:root {
    /* Professional color scheme */
    --primary: #2563eb;
    --primary-light: #3b82f6;
    --primary-dark: #1d4ed8;
    --primary-glow: rgba(37, 99, 235, 0.1);

    --success: #10b981;
    --success-light: #34d399;
    --warning: #f59e0b;
    --warning-light: #fbbf24;
    --error: #ef4444;

    --paypal-blue: #0070ba;
    --paypal-light: #009cde;

    /* Light theme */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-tertiary: #94a3b8;
    --card-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --card-shadow-hover: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --gradient-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);

    /* Dark theme */
    --dark-bg-primary: #0f172a;
    --dark-bg-secondary: #1e293b;
    --dark-bg-tertiary: #334155;
    --dark-border: #475569;
    --dark-border-light: #334155;
    --dark-text-primary: #f1f5f9;
    --dark-text-secondary: #cbd5e1;
    --dark-text-tertiary: #94a3b8;
    --dark-card-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    --dark-card-shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.4);
    --dark-gradient-bg: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    padding-top: 0;
}

body.dark-theme {
    background-color: var(--dark-bg-primary);
    color: var(--dark-text-primary);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px;
    position: relative;
}

@media (min-width: 640px) {
    .container {
        padding: 0 20px;
    }
}

@media (min-width: 768px) {
    .container {
        padding: 0 24px;
    }
}

/* Header - Logo Always Visible - Consolidated Version */
header {
    padding: 16px 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    z-index: 1000;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--border-light);
    box-shadow: 0 1px 10px rgba(0, 0, 0, 0.05);
}

.dark-theme header {
    background-color: rgba(15, 23, 42, 0.98);
    border-bottom-color: var(--dark-border);
    box-shadow: 0 1px 10px rgba(0, 0, 0, 0.2);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    transition: transform 0.3s ease;
    flex-shrink: 0;
    min-width: 0;
    flex: 1;
    min-width: 120px;
}

.logo:hover {
    transform: translateY(-1px);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--paypal-blue));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1rem;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
    flex-shrink: 0;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--paypal-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 120px;
    flex-shrink: 0;
}

.dark-theme .logo-text {
    background: linear-gradient(135deg, var(--primary-light), var(--paypal-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.price-update {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background-color: var(--bg-secondary);
    border-radius: 10px;
    font-size: 0.75rem;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    white-space: nowrap;
    flex-shrink: 0;
}

.dark-theme .price-update {
    background-color: var(--dark-bg-secondary);
    color: var(--dark-text-secondary);
}

.price-update:hover {
    background-color: var(--bg-tertiary);
    transform: translateY(-1px);
}

.dark-theme .price-update:hover {
    background-color: var(--dark-bg-tertiary);
}

.price-update i {
    color: var(--primary);
    animation: spin 2s linear infinite;
}

.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    border: none;
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.theme-toggle:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    transform: translateY(-2px);
    box-shadow: var(--card-shadow);
}

.dark-theme .theme-toggle {
    background-color: var(--dark-bg-secondary);
    color: var(--dark-text-secondary);
}

.dark-theme .theme-toggle:hover {
    background-color: var(--dark-bg-tertiary);
    color: var(--dark-text-primary);
}

/* Mobile Responsive - Consolidated Media Queries */
@media (max-width: 768px) {
    header {
        padding: 14px 0;
    }
    
    .container {
        padding: 0 16px;
    }
    
    .header-content {
        gap: 10px;
    }
    
    .logo {
        flex: 1;
        min-width: 120px;
    }
    
    .logo-icon {
        width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }
    
    .logo-text {
        font-size: 1.1rem;
        min-width: 110px;
        max-width: none;
    }
    
    .header-actions {
        gap: 8px;
    }
    
    .price-update {
        padding: 6px 10px;
        font-size: 0.7rem;
        max-width: 110px;
    }
    
    .price-update span {
        display: inline-block;
        max-width: 70px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
    
    .theme-toggle {
        width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }
}

@media (max-width: 640px) {
    .logo-icon {
        width: 34px;
        height: 34px;
        font-size: 0.85rem;
    }
    
