/* Buttons */
button {
    background: rgba(0, 122, 255, 0.9);
    backdrop-filter: blur(20px);
    color: white;
    border: none;
    padding: 16px 32px;
    border-radius: 20px;
    font-size: 17px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    box-shadow: 
        0 8px 32px rgba(0, 122, 255, 0.3),
        0 2px 8px rgba(0, 122, 255, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
    display: inline-flex;
    align-items: center;
    gap: 12px;
    position: relative;
    overflow: hidden;
    letter-spacing: -0.01em;
}

button::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;
}

button:hover::before {
    left: 100%;
}

button:hover {
    background: rgba(0, 122, 255, 1);
    transform: translateY(-2px) scale(1.02);
    box-shadow: 
        0 16px 48px rgba(0, 122, 255, 0.4),
        0 4px 16px rgba(0, 122, 255, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

button:active {
    transform: translateY(0) scale(0.98);
    transition: all 0.1s ease;
}

button:disabled {
    background: rgba(142, 142, 147, 0.6);
    cursor: not-allowed;
    transform: none;
    box-shadow: 
        0 4px 16px rgba(142, 142, 147, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.confirm-btn {
    background: rgba(52, 199, 89, 0.9);
    backdrop-filter: blur(20px);
}

.confirm-btn:hover {
    background: rgba(52, 199, 89, 1);
    box-shadow: 
        0 16px 48px rgba(52, 199, 89, 0.4),
        0 4px 16px rgba(52, 199, 89, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

.add-item-btn {
    background: linear-gradient(135deg, #e67e22 0%, #f39c12 100%);
    margin-top: 20px;
}

.add-item-btn:hover {
    background: linear-gradient(135deg, #f39c12 0%, #e67e22 100%);
    box-shadow: 0 12px 35px rgba(230, 126, 34, 0.4);
}