body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, rgb(248 250 252) 0%, rgb(239 246 255) 50%, rgb(224 231 255) 100%);
}

.dark body {
    background: linear-gradient(135deg, rgb(15 23 42) 0%, rgb(30 41 59) 50%, rgb(51 65 85) 100%);
}

.card-gradient-chase {
    background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
    position: relative;
}

.card-gradient-chase::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, transparent 50%);
    pointer-events: none;
}

.card-gradient-united {
    background: linear-gradient(135deg, #0369a1 0%, #0ea5e9 100%);
    position: relative;
}

.card-gradient-united::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, transparent 50%);
    pointer-events: none;
}

.card-gradient-amex {
    background: linear-gradient(135deg, #475569 0%, #64748b 100%);
    position: relative;
}

.card-gradient-amex::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, transparent 50%);
    pointer-events: none;
}

.card-gradient-custom {
    background: linear-gradient(135deg, #6b46c1 0%, #8b5cf6 100%);
    position: relative;
}

.card-gradient-custom::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, transparent 50%);
    pointer-events: none;
}

.benefit-card {
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    transform: translateY(0);
}

.benefit-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.dark .benefit-card:hover {
    box-shadow: 0 25px 50px -12px rgba(255, 255, 255, 0.1);
}

.summary-card {
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    transform: translateY(0);
}

.summary-card:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.dark .summary-card:hover {
    box-shadow: 0 25px 50px -12px rgba(255, 255, 255, 0.1);
}

/* Tab animation */
.tab-button {
    position: relative;
    overflow: hidden;
}

.tab-button::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, #3b82f6, #8b5cf6);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.tab-button.active::before {
    transform: scaleX(1);
}

/* Smooth page transitions */
.page-transition {
    animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Enhanced button styles */
.btn-primary {
    background: linear-gradient(135deg, #3b82f6 0%, #6366f1 100%);
    transition: all 0.3s ease;
    box-shadow: 0 4px 14px 0 rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #2563eb 0%, #4f46e5 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4);
}

/* Backdrop blur effects */
.backdrop-blur-glass {
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

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

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* Improved focus states */
button:focus-visible {
    outline: 2px solid #3b82f6;
    outline-offset: 2px;
}

/* Enhanced scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(148, 163, 184, 0.1);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: rgba(148, 163, 184, 0.3);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(148, 163, 184, 0.5);
}

.dark ::-webkit-scrollbar-track {
    background: rgba(71, 85, 105, 0.1);
}

.dark ::-webkit-scrollbar-thumb {
    background: rgba(71, 85, 105, 0.3);
}

.dark ::-webkit-scrollbar-thumb:hover {
    background: rgba(71, 85, 105, 0.5);
}