    .logo-text {
        font-size: 1rem;
        min-width: 105px;
    }
    
    .price-update {
        max-width: 90px;
        padding: 5px 8px;
    }
    
    .price-update span {
        max-width: 50px;
    }
    
    .theme-toggle {
        width: 34px;
        height: 34px;
        font-size: 0.85rem;
    }
}

@media (max-width: 520px) {
    .price-update {
        display: none;
    }
    
    .logo {
        min-width: 110px;
    }
    
    .logo-text {
        font-size: 1rem;
        min-width: 100px;
        max-width: none;
    }
    
    .header-actions {
        gap: 6px;
    }
}

@media (max-width: 480px) {
    header {
        padding: 12px 0;
    }
    
    .container {
        padding: 0 12px;
    }
    
    .header-content {
        gap: 6px;
    }
    
    .logo {
        min-width: 105px;
    }
    
    .logo-icon {
        width: 32px;
        height: 32px;
        font-size: 0.8rem;
    }
    
    .logo-text {
        font-size: 0.95rem;
        min-width: 95px;
    }
    
    .theme-toggle {
        width: 32px;
        height: 32px;
        font-size: 0.8rem;
    }
}

@media (max-width: 400px) {
    .logo {
        min-width: 100px;
    }
    
    .logo-icon {
        width: 30px;
        height: 30px;
        font-size: 0.75rem;
    }
    
    .logo-text {
        font-size: 0.9rem;
        min-width: 90px;
    }
    
    .theme-toggle {
        width: 30px;
        height: 30px;
        font-size: 0.75rem;
    }
}

@media (max-width: 360px) {
    .container {
        padding: 0 10px;
    }
    
    .header-content {
        gap: 4px;
    }
    
    .logo {
        min-width: 95px;
    }
    
    .logo-icon {
        width: 28px;
        height: 28px;
        font-size: 0.7rem;
    }
    
    .logo-text {
        font-size: 0.85rem;
        min-width: 85px;
    }
    
    .theme-toggle {
        width: 28px;
        height: 28px;
        font-size: 0.7rem;
    }
}

@media (max-width: 320px) {
    .logo {
        min-width: 90px;
    }
    
    .logo-icon {
        width: 26px;
        height: 26px;
        font-size: 0.65rem;
    }
    
    .logo-text {
        font-size: 0.8rem;
        min-width: 80px;
    }
    
    .theme-toggle {
        width: 26px;
        height: 26px;
        font-size: 0.65rem;
    }
}

@media (max-width: 280px) {
    .logo {
        min-width: 85px;
    }
    
    .logo-icon {
        width: 24px;
        height: 24px;
        font-size: 0.6rem;
    }
    
    .logo-text {
        font-size: 0.75rem;
        min-width: 75px;
    }
    
    .theme-toggle {
        width: 24px;
        height: 24px;
        font-size: 0.6rem;
    }
}

/* Main Content - Added padding-top to account for fixed header */
main {
    padding-top: 100px;
    position: relative;
}

@media (max-width: 768px) {
    main {
        padding-top: 90px;
    }
}

.main-content {
    padding: 32px 0;
}

/* Progress Steps - Adjusted margin-top */
.progress-steps {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
    position: relative;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    margin-top: 10px;
}

.progress-steps::before {
    content: '';
    position: absolute;
    top: 25px;
    left: 20%;
    right: 20%;
    height: 2px;
    background-color: var(--border);
    z-index: 1;
    margin-top: 30px;
}

@media (max-width: 768px) {
    .progress-steps::before {
        left: 15%;
        right: 15%;
    }
}

@media (max-width: 480px) {
    .progress-steps::before {
        display: none;
    }
}

.dark-theme .progress-steps::before {
    background-color: var(--dark-border);
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    z-index: 2;
    flex: 1;
    margin-top: 30px;
}

.step-icon {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background-color: var(--bg-secondary);
    border: 2px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 10px;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    position: relative;
    margin-top: 30px;
    cursor: pointer;
}

