/* ============================================================================
   ENHANCED BILLING BUTTONS - Modern Interactive Design
   ============================================================================ */

/* Primary Action Buttons (Upgrade, Subscribe, etc.) */
.upgrade-btn,
.pricing-btn.btn-primary,
.billing-action-btn {
    position: relative;
    padding: 14px 32px;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
    text-transform: none;
    letter-spacing: 0.5px;
    
    /* Gradient background with animation */
    background: linear-gradient(135deg, #aa336a 0%, #ff0077 50%, #aa336a 100%);
    background-size: 200% 200%;
    color: white;
    
    /* Enhanced shadow with glow effect */
    box-shadow: 
        0 4px 15px rgba(170, 51, 106, 0.3),
        0 0 0 0 rgba(170, 51, 106, 0.4);
    
    /* Subtle inner shine */
    &::before {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: linear-gradient(
            90deg, 
            transparent, 
            rgba(255, 255, 255, 0.2), 
            transparent
        );
        transition: left 0.6s ease;
    }
}

.upgrade-btn:hover,
.pricing-btn.btn-primary:hover,
.billing-action-btn:hover {
    transform: translateY(-2px) scale(1.02);
    background-position: 100% 0;
    box-shadow: 
        0 8px 25px rgba(170, 51, 106, 0.4),
        0 0 0 3px rgba(170, 51, 106, 0.1);
    
    &::before {
        left: 100%;
    }
}

.upgrade-btn:active,
.pricing-btn.btn-primary:active,
.billing-action-btn:active {
    transform: translateY(-1px) scale(1.01);
    transition: all 0.1s ease;
}

/* Secondary Action Buttons (Cancel, Contact Sales, etc.) */
.pricing-btn.contact-sales,
.billing-secondary-btn {
    position: relative;
    padding: 14px 32px;
    border: 2px solid transparent;
    border-radius: 12px;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
    
    /* Gradient border effect */
    background: 
        linear-gradient(white, white) padding-box,
        linear-gradient(135deg, #6366f1, #8b5cf6) border-box;
    color: #6366f1;
    
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.2);
    
    &::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: linear-gradient(135deg, #6366f1, #8b5cf6);
        opacity: 0;
        transition: opacity 0.3s ease;
        z-index: -1;
    }
}

.pricing-btn.contact-sales:hover,
.billing-secondary-btn:hover {
    transform: translateY(-2px);
    color: white;
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.3);
    
    &::before {
        opacity: 1;
    }
}

/* Outlined Buttons (View Details, etc.) */
.billing-outline-btn,
.pricing-btn.btn-outline {
    position: relative;
    padding: 12px 28px;
    border: 2px solid #e5e7eb;
    border-radius: 10px;
    background: white;
    color: #374151;
    font-weight: 500;
    font-size: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    overflow: hidden;
    
    &::before {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: linear-gradient(135deg, #aa336a, #ff0077);
        transition: left 0.4s ease;
        z-index: -1;
    }
}

.billing-outline-btn:hover,
.pricing-btn.btn-outline:hover {
    border-color: #aa336a;
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(170, 51, 106, 0.2);
    
    &::before {
        left: 0;
    }
}

/* Disabled State */
.upgrade-btn:disabled,
.pricing-btn:disabled,
.billing-action-btn:disabled {
    background: linear-gradient(135deg, #e5e7eb, #d1d5db);
    color: #9ca3af;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
    
    &::before {
        display: none;
    }
    
    &:hover {
        transform: none;
        box-shadow: none;
        background-position: 0 0;
    }
}

/* Current Plan Badge Button */
.current-plan-btn {
    position: relative;
    padding: 12px 24px;
    border: 2px solid #10b981;
    border-radius: 10px;
    background: linear-gradient(135deg, #ecfdf5, #d1fae5);
    color: #065f46;
    font-weight: 600;
    font-size: 14px;
    cursor: default;
    
    &::after {
        content: '✓';
        margin-left: 8px;
        font-weight: bold;
    }
}

/* Danger/Cancel Buttons */
.billing-danger-btn,
.cancel-subscription-btn {
    position: relative;
    padding: 12px 28px;
    border: 2px solid #fecaca;
    border-radius: 10px;
    background: white;
    color: #dc2626;
    font-weight: 500;
    font-size: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    
    &:hover {
        background: #fef2f2;
        border-color: #dc2626;
        transform: translateY(-1px);
        box-shadow: 0 4px 12px rgba(220, 38, 38, 0.2);
    }
    
    &:active {
        transform: translateY(0);
        background: #fee2e2;
    }
}

/* Button Groups */
.billing-button-group {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
    margin-top: 20px;
}

.billing-button-group .btn {
    margin: 0;
}

/* Small Action Buttons */
.billing-btn-sm {
    padding: 8px 16px;
    font-size: 14px;
    border-radius: 8px;
}

/* Loading State */
.billing-btn-loading {
    position: relative;
    color: transparent;
    pointer-events: none;
    
    &::after {
        content: '';
        position: absolute;
        top: 50%;
        left: 50%;
        width: 16px;
        height: 16px;
        margin: -8px 0 0 -8px;
        border: 2px solid transparent;
        border-top: 2px solid currentColor;
        border-radius: 50%;
        animation: billing-btn-spin 1s linear infinite;
        color: white;
    }
}

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

/* Pulse Animation for Important Actions */
.billing-btn-pulse {
    animation: billing-pulse 2s infinite;
}

@keyframes billing-pulse {
    0% {
        box-shadow: 0 4px 15px rgba(170, 51, 106, 0.3);
    }
    50% {
        box-shadow: 0 4px 15px rgba(170, 51, 106, 0.5);
    }
    100% {
        box-shadow: 0 4px 15px rgba(170, 51, 106, 0.3);
    }
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .upgrade-btn,
    .pricing-btn,
    .billing-action-btn {
        width: 100%;
        padding: 16px 24px;
        font-size: 16px;
    }
    
    .billing-button-group {
        flex-direction: column;
        gap: 8px;
    }
    
    .billing-button-group .btn {
        width: 100%;
        justify-content: center;
    }
}

/* Focus States for Accessibility */
.upgrade-btn:focus,
.pricing-btn:focus,
.billing-action-btn:focus,
.billing-outline-btn:focus {
    outline: none;
    box-shadow: 
        0 4px 15px rgba(170, 51, 106, 0.3),
        0 0 0 3px rgba(170, 51, 106, 0.2);
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .upgrade-btn,
    .pricing-btn.btn-primary,
    .billing-action-btn {
        border: 2px solid #000;
    }
    
    .billing-outline-btn,
    .pricing-btn.btn-outline {
        border-width: 3px;
    }
}