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 16px;
    font-size: 16px;
    color: white;
}

.transaction-icon.deposit {
    background: var(--success-color);
}

.transaction-icon.withdrawal {
    background: var(--danger-color);
}

.transaction-icon.mining {
    background: var(--primary-color);
}

.transaction-icon.referral {
    background: var(--accent-color);
}

.transaction-details {
    flex: 1;
}

.transaction-title {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 4px;
}

.transaction-date {
    font-size: 12px;
    color: var(--text-secondary);
}

.transaction-amount {
    font-size: 16px;
    font-weight: 600;
    text-align: right;
}

.transaction-amount.positive {
    color: var(--success-color);
}

.transaction-amount.negative {
    color: var(--danger-color);
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 414px;
    background: white;
    border-top: 1px solid var(--border-color);
    padding: 12px 0;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
}

.nav-items {
    display: flex;
    justify-content: space-around;
    align-items: center;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--text-secondary);
    transition: var(--transition);
    padding: 8px 16px;
}

.nav-item.active,
.nav-item:hover {
    color: var(--primary-color);
    text-decoration: none;
}

.nav-icon {
    font-size: 20px;
    margin-bottom: 4px;
}

.nav-label {
    font-size: 10px;
    font-weight: 500;
}

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

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 16px;
    transition: var(--transition);
    background: white;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.1);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 16px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    min-height: 48px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-hover);
    color: white;
    text-decoration: none;
}

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

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

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

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

.btn-block {
    width: 100%;
}

/* Alerts */
.alert {
    padding: 16px;
    border-radius: var(--border-radius-sm);
    margin-bottom: 20px;
    border-left: 4px solid;
}

.alert-success {
    background: rgba(76, 175, 80, 0.1);
    border-color: var(--success-color);
    color: #2e7d32;
}

.alert-danger {
    background: rgba(244, 67, 54, 0.1);
    border-color: var(--danger-color);
    color: #c62828;
}

.alert-warning {
    background: rgba(255, 152, 0, 0.1);
    border-color: var(--warning-color);
    color: #ef6c00;
}

.alert-info {
    background: rgba(33, 150, 243, 0.1);
    border-color: var(--info-color);
    color: #1565c0;
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

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

.modal-content {
    background: white;
    border-radius: var(--border-radius);
    padding: 24px;
    width: 90%;
    max-width: 400px;
    max-height: 80vh;
    overflow-y: auto;
    transform: scale(0.9);
    transition: var(--transition);
}

.modal-overlay.active .modal-content {
    transform: scale(1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.modal-title {
    font-size: 18px;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Loading States */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Responsive Design */
@media (max-width: 480px) {
    .mobile-container {
        max-width: 100%;
    }
    
    .actions-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .mining-details {
        grid-template-columns: 1fr;
        gap: 12px;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --text-primary: #e8eaed;
        --text-secondary: #9aa0a6;
        --border-color: #3c4043;
        --light-color: #202124;
    }
    
    body {
        background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    }
    
    .mobile-container {
        background: #202124;
    }
    
    .quick-actions,
    .mining-section {
        background: #202124;
    }
    
    .mining-card,
    .form-control {
        background: #303134;
        border-color: var(--border-color);
        color: var(--text-primary);
    }
    
    .bottom-nav {
        background: #202124;
        border-color: var(--border-color);
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.5s ease-out;
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.p-0 { padding: 0; }
.p-1 { padding: 8px; }
.p-2 { padding: 16px; }
.p-3 { padding: 24px; }
.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.justify-content-between { justify-content: space-between; }
.align-items-center { align-items: center; }
.w-100 { width: 100%; }
.h-100 { height: 100%; }