@media (max-width: 640px) {
    .step-icon {
        width: 40px;
        height: 40px;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .step-icon {
        width: 36px;
        height: 36px;
        font-size: 0.8rem;
        margin-bottom: 8px;
    }
}

.dark-theme .step-icon {
    background-color: var(--dark-bg-secondary);
    border-color: var(--dark-border);
    color: var(--dark-text-secondary);
}

.step.active .step-icon {
    background-color: var(--primary);
    border-color: var(--primary);
    color: white;
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.3);
    transform: scale(1.1);
}

.step.completed .step-icon {
    background-color: var(--success);
    border-color: var(--success);
    color: white;
}

.step.completed .step-icon::after {
    content: '✓';
    position: absolute;
    font-size: 1.1rem;
}

.step-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    padding: 0 4px;
}

@media (max-width: 480px) {
    .step-label {
        font-size: 0.7rem;
    }
}

.dark-theme .step-label {
    color: var(--dark-text-secondary);
}

.step.active .step-label {
    color: var(--primary);
    font-weight: 700;
}

/* Card Styles */
.card {
    background-color: var(--bg-primary);
    border-radius: 18px;
    border: 1px solid var(--border);
    padding: 24px;
    box-shadow: var(--card-shadow);
    transition: all 0.3s ease;
    margin-bottom: 24px;
}

@media (max-width: 480px) {
    .card {
        padding: 20px;
        border-radius: 16px;
        margin-bottom: 20px;
    }
}

.dark-theme .card {
    background-color: var(--dark-bg-secondary);
    border-color: var(--dark-border);
    box-shadow: var(--dark-card-shadow);
}

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

.dark-theme .card:hover {
    box-shadow: var(--dark-card-shadow-hover);
}

.card-header {
    margin-bottom: 24px;
    position: relative;
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--primary), var(--paypal-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@media (max-width: 480px) {
    .card-title {
        font-size: 1.25rem;
    }
}

.dark-theme .card-title {
    background: linear-gradient(135deg, var(--primary-light), var(--paypal-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.card-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

@media (max-width: 480px) {
    .card-subtitle {
        font-size: 0.85rem;
    }
}

.dark-theme .card-subtitle {
    color: var(--dark-text-secondary);
}

/* Crypto Grid - Mobile Responsive */
.crypto-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-top: 20px;
}

@media (min-width: 480px) {
    .crypto-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }
}

@media (min-width: 640px) {
    .crypto-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (min-width: 768px) {
    .crypto-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
}

.crypto-card {
    padding: 20px;
    border: 1px solid var(--border);
    border-radius: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
    background-color: var(--bg-primary);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

@media (max-width: 480px) {
    .crypto-card {
        padding: 16px;
        border-radius: 12px;
    }
}

.dark-theme .crypto-card {
    border-color: var(--dark-border);
    background-color: var(--dark-bg-secondary);
}

.crypto-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: 0 10px 25px -5px rgba(37, 99, 235, 0.1);
}

.dark-theme .crypto-card:hover {
    box-shadow: 0 10px 25px -5px rgba(37, 99, 235, 0.2);
}

.crypto-card.selected {
    border-color: var(--primary);
    background-color: var(--primary-glow);
    box-shadow: 0 8px 30px rgba(37, 99, 235, 0.15);
}

.dark-theme .crypto-card.selected {
    background-color: rgba(37, 99, 235, 0.15);
}

.crypto-card.selected::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--paypal-blue));
}

.crypto-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    font-size: 24px;
    color: white;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
    overflow: hidden;
    padding: 8px;
}

@media (max-width: 480px) {
    .crypto-icon {
        width: 48px;
        height: 48px;
        margin-bottom: 12px;
        font-size: 20px;
    }
}

.crypto-icon img {
    width: 28px;
    height: 28px;
    object-fit: contain;
}

@media (max-width: 480px) {
    .crypto-icon img {
        width: 24px;
        height: 24px;
    }
}

.crypto-name {
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 4px;
    line-height: 1.3;
}

@media (max-width: 480px) {
    .crypto-name {
        font-size: 0.9rem;
    }
}

.crypto-symbol {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-bottom: 12px;
    font-weight: 500;
}

@media (max-width: 480px) {
    .crypto-symbol {
        font-size: 0.75rem;
        margin-bottom: 10px;
    }
}

.dark-theme .crypto-symbol {
    color: var(--dark-text-secondary);
}

.crypto-price {
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 6px;
    color: var(--text-primary);
    line-height: 1.3;
}

@media (max-width: 480px) {
    .crypto-price {
        font-size: 0.95rem;
    }
}

.dark-theme .crypto-price {
    color: var(--dark-text-primary);
}

.price-change {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: 16px;
    display: inline-block;
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

@media (max-width: 480px) {
    .price-change {
        font-size: 0.7rem;
        padding: 3px 6px;
    }
}

.price-change.negative {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--error);
}

.loading-price {
    width: 80px;
    height: 24px;
    background: linear-gradient(90deg,
        var(--border) 25%,
        var(--bg-tertiary) 50%,
        var(--border) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s ease-in-out infinite;
    border-radius: 6px;
}

@media (max-width: 480px) {
    .loading-price {
        width: 60px;
        height: 20px;
    }
}

.dark-theme .loading-price {
    background: linear-gradient(90deg,
        var(--dark-border) 25%,
        var(--dark-bg-tertiary) 50%,
        var(--dark-border) 75%);
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* TradingView Widget */
.tradingview-widget {
    margin-top: 24px;
    border-radius: 14px;
    overflow: hidden;
    border: 1px solid var(--border);
    height: 350px;
    display: none;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

@media (max-width: 768px) {
    .tradingview-widget {
        height: 300px;
    }
}

@media (max-width: 480px) {
    .tradingview-widget {
        height: 280px;
        border-radius: 12px;
    }
}

.dark-theme .tradingview-widget {
    border-color: var(--dark-border);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.tradingview-widget.active {
    display: block;
    animation: slideUp 0.4s ease;
}

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

/* Form Elements */
.form-group {
    margin-bottom: 24px;
}

.form-label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
}

@media (max-width: 480px) {
    .form-label {
        font-size: 0.85rem;
        margin-bottom: 8px;
    }
}

.dark-theme .form-label {
    color: var(--dark-text-primary);
}

.form-control {
    width: 100%;
    padding: 14px;
    border: 2px solid var(--border);
    border-radius: 10px;
    font-size: 0.95rem;
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: all 0.3s ease;
}

@media (max-width: 480px) {
    .form-control {
        padding: 12px;
        font-size: 0.9rem;
        border-radius: 8px;
    }
}

.dark-theme .form-control {
    background-color: var(--dark-bg-secondary);
    border-color: var(--dark-border);
    color: var(--dark-text-primary);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.dark-theme .form-control:focus {
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.2);
}

.input-group {
    display: flex;
    gap: 12px;
    align-items: center;
}

@media (max-width: 480px) {
    .input-group {
        gap: 10px;
        flex-direction: column;
    }
    
    .input-group .form-control {
        width: 100%;
    }
}

.input-group .form-control {
    flex: 1;
}

.input-group-select {
    width: 120px;
    flex-shrink: 0;
}

@media (max-width: 480px) {
    .input-group-select {
        width: 100%;
    }
}

/* Minimum Amount Warning */
.minimum-warning {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(245, 158, 11, 0.05));
    border: 1px solid var(--warning);
    border-radius: 10px;
    margin-top: 12px;
    color: var(--warning);
    font-size: 0.85rem;
    font-weight: 500;
}

.minimum-warning i {
    font-size: 1rem;
    flex-shrink: 0;
}

.dark-theme .minimum-warning {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.15), rgba(245, 158, 11, 0.08));
}

/* Amount Display */
.amount-display {
    background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
    border-radius: 14px;
    padding: 24px;
    margin-top: 20px;
    border: 1px solid var(--border);
}

@media (max-width: 480px) {
    .amount-display {
        padding: 20px;
        border-radius: 12px;
    }
}

.dark-theme .amount-display {
    background: linear-gradient(135deg, var(--dark-bg-secondary), var(--dark-bg-tertiary));
    border-color: var(--dark-border);
}

.amount-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}

@media (max-width: 480px) {
    .amount-row {
        padding: 10px 0;
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }
    
    .amount-label {
        font-size: 0.8rem;
    }
    
    .amount-value {
        font-size: 0.9rem;
        width: 100%;
        text-align: right;
    }
}

.dark-theme .amount-row {
    border-bottom-color: var(--dark-border);
}

.amount-row:last-child {
    border-bottom: none;
    padding-top: 16px;
    margin-top: 8px;
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--paypal-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@media (max-width: 480px) {
    .amount-row:last-child {
        font-size: 1.1rem;
        padding-top: 12px;
    }
}

.dark-theme .amount-row:last-child {
    background: linear-gradient(135deg, var(--primary-light), var(--paypal-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.dark-theme .amount-label {
    color: var(--dark-text-secondary);
}

.amount-value {
    font-weight: 600;
    font-size: 0.95rem;
}

.bonus-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    background: linear-gradient(135deg, var(--success-light), var(--success));
    color: white;
    border-radius: 16px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-left: 8px;
}

@media (max-width: 480px) {
    .bonus-badge {
        font-size: 0.75rem;
        padding: 4px 10px;
    }
}

/* Payment Summary */
.payment-summary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border-radius: 18px;
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: 0 10px 40px rgba(37, 99, 235, 0.25);
}

@media (max-width: 480px) {
    .payment-summary {
        padding: 20px;
        border-radius: 16px;
        margin-bottom: 20px;
    }
}

.payment-summary-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.payment-summary-icon {
    width: 48px;
    height: 48px;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    backdrop-filter: blur(10px);
    flex-shrink: 0;
}

@media (max-width: 480px) {
    .payment-summary-icon {
        width: 40px;
        height: 40px;
        font-size: 20px;
    }
}

.payment-summary-title {
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.3;
}

@media (max-width: 480px) {
    .payment-summary-title {
        font-size: 1.1rem;
    }
}

.payment-summary-subtitle {
    opacity: 0.9;
    font-size: 0.9rem;
    margin-top: 4px;
    line-height: 1.4;
}

@media (max-width: 480px) {
    .payment-summary-subtitle {
        font-size: 0.8rem;
    }
}

.payment-details {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

@media (max-width: 480px) {
    .payment-details {
        gap: 12px;
    }
}

.payment-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    flex-wrap: wrap;
    gap: 8px;
}

@media (max-width: 480px) {
    .payment-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }
    
    .payment-label, .payment-value {
        width: 100%;
        text-align: left;
    }
    
    .payment-value {
        text-align: right;
    }
}

.payment-item:last-child {
    border-bottom: none;
    font-size: 1.5rem;
    font-weight: 800;
    padding-top: 12px;
    margin-top: 8px;
}

@media (max-width: 480px) {
    .payment-item:last-child {
        font-size: 1.25rem;
    }
}

.payment-label {
    opacity: 0.9;
    font-size: 0.9rem;
}

@media (max-width: 480px) {
    .payment-label {
        font-size: 0.85rem;
    }
}

.payment-value {
    font-weight: 600;
    font-size: 0.95rem;
}

@media (max-width: 480px) {
    .payment-value {
        font-size: 0.9rem;
    }
}

/* Wallet Info */
.wallet-info {
    background-color: var(--bg-secondary);
    border-radius: 18px;
    padding: 24px;
    border: 1px solid var(--border);
    margin-top: 24px;
}

@media (max-width: 480px) {
    .wallet-info {
        padding: 20px;
        border-radius: 16px;
        margin-top: 20px;
    }
}

.dark-theme .wallet-info {
    background-color: var(--dark-bg-secondary);
    border-color: var(--dark-border);
}

.wallet-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.wallet-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--primary), var(--paypal-blue));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
    flex-shrink: 0;
}

@media (max-width: 480px) {
    .wallet-icon {
        width: 40px;
        height: 40px;
        font-size: 18px;
    }
}

.wallet-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
}

@media (max-width: 480px) {
    .wallet-title {
        font-size: 1rem;
    }
}

.dark-theme .wallet-title {
    color: var(--dark-text-primary);
}

.wallet-address {
    background-color: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 16px;
    font-family: 'SF Mono', 'Monaco', 'Courier New', monospace;
    word-break: break-all;
    margin: 16px 0;
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--text-primary);
    overflow-x: auto;
}

@media (max-width: 480px) {
    .wallet-address {
        padding: 12px;
        font-size: 0.75rem;
        margin: 12px 0;
    }
}

.dark-theme .wallet-address {
    background-color: var(--dark-bg-primary);
    border-color: var(--dark-border);
    color: var(--dark-text-primary);
}

.qr-container {
    display: flex;
    justify-content: center;
    margin: 24px 0;
}

@media (max-width: 480px) {
    .qr-container {
        margin: 20px 0;
    }
}

.qr-code {
    width: 180px;
    height: 180px;
    background-color: white;
    border-radius: 14px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: #1e293b;
    font-weight: 700;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border);
}

@media (max-width: 480px) {
    .qr-code {
        width: 160px;
        height: 160px;
        padding: 14px;
    }
}

.qr-code i {
    font-size: 64px;
    color: #1e293b;
    opacity: 0.7;
}

@media (max-width: 480px) {
    .qr-code i {
        font-size: 56px;
    }
}

.qr-label {
    font-size: 0.9rem;
    color: #64748b;
    text-align: center;
}

@media (max-width: 480px) {
    .qr-label {
        font-size: 0.8rem;
    }
}

/* Timer */
.timer {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(245, 158, 11, 0.05));
    border: 2px solid var(--warning);
    border-radius: 14px;
    padding: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 24px;
    color: var(--warning);
    font-weight: 700;
    font-size: 1rem;
    flex-wrap: wrap;
}

@media (max-width: 480px) {
    .timer {
        padding: 14px;
        margin-top: 20px;
        font-size: 0.9rem;
        gap: 8px;
        flex-direction: column;
        text-align: center;
    }
}

.timer i {
    font-size: 1.25rem;
}

/* Buttons */
.btn {
    padding: 14px 24px;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-width: 120px;
}

@media (max-width: 480px) {
    .btn {
        padding: 12px 20px;
        font-size: 0.9rem;
        min-width: 100px;
        width: 100%;
    }
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(37, 99, 235, 0.4);
}

.btn-secondary {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border: 2px solid var(--border);
}

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

.btn-secondary:hover {
    background-color: var(--bg-secondary);
    border-color: var(--text-secondary);
    transform: translateY(-2px);
}

.dark-theme .btn-secondary:hover {
    background-color: var(--dark-bg-tertiary);
    border-color: var(--dark-text-secondary);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

.button-group {
    display: flex;
    gap: 16px;
    margin-top: 32px;
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .button-group {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .button-group {
        margin-top: 24px;
        gap: 12px;
    }
}

/* Price Ticker */
.price-ticker {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.ticker-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    border-radius: 10px;
    background-color: var(--bg-secondary);
    border: 1px solid transparent;
    transition: all 0.3s ease;
}

@media (max-width: 480px) {
    .ticker-item {
        padding: 10px;
    }
}

.dark-theme .ticker-item {
    background-color: var(--dark-bg-secondary);
}

.ticker-item:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--border);
    transform: translateX(4px);
}

.dark-theme .ticker-item:hover {
    background-color: var(--dark-bg-tertiary);
    border-color: var(--dark-border);
}

.ticker-crypto {
    display: flex;
    align-items: center;
    gap: 12px;
}

.ticker-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 18px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    flex-shrink: 0;
}

@media (max-width: 480px) {
    .ticker-icon {
        width: 32px;
        height: 32px;
        font-size: 16px;
    }
    
    .ticker-icon img {
        width: 18px;
        height: 18px;
    }
}

.ticker-symbol {
    font-weight: 700;
    margin-bottom: 2px;
    font-size: 0.95rem;
}

@media (max-width: 480px) {
    .ticker-symbol {
        font-size: 0.85rem;
    }
}

.ticker-name {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

@media (max-width: 480px) {
    .ticker-name {
        font-size: 0.75rem;
    }
}

.dark-theme .ticker-name {
    color: var(--dark-text-secondary);
}

.ticker-price {
    text-align: right;
    flex-shrink: 0;
}

.ticker-price-value {
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 4px;
}

@media (max-width: 480px) {
    .ticker-price-value {
        font-size: 0.9rem;
    }
}

.ticker-price-change {
    font-size: 0.8rem;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: 16px;
    display: inline-block;
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

@media (max-width: 480px) {
    .ticker-price-change {
        font-size: 0.75rem;
        padding: 2px 6px;
    }
}

.ticker-price-change.negative {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--error);
}

/* Sidebar Cards */
.sidebar-card {
    margin-bottom: 24px;
}

@media (max-width: 480px) {
    .sidebar-card {
        margin-bottom: 20px;
    }
}

.rate-card {
    background: linear-gradient(135deg, var(--success-light), var(--success));
    color: white;
    padding: 20px;
    border-radius: 14px;
    box-shadow: 0 8px 30px rgba(16, 185, 129, 0.3);
}

@media (max-width: 480px) {
    .rate-card {
        padding: 16px;
        border-radius: 12px;
    }
}

.rate-card-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 8px;
}

@media (max-width: 480px) {
    .rate-card-title {
        font-size: 1.1rem;
    }
}

.rate-card-value {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 12px;
}

@media (max-width: 480px) {
    .rate-card-value {
        font-size: 1.75rem;
    }
}

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

@media (max-width: 480px) {
    .rate-card-subtitle {
        font-size: 0.8rem;
    }
}

/* PayPal Info */
.paypal-info {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background-color: var(--bg-secondary);
    border-radius: 14px;
    border: 1px solid var(--border);
    margin-top: 20px;
}

@media (max-width: 480px) {
    .paypal-info {
        padding: 14px;
        gap: 10px;
        border-radius: 12px;
        margin-top: 16px;
    }
}

.dark-theme .paypal-info {
    background-color: var(--dark-bg-secondary);
    border-color: var(--dark-border);
}

.paypal-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--paypal-blue), var(--paypal-light));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
    flex-shrink: 0;
}

@media (max-width: 480px) {
    .paypal-icon {
        width: 40px;
        height: 40px;
        font-size: 18px;
    }
}

.paypal-text {
    flex: 1;
}

.paypal-title {
    font-weight: 700;
    margin-bottom: 4px;
    font-size: 0.95rem;
}

@media (max-width: 480px) {
    .paypal-title {
        font-size: 0.9rem;
    }
}

.paypal-subtitle {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

@media (max-width: 480px) {
    .paypal-subtitle {
        font-size: 0.75rem;
    }
}

.dark-theme .paypal-subtitle {
    color: var(--dark-text-secondary);
}

/* Footer */
footer {
    padding: 40px 0 32px;
    margin-top: 60px;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border);
}

@media (max-width: 480px) {
    footer {
        padding: 32px 0 24px;
        margin-top: 40px;
    }
}

.dark-theme footer {
    background-color: var(--dark-bg-secondary);
    border-top-color: var(--dark-border);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    text-align: center;
}

.security-badges {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
}

@media (max-width: 480px) {
    .security-badges {
        gap: 8px;
    }
}

.badge {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background-color: var(--bg-primary);
    border-radius: 10px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    transition: all 0.3s ease;
    white-space: nowrap;
}

@media (max-width: 480px) {
    .badge {
        padding: 8px 12px;
        font-size: 0.75rem;
        gap: 6px;
    }
}

.dark-theme .badge {
    background-color: var(--dark-bg-primary);
    color: var(--dark-text-secondary);
    border-color: var(--dark-border);
}

.badge:hover {
    transform: translateY(-2px);
    box-shadow: var(--card-shadow);
    border-color: var(--primary);
    color: var(--primary);
}

.badge i {
    color: var(--primary);
}

.disclaimer {
    color: var(--text-secondary);
    font-size: 0.8rem;
    max-width: 600px;
    line-height: 1.6;
}

@media (max-width: 480px) {
    .disclaimer {
        font-size: 0.75rem;
        line-height: 1.5;
    }
}

.dark-theme .disclaimer {
    color: var(--dark-text-secondary);
}

.copyright {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    margin-top: 16px;
}

@media (max-width: 480px) {
    .copyright {
        font-size: 0.75rem;
        margin-top: 12px;
    }
}

.dark-theme .copyright {
    color: var(--dark-text-tertiary);
}

/* Screen transitions */
.screen {
    display: none;
}

.screen.active {
    display: block;
    animation: fadeInUp 0.5s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Main Layout */
.main-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 28px;
}

@media (min-width: 1024px) {
    .main-layout {
        grid-template-columns: 2fr 1fr;
    }
}

/* Payment Processing Modal */
.payment-processing {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.payment-processing.active {
    opacity: 1;
    visibility: visible;
}

.processing-content {
    background: linear-gradient(135deg, var(--bg-primary), var(--bg-secondary));
    border-radius: 20px;
    padding: 40px;
    max-width: 500px;
    width: 90%;
    text-align: center;
    transform: translateY(20px);
    transition: transform 0.3s ease;
    border: 1px solid var(--border);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

@media (max-width: 480px) {
    .processing-content {
        padding: 30px 24px;
        width: 95%;
    }
}

.payment-processing.active .processing-content {
    transform: translateY(0);
}

.dark-theme .processing-content {
    background: linear-gradient(135deg, var(--dark-bg-secondary), var(--dark-bg-primary));
    border-color: var(--dark-border);
}

.processing-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--success), var(--success-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 36px;
    color: white;
    animation: pulse 2s infinite;
}

@media (max-width: 480px) {
    .processing-icon {
        width: 60px;
        height: 60px;
        font-size: 28px;
        margin-bottom: 20px;
    }
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4);
    }
    70% {
        box-shadow: 0 0 0 20px rgba(16, 185, 129, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
    }
}

.processing-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--success), var(--success-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@media (max-width: 480px) {
    .processing-title {
        font-size: 1.5rem;
        margin-bottom: 12px;
    }
}

.processing-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 8px;
    line-height: 1.5;
}

@media (max-width: 480px) {
    .processing-subtitle {
        font-size: 1rem;
    }
}

.processing-details {
    background: var(--bg-tertiary);
    border-radius: 12px;
    padding: 20px;
    margin: 24px 0;
    text-align: left;
}

@media (max-width: 480px) {
    .processing-details {
        padding: 16px;
        margin: 20px 0;
    }
}

.dark-theme .processing-details {
    background: var(--dark-bg-tertiary);
}

.processing-details p {
    margin-bottom: 12px;
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

@media (max-width: 480px) {
    .processing-details p {
        font-size: 0.85rem;
        margin-bottom: 10px;
    }
}

.processing-details p:last-child {
    margin-bottom: 0;
}

.processing-details strong {
    color: var(--text-primary);
    font-weight: 600;
}

.dark-theme .processing-details strong {
    color: var(--dark-text-primary);
}

.processing-timer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 20px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary);
}

.dark-theme .processing-timer {
    color: var(--primary-light);
}

.processing-spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Notification */
.notification {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: linear-gradient(135deg, var(--success), var(--success-light));
    color: white;
    padding: 16px 20px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(16, 185, 129, 0.3);
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 2001;
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    max-width: 400px;
}

@media (max-width: 768px) {
    .notification {
        left: 24px;
        right: 24px;
        max-width: none;
        bottom: 16px;
    }
}

.notification.show {
    transform: translateY(0);
    opacity: 1;
}

.notification i {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.notification span {
    flex: 1;
    font-size: 0.95rem;
    line-height: 1.5;
}

/* Responsive */
@media (max-width: 1024px) {
    .tradingview-widget {
        height: 350px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }

    .progress-steps {
        margin-bottom: 40px;
    }
}

@media (max-width: 480px) {
    .header-actions {
        gap: 8px;
    }

    .price-update {
        padding: 6px 10px;
        font-size: 0.7rem;
    }

    .step-label {
        font-size: 0.7rem;
    }
}